大兴安岭北段阿里河镇早白垩世高分异花岗岩的确定及其地质意义

doi:10.19657/j.geoscience.1000-8527.2021.053

摘要/Abstract

摘要：

大兴安岭广泛出露中生代花岗岩,本文选择大兴安岭北段阿里河镇岩体进行锆石U-Pb年代学和地球化学研究,通过对比大兴安岭北段、中南段和华南等地中生代花岗岩的地球化学特征,探讨岩石成因和产出的大地构造环境。2件花岗岩样品的锆石U-Pb定年结果分别是(134.6±1.5) Ma和(134.4±1.0) Ma,表明岩石的侵入时代应为早白垩世。阿里河镇岩体主要岩石组合为二长花岗岩-正长花岗岩-碱长花岗岩,暗色矿物含量普遍较低,发育晶洞构造。野外调查可见白岗岩和细晶岩出现,且在花岗岩体边部发育伟晶岩脉。该岩体在化学组成上具有高硅(73.63%~77.81%),富碱(Na₂O+K₂O=7.78%~8.97%),高分异指数DI(91.71~96.80)、过铝质(A/CNK=1.01~1.11)和贫钙、镁的特征,富集大离子亲石元素Rb、Th、U和K,亏损高场强元素Nb、Ta、P和Ti。其微量元素Zr/Hf比值与Zr含量呈正相关,Nb/Ta比值与Ta含量呈负相关,上述变化特征与华南高分异花岗岩类似。综合地质和地球化学特征认为阿里河镇岩体应为高分异I型花岗岩,其动力学背景可能为与蒙古—鄂霍次克洋闭合导致的后碰撞环境有关。

关键词: 高分异花岗岩, 伟晶岩, 晶洞构造, 早白垩世, 阿里河镇岩体

Abstract:

There are voluminous Mesozoic granitic rocks in the Great Xing’an Range. In this study, zircon U-Pb geochronology and geochemistry of the Alihe granites in the northern Great Xing’an Range were analyzed, and were compared with the Mesozoic granites in the northern, middle and southern Great Xing’an Range and South China. The petrogenesis and tectonic setting of the Alihe granites were then discussed. Zircon U-Pb dating on two granite samples yielded Early Cretaceous ages (134.6±1.5 Ma and 134.4±1.0 Ma). The Alihe granites are mainly composed of monzogranite, syenogranite, and alkali-feldspar granites, which contain few mafic mi-nerals and miarolitic cavities. Alaskite and aplite were found in the field investigation route and pegmatite veins were found on the granitic pluton margin. Chemically, these plutons are peraluminous (A/CNK=1.01-1.11) and show high contents of SiO₂ (73.63%-77.81%), alkalis (Na₂O+K₂O=7.78%-8.97%), and DI (91.71-96.80), and low Ca and Mg contents. They are also enriched in Rb, Th, U, K, but depleted in Nb, Ta, P, Ti. The varying Zr/Hf and Nb/Ta ratios resemble highly-fractionated granites in South China. Integrating geological and geochemical data, we suggested that the Alihe plutons are highly fractionated I-type granites, which were formed in a post-orogenic extension setting after the Mongolia-Okhotsk Ocean closure.

Key words: highly-fractionated granite, miarolitic cavity, Early Cretaceous, Alihe pluton

中图分类号:

徐立明, 刘涛, 郑吉林. 大兴安岭北段阿里河镇早白垩世高分异花岗岩的确定及其地质意义[J]. 现代地质, 2023, 37(03): 613-626.

XU Liming, LIU Tao, ZHENG Jilin. Identification and Significance of Early Cretaceous Highly Fractionated Alihe Granites, Northern Great Xing’an Range[J]. Geoscience, 2023, 37(03): 613-626.

图/表 12

参考文献 71

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测点	Pb (10^-6)	U (10^-6)	Th/U	同位素比值						年龄(Ma)
测点	Pb (10^-6)	U (10^-6)	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
Hb170248-1	3	130	0.87	0.0217	0.0002	0.1506	0.0093	0.0503	0.0030	139	2	142	9	207	137
Hb170248-2	3	107	0.64	0.0225	0.0002	0.1527	0.0095	0.0493	0.0033	143	2	144	9	163	154
Hb170248-3	4	154	0.73	0.0218	0.0002	0.1516	0.0062	0.0503	0.0020	139	1	143	6	211	93
Hb170248-4	4	160	0.64	0.0223	0.0002	0.1573	0.0057	0.0512	0.0018	142	1	148	5	252	83
Hb170248-5	4	190	0.56	0.0212	0.0002	0.1451	0.0109	0.0496	0.0036	135	1	138	10	178	168
Hb170248-6	3	129	0.67	0.0215	0.0002	0.1521	0.0102	0.0513	0.0034	137	1	144	10	256	154
Hb170248-7	7	290	0.61	0.0211	0.0002	0.1504	0.0047	0.0518	0.0015	134	1	142	4	277	68
Hb170248-8	8	343	0.62	0.0210	0.0002	0.1527	0.0053	0.0527	0.0018	134	1	144	5	318	79
Hb170248-9	3	117	0.70	0.0212	0.0002	0.1491	0.0146	0.0511	0.0049	135	2	141	14	246	219
Hb170248-10	7	290	0.67	0.0214	0.0002	0.1516	0.0058	0.0514	0.0019	137	1	143	5	257	85
Hb170248-11	4	190	0.69	0.0212	0.0002	0.1521	0.0045	0.0520	0.0015	135	1	144	4	284	67
Hb170248-12	5	241	0.74	0.0207	0.0002	0.1496	0.0042	0.0524	0.0014	132	1	142	4	302	61
Hb170248-13	4	154	0.63	0.0211	0.0002	0.1486	0.0062	0.0511	0.0020	135	1	141	6	246	92
Hb170248-14	7	286	0.88	0.0204	0.0002	0.1498	0.0038	0.0533	0.0013	130	1	142	4	343	55
Hb170248-15	6	268	0.47	0.0206	0.0002	0.1457	0.0048	0.0514	0.0016	131	1	138	5	260	73
Hb170248-16	1	49	0.65	0.0213	0.0003	0.1510	0.0211	0.0514	0.0069	136	2	143	20	259	308
Hb170248-17	3	140	0.64	0.0210	0.0002	0.1512	0.0074	0.0521	0.0025	134	1	143	7	291	109
Hb170248-18	5	223	0.72	0.0206	0.0002	0.1472	0.0082	0.0518	0.0028	132	1	139	8	276	124
Hb170248-19	4	158	0.57	0.0208	0.0002	0.1477	0.0063	0.0515	0.0022	133	1	140	6	264	98
Hb170248-20	6	275	0.47	0.0207	0.0002	0.1476	0.0040	0.0518	0.0013	132	1	140	4	277	59
Hb170248-21	6	266	0.49	0.0204	0.0002	0.1476	0.0053	0.0526	0.0018	130	1	140	5	310	80
Hb170248-22	5	240	0.65	0.0207	0.0002	0.1444	0.0052	0.0507	0.0018	132	1	137	5	226	82
Hb170248-23	3	114	0.56	0.0214	0.0002	0.1451	0.0087	0.0492	0.0029	136	2	138	8	157	138
Hb170249-1	6	214	1.12	0.0218	0.0002	0.1516	0.0074	0.0504	0.0025	139	1	143	7	212	114
Hb170249-2	8	341	0.64	0.0211	0.0002	0.1509	0.0039	0.0519	0.0013	135	1	143	4	281	59
Hb170249-3	9	374	0.72	0.0211	0.0002	0.1429	0.0048	0.0491	0.0016	135	2	136	5	152	79
Hb170249-4	3	129	0.52	0.0213	0.0002	0.1505	0.0103	0.0513	0.0035	136	1	142	10	253	157
Hb170249-5	7	275	0.88	0.0214	0.0002	0.1486	0.0038	0.0504	0.0012	137	1	141	4	212	57
Hb170249-6	3	140	0.99	0.0210	0.0002	0.1510	0.0082	0.0521	0.0027	134	1	143	8	288	118
Hb170249-7	5	200	1.34	0.0212	0.0002	0.1517	0.0042	0.0519	0.0014	135	1	143	4	283	62
Hb170249-8	4	154	0.87	0.0210	0.0002	0.1547	0.0057	0.0534	0.0019	134	1	146	5	345	81
Hb170249-9	6	123	0.00	0.0472	0.0005	0.4288	0.0097	0.0659	0.0014	297	3	362	8	802	43
Hb170249-10	5	203	0.66	0.0209	0.0002	0.1545	0.0073	0.0535	0.0025	134	1	146	7	350	106
Hb170249-11	2	88	1.02	0.0202	0.0002	0.1495	0.0161	0.0536	0.0057	129	2	141	15	354	239
Hb170249-12	5	238	0.54	0.0207	0.0002	0.1452	0.0043	0.0509	0.0014	132	1	138	4	238	66
Hb170249-13	3	134	0.78	0.0217	0.0002	0.1525	0.0160	0.0510	0.0052	138	2	144	15	240	233
Hb170249-14	6	240	0.52	0.0215	0.0002	0.1467	0.0058	0.0495	0.0020	137	2	139	6	172	93
Hb170249-15	4	184	0.77	0.0210	0.0002	0.1524	0.0051	0.0527	0.0017	134	1	144	5	315	72
Hb170249-16	0	0	0.00	0.0205	0.0002	0.1463	0.0048	0.0517	0.0017	131	1	139	5	270	74
Hb170249-17	2	92	0.60	0.0207	0.0002	0.1546	0.0112	0.0541	0.0040	132	1	146	11	376	167
Hb170249-18	3	64	0.00	0.0484	0.0005	0.3782	0.0152	0.0567	0.0022	305	3	326	13	480	87
Hb170249-19	3	119	0.70	0.0211	0.0002	0.1552	0.0073	0.0533	0.0024	135	2	147	7	344	101
Hb170249-20	4	177	0.61	0.0212	0.0002	0.1562	0.0058	0.0534	0.0019	135	1	147	5	347	82
Hb170249-21	6	266	1.00	0.0214	0.0002	0.1456	0.0038	0.0494	0.0013	136	1	138	4	167	59
Hb170249-22	3	146	0.59	0.0211	0.0002	0.1522	0.0081	0.0523	0.0028	135	1	144	8	300	121
Hb170249-23	3	114	0.70	0.0212	0.0002	0.1555	0.0119	0.0532	0.0040	135	1	147	11	339	171
Hb170249-24	6	263	0.86	0.0205	0.0002	0.1517	0.0070	0.0537	0.0023	131	1	143	7	357	96

测点	Pb (10^-6)	U (10^-6)	Th/U	同位素比值						年龄(Ma)
测点	Pb (10^-6)	U (10^-6)	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
Hb170248-1	3	130	0.87	0.0217	0.0002	0.1506	0.0093	0.0503	0.0030	139	2	142	9	207	137
Hb170248-2	3	107	0.64	0.0225	0.0002	0.1527	0.0095	0.0493	0.0033	143	2	144	9	163	154
Hb170248-3	4	154	0.73	0.0218	0.0002	0.1516	0.0062	0.0503	0.0020	139	1	143	6	211	93
Hb170248-4	4	160	0.64	0.0223	0.0002	0.1573	0.0057	0.0512	0.0018	142	1	148	5	252	83
Hb170248-5	4	190	0.56	0.0212	0.0002	0.1451	0.0109	0.0496	0.0036	135	1	138	10	178	168
Hb170248-6	3	129	0.67	0.0215	0.0002	0.1521	0.0102	0.0513	0.0034	137	1	144	10	256	154
Hb170248-7	7	290	0.61	0.0211	0.0002	0.1504	0.0047	0.0518	0.0015	134	1	142	4	277	68
Hb170248-8	8	343	0.62	0.0210	0.0002	0.1527	0.0053	0.0527	0.0018	134	1	144	5	318	79
Hb170248-9	3	117	0.70	0.0212	0.0002	0.1491	0.0146	0.0511	0.0049	135	2	141	14	246	219
Hb170248-10	7	290	0.67	0.0214	0.0002	0.1516	0.0058	0.0514	0.0019	137	1	143	5	257	85
Hb170248-11	4	190	0.69	0.0212	0.0002	0.1521	0.0045	0.0520	0.0015	135	1	144	4	284	67
Hb170248-12	5	241	0.74	0.0207	0.0002	0.1496	0.0042	0.0524	0.0014	132	1	142	4	302	61
Hb170248-13	4	154	0.63	0.0211	0.0002	0.1486	0.0062	0.0511	0.0020	135	1	141	6	246	92
Hb170248-14	7	286	0.88	0.0204	0.0002	0.1498	0.0038	0.0533	0.0013	130	1	142	4	343	55
Hb170248-15	6	268	0.47	0.0206	0.0002	0.1457	0.0048	0.0514	0.0016	131	1	138	5	260	73
Hb170248-16	1	49	0.65	0.0213	0.0003	0.1510	0.0211	0.0514	0.0069	136	2	143	20	259	308
Hb170248-17	3	140	0.64	0.0210	0.0002	0.1512	0.0074	0.0521	0.0025	134	1	143	7	291	109
Hb170248-18	5	223	0.72	0.0206	0.0002	0.1472	0.0082	0.0518	0.0028	132	1	139	8	276	124
Hb170248-19	4	158	0.57	0.0208	0.0002	0.1477	0.0063	0.0515	0.0022	133	1	140	6	264	98
Hb170248-20	6	275	0.47	0.0207	0.0002	0.1476	0.0040	0.0518	0.0013	132	1	140	4	277	59
Hb170248-21	6	266	0.49	0.0204	0.0002	0.1476	0.0053	0.0526	0.0018	130	1	140	5	310	80
Hb170248-22	5	240	0.65	0.0207	0.0002	0.1444	0.0052	0.0507	0.0018	132	1	137	5	226	82
Hb170248-23	3	114	0.56	0.0214	0.0002	0.1451	0.0087	0.0492	0.0029	136	2	138	8	157	138
Hb170249-1	6	214	1.12	0.0218	0.0002	0.1516	0.0074	0.0504	0.0025	139	1	143	7	212	114
Hb170249-2	8	341	0.64	0.0211	0.0002	0.1509	0.0039	0.0519	0.0013	135	1	143	4	281	59
Hb170249-3	9	374	0.72	0.0211	0.0002	0.1429	0.0048	0.0491	0.0016	135	2	136	5	152	79
Hb170249-4	3	129	0.52	0.0213	0.0002	0.1505	0.0103	0.0513	0.0035	136	1	142	10	253	157
Hb170249-5	7	275	0.88	0.0214	0.0002	0.1486	0.0038	0.0504	0.0012	137	1	141	4	212	57
Hb170249-6	3	140	0.99	0.0210	0.0002	0.1510	0.0082	0.0521	0.0027	134	1	143	8	288	118
Hb170249-7	5	200	1.34	0.0212	0.0002	0.1517	0.0042	0.0519	0.0014	135	1	143	4	283	62
Hb170249-8	4	154	0.87	0.0210	0.0002	0.1547	0.0057	0.0534	0.0019	134	1	146	5	345	81
Hb170249-9	6	123	0.00	0.0472	0.0005	0.4288	0.0097	0.0659	0.0014	297	3	362	8	802	43
Hb170249-10	5	203	0.66	0.0209	0.0002	0.1545	0.0073	0.0535	0.0025	134	1	146	7	350	106
Hb170249-11	2	88	1.02	0.0202	0.0002	0.1495	0.0161	0.0536	0.0057	129	2	141	15	354	239
Hb170249-12	5	238	0.54	0.0207	0.0002	0.1452	0.0043	0.0509	0.0014	132	1	138	4	238	66
Hb170249-13	3	134	0.78	0.0217	0.0002	0.1525	0.0160	0.0510	0.0052	138	2	144	15	240	233
Hb170249-14	6	240	0.52	0.0215	0.0002	0.1467	0.0058	0.0495	0.0020	137	2	139	6	172	93
Hb170249-15	4	184	0.77	0.0210	0.0002	0.1524	0.0051	0.0527	0.0017	134	1	144	5	315	72
Hb170249-16	0	0	0.00	0.0205	0.0002	0.1463	0.0048	0.0517	0.0017	131	1	139	5	270	74
Hb170249-17	2	92	0.60	0.0207	0.0002	0.1546	0.0112	0.0541	0.0040	132	1	146	11	376	167
Hb170249-18	3	64	0.00	0.0484	0.0005	0.3782	0.0152	0.0567	0.0022	305	3	326	13	480	87
Hb170249-19	3	119	0.70	0.0211	0.0002	0.1552	0.0073	0.0533	0.0024	135	2	147	7	344	101
Hb170249-20	4	177	0.61	0.0212	0.0002	0.1562	0.0058	0.0534	0.0019	135	1	147	5	347	82
Hb170249-21	6	266	1.00	0.0214	0.0002	0.1456	0.0038	0.0494	0.0013	136	1	138	4	167	59
Hb170249-22	3	146	0.59	0.0211	0.0002	0.1522	0.0081	0.0523	0.0028	135	1	144	8	300	121
Hb170249-23	3	114	0.70	0.0212	0.0002	0.1555	0.0119	0.0532	0.0040	135	1	147	11	339	171
Hb170249-24	6	263	0.86	0.0205	0.0002	0.1517	0.0070	0.0537	0.0023	131	1	143	7	357	96

样品号	Hb170230	Hb170246	Hb170249	Hb170264	WJE078	Hb170234	Hb170263		Hb170229		Hb170248	Hb170265
岩性	中粗粒黑云母正长花岗岩	似斑状细中粒正长花岗岩	细中粒正长花岗岩	中细粒正长花岗岩	似斑状细粒碱长花岗岩	似斑状中细粒黑云母二长花岗岩	中粗粒花岗岩		似斑状细中粒二长花岗岩		细中粒黑云母二长花岗岩	细中粒二长花岗岩
SiO₂	76.22	73.63	75.60	77.81	74.58	74.41	74.11	74.09		75.45		76.70
Al₂O₃	12.66	14.03	13.25	12.26	13.54	13.64	13.80	13.90		13.29		12.71
TiO₂	0.21	0.21	0.13	0.10	0.19	0.22	0.22	0.23		0.13		0.12
Fe₂O₃	0.83	0.85	0.58	0.41	0.88	0.89	0.87	0.78		0.59		0.50
FeO	0.42	0.42	0.33	0.19	0.45	0.49	0.44	0.53		0.30		0.29
CaO	0.80	0.88	0.36	0.38	0.36	0.98	0.76	1.02		0.59		0.54
MgO	0.40	0.38	0.22	0.14	0.40	0.49	0.37	0.45		0.24		0.21
K₂O	3.58	4.31	4.45	4.22	4.36	3.55	4.25	3.92		4.41		4.15
Na₂O	4.20	4.55	4.53	4.12	4.11	4.61	4.38	4.39		4.44		4.30
MnO	0.053	0.064	0.071	0.051	0.060	0.060	0.046	0.034		0.067		0.056
P₂O₅	0.058	0.057	0.031	0.018	0.070	0.068	0.062	0.069		0.036		0.041
H₂O⁺	0.36	0.30	0.24	0.14	0.63	0.37	0.45	0.31		0.15		0.14
H₂O^-	0.22	0.16	0.17	0.17	0.41	0.18	0.24	0.30		0.16		0.16
烧失量	0.47	0.51	0.36	0.24	0.87	0.47	0.55	0.45		0.36		0.30
总量	99.91	99.89	99.92	99.94	99.87	99.89	99.88	99.87		99.91		99.92
Mg^#	37.97	36.62	32.16	31.36	36.51	40.48	35.28	39.60		33.91		34.29
DI	93.16	92.92	96.21	96.80	94.33	91.90	93.17	91.71		95.30		95.73
A/CNK	1.03	1.02	1.02	1.02	1.11	1.03	1.04	1.04		1.01		1.01
A/NK	1.17	1.15	1.08	1.08	1.18	1.19	1.17	1.21		1.10		1.10
σ	1.82	2.56	2.47	2.00	2.27	2.12	2.39	2.22		2.42		2.12
K₂O/Na₂O	0.85	0.95	0.98	1.02	1.06	0.77	0.97	0.89		0.99		0.97
FeO^T/MgO	2.94	3.12	3.80	3.94	3.13	2.65	3.30	2.75		3.51		3.45
K₂O+Na₂O	7.78	8.86	8.97	8.34	8.47	8.17	8.63	8.31		8.85		8.46
(K₂O+Na₂O) /CaO	9.70	10.03	24.64	22.08	23.69	8.35	11.33	8.11		15.12		15.80
Sc	1.51	2.25	2.03	1.01	1.57	2.04	1.23	1.18		1.14		1.13
V	11.90	12.60	5.78	2.37	12.40	15.10	12.30	15.30		5.27		4.02
Cr	2.80	2.41	1.52	1.69	4.29	4.20	1.65	4.63		1.86		2.25
Co	1.61	2.13	0.79	0.38	2.99	2.42	1.80	2.10		0.76		0.77
Ni	0.77	1.58	0.33	0.58	2.41	2.79	0.62	2.35		0.66		0.77
Ga	16.7	18.3	17.7	13.7	14.9	16.6	17.7	18.0		16.6		14.9
Rb	100	138	117	112	108	112	108	128		114		104
Sr	198.0	241.0	102.0	47.9	214.0	273.0	193.0	345.0		105.0		87.1
Zr	73.7	67.5	80.5	99.5	85.7	72.3	102.0	91.0		62.5		79.0
Nb	10.20	12.30	13.20	13.00	9.64	10.20	10.40	8.86		12.30		11.20
Cs	2.17	2.55	2.38	2.21	2.53	3.84	2.43	4.08		2.43		2.61
Ba	452	522	386	223	591	445	648	586		472		314
Hf	2.54	3.10	3.39	4.18	3.14	3.02	3.51	3.49		2.95		2.92
Ta	0.82	0.98	0.83	0.94	0.85	0.88	0.78	0.72		0.89		0.75
Pb	22.4	28.1	26.8	26.3	16.7	27.0	20.7	27.6		28.0		24.0
Th	15.70	15.90	11.80	8.60	10.20	15.10	10.30	15.50		8.91		7.60
U	1.94	2.52	2.50	2.66	1.71	2.27	2.53	3.09		2.65		1.71
Y	10.20	9.39	13.80	7.63	6.49	7.00	12.40	4.25		13.50		11.50
La	37.1	29.1	22.9	13.6	17.3	21.4	22.8	19.3		19.2		16.8
Ce	56.9	45.9	44.4	31.3	33.0	36.1	46.3	36.9		38.6		32.7
Pr	5.67	4.71	5.23	3.12	3.49	3.98	5.57	2.71		4.76		4.06
Nd	17.4	14.3	16.8	10.1	11.7	12.5	18.5	8.3		16.1		13.7
Sm	2.75	2.29	3.05	1.81	1.74	2.07	3.10	1.27		3.09		2.50
Eu	0.56	0.53	0.45	0.26	0.44	0.54	0.63	0.47		0.55		0.40
Gd	2.38	1.89	2.38	1.51	1.61	1.67	2.42	1.16		2.43		1.93
Tb	0.33	0.28	0.39	0.23	0.22	0.23	0.36	0.15		0.41		0.31
Dy	1.68	1.42	2.15	1.34	1.18	1.16	1.93	0.73		2.39		1.75
Ho	0.31	0.27	0.41	0.26	0.22	0.21	0.36	0.14		0.43		0.34
Er	0.98	0.90	1.29	0.81	0.68	0.70	1.11	0.43		1.36		1.02
Tm	0.18	0.17	0.23	0.15	0.13	0.13	0.20	0.08		0.25		0.18
Yb	1.19	1.24	1.56	0.93	0.92	0.94	1.32	0.60		1.53		1.14
Lu	0.19	0.22	0.25	0.15	0.14	0.17	0.21	0.11		0.25		0.17
Zr/Hf	23.90	29.00	11.34	21.17	27.10	28.99	21.75	23.75		23.77		27.30
Nb/Ta	11.60	13.28	74.63	13.75	14.84	12.39	12.54	15.89		13.80		11.31
Rb/Sr	0.41	0.56	0.26	1.08	1.19	0.51	0.58	1.15		2.34		0.50
10000Ga/Al	2.49	2.47	2.52	2.11	2.08	2.30	2.42	2.45		2.35		2.21
(La/Yb)_N	21.07	15.89	9.91	9.82	12.75	15.31	11.68	21.79		8.48		9.96
δEu	0.66	0.78	0.51	0.48	0.80	0.89	0.70	1.18		0.62		0.55
Kfs	48	50	52	52	70	35	45	40		40		42
Pl	20	20	22	18	3	30	25	32		32		30
Q	27	26	22	28	27	30	28	25		23		25
Bt	5	4	2	2	<1	5	2	3		5		3

样品号	Hb170230	Hb170246	Hb170249	Hb170264	WJE078	Hb170234	Hb170263		Hb170229		Hb170248	Hb170265
岩性	中粗粒黑云母正长花岗岩	似斑状细中粒正长花岗岩	细中粒正长花岗岩	中细粒正长花岗岩	似斑状细粒碱长花岗岩	似斑状中细粒黑云母二长花岗岩	中粗粒花岗岩		似斑状细中粒二长花岗岩		细中粒黑云母二长花岗岩	细中粒二长花岗岩
SiO₂	76.22	73.63	75.60	77.81	74.58	74.41	74.11	74.09		75.45		76.70
Al₂O₃	12.66	14.03	13.25	12.26	13.54	13.64	13.80	13.90		13.29		12.71
TiO₂	0.21	0.21	0.13	0.10	0.19	0.22	0.22	0.23		0.13		0.12
Fe₂O₃	0.83	0.85	0.58	0.41	0.88	0.89	0.87	0.78		0.59		0.50
FeO	0.42	0.42	0.33	0.19	0.45	0.49	0.44	0.53		0.30		0.29
CaO	0.80	0.88	0.36	0.38	0.36	0.98	0.76	1.02		0.59		0.54
MgO	0.40	0.38	0.22	0.14	0.40	0.49	0.37	0.45		0.24		0.21
K₂O	3.58	4.31	4.45	4.22	4.36	3.55	4.25	3.92		4.41		4.15
Na₂O	4.20	4.55	4.53	4.12	4.11	4.61	4.38	4.39		4.44		4.30
MnO	0.053	0.064	0.071	0.051	0.060	0.060	0.046	0.034		0.067		0.056
P₂O₅	0.058	0.057	0.031	0.018	0.070	0.068	0.062	0.069		0.036		0.041
H₂O⁺	0.36	0.30	0.24	0.14	0.63	0.37	0.45	0.31		0.15		0.14
H₂O^-	0.22	0.16	0.17	0.17	0.41	0.18	0.24	0.30		0.16		0.16
烧失量	0.47	0.51	0.36	0.24	0.87	0.47	0.55	0.45		0.36		0.30
总量	99.91	99.89	99.92	99.94	99.87	99.89	99.88	99.87		99.91		99.92
Mg^#	37.97	36.62	32.16	31.36	36.51	40.48	35.28	39.60		33.91		34.29
DI	93.16	92.92	96.21	96.80	94.33	91.90	93.17	91.71		95.30		95.73
A/CNK	1.03	1.02	1.02	1.02	1.11	1.03	1.04	1.04		1.01		1.01
A/NK	1.17	1.15	1.08	1.08	1.18	1.19	1.17	1.21		1.10		1.10
σ	1.82	2.56	2.47	2.00	2.27	2.12	2.39	2.22		2.42		2.12
K₂O/Na₂O	0.85	0.95	0.98	1.02	1.06	0.77	0.97	0.89		0.99		0.97
FeO^T/MgO	2.94	3.12	3.80	3.94	3.13	2.65	3.30	2.75		3.51		3.45
K₂O+Na₂O	7.78	8.86	8.97	8.34	8.47	8.17	8.63	8.31		8.85		8.46
(K₂O+Na₂O) /CaO	9.70	10.03	24.64	22.08	23.69	8.35	11.33	8.11		15.12		15.80
Sc	1.51	2.25	2.03	1.01	1.57	2.04	1.23	1.18		1.14		1.13
V	11.90	12.60	5.78	2.37	12.40	15.10	12.30	15.30		5.27		4.02
Cr	2.80	2.41	1.52	1.69	4.29	4.20	1.65	4.63		1.86		2.25
Co	1.61	2.13	0.79	0.38	2.99	2.42	1.80	2.10		0.76		0.77
Ni	0.77	1.58	0.33	0.58	2.41	2.79	0.62	2.35		0.66		0.77
Ga	16.7	18.3	17.7	13.7	14.9	16.6	17.7	18.0		16.6		14.9
Rb	100	138	117	112	108	112	108	128		114		104
Sr	198.0	241.0	102.0	47.9	214.0	273.0	193.0	345.0		105.0		87.1
Zr	73.7	67.5	80.5	99.5	85.7	72.3	102.0	91.0		62.5		79.0
Nb	10.20	12.30	13.20	13.00	9.64	10.20	10.40	8.86		12.30		11.20
Cs	2.17	2.55	2.38	2.21	2.53	3.84	2.43	4.08		2.43		2.61
Ba	452	522	386	223	591	445	648	586		472		314
Hf	2.54	3.10	3.39	4.18	3.14	3.02	3.51	3.49		2.95		2.92
Ta	0.82	0.98	0.83	0.94	0.85	0.88	0.78	0.72		0.89		0.75
Pb	22.4	28.1	26.8	26.3	16.7	27.0	20.7	27.6		28.0		24.0
Th	15.70	15.90	11.80	8.60	10.20	15.10	10.30	15.50		8.91		7.60
U	1.94	2.52	2.50	2.66	1.71	2.27	2.53	3.09		2.65		1.71
Y	10.20	9.39	13.80	7.63	6.49	7.00	12.40	4.25		13.50		11.50
La	37.1	29.1	22.9	13.6	17.3	21.4	22.8	19.3		19.2		16.8
Ce	56.9	45.9	44.4	31.3	33.0	36.1	46.3	36.9		38.6		32.7
Pr	5.67	4.71	5.23	3.12	3.49	3.98	5.57	2.71		4.76		4.06
Nd	17.4	14.3	16.8	10.1	11.7	12.5	18.5	8.3		16.1		13.7
Sm	2.75	2.29	3.05	1.81	1.74	2.07	3.10	1.27		3.09		2.50
Eu	0.56	0.53	0.45	0.26	0.44	0.54	0.63	0.47		0.55		0.40
Gd	2.38	1.89	2.38	1.51	1.61	1.67	2.42	1.16		2.43		1.93
Tb	0.33	0.28	0.39	0.23	0.22	0.23	0.36	0.15		0.41		0.31
Dy	1.68	1.42	2.15	1.34	1.18	1.16	1.93	0.73		2.39		1.75
Ho	0.31	0.27	0.41	0.26	0.22	0.21	0.36	0.14		0.43		0.34
Er	0.98	0.90	1.29	0.81	0.68	0.70	1.11	0.43		1.36		1.02
Tm	0.18	0.17	0.23	0.15	0.13	0.13	0.20	0.08		0.25		0.18
Yb	1.19	1.24	1.56	0.93	0.92	0.94	1.32	0.60		1.53		1.14
Lu	0.19	0.22	0.25	0.15	0.14	0.17	0.21	0.11		0.25		0.17
Zr/Hf	23.90	29.00	11.34	21.17	27.10	28.99	21.75	23.75		23.77		27.30
Nb/Ta	11.60	13.28	74.63	13.75	14.84	12.39	12.54	15.89		13.80		11.31
Rb/Sr	0.41	0.56	0.26	1.08	1.19	0.51	0.58	1.15		2.34		0.50
10000Ga/Al	2.49	2.47	2.52	2.11	2.08	2.30	2.42	2.45		2.35		2.21
(La/Yb)_N	21.07	15.89	9.91	9.82	12.75	15.31	11.68	21.79		8.48		9.96
δEu	0.66	0.78	0.51	0.48	0.80	0.89	0.70	1.18		0.62		0.55
Kfs	48	50	52	52	70	35	45	40		40		42
Pl	20	20	22	18	3	30	25	32		32		30
Q	27	26	22	28	27	30	28	25		23		25
Bt	5	4	2	2	<1	5	2	3		5		3