嫩江河漫滩沉积物碎屑锆石U-Pb年龄、Hf同位素组成及其地质意义

doi:10.19657/j.geoscience.1000-8527.2022.036

摘要/Abstract

摘要：

利用LA-(MC)-ICP-MS技术,对嫩江河漫滩沉积物碎屑锆石进行了U-Pb定年和Hf同位素组成分析研究。结果显示,293颗碎屑锆石多为岩浆成因锆石,其U-Pb年龄主要分为4组:2300~1746 Ma、363~331 Ma、316~260 Ma和252~86 Ma。中生代碎屑锆石占到全部数量的80.9%,说明该时期源区岩浆活动强烈。嫩江流域不同时代地层的相对出露面积不同:侏罗系—白垩系约占72%,石炭系—二叠系约占13%,三叠系约占8%,前寒武系约占5%,寒武系—志留系约占1%。结合Lu-Hf同位素分析结果进一步分析嫩江流域大陆地壳的形成与演化历史。嫩江流域大陆地壳主要以新生地壳的产生为主,1200~400 Ma时期是嫩江流域地壳强烈增生阶段,构成了现今地壳的98.8%,可能与古亚洲洋的发展与关闭等过程有关;400~100 Ma时期嫩江流域发生了壳内再循环的岩浆作用。依据前人公式计算了嫩江河漫滩沉积物源区不同时期大陆地壳的重熔/增生比例。中生代锆石重熔比例较低,含有约70%的新生物质。该现象与蒙古—鄂霍次克洋和古太平洋俯冲引起地幔物质的部分熔融有关。

关键词: 嫩江, 碎屑锆石, U-Pb年龄, Hf同位素

Abstract:

In this study, we conducted LA-(MC)-ICP-MS U-Pb dating and Hf isotope analysis on detrital zircons from the Nenjiang River floodplain sediments. The results show that the U-Pb ages of 293 detrital zircons can be divided into four major groups, i.e., 2,300-1,746 Ma, 363-331 Ma, 316-260 Ma, and 252-86 Ma. Mesozoic detrital zircons account for 80.9% of the total amount, indicating strong magmatism in the source region during this period. The relative outcrop size of strata (of different ages) is different in the basin: Jurassic-Cretaceous (~72%), Carboniferous-Permian (~13%), Triassic (~8%), Precambrian (~5%), and Cambrian-Silurian (~1%). The Hf isotope composition may reflect the formation and evolution of continental crust in the Nenjiang River catchment. Continental crust in the Nenjiang River basin is mainly produced by juvenile crust formation. The ca. 1,200-400 Ma period likely represents a major continental growth event in NE China, which formed 98.8% crustal components of the present crust, which may be related to the Paleo-Asian Ocean development and subduction. During ca. 400-100 Ma, the Nenjiang Basin may have experienced intense intra-continental crustal recycling. Furthermore, using the formula of recycling ratio, the remelting vs. juvenile crust ratios have been calculated. The Mesozoic zircon have a low remelting ratio and contain about 70% juvenile crust. This phenomenon is related to the partial melting of mantle material caused by subduction of the Mongol-Okhotsk Ocean and Paleo-Pacific Ocean.

Key words: Nenjiang River, detrital zircon, U-Pb age, Hf isotope

中图分类号:

P512.2
P597

梁乾坤, 陈岳龙, 王善辉, 于洋, 杨帆. 嫩江河漫滩沉积物碎屑锆石U-Pb年龄、Hf同位素组成及其地质意义[J]. 现代地质, 2023, 37(03): 529-546.

LIANG Qiankun, CHEN Yuelong, WANG Shanhui, YU Yang, YANG Fan. Detrital Zircon U-Pb Age and Hf Isotopes and Their Geological Significance of the Nenjiang River Floodplain Sediments[J]. Geoscience, 2023, 37(03): 529-546.

图/表 12

图1 中国东北地区地质简图(据文献[29??-32]) F1.新林—喜桂图; F2.二连浩特—黑河; F3.索伦—西拉木伦—长春—延吉; F4.嘉荫—牡丹江; Ⅰ.额尔古纳地块; Ⅱ.兴安地块; Ⅲ.松嫩地块; Ⅳ.华北克拉通; Ⅴ.佳木斯地块

Fig.1 Simplified geological map of NE China (from refs.[29??-32])

表1 嫩江河流沉积物碎屑锆石U-Pb同位素分析数据

Table 1 U-Pb isotope data of detrital zircons from the Nenjiang River sediments

测点	质量分数 (10^-6)			Th/U	同位素比值			年龄(Ma)			谐和度 (%)
测点	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb (1σ)	²⁰⁷Pb/²³⁵U (1σ)	²⁰⁶Pb/²³⁸U (1σ)	²⁰⁷Pb/ ²⁰⁶Pb(1σ)	²⁰⁷Pb/ ²³⁵U(1σ)	²⁰⁶Pb/ ²³⁸U(1σ)	谐和度 (%)
NJ-1	4	183	168	1.09	0.0537(0.0042)	0.1370(0.0098)	0.0186(0.0006)	367(178)	130(9)	119(4)	90
NJ-2	3	102	139	0.73	0.0509(0.0033)	0.1245(0.0082)	0.0177(0.0004)	235(155)	119(7)	113(3)	95
NJ-3	20	1711	932	1.84	0.0495(0.0010)	0.1526(0.0022)	0.0224(0.0003)	172(46)	144(2)	143(2)	99
NJ-4	3	172	134	1.28	0.0507(0.0024)	0.1279(0.0028)	0.0184(0.0006)	228(107)	122(3)	118(4)	96
NJ-5	4	155	212	0.73	0.0542(0.0024)	0.3077(0.0129)	0.0412(0.0004)	389(98)	272(10)	260(3)	95
NJ-6	4	225	126	1.79	0.0550(0.0074)	0.1335(0.0105)	0.0177(0.0010)	413(304)	127(9)	113(6)	88
NJ-7	3	190	169	1.12	0.0508(0.0014)	0.1286(0.0034)	0.0184(0.0002)	232(63)	123(3)	118(1)	95
NJ-8	3	58	55	1.05	0.0522(0.0020)	0.3032(0.0108)	0.0422(0.0007)	295(86)	269(8)	266(4)	99
NJ-9	10	861	551	1.56	0.0520(0.0014)	0.1336(0.0026)	0.0187(0.0002)	287(56)	127(2)	119(1)	93
NJ-10	4	290	147	1.97	0.0486(0.0027)	0.1233(0.0084)	0.0184(0.0008)	132(122)	118(8)	117(5)	99
NJ-11	2	55	59	0.93	0.0527(0.0040)	0.1315(0.0099)	0.0184(0.0006)	317(176)	125(9)	117(4)	93
NJ-12	2	99	110	0.90	0.0505(0.0023)	0.2264(0.0081)	0.0327(0.0006)	220(99)	207(7)	207(4)	99
NJ-13	6	365	242	1.51	0.0509(0.0031)	0.1260(0.0089)	0.0179(0.0005)	239(136)	121(8)	115(3)	94
NJ-14	3	63	90	0.70	0.0519(0.0026)	0.3018(0.0110)	0.0423(0.0015)	280(115)	268(9)	267(9)	99
NJ-15	9	1119	450	2.49	0.0522(0.0011)	0.1228(0.0039)	0.0170(0.0003)	295(44)	118(4)	109(2)	92
NJ-16	2	63	42	1.51	0.0490(0.0037)	0.1225(0.0095)	0.0182(0.0005)	146(176)	117(9)	116(3)	99
NJ-17	7	606	341	1.78	0.0509(0.0010)	0.1540(0.0027)	0.0220(0.0002)	235(43)	145(2)	140(1)	96
NJ-18	1	64	44	1.45	0.0500(0.0027)	0.1239(0.0063)	0.0182(0.0004)	195(126)	119(6)	116(3)	97
NJ-19	2	136	128	1.06	0.0485(0.0019)	0.1199(0.0045)	0.0180(0.0002)	124(93)	115(4)	115(1)	99
NJ-20	0	19	19	1.05	0.0500(0.0032)	0.1439(0.0086)	0.0214(0.0005)	195(153)	136(8)	136(3)	99
NJ-21	7	276	153	1.81	0.0522(0.0017)	0.1213(0.0071)	0.0168(0.0004)	295(74)	116(6)	108(3)	92
NJ-22	6	282	262	1.08	0.0524(0.0032)	0.1330(0.0087)	0.0184(0.0004))	302(136)	127(8)	118(3)	92
NJ-23	2	207	192	1.08	0.0510(0.0009)	0.1312(0.0022)	0.0187(0.0002)	239(34)	125(2)	119(1)	95
NJ-24	2	119	134	0.89	0.0498(0.0075)	0.1516(0.0146)	0.0224(0.0011)	187(315)	143(13)	143(7)	99
NJ-25	2	147	110	1.33	0.0495(0.0024)	0.1201(0.0060)	0.0177(0.0003)	169(115)	115(5)	113(2)	97
NJ-26	1	22	34	0.65	0.0512(0.0052)	0.2299(0.0290)	0.0321(0.0021)	250(215)	210(24)	204(13)	96
NJ-27	6	668	305	2.19	0.0510(0.0018)	0.1282(0.0041)	0.0183(0.0005)	243(77)	122(4)	117(3)	95
NJ-28	1	53	48	1.12	0.0497(0.0022)	0.1271(0.0051)	0.0188(0.0004)	189(104)	121(5)	120(2)	98
NJ-29	7	625	421	1.48	0.0510(0.0019)	0.1322(0.0051)	0.0188(0.0002)	243(89)	126(5)	120(1)	95
NJ-30	1	75	38	1.97	0.0502(0.0044)	0.1210(0.0092)	0.0180(0.0008)	211(183)	116(8)	115(5)	98
NJ-31	2	151	89	1.70	0.0510(0.0021)	0.1293(0.0052)	0.0186(0.0004)	243(101)	123(5)	119(3)	95
NJ-32	9	284	297	0.96	0.0542(0.0008)	0.3140(0.0047)	0.0420(0.0004)	389(31)	277(4)	265(2)	95
NJ-33	1	96	93	1.03	0.0492(0.0019)	0.1266(0.0044)	0.0188(0.0005)	167(82)	121(4)	120(3)	99
NJ-34	1	138	63	2.18	0.0500(0.0033)	0.1223(0.0078)	0.0180(0.0003)	195(152)	117(7)	115(2)	97
NJ-35	3	232	142	1.64	0.0495(0.0061)	0.1270(0.0186)	0.0185(0.0004)	172(267)	121(17)	118(3)	97
NJ-36	3	206	189	1.09	0.0509(0.0024)	0.1324(0.0053)	0.0189(0.0003)	235(107)	126(5)	121(2)	95
NJ-37	4	221	185	1.19	0.0535(0.0018)	0.3991(0.0204)	0.0540(0.0014)	350(78)	341(15)	339(8)	99
NJ-38	2	120	84	1.42	0.0492(0.0030)	0.1274(0.0053)	0.0190(0.0007)	167(145)	122(5)	121(4)	99
NJ-39	1	47	45	1.04	0.0571(0.0021)	0.5034(0.0216)	0.0639(0.0013)	494(80)	414(15)	399(8)	96
NJ-40	0	17	16	1.04	0.0520(0.0089)	0.1464(0.0220)	0.0216(0.0018)	287(352)	139(19)	138(11)	99
NJ-41	2	103	85	1.21	0.0501(0.0020)	0.1285(0.0050)	0.0188(0.0003)	198(93)	123(4)	120(2)	97
NJ-42	2	67	57	1.18	0.0495(0.0024)	0.1445(0.0070)	0.0213(0.0005)	172(115)	137(6)	136(3)	99
NJ-43	2	48	33	1.46	0.0528(0.0084)	0.1262(0.0129)	0.0182(0.0018)	320(335)	121(12)	116(12)	96
NJ-44	3	54	47	1.15	0.0542(0.0031)	0.3121(0.0165)	0.0420(0.0012)	389(130)	276(13)	265(7)	96
NJ-45	3	141	131	1.08	0.0500(0.0020)	0.1298(0.0045)	0.0189(0.0004)	195(94)	124(4)	121(3)	97
NJ-46	3	99	121	0.82	0.0498(0.0061)	0.1477(0.0134)	0.0219(0.0008)	183(272)	140(12)	140(5)	99
NJ-47	3	285	174	1.63	0.0489(0.0014)	0.1239(0.0034)	0.0184(0.0003)	143(69)	119(3)	118(2)	99
NJ-48	4	302	135	2.23	0.0485(0.0045)	0.1116(0.0077)	0.0168(0.0005)	120(207)	107(7)	107(3)	99
NJ-49	6	237	122	1.94	0.0489(0.0020)	0.1489(0.0049)	0.0221(0.0003)	146(90)	141(4)	141(2)	99
NJ-50	11	351	338	1.04	0.0534(0.0015)	0.3073(0.0127)	0.0416(0.0010)	346(61)	272(10)	263(6)	96
NJ-51	10	274	227	1.21	0.0544(0.0015)	0.3945(0.0078)	0.0526(0.0008)	391(63)	338(6)	331(5)	97
NJ-52	0	33	21	1.60	0.0530(0.0090)	0.1308(0.0194)	0.0188(0.0009)	328(348)	125(17)	120(6)	96
NJ-53	2	149	171	0.87	0.0489(0.0019)	0.1281(0.0063)	0.0190(0.0004)	143(88)	122(6)	121(3)	99
NJ-54	3	89	71	1.24	0.0499(0.0026)	0.1269(0.0111)	0.0184(0.0011)	191(124)	121(10)	118(7)	96
NJ-55	29	518	211	2.45	0.0683(0.0006)	1.1091(0.0200)	0.1178(0.0018)	876(19)	758(10)	718(11)	94
NJ-56	6	227	141	1.61	0.0484(0.0034)	0.1245(0.0085)	0.0187(0.0007)	120(156)	119(8)	120(5)	99
NJ-57	1	99	84	1.17	0.0507(0.0020)	0.1291(0.0058)	0.0185(0.0003)	233(61)	123(5)	118(2)	95
NJ-58	7	312	347	0.90	0.0520(0.0011)	0.1928(0.0041)	0.0269(0.0003)	283(46)	179(4)	171(2)	95
NJ-59	3	41	24	1.72	0.0492(0.0001)	0.1284(0.0212)	0.0189(0.0031)	167(6)	123(19)	121(20)	98
NJ-60	2	121	113	1.06	0.0515(0.0017)	0.1563(0.0053)	0.0220(0.0004)	265(76)	147(5)	140(3)	95
NJ-61	2	45	42	1.05	0.0521(0.0113)	0.2957(0.0522)	0.0415(0.0017)	300(420)	263(41)	262(11)	99
NJ-62	1	139	92	1.51	0.0506(0.0052)	0.1306(0.0090)	0.0191(0.0009)	220(222)	125(8)	122(6)	97
NJ-63	2	29	29	1.00	0.0547(0.0031)	0.3063(0.0155)	0.0413(0.0016)	467(95)	271(12)	261(10)	96
NJ-64	0	49	25	1.93	0.0509(0.0063)	0.1246(0.0130)	0.0184(0.0007)	235(263)	119(12)	118(4)	98
NJ-65	2	33	33	0.99	0.0512(0.0080)	0.1321(0.0205)	0.0189(0.0013)	250(326)	126(18)	121(8)	95
NJ-66	17	1074	368	2.92	0.0530(0.0013)	0.2357(0.0089)	0.0322(0.0007)	328(25)	215(7)	204(4)	95
NJ-67	15	750	448	1.68	0.0528(0.0030)	0.3011(0.0094)	0.0414(0.0011)	320(134)	267(7)	261(7)	97
NJ-68	2	93	81	1.14	0.0491(0.0016)	0.1227(0.0040)	0.0182(0.0001)	154(76)	117(4)	116(1)	98
NJ-69	2	84	110	0.76	0.0494(0.0023)	0.1506(0.0076)	0.0221(0.0004)	169(109)	142(7)	141(3)	98
NJ-70	4	161	151	1.06	0.0490(0.0020)	0.1264(0.0046)	0.0188(0.0003)	150(94)	121(4)	120(2)	99
NJ-71	8	786	259	3.03	0.0509(0.0025)	0.1295(0.0034)	0.0186(0.0012)	235(111)	124(3)	119(7)	95
NJ-72	3	92	106	0.87	0.0502(0.0031)	0.1274(0.0059)	0.0187(0.0005)	206(146)	122(5)	119(3)	97
NJ-73	8	578	235	2.46	0.0505(0.0037)	0.1264(0.0066)	0.0183(0.0006)	217(177)	121(6)	117(4)	96
NJ-74	4	143	139	1.03	0.0498(0.0014)	0.1278(0.0048)	0.0187(0.0007)	183(68)	122(4)	119(5)	97
NJ-75	2	104	86	1.21	0.0488(0.0027)	0.1233(0.0075)	0.0184(0.0005)	200(68)	118(7)	117(3)	99
NJ-76	3	419	280	1.50	0.0490(0.0015)	0.1258(0.0035)	0.0186(0.0004)	150(72)	120(3)	119(3)	98
NJ-77	1	93	88	1.05	0.0490(0.0050)	0.1262(0.0124)	0.0188(0.0006)	146(226)	121(11)	120(4)	99
NJ-78	28	2338	1429	1.64	0.0496(0.0045)	0.1295(0.0084)	0.0190(0.0005)	176(200)	124(8)	121(3)	98
NJ-79	9	374	260	1.44	0.0540(0.0005)	0.3166(0.0125)	0.0425(0.0014)	369(22)	279(10)	268(9)	96
NJ-80	4	121	87	1.40	0.0529(0.0001)	0.1344(0.0157)	0.0184(0.0022)	324(4)	128(14)	118(14)	91
NJ-81	3	192	126	1.53	0.0561(0.0014)	0.2430(0.0060)	0.0315(0.0004)	457(28)	221(5)	200(3)	90
NJ-82	8	353	275	1.29	0.0563(0.0008)	0.3228(0.0067)	0.0418(0.0011)	461(31)	284(5)	264(7)	92
NJ-83	12	1410	366	3.85	0.0475(0.0030)	0.1212(0.0076)	0.0185(0.0007)	76(141)	116(7)	118(4)	98
NJ-84	8	519	481	1.08	0.0507(0.0020)	0.1301(0.0075)	0.0186(0.0006)	228(58)	124(7)	119(4)	95
NJ-85	4	176	87	2.02	0.0530(0.0016)	0.3483(0.0093)	0.0478(0.0014)	328(69)	303(7)	301(8)	99
NJ-86	9	600	627	0.96	0.0473(0.0004)	0.1223(0.0024)	0.0187(0.0002)	65(14)	117(2)	120(1)	97
NJ-87	1	11	23	0.49	0.0532(0.0052)	0.2334(0.0119)	0.0327(0.0029)	339(222)	213(10)	208(18)	97
NJ-88	4	27	20	1.39	0.0509(0.0091)	0.1256(0.0211)	0.0186(0.0011)	235(376)	120(19)	119(7)	98
NJ-D-1	82	75	82	0.90	0.0520(0.0007)	0.2211(0.0036)	0.0309(0.0004)	287(31)	203(3)	196(2)	103
NJ-D-2	245	31	241	0.13	0.1151(0.0006)	4.9660(0.0382)	0.3147(0.0032)	1883(10)	1814(7)	1764(16)	107
NJ-D-3	53	69	36	1.89	0.0518(0.0009)	0.1786(0.0037)	0.0251(0.0003)	276(41)	167(3)	160(2)	105
NJ-D-4	15	29	20	1.46	0.0505(0.0012)	0.1286(0.0030)	0.0186(0.0002)	217(56)	123(3)	119(1)	103
NJ-D-5	15	19	13	1.52	0.0494(0.0013)	0.1329(0.0034)	0.0197(0.0002)	169(61)	127(3)	126(1)	101
NJ-D-6	63	149	72	2.05	0.0508(0.0007)	0.1410(0.0019)	0.0202(0.0001)	232(33)	134(2)	129(1)	104
NJ-D-7	38	26	34	0.75	0.0592(0.0005)	0.6498(0.0065)	0.0796(0.0005)	576(14)	508(4)	494(3)	103
NJ-D-8	27	47	39	1.20	0.0514(0.0007)	0.1909(0.0026)	0.0270(0.0002)	261(36)	177(2)	172(1)	103
NJ-D-9	57	164	89	1.82	0.0505(0.0005)	0.1296(0.0014)	0.0187(0.0001)	217(24)	124(1)	119(1)	104
NJ-D-10	61	75	122	0.62	0.0692(0.0008)	0.4178(0.0051)	0.0438(0.0004)	906(24)	354(4)	276(2)	128
NJ-D-11	33	73	76	0.96	0.0491(0.0006)	0.1355(0.0017)	0.0200(0.0001)	154(30)	129(2)	128(1)	101
NJ-D-12	36	104	67	1.55	0.0513(0.0005)	0.1412(0.0015)	0.0200(0.0001)	254(22)	134(1)	128(1)	105
NJ-D-13	40	105	68	1.54	0.0498(0.0006)	0.1275(0.0015)	0.0186(0.0001)	183(30)	122(1)	119(1)	102
NJ-D-14	18	62	39	1.59	0.0511(0.0008)	0.1319(0.0020)	0.0188(0.0001)	256(35)	126(2)	120(1)	105
NJ-D-15	66	214	90	2.36	0.0496(0.0005)	0.1271(0.0012)	0.0186(0.0001)	189(29)	121(1)	119(1)	102
NJ-D-16	43	104	71	1.45	0.0520(0.0007)	0.1810(0.0023)	0.0253(0.0002)	287(30)	169(2)	161(1)	105
NJ-D-17	22	74	58	1.26	0.0504(0.0009)	0.1513(0.0030)	0.0218(0.0002)	213(43)	143(3)	139(1)	103
NJ-D-18	44	147	54	2.68	0.0498(0.0009)	0.1373(0.0024)	0.0200(0.0002)	187(43)	131(2)	128(1)	102
NJ-D-19	31	39	41	0.95	0.0516(0.0019)	0.1776(0.0058)	0.0250(0.0004)	333(81)	166(5)	159(2)	104
NJ-D-20	181	211	139	1.51	0.0545(0.0003)	0.3774(0.0029)	0.0502(0.0003)	394(8)	325(2)	316(2)	103
NJ-D-21	18	78	50	1.53	0.0504(0.0007)	0.1296(0.0018)	0.0187(0.0001)	213(33)	124(2)	120(1)	104
NJ-D-22	10	55	34	1.61	0.0486(0.0016)	0.1235(0.0040)	0.0185(0.0003)	128(75)	118(4)	118(2)	100
NJ-D-23	429	51	26	1.93	0.1744(0.0007)	11.2815(0.0797)	0.4690(0.0032)	2611(6)	2547(7)	2479(14)	105
NI-D-24	1	21	26	0.82	0.0500(0.0016)	0.1704(0.0049)	0.0249(0.0004)	198(106)	160(4)	159(2)	101
NJ-D-25	183	227	256	0.88	0.0535(0.0002)	0.2815(0.0025)	0.0382(0.0003)	350(14)	252(2)	241(2)	104
NJ-D-26	33	132	125	1.05	0.0465(0.0070)	0.1523(0.0238)	0.0237(0.0001)	20(330)	144(21)	151(1)	95
NJ-D-27	20	19	25	0.76	0.0540(0.0008)	0.3305(0.0046)	0.0445(0.0004)	372(64)	290(3)	281(2)	103
NJ-D-28	43	0	64	1.13	0.0506(0.0008)	0.1398(0.0020)	0.0201(0.0001)	233(37)	133(2)	128(1)	104
NJ-D-29	214	396	414	0.95	0.0506(0.0002)	0.1404(0.0008)	0.0201(0.0001)	220(11)	133(1)	129(1)	104
NJ-D-30	1521	204	143	1.42	0.1164(0.0037)	5.0668(0.0942)	0.3251(0.0059)	1902(58)	1831(16)	1815(29)	105
NJ-D-31	17	51	67	0.76	0.0525(0.0005)	0.1448(0.0015)	0.0201(0.0001)	306(22)	137(1)	128(1)	107
NJ-D-32	250	369	379	0.97	0.0514(0.0003)	0.1801(0.0014)	0.0254(0.0001)	261(8)	168(1)	162(1)	104
NJ-D-33	19	30	18	1.66	0.0503(0.0022)	0.1389(0.0064)	0.0201(0.0004)	209(102)	132(6)	128(3)	103
NJ-D-34	42	73	48	1.52	0.0496(0.0007)	0.1276(0.0017)	0.0187(0.0001)	172(31)	122(2)	120(1)	102
NJ-D-35	943	1328	989	1.33	0.0509(0.0002)	0.2044(0.0013)	0.0291(0.0001)	235(14)	189(1)	185(1)	102
NJ-D-36	32	36	29	1.26	0.0786(0.0030)	0.3932(0.0445)	0.0331(0.0005)	0(75)	337(32)	210(3)	160
NJ-D-37	36	59	60	0.97	0.0510(0.0012)	0.1308(0.0031)	0.0186(0.0002)	239(56)	125(3)	119(1)	105
NJ-D-38	466	60	65	0.92	0.1173(0.0003)	5.2467(0.0316)	0.3245(0.0019)	1915(5)	1860(5)	1812(9)	106
NJ-D-39	29	44	40	1.10	0.0500(0.0017)	0.1692(0.0050)	0.0247(0.0003)	195(106)	159(4)	157(2)	101
NJ-D-40	96	177	120	1.47	0.0498(0.0007)	0.1379(0.0019)	0.0201(0.0002)	183(31)	131(2)	128(1)	102
NJ-D-41	0	4	4	0.92	0.2579(0.0516)	3.1440(1.1425)	0.0575(0.0111)	3235(321)	1444(287)	361(68)	400
NJ-D-42	230	463	417	1.10	0.0506(0.0003)	0.1524(0.0013)	0.0219(0.0002)	220(13)	144(1)	139(1)	103
NJ-D-43	3	8	12	0.57	0.0502(0.0031)	0.1000(0.0057)	0.0150(0.0004)	211(143)	97(5)	96(2)	101
NJ-D-44	130	257	311	0.82	0.0506(0.0002)	0.1751(0.0011)	0.0251(0.0001)	233(11)	164(1)	160(1)	103
NJ-D-45	423	68	69	0.99	0.1167(0.0002)	5.2114(0.0239)	0.3240(0.0015)	1905(4)	1854(4)	1809(7)	105
NJ-D-46	60	109	131	0.83	0.0511(0.0003)	0.2229(0.0017)	0.0316(0.0002)	256(15)	204(1)	201(1)	102
NJ-D-47	36	53	44	1.19	0.0528(0.0006)	0.3234(0.0036)	0.0445(0.0003)	320(24)	284(3)	281(2)	101
NI-D-48	29	61	79	0.76	0.0532(0.0006)	0.2903(0.0030)	0.0396(0.0002)	339(19)	259(2)	250(1)	103
NJ-D-49	3	0	12	0.95	0.0512(0.0012)	0.2311(0.0063)	0.0328(0.0005)	256(54)	211(5)	208(3)	102
NJ-D-50	18	31	49	0.63	0.0546(0.0006)	0.3346(0.0035)	0.0445(0.0003)	398(24)	293(3)	281(2)	104
NJ-D-51	206	38	260	0.14	0.1067(0.0005)	4.3381(0.0787)	0.2947(0.0052)	1746(9)	1701(15)	1665(26)	105
NJ-D-52	54	243	455	0.53	0.0498(0.0006)	0.1089(0.0013)	0.0159(0.0002)	187(26)	105(1)	101(1)	103
NJ-D-53	23	7	10	0.75	0.0584(0.0026)	0.3823(0.0161)	0.0479(0.0013)	543(97)	329(12)	302(8)	109
NJ-D-54	63	127	78	1.62	0.0503(0.0012)	0.1999(0.0044)	0.0289(0.0004)	209(54)	185(4)	184(2)	101
NJ-D-55	80	81	106	0.76	0.0537(0.0003)	0.3279(0.0034)	0.0443(0.0004)	361(13)	288(3)	279(3)	103
NJ-D-56	106	237	224	1.05	0.0506(0.0003)	0.1526(0.0012)	0.0219(0.0002)	233(15)	144(1)	140(1)	103
NJ-D-57	39	47	38	1.22	0.0528(0.0006)	0.2287(0.0030)	0.0316(0.0003)	320(23)	209(3)	200(2)	104
NJ-D-58	53	47	38	1.22	0.0810(0.0017)	0.4130(0.0081)	0.0372(0.0004)	1220(37)	351(6)	235(2)	149
NJ-D-59	37834	63	131	0.48	0.1120(0.0003)	5.0017(0.0489)	0.3242(0.0034)	1832(4)	1820(8)	1810(17)	101
NJ-D-60	85	28	51	0.53	0.1343(0.0052)	0.8693(0.0475)	0.0464(0.0013)	2155(68)	635(26)	292(8)	217
NJ-D-61	139	497	989	0.50	0.0493(0.0003)	0.0908(0.0011)	0.0134(0.0002)	161(15)	88(1)	86(1)	103
NJ-D-62	8	29	20	1.47	0.0491(0.0021)	0.1251(0.0048)	0.0187(0.0004)	154(100)	120(4)	120(3)	100
NJ-D-63	122	171	59	2.91	0.0557(0.0008)	0.2844(0.0048)	0.0372(0.0006)	439(34)	254(4)	235(4)	108
NJ-D-64	46	91	67	1.35	0.0499(0.0005)	0.1373(0.0019)	0.0200(0.0002)	191(26)	131(2)	128(1)	102
NJ-D-65	37	63	70	0.89	0.0510(0.0005)	0.1763(0.0021)	0.0251(0.0002)	243(22)	165(2)	160(2)	103
NJ-D-66	67	179	211	0.84	0.0505(0.0004)	0.1396(0.0016)	0.0201(0.0002)	217(12)	133(1)	128(1)	103
NJ-D-67	136	142	56	2.52	0.0554(0.0009)	0.4134(0.0106)	0.0542(0.0013)	428(33)	351(8)	340(8)	103
NJ-D-68	49	69	52	1.33	0.0542(0.0005)	0.2944(0.0039)	0.0395(0.0005)	389(19)	262(3)	250(3)	105
NJ-D-69	826	195	117	1.65	0.1117(0.0004)	4.3492(0.0617)	0.2825(0.0043)	1828(7)	1703(12)	1604(21)	114
NI-D-70	45	114	136	0.83	0.0564(0.0005)	0.1563(0.0020)	0.0201(0.0002)	478(16)	147(2)	128(1)	115
NJ-D-71	112	311	291	1.06	0.0507(0.0003)	0.1401(0.0015)	0.0201(0.0002)	228(13)	133(1)	128(1)	104
NJ-D-72	29	58	60	0.96	0.0492(0.0008)	0.1356(0.0033)	0.0200(0.0003)	167(41)	129(3)	128(2)	101
NJ-D-73	25	50	25	1.96	0.0499(0.0019)	0.1145(0.0033)	0.0171(0.0003)	191(89)	110(3)	110(2)	100
NJ-D-74	18	25	18	1.41	0.0547(0.0015)	0.3356(0.0125)	0.0445(0.0011)	398(58)	294(10)	281(7)	105
NJ-D-75	47	110	100	1.09	0.0498(0.0005)	0.1380(0.0019)	0.0201(0.0002)	183(22)	131(2)	129(1)	102
NJ-D-76	21	48	32	1.51	0.0518(0.0013)	0.2352(0.0073)	0.0332(0.0009)	276(64)	214(6)	210(6)	102
NJ-D-77	327	38	33	1.16	0.1938(0.0007)	13.6144(0.2343)	0.5091(0.0084)	2776(6)	2723(16)	2653(36)	105
NJ-D-78	17	32	23	1.40	0.0498(0.0010)	0.1633(0.0034)	0.0241(0.0004)	183(16)	154(3)	153(2)	100
NJ-D-79	14	15	13	1.09	0.0582(0.0024)	0.2359(0.0088)	0.0301(0.0009)	600(95)	215(7)	191(5)	112
NJ-D-80	131	146	124	1.17	0.0542(0.0008)	0.3368(0.0177)	0.0449(0.0021)	389(35)	295(13)	283(13)	104
NJ-D-81	32	64	147	0.44	0.0530(0.0013)	0.1759(0.0073)	0.0240(0.0007)	332(54)	165(6)	153(4)	108
NJ-D-82	29	55	39	1.42	0.0499(0.0009)	0.1488(0.0029)	0.0218(0.0003)	187(43)	141(3)	139(2)	101
NJ-D-83	41	123	47	2.58	0.0483(0.0010)	0.1236(0.0034)	0.0187(0.0004)	122(50)	118(3)	119(2)	99
NJ-D-84	91	150	133	1.12	0.0511(0.0006)	0.1947(0.0043)	0.0276(0.0005)	256(26)	181(4)	175(3)	103
NJ-D-85	74	179	151	1.17	0.0498(0.0004)	0.1375(0.0020)	0.0201(0.0003)	183(23)	131(2)	128(2)	102
NJ-D-86	73	178	225	0.79	0.0498(0.0003)	0.1497(0.0019)	0.0218(0.0002)	183(13)	142(2)	139(2)	102
NJ-D-87	157	189	281	0.67	0.0558(0.0018)	0.2866(0.0240)	0.0374(0.0034)	456(72)	256(19)	237(21)	108
NJ-D-88	27	37	44	0.84	0.0486(0.0008)	0.1123(0.0023)	0.0168(0.0002)	128(41)	108(2)	108(1)	101
NJ-D-89	88	151	116	1.29	0.0491(0.0006)	0.1695(0.0032)	0.0251(0.0005)	154(32)	159(3)	160(3)	99
NJ-D-90	737	99	156	0.63	0.1451(0.0005)	8.3586(0.1320)	0.4187(0.0073)	2300(6)	2271(14)	2254(33)	102
NJ-D-91	74	180	186	0.96	0.0499(0.0004)	0.1376(0.0017)	0.0200(0.0002)	191(19)	131(2)	128(1)	102
NJ-D-92	58	136	74	1.81	0.0494(0.0007)	0.1052(0.0018)	0.0155(0.0002)	169(1)	102(2)	99(1)	102
NJ-D-93	272	738	381	1.92	0.0504(0.0004)	0.1390(0.0021)	0.0201(0.0003)	213(17)	132(2)	128(2)	103
NJ-D-94	174	28	26	1.07	0.1192(0.0011)	5.3258(0.1192)	0.3244(0.0074)	1946(16)	1873(18)	1811(36)	107
NJ-D-95	81	110	89	1.23	0.0543(0.0006)	0.3306(0.0065)	0.0443(0.0008)	389(19)	290(5)	279(5)	104
NJ-D-96	25	28	32	0.89	0.0510(0.0008)	0.2504(0.0049)	0.0356(0.0005)	243(35)	227(4)	225(3)	101
NJ-D-97	29	59	45	1.29	0.0510(0.0008)	0.1675(0.0031)	0.0239(0.0003)	243(37)	157(3)	152(2)	103
NJ-D-98	229	50	33	1.48	0.1150(0.0008)	5.0313(0.1116)	0.3177(0.0073)	1881(12)	1825(19)	1778(36)	106
NJ-D-99	699	144	134	1.06	0.1681(0.0010)	7.3363(0.1740)	0.3179(0.0084)	2539(10)	2153(21)	1779(41)	143
NJ-D-100	37	136	124	1.09	0.0498(0.0004)	0.1280(0.0016)	0.0186(0.0002)	187(19)	122(1)	119(1)	103

表1 嫩江河流沉积物碎屑锆石U-Pb同位素分析数据

Table 1 U-Pb isotope data of detrital zircons from the Nenjiang River sediments

测点	质量分数 (10^-6)			Th/U	同位素比值			年龄(Ma)			谐和度 (%)
测点	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb (1σ)	²⁰⁷Pb/²³⁵U (1σ)	²⁰⁶Pb/²³⁸U (1σ)	²⁰⁷Pb/ ²⁰⁶Pb(1σ)	²⁰⁷Pb/ ²³⁵U(1σ)	²⁰⁶Pb/ ²³⁸U(1σ)	谐和度 (%)
NJ-1	4	183	168	1.09	0.0537(0.0042)	0.1370(0.0098)	0.0186(0.0006)	367(178)	130(9)	119(4)	90
NJ-2	3	102	139	0.73	0.0509(0.0033)	0.1245(0.0082)	0.0177(0.0004)	235(155)	119(7)	113(3)	95
NJ-3	20	1711	932	1.84	0.0495(0.0010)	0.1526(0.0022)	0.0224(0.0003)	172(46)	144(2)	143(2)	99
NJ-4	3	172	134	1.28	0.0507(0.0024)	0.1279(0.0028)	0.0184(0.0006)	228(107)	122(3)	118(4)	96
NJ-5	4	155	212	0.73	0.0542(0.0024)	0.3077(0.0129)	0.0412(0.0004)	389(98)	272(10)	260(3)	95
NJ-6	4	225	126	1.79	0.0550(0.0074)	0.1335(0.0105)	0.0177(0.0010)	413(304)	127(9)	113(6)	88
NJ-7	3	190	169	1.12	0.0508(0.0014)	0.1286(0.0034)	0.0184(0.0002)	232(63)	123(3)	118(1)	95
NJ-8	3	58	55	1.05	0.0522(0.0020)	0.3032(0.0108)	0.0422(0.0007)	295(86)	269(8)	266(4)	99
NJ-9	10	861	551	1.56	0.0520(0.0014)	0.1336(0.0026)	0.0187(0.0002)	287(56)	127(2)	119(1)	93
NJ-10	4	290	147	1.97	0.0486(0.0027)	0.1233(0.0084)	0.0184(0.0008)	132(122)	118(8)	117(5)	99
NJ-11	2	55	59	0.93	0.0527(0.0040)	0.1315(0.0099)	0.0184(0.0006)	317(176)	125(9)	117(4)	93
NJ-12	2	99	110	0.90	0.0505(0.0023)	0.2264(0.0081)	0.0327(0.0006)	220(99)	207(7)	207(4)	99
NJ-13	6	365	242	1.51	0.0509(0.0031)	0.1260(0.0089)	0.0179(0.0005)	239(136)	121(8)	115(3)	94
NJ-14	3	63	90	0.70	0.0519(0.0026)	0.3018(0.0110)	0.0423(0.0015)	280(115)	268(9)	267(9)	99
NJ-15	9	1119	450	2.49	0.0522(0.0011)	0.1228(0.0039)	0.0170(0.0003)	295(44)	118(4)	109(2)	92
NJ-16	2	63	42	1.51	0.0490(0.0037)	0.1225(0.0095)	0.0182(0.0005)	146(176)	117(9)	116(3)	99
NJ-17	7	606	341	1.78	0.0509(0.0010)	0.1540(0.0027)	0.0220(0.0002)	235(43)	145(2)	140(1)	96
NJ-18	1	64	44	1.45	0.0500(0.0027)	0.1239(0.0063)	0.0182(0.0004)	195(126)	119(6)	116(3)	97
NJ-19	2	136	128	1.06	0.0485(0.0019)	0.1199(0.0045)	0.0180(0.0002)	124(93)	115(4)	115(1)	99
NJ-20	0	19	19	1.05	0.0500(0.0032)	0.1439(0.0086)	0.0214(0.0005)	195(153)	136(8)	136(3)	99
NJ-21	7	276	153	1.81	0.0522(0.0017)	0.1213(0.0071)	0.0168(0.0004)	295(74)	116(6)	108(3)	92
NJ-22	6	282	262	1.08	0.0524(0.0032)	0.1330(0.0087)	0.0184(0.0004))	302(136)	127(8)	118(3)	92
NJ-23	2	207	192	1.08	0.0510(0.0009)	0.1312(0.0022)	0.0187(0.0002)	239(34)	125(2)	119(1)	95
NJ-24	2	119	134	0.89	0.0498(0.0075)	0.1516(0.0146)	0.0224(0.0011)	187(315)	143(13)	143(7)	99
NJ-25	2	147	110	1.33	0.0495(0.0024)	0.1201(0.0060)	0.0177(0.0003)	169(115)	115(5)	113(2)	97
NJ-26	1	22	34	0.65	0.0512(0.0052)	0.2299(0.0290)	0.0321(0.0021)	250(215)	210(24)	204(13)	96
NJ-27	6	668	305	2.19	0.0510(0.0018)	0.1282(0.0041)	0.0183(0.0005)	243(77)	122(4)	117(3)	95
NJ-28	1	53	48	1.12	0.0497(0.0022)	0.1271(0.0051)	0.0188(0.0004)	189(104)	121(5)	120(2)	98
NJ-29	7	625	421	1.48	0.0510(0.0019)	0.1322(0.0051)	0.0188(0.0002)	243(89)	126(5)	120(1)	95
NJ-30	1	75	38	1.97	0.0502(0.0044)	0.1210(0.0092)	0.0180(0.0008)	211(183)	116(8)	115(5)	98
NJ-31	2	151	89	1.70	0.0510(0.0021)	0.1293(0.0052)	0.0186(0.0004)	243(101)	123(5)	119(3)	95
NJ-32	9	284	297	0.96	0.0542(0.0008)	0.3140(0.0047)	0.0420(0.0004)	389(31)	277(4)	265(2)	95
NJ-33	1	96	93	1.03	0.0492(0.0019)	0.1266(0.0044)	0.0188(0.0005)	167(82)	121(4)	120(3)	99
NJ-34	1	138	63	2.18	0.0500(0.0033)	0.1223(0.0078)	0.0180(0.0003)	195(152)	117(7)	115(2)	97
NJ-35	3	232	142	1.64	0.0495(0.0061)	0.1270(0.0186)	0.0185(0.0004)	172(267)	121(17)	118(3)	97
NJ-36	3	206	189	1.09	0.0509(0.0024)	0.1324(0.0053)	0.0189(0.0003)	235(107)	126(5)	121(2)	95
NJ-37	4	221	185	1.19	0.0535(0.0018)	0.3991(0.0204)	0.0540(0.0014)	350(78)	341(15)	339(8)	99
NJ-38	2	120	84	1.42	0.0492(0.0030)	0.1274(0.0053)	0.0190(0.0007)	167(145)	122(5)	121(4)	99
NJ-39	1	47	45	1.04	0.0571(0.0021)	0.5034(0.0216)	0.0639(0.0013)	494(80)	414(15)	399(8)	96
NJ-40	0	17	16	1.04	0.0520(0.0089)	0.1464(0.0220)	0.0216(0.0018)	287(352)	139(19)	138(11)	99
NJ-41	2	103	85	1.21	0.0501(0.0020)	0.1285(0.0050)	0.0188(0.0003)	198(93)	123(4)	120(2)	97
NJ-42	2	67	57	1.18	0.0495(0.0024)	0.1445(0.0070)	0.0213(0.0005)	172(115)	137(6)	136(3)	99
NJ-43	2	48	33	1.46	0.0528(0.0084)	0.1262(0.0129)	0.0182(0.0018)	320(335)	121(12)	116(12)	96
NJ-44	3	54	47	1.15	0.0542(0.0031)	0.3121(0.0165)	0.0420(0.0012)	389(130)	276(13)	265(7)	96
NJ-45	3	141	131	1.08	0.0500(0.0020)	0.1298(0.0045)	0.0189(0.0004)	195(94)	124(4)	121(3)	97
NJ-46	3	99	121	0.82	0.0498(0.0061)	0.1477(0.0134)	0.0219(0.0008)	183(272)	140(12)	140(5)	99
NJ-47	3	285	174	1.63	0.0489(0.0014)	0.1239(0.0034)	0.0184(0.0003)	143(69)	119(3)	118(2)	99
NJ-48	4	302	135	2.23	0.0485(0.0045)	0.1116(0.0077)	0.0168(0.0005)	120(207)	107(7)	107(3)	99
NJ-49	6	237	122	1.94	0.0489(0.0020)	0.1489(0.0049)	0.0221(0.0003)	146(90)	141(4)	141(2)	99
NJ-50	11	351	338	1.04	0.0534(0.0015)	0.3073(0.0127)	0.0416(0.0010)	346(61)	272(10)	263(6)	96
NJ-51	10	274	227	1.21	0.0544(0.0015)	0.3945(0.0078)	0.0526(0.0008)	391(63)	338(6)	331(5)	97
NJ-52	0	33	21	1.60	0.0530(0.0090)	0.1308(0.0194)	0.0188(0.0009)	328(348)	125(17)	120(6)	96
NJ-53	2	149	171	0.87	0.0489(0.0019)	0.1281(0.0063)	0.0190(0.0004)	143(88)	122(6)	121(3)	99
NJ-54	3	89	71	1.24	0.0499(0.0026)	0.1269(0.0111)	0.0184(0.0011)	191(124)	121(10)	118(7)	96
NJ-55	29	518	211	2.45	0.0683(0.0006)	1.1091(0.0200)	0.1178(0.0018)	876(19)	758(10)	718(11)	94
NJ-56	6	227	141	1.61	0.0484(0.0034)	0.1245(0.0085)	0.0187(0.0007)	120(156)	119(8)	120(5)	99
NJ-57	1	99	84	1.17	0.0507(0.0020)	0.1291(0.0058)	0.0185(0.0003)	233(61)	123(5)	118(2)	95
NJ-58	7	312	347	0.90	0.0520(0.0011)	0.1928(0.0041)	0.0269(0.0003)	283(46)	179(4)	171(2)	95
NJ-59	3	41	24	1.72	0.0492(0.0001)	0.1284(0.0212)	0.0189(0.0031)	167(6)	123(19)	121(20)	98
NJ-60	2	121	113	1.06	0.0515(0.0017)	0.1563(0.0053)	0.0220(0.0004)	265(76)	147(5)	140(3)	95
NJ-61	2	45	42	1.05	0.0521(0.0113)	0.2957(0.0522)	0.0415(0.0017)	300(420)	263(41)	262(11)	99
NJ-62	1	139	92	1.51	0.0506(0.0052)	0.1306(0.0090)	0.0191(0.0009)	220(222)	125(8)	122(6)	97
NJ-63	2	29	29	1.00	0.0547(0.0031)	0.3063(0.0155)	0.0413(0.0016)	467(95)	271(12)	261(10)	96
NJ-64	0	49	25	1.93	0.0509(0.0063)	0.1246(0.0130)	0.0184(0.0007)	235(263)	119(12)	118(4)	98
NJ-65	2	33	33	0.99	0.0512(0.0080)	0.1321(0.0205)	0.0189(0.0013)	250(326)	126(18)	121(8)	95
NJ-66	17	1074	368	2.92	0.0530(0.0013)	0.2357(0.0089)	0.0322(0.0007)	328(25)	215(7)	204(4)	95
NJ-67	15	750	448	1.68	0.0528(0.0030)	0.3011(0.0094)	0.0414(0.0011)	320(134)	267(7)	261(7)	97
NJ-68	2	93	81	1.14	0.0491(0.0016)	0.1227(0.0040)	0.0182(0.0001)	154(76)	117(4)	116(1)	98
NJ-69	2	84	110	0.76	0.0494(0.0023)	0.1506(0.0076)	0.0221(0.0004)	169(109)	142(7)	141(3)	98
NJ-70	4	161	151	1.06	0.0490(0.0020)	0.1264(0.0046)	0.0188(0.0003)	150(94)	121(4)	120(2)	99
NJ-71	8	786	259	3.03	0.0509(0.0025)	0.1295(0.0034)	0.0186(0.0012)	235(111)	124(3)	119(7)	95
NJ-72	3	92	106	0.87	0.0502(0.0031)	0.1274(0.0059)	0.0187(0.0005)	206(146)	122(5)	119(3)	97
NJ-73	8	578	235	2.46	0.0505(0.0037)	0.1264(0.0066)	0.0183(0.0006)	217(177)	121(6)	117(4)	96
NJ-74	4	143	139	1.03	0.0498(0.0014)	0.1278(0.0048)	0.0187(0.0007)	183(68)	122(4)	119(5)	97
NJ-75	2	104	86	1.21	0.0488(0.0027)	0.1233(0.0075)	0.0184(0.0005)	200(68)	118(7)	117(3)	99
NJ-76	3	419	280	1.50	0.0490(0.0015)	0.1258(0.0035)	0.0186(0.0004)	150(72)	120(3)	119(3)	98
NJ-77	1	93	88	1.05	0.0490(0.0050)	0.1262(0.0124)	0.0188(0.0006)	146(226)	121(11)	120(4)	99
NJ-78	28	2338	1429	1.64	0.0496(0.0045)	0.1295(0.0084)	0.0190(0.0005)	176(200)	124(8)	121(3)	98
NJ-79	9	374	260	1.44	0.0540(0.0005)	0.3166(0.0125)	0.0425(0.0014)	369(22)	279(10)	268(9)	96
NJ-80	4	121	87	1.40	0.0529(0.0001)	0.1344(0.0157)	0.0184(0.0022)	324(4)	128(14)	118(14)	91
NJ-81	3	192	126	1.53	0.0561(0.0014)	0.2430(0.0060)	0.0315(0.0004)	457(28)	221(5)	200(3)	90
NJ-82	8	353	275	1.29	0.0563(0.0008)	0.3228(0.0067)	0.0418(0.0011)	461(31)	284(5)	264(7)	92
NJ-83	12	1410	366	3.85	0.0475(0.0030)	0.1212(0.0076)	0.0185(0.0007)	76(141)	116(7)	118(4)	98
NJ-84	8	519	481	1.08	0.0507(0.0020)	0.1301(0.0075)	0.0186(0.0006)	228(58)	124(7)	119(4)	95
NJ-85	4	176	87	2.02	0.0530(0.0016)	0.3483(0.0093)	0.0478(0.0014)	328(69)	303(7)	301(8)	99
NJ-86	9	600	627	0.96	0.0473(0.0004)	0.1223(0.0024)	0.0187(0.0002)	65(14)	117(2)	120(1)	97
NJ-87	1	11	23	0.49	0.0532(0.0052)	0.2334(0.0119)	0.0327(0.0029)	339(222)	213(10)	208(18)	97
NJ-88	4	27	20	1.39	0.0509(0.0091)	0.1256(0.0211)	0.0186(0.0011)	235(376)	120(19)	119(7)	98
NJ-D-1	82	75	82	0.90	0.0520(0.0007)	0.2211(0.0036)	0.0309(0.0004)	287(31)	203(3)	196(2)	103
NJ-D-2	245	31	241	0.13	0.1151(0.0006)	4.9660(0.0382)	0.3147(0.0032)	1883(10)	1814(7)	1764(16)	107
NJ-D-3	53	69	36	1.89	0.0518(0.0009)	0.1786(0.0037)	0.0251(0.0003)	276(41)	167(3)	160(2)	105
NJ-D-4	15	29	20	1.46	0.0505(0.0012)	0.1286(0.0030)	0.0186(0.0002)	217(56)	123(3)	119(1)	103
NJ-D-5	15	19	13	1.52	0.0494(0.0013)	0.1329(0.0034)	0.0197(0.0002)	169(61)	127(3)	126(1)	101
NJ-D-6	63	149	72	2.05	0.0508(0.0007)	0.1410(0.0019)	0.0202(0.0001)	232(33)	134(2)	129(1)	104
NJ-D-7	38	26	34	0.75	0.0592(0.0005)	0.6498(0.0065)	0.0796(0.0005)	576(14)	508(4)	494(3)	103
NJ-D-8	27	47	39	1.20	0.0514(0.0007)	0.1909(0.0026)	0.0270(0.0002)	261(36)	177(2)	172(1)	103
NJ-D-9	57	164	89	1.82	0.0505(0.0005)	0.1296(0.0014)	0.0187(0.0001)	217(24)	124(1)	119(1)	104
NJ-D-10	61	75	122	0.62	0.0692(0.0008)	0.4178(0.0051)	0.0438(0.0004)	906(24)	354(4)	276(2)	128
NJ-D-11	33	73	76	0.96	0.0491(0.0006)	0.1355(0.0017)	0.0200(0.0001)	154(30)	129(2)	128(1)	101
NJ-D-12	36	104	67	1.55	0.0513(0.0005)	0.1412(0.0015)	0.0200(0.0001)	254(22)	134(1)	128(1)	105
NJ-D-13	40	105	68	1.54	0.0498(0.0006)	0.1275(0.0015)	0.0186(0.0001)	183(30)	122(1)	119(1)	102
NJ-D-14	18	62	39	1.59	0.0511(0.0008)	0.1319(0.0020)	0.0188(0.0001)	256(35)	126(2)	120(1)	105
NJ-D-15	66	214	90	2.36	0.0496(0.0005)	0.1271(0.0012)	0.0186(0.0001)	189(29)	121(1)	119(1)	102
NJ-D-16	43	104	71	1.45	0.0520(0.0007)	0.1810(0.0023)	0.0253(0.0002)	287(30)	169(2)	161(1)	105
NJ-D-17	22	74	58	1.26	0.0504(0.0009)	0.1513(0.0030)	0.0218(0.0002)	213(43)	143(3)	139(1)	103
NJ-D-18	44	147	54	2.68	0.0498(0.0009)	0.1373(0.0024)	0.0200(0.0002)	187(43)	131(2)	128(1)	102
NJ-D-19	31	39	41	0.95	0.0516(0.0019)	0.1776(0.0058)	0.0250(0.0004)	333(81)	166(5)	159(2)	104
NJ-D-20	181	211	139	1.51	0.0545(0.0003)	0.3774(0.0029)	0.0502(0.0003)	394(8)	325(2)	316(2)	103
NJ-D-21	18	78	50	1.53	0.0504(0.0007)	0.1296(0.0018)	0.0187(0.0001)	213(33)	124(2)	120(1)	104
NJ-D-22	10	55	34	1.61	0.0486(0.0016)	0.1235(0.0040)	0.0185(0.0003)	128(75)	118(4)	118(2)	100
NJ-D-23	429	51	26	1.93	0.1744(0.0007)	11.2815(0.0797)	0.4690(0.0032)	2611(6)	2547(7)	2479(14)	105
NI-D-24	1	21	26	0.82	0.0500(0.0016)	0.1704(0.0049)	0.0249(0.0004)	198(106)	160(4)	159(2)	101
NJ-D-25	183	227	256	0.88	0.0535(0.0002)	0.2815(0.0025)	0.0382(0.0003)	350(14)	252(2)	241(2)	104
NJ-D-26	33	132	125	1.05	0.0465(0.0070)	0.1523(0.0238)	0.0237(0.0001)	20(330)	144(21)	151(1)	95
NJ-D-27	20	19	25	0.76	0.0540(0.0008)	0.3305(0.0046)	0.0445(0.0004)	372(64)	290(3)	281(2)	103
NJ-D-28	43	0	64	1.13	0.0506(0.0008)	0.1398(0.0020)	0.0201(0.0001)	233(37)	133(2)	128(1)	104
NJ-D-29	214	396	414	0.95	0.0506(0.0002)	0.1404(0.0008)	0.0201(0.0001)	220(11)	133(1)	129(1)	104
NJ-D-30	1521	204	143	1.42	0.1164(0.0037)	5.0668(0.0942)	0.3251(0.0059)	1902(58)	1831(16)	1815(29)	105
NJ-D-31	17	51	67	0.76	0.0525(0.0005)	0.1448(0.0015)	0.0201(0.0001)	306(22)	137(1)	128(1)	107
NJ-D-32	250	369	379	0.97	0.0514(0.0003)	0.1801(0.0014)	0.0254(0.0001)	261(8)	168(1)	162(1)	104
NJ-D-33	19	30	18	1.66	0.0503(0.0022)	0.1389(0.0064)	0.0201(0.0004)	209(102)	132(6)	128(3)	103
NJ-D-34	42	73	48	1.52	0.0496(0.0007)	0.1276(0.0017)	0.0187(0.0001)	172(31)	122(2)	120(1)	102
NJ-D-35	943	1328	989	1.33	0.0509(0.0002)	0.2044(0.0013)	0.0291(0.0001)	235(14)	189(1)	185(1)	102
NJ-D-36	32	36	29	1.26	0.0786(0.0030)	0.3932(0.0445)	0.0331(0.0005)	0(75)	337(32)	210(3)	160
NJ-D-37	36	59	60	0.97	0.0510(0.0012)	0.1308(0.0031)	0.0186(0.0002)	239(56)	125(3)	119(1)	105
NJ-D-38	466	60	65	0.92	0.1173(0.0003)	5.2467(0.0316)	0.3245(0.0019)	1915(5)	1860(5)	1812(9)	106
NJ-D-39	29	44	40	1.10	0.0500(0.0017)	0.1692(0.0050)	0.0247(0.0003)	195(106)	159(4)	157(2)	101
NJ-D-40	96	177	120	1.47	0.0498(0.0007)	0.1379(0.0019)	0.0201(0.0002)	183(31)	131(2)	128(1)	102
NJ-D-41	0	4	4	0.92	0.2579(0.0516)	3.1440(1.1425)	0.0575(0.0111)	3235(321)	1444(287)	361(68)	400
NJ-D-42	230	463	417	1.10	0.0506(0.0003)	0.1524(0.0013)	0.0219(0.0002)	220(13)	144(1)	139(1)	103
NJ-D-43	3	8	12	0.57	0.0502(0.0031)	0.1000(0.0057)	0.0150(0.0004)	211(143)	97(5)	96(2)	101
NJ-D-44	130	257	311	0.82	0.0506(0.0002)	0.1751(0.0011)	0.0251(0.0001)	233(11)	164(1)	160(1)	103
NJ-D-45	423	68	69	0.99	0.1167(0.0002)	5.2114(0.0239)	0.3240(0.0015)	1905(4)	1854(4)	1809(7)	105
NJ-D-46	60	109	131	0.83	0.0511(0.0003)	0.2229(0.0017)	0.0316(0.0002)	256(15)	204(1)	201(1)	102
NJ-D-47	36	53	44	1.19	0.0528(0.0006)	0.3234(0.0036)	0.0445(0.0003)	320(24)	284(3)	281(2)	101
NI-D-48	29	61	79	0.76	0.0532(0.0006)	0.2903(0.0030)	0.0396(0.0002)	339(19)	259(2)	250(1)	103
NJ-D-49	3	0	12	0.95	0.0512(0.0012)	0.2311(0.0063)	0.0328(0.0005)	256(54)	211(5)	208(3)	102
NJ-D-50	18	31	49	0.63	0.0546(0.0006)	0.3346(0.0035)	0.0445(0.0003)	398(24)	293(3)	281(2)	104
NJ-D-51	206	38	260	0.14	0.1067(0.0005)	4.3381(0.0787)	0.2947(0.0052)	1746(9)	1701(15)	1665(26)	105
NJ-D-52	54	243	455	0.53	0.0498(0.0006)	0.1089(0.0013)	0.0159(0.0002)	187(26)	105(1)	101(1)	103
NJ-D-53	23	7	10	0.75	0.0584(0.0026)	0.3823(0.0161)	0.0479(0.0013)	543(97)	329(12)	302(8)	109
NJ-D-54	63	127	78	1.62	0.0503(0.0012)	0.1999(0.0044)	0.0289(0.0004)	209(54)	185(4)	184(2)	101
NJ-D-55	80	81	106	0.76	0.0537(0.0003)	0.3279(0.0034)	0.0443(0.0004)	361(13)	288(3)	279(3)	103
NJ-D-56	106	237	224	1.05	0.0506(0.0003)	0.1526(0.0012)	0.0219(0.0002)	233(15)	144(1)	140(1)	103
NJ-D-57	39	47	38	1.22	0.0528(0.0006)	0.2287(0.0030)	0.0316(0.0003)	320(23)	209(3)	200(2)	104
NJ-D-58	53	47	38	1.22	0.0810(0.0017)	0.4130(0.0081)	0.0372(0.0004)	1220(37)	351(6)	235(2)	149
NJ-D-59	37834	63	131	0.48	0.1120(0.0003)	5.0017(0.0489)	0.3242(0.0034)	1832(4)	1820(8)	1810(17)	101
NJ-D-60	85	28	51	0.53	0.1343(0.0052)	0.8693(0.0475)	0.0464(0.0013)	2155(68)	635(26)	292(8)	217
NJ-D-61	139	497	989	0.50	0.0493(0.0003)	0.0908(0.0011)	0.0134(0.0002)	161(15)	88(1)	86(1)	103
NJ-D-62	8	29	20	1.47	0.0491(0.0021)	0.1251(0.0048)	0.0187(0.0004)	154(100)	120(4)	120(3)	100
NJ-D-63	122	171	59	2.91	0.0557(0.0008)	0.2844(0.0048)	0.0372(0.0006)	439(34)	254(4)	235(4)	108
NJ-D-64	46	91	67	1.35	0.0499(0.0005)	0.1373(0.0019)	0.0200(0.0002)	191(26)	131(2)	128(1)	102
NJ-D-65	37	63	70	0.89	0.0510(0.0005)	0.1763(0.0021)	0.0251(0.0002)	243(22)	165(2)	160(2)	103
NJ-D-66	67	179	211	0.84	0.0505(0.0004)	0.1396(0.0016)	0.0201(0.0002)	217(12)	133(1)	128(1)	103
NJ-D-67	136	142	56	2.52	0.0554(0.0009)	0.4134(0.0106)	0.0542(0.0013)	428(33)	351(8)	340(8)	103
NJ-D-68	49	69	52	1.33	0.0542(0.0005)	0.2944(0.0039)	0.0395(0.0005)	389(19)	262(3)	250(3)	105
NJ-D-69	826	195	117	1.65	0.1117(0.0004)	4.3492(0.0617)	0.2825(0.0043)	1828(7)	1703(12)	1604(21)	114
NI-D-70	45	114	136	0.83	0.0564(0.0005)	0.1563(0.0020)	0.0201(0.0002)	478(16)	147(2)	128(1)	115
NJ-D-71	112	311	291	1.06	0.0507(0.0003)	0.1401(0.0015)	0.0201(0.0002)	228(13)	133(1)	128(1)	104
NJ-D-72	29	58	60	0.96	0.0492(0.0008)	0.1356(0.0033)	0.0200(0.0003)	167(41)	129(3)	128(2)	101
NJ-D-73	25	50	25	1.96	0.0499(0.0019)	0.1145(0.0033)	0.0171(0.0003)	191(89)	110(3)	110(2)	100
NJ-D-74	18	25	18	1.41	0.0547(0.0015)	0.3356(0.0125)	0.0445(0.0011)	398(58)	294(10)	281(7)	105
NJ-D-75	47	110	100	1.09	0.0498(0.0005)	0.1380(0.0019)	0.0201(0.0002)	183(22)	131(2)	129(1)	102
NJ-D-76	21	48	32	1.51	0.0518(0.0013)	0.2352(0.0073)	0.0332(0.0009)	276(64)	214(6)	210(6)	102
NJ-D-77	327	38	33	1.16	0.1938(0.0007)	13.6144(0.2343)	0.5091(0.0084)	2776(6)	2723(16)	2653(36)	105
NJ-D-78	17	32	23	1.40	0.0498(0.0010)	0.1633(0.0034)	0.0241(0.0004)	183(16)	154(3)	153(2)	100
NJ-D-79	14	15	13	1.09	0.0582(0.0024)	0.2359(0.0088)	0.0301(0.0009)	600(95)	215(7)	191(5)	112
NJ-D-80	131	146	124	1.17	0.0542(0.0008)	0.3368(0.0177)	0.0449(0.0021)	389(35)	295(13)	283(13)	104
NJ-D-81	32	64	147	0.44	0.0530(0.0013)	0.1759(0.0073)	0.0240(0.0007)	332(54)	165(6)	153(4)	108
NJ-D-82	29	55	39	1.42	0.0499(0.0009)	0.1488(0.0029)	0.0218(0.0003)	187(43)	141(3)	139(2)	101
NJ-D-83	41	123	47	2.58	0.0483(0.0010)	0.1236(0.0034)	0.0187(0.0004)	122(50)	118(3)	119(2)	99
NJ-D-84	91	150	133	1.12	0.0511(0.0006)	0.1947(0.0043)	0.0276(0.0005)	256(26)	181(4)	175(3)	103
NJ-D-85	74	179	151	1.17	0.0498(0.0004)	0.1375(0.0020)	0.0201(0.0003)	183(23)	131(2)	128(2)	102
NJ-D-86	73	178	225	0.79	0.0498(0.0003)	0.1497(0.0019)	0.0218(0.0002)	183(13)	142(2)	139(2)	102
NJ-D-87	157	189	281	0.67	0.0558(0.0018)	0.2866(0.0240)	0.0374(0.0034)	456(72)	256(19)	237(21)	108
NJ-D-88	27	37	44	0.84	0.0486(0.0008)	0.1123(0.0023)	0.0168(0.0002)	128(41)	108(2)	108(1)	101
NJ-D-89	88	151	116	1.29	0.0491(0.0006)	0.1695(0.0032)	0.0251(0.0005)	154(32)	159(3)	160(3)	99
NJ-D-90	737	99	156	0.63	0.1451(0.0005)	8.3586(0.1320)	0.4187(0.0073)	2300(6)	2271(14)	2254(33)	102
NJ-D-91	74	180	186	0.96	0.0499(0.0004)	0.1376(0.0017)	0.0200(0.0002)	191(19)	131(2)	128(1)	102
NJ-D-92	58	136	74	1.81	0.0494(0.0007)	0.1052(0.0018)	0.0155(0.0002)	169(1)	102(2)	99(1)	102
NJ-D-93	272	738	381	1.92	0.0504(0.0004)	0.1390(0.0021)	0.0201(0.0003)	213(17)	132(2)	128(2)	103
NJ-D-94	174	28	26	1.07	0.1192(0.0011)	5.3258(0.1192)	0.3244(0.0074)	1946(16)	1873(18)	1811(36)	107
NJ-D-95	81	110	89	1.23	0.0543(0.0006)	0.3306(0.0065)	0.0443(0.0008)	389(19)	290(5)	279(5)	104
NJ-D-96	25	28	32	0.89	0.0510(0.0008)	0.2504(0.0049)	0.0356(0.0005)	243(35)	227(4)	225(3)	101
NJ-D-97	29	59	45	1.29	0.0510(0.0008)	0.1675(0.0031)	0.0239(0.0003)	243(37)	157(3)	152(2)	103
NJ-D-98	229	50	33	1.48	0.1150(0.0008)	5.0313(0.1116)	0.3177(0.0073)	1881(12)	1825(19)	1778(36)	106
NJ-D-99	699	144	134	1.06	0.1681(0.0010)	7.3363(0.1740)	0.3179(0.0084)	2539(10)	2153(21)	1779(41)	143
NJ-D-100	37	136	124	1.09	0.0498(0.0004)	0.1280(0.0016)	0.0186(0.0002)	187(19)	122(1)	119(1)	103

图2 碎屑锆石CL图像(样品NJ-D) (红色为U-Pb分析点,蓝色为Hf分析点;白色数字为年龄,单位Ma)

Fig.2 CL images of detrital zircons (sample NJ-D)

图3 嫩江河漫滩沉积物碎屑锆石U-Pb年龄谐和图

Fig.3 U-Pb ages concordia of detrital zircons from the Nenjiang River floodplain sediments

图4 嫩江河漫滩沉积物碎屑锆石U-Pb年龄分布直方图与概率密度曲线

Fig.4 Histogram and probability density plot for detrital zircon U-Pb ages of the Nenjiang River floodplain sediments

表2 嫩江碎屑锆石Lu-Hf同位素组成

Table 2 Detrital zircon Lu-Hf isotope compositions of the Nenjiang River sediments

测点号	锆石年龄(Ma)	¹⁷⁶Yb/¹⁷⁷Hf(2σ)	¹⁷⁶Lu/¹⁷⁷Hf(2σ)	¹⁷⁶Hf/¹⁷⁷Hf(2σ)	ε_Hf(t)	$T D M C$ (Ma)
NJ-07	118	0.032730(0.000419)	0.000718(0.000007)	0.282828(0.000020)	4.50	885
NJ-10	117	0.157368(0.001319)	0.003479(0.000035)	0.282855(0.000032)	5.26	823
NJ-16	116	0.053218(0.000247)	0.000904(0.000003)	0.282785(0.000030)	2.95	982
NJ-18	116	0.075926(0.000331)	0.001343(0.000006)	0.282889(0.000035)	6.58	748
NJ-19	115	0.051674(0.001128)	0.000892(0.000025)	0.282862(0.000025)	5.65	809
NJ-23	119	0.065877(0.000506)	0.001406(0.000017)	0.282960(0.000024)	9.16	585
NJ-25	113	0.143935(0.002974)	0.002497(0.000038)	0.282896(0.000032)	6.69	733
NJ-27	117	0.090761(0.001463)	0.001937(0.000020)	0.282882(0.000026)	6.29	764
NJ-28	120	0.033992(0.000417)	0.000750(0.000006)	0.282885(0.000021)	6.58	754
NJ-29	120	0.068680(0.001215)	0.001413(0.000026)	0.282875(0.000024)	6.16	778
NJ-30	115	0.061531(0.001064)	0.001318(0.000015)	0.282900(0.000031)	6.95	724
NJ-31	119	0.081627(0.000883)	0.001714(0.000013)	0.282961(0.000025)	9.16	583
NJ-33	120	0.030676(0.000100)	0.000698(0.000002)	0.282898(0.000022)	7.04	725
NJ-35	118	0.118465(0.000762)	0.002514(0.000022)	0.282899(0.000025)	6.89	724
NJ-37	339	0.042523(0.000774)	0.000878(0.000015)	0.282756(0.000024)	6.69	908
NJ-41	120	0.074821(0.001057)	0.001402(0.000014)	0.282844(0.000019)	5.08	846
NJ-43	116	0.056838(0.001075)	0.001436(0.000041)	0.282818(0.000020)	4.06	909
NJ-45	121	0.072733(0.000633)	0.001709(0.000013)	0.282835(0.000020)	4.73	867
NJ-55	718	0.088233(0.000233)	0.001913(0.000010)	0.282405(0.000022)	1.93	1462
NJ-56	120	0.075837(0.001041)	0.001818(0.000018)	0.282759(0.000024)	2.02	1039
NJ-59	121	0.097512(0.000409)	0.001790(0.000013)	0.283010(0.000025)	10.93	470
NJ-64	118	0.039363(0.000545)	0.000949(0.000016)	0.282849(0.000025)	5.23	838
NJ-65	121	0.067336(0.000460)	0.001583(0.000015)	0.282847(0.000019)	5.18	840
NJ-71	119	0.509304(0.001425)	0.009209(0.000126)	0.283196(0.000036)	16.89	46
NJ-76	119	0.106907(0.001521)	0.002821(0.000036)	0.282883(0.000019)	6.31	760
NJ-80	118	0.083004(0.001039)	0.001708(0.000019)	0.282979(0.000017)	9.77	543
NJ-83	118	0.358390(0.009002)	0.007780(0.000237)	0.283213(0.000035)	17.59	8
NJ-84	119	0.066329(0.000372)	0.001496(0.000015)	0.282972(0.000026)	9.57	558
NJ-86	120	0.075673(0.000228)	0.001741(0.000005)	0.282938(0.000020)	8.34	636
NJ-87	208	0.025012(0.000902)	0.000553(0.000020)	0.282892(0.000022)	8.72	684
NJ-88	119	0.071376(0.001073)	0.001615(0.000027)	0.282890(0.000030)	6.64	745
NJ-D-05	126	0.071416(0.000619)	0.001224(0.000013)	0.282911(0.000031)	7.59	691
NJ-D-07	494	0.046082(0.000294)	0.000856(0.000002)	0.282431(0.000020)	-1.48	1544
NJ-D-11	128	0.101078(0.001022)	0.001739(0.000012)	0.282978(0.000024)	9.95	538
NJ-D-13	119	0.095065(0.000314)	0.001779(0.000014)	0.283016(0.000028)	11.08	459
NJ-D-18	128	0.133382(0.000478)	0.002195(0.000007)	0.282916(0.000033)	7.71	680
NJ-D-20	316	0.065044(0.000369)	0.001067(0.000002)	0.282865(0.000026)	10.00	676
NJ-D-24	159	0.062205(0.000380)	0.001101(0.000008)	0.282970(0.000029)	10.35	539
NJ-D-30	1902	0.062508(0.000401)	0.001037(0.000002)	0.281381(0.000022)	-8.17	2993
NJ-D-33	128	0.057320(0.008539)	0.000987(0.000003)	0.283000(0.000037)	10.80	488
NJ-D-35	185	0.382157(0.008539)	0.006773(0.000102)	0.283264(0.000041)	20.65	153
NJ-D-37	119	0.070128(0.000205)	0.001164(0.000001)	0.282901(0.000035)	7.06	720
NJ-D-42	139	0.040356(0.000040)	0.000676(0.000001)	0.282869(0.000022)	6.44	778
NJ-D-48	250	0.030679(0.000188)	0.000585(0.000003)	0.282425(0.000026)	-6.87	1707
NJ-D-49	208	0.046690(0.000079)	0.000837(0.000003)	0.282825(0.000034)	6.32	835
NJ-D-50	281	0.069303(0.000217)	0.001174(0.000005)	0.282933(0.000031)	11.66	543
NJ-D-51	1746	0.004890(0.000215)	0.000084(0.000004)	0.281542(0.000021)	-4.76	2735
NJ-D-54	184	0.136684(0.004217)	0.002539(0.000073)	0.282930(0.000033)	9.31	613
NJ-D-59	1832	0.020238(0.000584)	0.000341(0.000009)	0.281442(0.000022)	-6.67	2901
NJ-D-61	86	0.124682(0.000922)	0.002141(0.000008)	0.282940(0.000025)	7.69	652
NJ-D-62	120	0.058337(0.000474)	0.001071)(0.000005)	0.282805(0.000033)	3.71	935
NJ-D-65	160	0.035812(0.000150)	0.000632(0.000001)	0.282912(0.000031)	8.40	668
NJ-D-73	110	0.105028(0.000608)	0.001750(0.000001)	0.282967(0.000041)	9.17	575
NJ-D-75	129	0.030787(0.000283)	0.000508(0.000002)	0.282773(0.000029)	2.81	1002
NJ-D-78	153	0.019994(0.000561)	0.000353(0.000008)	0.282556(0.000026)	-4.31	1473
NJ-D-80	283	0.176350(0.008070)	0.002866(0.000129)	0.282927(0.000048)	11.16	557
NJ-D-83	119	0.230327(0.001490)	0.003440(0.000031)	0.282922(0.000042)	7.65	671
NJ-D-85	128	0.030803(0.000456)	0.000480(0.000005)	0.282812(0.000029)	4.18	915
NJ-D-88	108	0.137407(0.000753)	0.002160(0.000011)	0.283038(0.000039)	11.63	414
NJ-D-89	160	0.129446(0.000771)	0.002033(0.000017)	0.282941(0.000028)	9.26	603
NJ-D-90	2300	0.049999(0.001285)	0.000795(0.000017)	0.281366(0.000023)	0.50	2754
NJ-D-96	225	0.031706(0.000325)	0.000475(0.000002)	0.282933(0.000025)	10.56	580

表2 嫩江碎屑锆石Lu-Hf同位素组成

Table 2 Detrital zircon Lu-Hf isotope compositions of the Nenjiang River sediments

测点号	锆石年龄(Ma)	¹⁷⁶Yb/¹⁷⁷Hf(2σ)	¹⁷⁶Lu/¹⁷⁷Hf(2σ)	¹⁷⁶Hf/¹⁷⁷Hf(2σ)	ε_Hf(t)	$T D M C$ (Ma)
NJ-07	118	0.032730(0.000419)	0.000718(0.000007)	0.282828(0.000020)	4.50	885
NJ-10	117	0.157368(0.001319)	0.003479(0.000035)	0.282855(0.000032)	5.26	823
NJ-16	116	0.053218(0.000247)	0.000904(0.000003)	0.282785(0.000030)	2.95	982
NJ-18	116	0.075926(0.000331)	0.001343(0.000006)	0.282889(0.000035)	6.58	748
NJ-19	115	0.051674(0.001128)	0.000892(0.000025)	0.282862(0.000025)	5.65	809
NJ-23	119	0.065877(0.000506)	0.001406(0.000017)	0.282960(0.000024)	9.16	585
NJ-25	113	0.143935(0.002974)	0.002497(0.000038)	0.282896(0.000032)	6.69	733
NJ-27	117	0.090761(0.001463)	0.001937(0.000020)	0.282882(0.000026)	6.29	764
NJ-28	120	0.033992(0.000417)	0.000750(0.000006)	0.282885(0.000021)	6.58	754
NJ-29	120	0.068680(0.001215)	0.001413(0.000026)	0.282875(0.000024)	6.16	778
NJ-30	115	0.061531(0.001064)	0.001318(0.000015)	0.282900(0.000031)	6.95	724
NJ-31	119	0.081627(0.000883)	0.001714(0.000013)	0.282961(0.000025)	9.16	583
NJ-33	120	0.030676(0.000100)	0.000698(0.000002)	0.282898(0.000022)	7.04	725
NJ-35	118	0.118465(0.000762)	0.002514(0.000022)	0.282899(0.000025)	6.89	724
NJ-37	339	0.042523(0.000774)	0.000878(0.000015)	0.282756(0.000024)	6.69	908
NJ-41	120	0.074821(0.001057)	0.001402(0.000014)	0.282844(0.000019)	5.08	846
NJ-43	116	0.056838(0.001075)	0.001436(0.000041)	0.282818(0.000020)	4.06	909
NJ-45	121	0.072733(0.000633)	0.001709(0.000013)	0.282835(0.000020)	4.73	867
NJ-55	718	0.088233(0.000233)	0.001913(0.000010)	0.282405(0.000022)	1.93	1462
NJ-56	120	0.075837(0.001041)	0.001818(0.000018)	0.282759(0.000024)	2.02	1039
NJ-59	121	0.097512(0.000409)	0.001790(0.000013)	0.283010(0.000025)	10.93	470
NJ-64	118	0.039363(0.000545)	0.000949(0.000016)	0.282849(0.000025)	5.23	838
NJ-65	121	0.067336(0.000460)	0.001583(0.000015)	0.282847(0.000019)	5.18	840
NJ-71	119	0.509304(0.001425)	0.009209(0.000126)	0.283196(0.000036)	16.89	46
NJ-76	119	0.106907(0.001521)	0.002821(0.000036)	0.282883(0.000019)	6.31	760
NJ-80	118	0.083004(0.001039)	0.001708(0.000019)	0.282979(0.000017)	9.77	543
NJ-83	118	0.358390(0.009002)	0.007780(0.000237)	0.283213(0.000035)	17.59	8
NJ-84	119	0.066329(0.000372)	0.001496(0.000015)	0.282972(0.000026)	9.57	558
NJ-86	120	0.075673(0.000228)	0.001741(0.000005)	0.282938(0.000020)	8.34	636
NJ-87	208	0.025012(0.000902)	0.000553(0.000020)	0.282892(0.000022)	8.72	684
NJ-88	119	0.071376(0.001073)	0.001615(0.000027)	0.282890(0.000030)	6.64	745
NJ-D-05	126	0.071416(0.000619)	0.001224(0.000013)	0.282911(0.000031)	7.59	691
NJ-D-07	494	0.046082(0.000294)	0.000856(0.000002)	0.282431(0.000020)	-1.48	1544
NJ-D-11	128	0.101078(0.001022)	0.001739(0.000012)	0.282978(0.000024)	9.95	538
NJ-D-13	119	0.095065(0.000314)	0.001779(0.000014)	0.283016(0.000028)	11.08	459
NJ-D-18	128	0.133382(0.000478)	0.002195(0.000007)	0.282916(0.000033)	7.71	680
NJ-D-20	316	0.065044(0.000369)	0.001067(0.000002)	0.282865(0.000026)	10.00	676
NJ-D-24	159	0.062205(0.000380)	0.001101(0.000008)	0.282970(0.000029)	10.35	539
NJ-D-30	1902	0.062508(0.000401)	0.001037(0.000002)	0.281381(0.000022)	-8.17	2993
NJ-D-33	128	0.057320(0.008539)	0.000987(0.000003)	0.283000(0.000037)	10.80	488
NJ-D-35	185	0.382157(0.008539)	0.006773(0.000102)	0.283264(0.000041)	20.65	153
NJ-D-37	119	0.070128(0.000205)	0.001164(0.000001)	0.282901(0.000035)	7.06	720
NJ-D-42	139	0.040356(0.000040)	0.000676(0.000001)	0.282869(0.000022)	6.44	778
NJ-D-48	250	0.030679(0.000188)	0.000585(0.000003)	0.282425(0.000026)	-6.87	1707
NJ-D-49	208	0.046690(0.000079)	0.000837(0.000003)	0.282825(0.000034)	6.32	835
NJ-D-50	281	0.069303(0.000217)	0.001174(0.000005)	0.282933(0.000031)	11.66	543
NJ-D-51	1746	0.004890(0.000215)	0.000084(0.000004)	0.281542(0.000021)	-4.76	2735
NJ-D-54	184	0.136684(0.004217)	0.002539(0.000073)	0.282930(0.000033)	9.31	613
NJ-D-59	1832	0.020238(0.000584)	0.000341(0.000009)	0.281442(0.000022)	-6.67	2901
NJ-D-61	86	0.124682(0.000922)	0.002141(0.000008)	0.282940(0.000025)	7.69	652
NJ-D-62	120	0.058337(0.000474)	0.001071)(0.000005)	0.282805(0.000033)	3.71	935
NJ-D-65	160	0.035812(0.000150)	0.000632(0.000001)	0.282912(0.000031)	8.40	668
NJ-D-73	110	0.105028(0.000608)	0.001750(0.000001)	0.282967(0.000041)	9.17	575
NJ-D-75	129	0.030787(0.000283)	0.000508(0.000002)	0.282773(0.000029)	2.81	1002
NJ-D-78	153	0.019994(0.000561)	0.000353(0.000008)	0.282556(0.000026)	-4.31	1473
NJ-D-80	283	0.176350(0.008070)	0.002866(0.000129)	0.282927(0.000048)	11.16	557
NJ-D-83	119	0.230327(0.001490)	0.003440(0.000031)	0.282922(0.000042)	7.65	671
NJ-D-85	128	0.030803(0.000456)	0.000480(0.000005)	0.282812(0.000029)	4.18	915
NJ-D-88	108	0.137407(0.000753)	0.002160(0.000011)	0.283038(0.000039)	11.63	414
NJ-D-89	160	0.129446(0.000771)	0.002033(0.000017)	0.282941(0.000028)	9.26	603
NJ-D-90	2300	0.049999(0.001285)	0.000795(0.000017)	0.281366(0.000023)	0.50	2754
NJ-D-96	225	0.031706(0.000325)	0.000475(0.000002)	0.282933(0.000025)	10.56	580

图5 嫩江河漫滩沉积物碎屑锆石εHf(t)-年龄关系图 DM.亏损地幔;CHUR. 球粒陨石

Fig.5 Detrital zircon εHf(t) vs U-Pb age plot for the Nenjiang River floodplain sediments

图6 嫩江河漫滩沉积物碎屑锆石Hf亏损地幔模式年龄分布直方图

Fig.6 Histogram of detrital zircon Hf model ages of the Nenjiang River floodplain sediments

图7 嫩江河漫滩沉积物物源对比图

Fig.7 Provenance comparison plots for the Nenjiang River floodplain sediments

图8 嫩江沉积物不同时代碎屑锆石U-Pb年龄分布 (嫩江下游由NJ、NJ-D和NJ01组成)

Fig.8 Detrital zircon U-Pb age statistics for the Nenjiang River sediments of different periods

图9 嫩江河漫滩沉积物碎屑锆石U-Pb年龄与Hf亏损地幔模式年龄累积概率曲线

Fig.9 Cumulative probability curves for detrital zircon U-Pb age and Hf model age of the Nenjiang River floodplain sediments

图10 嫩江河漫滩沉积物源区地壳各时段重熔率

Fig.10 Remelting rate for each period of the Nenjiang River floodplain sediment source region

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