大兴安岭北段塔河南部早白垩世侵入岩年代学和地球化学

doi:10.19657/j.geoscience.1000-8527.2018.06.10

摘要/Abstract

摘要：

以大兴安岭北段塔河南部基性、中性和酸性侵入岩(SiO₂=51.27%~74.90%)为研究对象,通过锆石U-Pb年代学、Hf同位素和岩石地球化学分析,探讨了其岩石成因和构造环境。测定的2件样品锆石U-Pb定年结果分别是(126.9±0.8) Ma和(123.4±0.9) Ma,侵位于早白垩世。在哈克(Harker)图解中,多数样品主量元素和微量元素随SiO₂含量增加具有很好的线性演化趋势(除K₂O和Rb外)。微量元素总体显示富集Pb和大离子亲石元素K、Rb、Ba等,亏损高场强元素Nb、Ta、Ti、P等,并具有相似的Sr、Nd同位素特征((⁸⁷Sr/⁸⁶Sr)_i=0.705 517~0.706 827,ε_Nd(t)=-6.82~0.79)。综合研究认为,塔河南部早白垩世侵入岩的岩浆源区是与俯冲有关的熔流体交代的石榴子石二辉橄榄岩相和尖晶石二辉橄榄岩相的混合源区,且以石榴子石二辉橄榄岩相为主,在岩浆快速上升的过程中主要经历了分离结晶作用,最后形成一套宽谱系的岩浆演化序列。结合中国东北地区火山岩展布方向、古地磁资料、蒙古—鄂霍茨克洋闭合时间以及古太平洋板块俯冲方向等已有成果,认为大兴安岭北段塔河南部的侵入岩产出在与蒙古—鄂霍茨克洋闭合有关的后碰撞环境。

关键词: 大兴安岭, 锆石U-Pb定年, 分离结晶, 早白垩世, 蒙古—鄂霍茨克洋

Abstract:

This paper presents zircon U-Pb dating, in-situ zircon Hf isotopic and geochemical data for the intrusive rocks from southern Tahe, northern Great Xing’an Range, to constrain their petrogenesis and tectonic settings. The rocks consist of a continuous mafic to felsic magmatic suite (SiO₂=51.27%-74.90%). Zircon U-Pb dating indicates that the two intrusive rock samples analyzed were emplaced in the Early Cretaceous (126.9±0.8) Ma and (123.4±0.9) Ma). In the Harker diagrams, most of the major elements and trace elements have a good linear evolutionary trend with increasing SiO₂ content (except K₂O and Rb). The rocks are generally enriched in Pb and LILEs (K, Rb, Ba), depleted in HFSEs (Nb, Ta, Ti, P), and have similar Sr and Nb isotope characteristics (⁸⁷Sr/⁸⁶Sr_i=0.705,517-0.706,827, ε_Nd(t)=-6.82-0.79). This indicates that the Early Cretaceous intrusive rocks in southern Tahe derived from a mixed source of garnet lherzolite (predominant) and spinel lherzolite, which were metasomatized by subduction-related fluids or melts. During the rapid magma ascent, the magma has experienced fractionation, eventually forming a broad compositional spectrum of rocks. The paper reviews the distribution of volcanic rocks in northeast China, paleomagnetic data, the timing of the Mongolia-Okhotsk ocean closure and the subduction direction of the Paleo-Pacific Plate. These data imply that the Early Cretaceous intrusive rocks in southern Tahe were likely formed in a post-collisional setting after the closure of the Mongolia-Okhotsk ocean.

Key words: Great Xing’an Range, zircon U-Pb dating, fractional crystallization, Early Cretaceous, Mongolia-Okhotsk ocean

中图分类号:

P588.12

徐立明, 王大可, 刘玉, 郑吉林, 张文强, 梁中恺. 大兴安岭北段塔河南部早白垩世侵入岩年代学和地球化学[J]. 现代地质, 2018, 32(06): 1212-1226.

XU Liming, WANG Dake, LIU Yu, ZHENG Jilin, ZHANG Wenqiang, LIANG Zhongkai. Age and Geochemistry of the Early Cretaceous Intrusive Rocks in Southern Tahe, Northern Great Xing’an Range[J]. Geoscience, 2018, 32(06): 1212-1226.

图/表 13

图1 东北地区构造分区((a)据文献[14])主要地理单元((b)据文献[15])和研究区地质简图(c) F1.牡丹江断裂;F2.敦化—密山断裂;F3.伊通—依兰断裂;F4.西拉木伦—长春断裂;F5.贺根山—黑河断裂;F6.塔源—喜桂图断裂;F7.蒙古—鄂霍茨克断裂

Fig.1 Maps showing the tectonic subdivision(a), major geographical units(b) of NE China and geology(c) of the study area

图2 研究区侵入岩野外采样和显微镜下照片 (a)SPM9-5-1石英二长岩侵入中生代安山岩中;(b)样品SPM13TC19取样探槽;(c)细粒辉长岩镜下照片;(d)闪长岩镜下照片;(e)似斑状石英二长岩镜下照片;(f)二长花岗岩镜下照片。Pl.斜长石;Kfs.钾长石;Hbi.角闪石;Bt.黑云母;Px.普通辉石;Q.石英

Fig.2 Field photos and thin section photomicrographs of the intrusive rocks from the study area

表1 研究区侵入岩锆石LA-ICP-MS U-Pb分析结果

Table 1 LA-ICP-MS U-Pb zircon analytical data of the intrusive rocks from the study area

测点	w_B/10^-6		Th/U	同位素比值							年龄/Ma
测点	Pb	U	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ		²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
SPM3TC27-1	3	121	1.57	0.020 2	0.000 4	0.135 5	0.033 8	0.048 8	0.012 4	128.6		2.8	129.1	32.2	137.3	595.5
SPM3TC27-2	3	100	1.48	0.020 1	0.000 3	0.134 7	0.015 4	0.048 5	0.021 8	128.5		1.9	128.3	14.7	124.6	105 6.8
SPM3TC27-3	1	47	1.10	0.020 0	0.000 4	0.134 3	0.023 8	0.048 8	0.013 9	127.3		2.8	128.0	22.7	139.7	669.5
SPM3TC27-4	1	42	1.11	0.019 6	0.000 4	0.133 6	0.017 8	0.049 6	0.007 3	124.8		2.3	127.4	16.9	174.7	341.4
SPM3TC27-5	1	41	1.12	0.020 2	0.000 5	0.135 4	0.026 0	0.048 5	0.011 1	129.2		3.2	128.9	24.7	123.9	539.4
SPM3TC27-6	1	49	1.19	0.020 0	0.000 3	0.133 8	0.017 0	0.048 4	0.006 5	128.0		2.2	127.5	16.2	119.6	315.6
SPM3TC27-7	1	37	1.15	0.019 6	0.000 4	0.131 6	0.014 1	0.048 8	0.005 5	124.9		2.6	125.6	13.4	137.7	263.2
SPM3TC27-8	1	43	1.44	0.019 9	0.000 8	0.133 3	0.028 6	0.048 6	0.011 8	126.9		5.0	127.1	27.3	129.9	572.8
SPM3TC27-9	1	40	1.11	0.020 1	0.000 4	0.132 0	0.026 2	0.047 6	0.010 4	128.5		2.7	125.9	25.0	77.5	520.2
SPM3TC27-10	1	53	1.44	0.020 2	0.000 5	0.135 3	0.028 9	0.048 5	0.012 4	129.1		2.9	128.8	27.5	122.7	601.6
SPM3TC27-11	2	56	1.60	0.020 7	0.000 4	0.138 0	0.028 9	0.048 3	0.011 7	132.1		2.4	131.2	27.5	115.3	570.2
SPM3TC27-12	1	42	1.21	0.019 7	0.000 3	0.131 9	0.013 7	0.048 5	0.005 6	125.9		2.1	125.8	13.1	124.3	270.2
SPM3TC27-13	3	113	1.24	0.020 4	0.000 3	0.136 3	0.012 8	0.048 5	0.004 6	130.2		1.8	129.8	12.2	122.2	222.6
SPM3TC27-14	1	52	1.17	0.019 4	0.000 3	0.134 0	0.011 1	0.050 2	0.004 3	123.6		1.9	127.7	10.6	204.1	199.7
SPM3TC27-15	2	89	1.33	0.020 3	0.000 3	0.135 8	0.017 5	0.048 6	0.006 6	129.3		1.7	129.3	16.7	128.3	318.1
SPM3TC27-16	2	62	1.28	0.019 9	0.000 3	0.134 7	0.010 2	0.049 2	0.003 8	126.9		1.9	128.3	9.7	155.9	179.8
SPM3TC27-17	11	333	2.98	0.020 2	0.000 2	0.134 1	0.004 6	0.048 1	0.001 7	129.0		1.4	127.7	4.3	104.9	82.9
SPM3TC27-18	2	59	1.66	0.019 8	0.000 3	0.133 3	0.015 0	0.048 9	0.006 0	126.3		2.1	127.1	14.3	142.1	285.9
SPM3TC27-19	1	47	1.18	0.020 1	0.000 4	0.133 4	0.025 4	0.048 1	0.011 8	128.5		2.4	127.2	24.2	103.4	580.5
SPM3TC27-20	1	52	1.59	0.019 7	0.000 8	0.133 6	0.064 5	0.049 1	0.026 4	126.1		4.9	127.3	61.4	150.5	125 9.4
SPM3TC27-21	1	48	1.22	0.020 1	0.000 3	0.134 6	0.029 1	0.048 6	0.010 3	128.2		2.2	128.2	27.7	129.1	498.6
SPM3TC27-22	2	61	2.89	0.020 1	0.000 3	0.132 8	0.021 3	0.048 0	0.008 2	128.2		1.8	126.6	20.3	97.4	407.0
SPM3TC27-23	1	53	1.23	0.019 5	0.000 4	0.132 4	0.015 0	0.049 3	0.006 4	124.5		2.3	126.3	14.3	160.0	303.5
SPM3TC27-24	2	56	1.34	0.019 4	0.000 3	0.134 0	0.013 6	0.050 2	0.008 3	123.7		2.0	127.7	13.0	203.5	383.4
SPM3TC27-25	1	50	1.33	0.019 4	0.000 5	0.131 4	0.026 1	0.049 1	0.009 9	123.9		3.0	125.4	24.9	153.8	470.8
SPM3TC27-26	2	76	1.19	0.020 2	0.000 5	0.134 4	0.031 9	0.048 2	0.013 3	129.0		3.2	128.1	30.4	110.7	653.3
SPM3TC27-27	2	79	1.65	0.019 6	0.000 3	0.132 3	0.008 9	0.049 1	0.003 2	124.9		1.7	126.2	8.5	150.6	152.1
SPM3TC27-28	21	272	12.24	0.018 7	0.000 4	0.136 5	0.007 6	0.052 8	0.003 0	119.7		2.4	130.0	7.3	322.2	128.0
SPM3TC27-29	8	268	2.99	0.020 0	0.000 3	0.134 8	0.014 8	0.048 8	0.005 2	127.8		1.6	128.4	14.1	138.9	250.5
SPM3TC27-30	1	61	1.38	0.019 8	0.000 3	0.133 9	0.029 6	0.049 0	0.011 6	126.5		2.0	127.6	28.2	146.9	555.0
SPM3TC27-31	1	40	1.13	0.019 2	0.000 4	0.129 4	0.015 4	0.048 8	0.006 0	122.8		2.6	123.6	14.7	139.5	289.0
SPM3TC27-32	1	55	1.16	0.019 6	0.000 4	0.130 9	0.013 7	0.048 4	0.005 3	125.2		2.3	124.9	13.1	120.8	257.8
SPM13TC19-1	4	164	1.05	0.019 4	0.000 2	0.197 6	0.010 8	0.073 8	0.004 0	123.9		1.3	183.1	10.0	1 037.0	108.7
SPM13TC19-2	4	145	0.87	0.019 5	0.000 2	0.168 9	0.011 5	0.062 9	0.004 3	124.4		1.3	158.5	10.8	704.4	146.2
SPM13TC19-3	2	84	0.74	0.019 7	0.000 3	0.210 0	0.020 6	0.077 2	0.007 9	125.9		1.6	193.6	19.0	1 127.2	204.3
SPM13TC19-4	2	85	0.65	0.019 3	0.000 3	0.159 1	0.019 1	0.059 7	0.007 8	123.3		1.6	149.9	18.0	593.7	282.9
SPM13TC19-5	4	175	1.10	0.019 7	0.000 2	0.145 7	0.009 7	0.053 8	0.003 6	125.5		1.3	138.1	9.2	360.6	151.5
SPM13TC19-6	16	605	1.49	0.019 7	0.000 2	0.168 0	0.004 1	0.061 9	0.001 5	125.6		1.2	157.7	3.9	670.7	51.4
SPM13TC19-7	11	393	1.40	0.020 3	0.000 2	0.314 6	0.007 1	0.112 6	0.002 5	129.3		1.3	277.8	6.3	1 842.1	39.4
SPM13TC19-8	3	134	1.13	0.019 5	0.000 2	0.212 5	0.015 9	0.078 9	0.005 9	124.7		1.4	195.7	14.7	1 170.5	148.5
SPM13TC19-9	4	183	0.89	0.019 6	0.000 2	0.218 7	0.009 8	0.080 8	0.003 5	125.4		1.3	200.8	9.0	1 215.7	86.1
SPM13TC19-10	9	334	1.36	0.020 0	0.000 2	0.227 2	0.006 2	0.082 5	0.002 2	127.5		1.2	207.9	5.7	1 257.3	51.8
SPM13TC19-11	5	205	0.79	0.020 6	0.000 2	0.307 5	0.012 2	0.108 5	0.004 1	131.2		1.4	272.2	10.8	1 774.4	68.9
SPM13TC19-12	6	201	1.27	0.020 7	0.000 2	0.317 1	0.010 5	0.111 0	0.003 6	132.2		1.4	279.6	9.3	1 816.3	59.0
SPM13TC19-13	3	105	1.01	0.019 5	0.000 2	0.152 0	0.016 6	0.056 4	0.006 6	124.7		1.5	143.6	15.7	468.4	260.1
SPM13TC19-14	13	478	2.06	0.019 5	0.000 2	0.139 4	0.004 6	0.051 9	0.001 6	124.3		1.2	132.5	4.3	283.1	72.4
SPM13TC19-15	3	129	1.12	0.019 7	0.000 2	0.173 4	0.015 1	0.064 0	0.005 7	125.4		1.4	162.4	14.1	741.7	188.7
SPM13TC19-16	4	161	1.21	0.020 5	0.000 2	0.319 0	0.014 5	0.113 0	0.005 0	130.7		1.4	281.1	12.8	1 848.0	79.6
SPM13TC19-17	4	167	0.87	0.019 6	0.000 2	0.182 2	0.012 2	0.067 4	0.004 5	125.2		1.3	170.0	11.4	849.2	138.3
SPM13TC19-18	9	362	1.39	0.019 4	0.000 2	0.142 0	0.006 1	0.053 0	0.002 3	124.1		1.2	134.8	5.8	327.5	97.0
SPM13TC19-19	3	135	0.95	0.019 7	0.000 2	0.227 5	0.018 0	0.083 7	0.006 5	125.8		1.5	208.2	16.5	1 286.0	151.6
SPM13TC19-20	6	229	1.12	0.019 5	0.000 2	0.146 1	0.008 2	0.054 3	0.003 0	124.6		1.3	138.5	7.8	382.4	125.5
SPM13TC19-21	2	98	0.62	0.020 0	0.000 3	0.233 5	0.024 2	0.084 5	0.008 9	127.9		1.7	213.1	22.1	1 303.8	204.4

表1 研究区侵入岩锆石LA-ICP-MS U-Pb分析结果

Table 1 LA-ICP-MS U-Pb zircon analytical data of the intrusive rocks from the study area

测点	w_B/10^-6		Th/U	同位素比值							年龄/Ma
测点	Pb	U	Th/U	²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ		²⁰⁶Pb/ ²³⁸U	±1σ	²⁰⁷Pb/ ²³⁵U	±1σ	²⁰⁷Pb/ ²⁰⁶Pb	±1σ
SPM3TC27-1	3	121	1.57	0.020 2	0.000 4	0.135 5	0.033 8	0.048 8	0.012 4	128.6		2.8	129.1	32.2	137.3	595.5
SPM3TC27-2	3	100	1.48	0.020 1	0.000 3	0.134 7	0.015 4	0.048 5	0.021 8	128.5		1.9	128.3	14.7	124.6	105 6.8
SPM3TC27-3	1	47	1.10	0.020 0	0.000 4	0.134 3	0.023 8	0.048 8	0.013 9	127.3		2.8	128.0	22.7	139.7	669.5
SPM3TC27-4	1	42	1.11	0.019 6	0.000 4	0.133 6	0.017 8	0.049 6	0.007 3	124.8		2.3	127.4	16.9	174.7	341.4
SPM3TC27-5	1	41	1.12	0.020 2	0.000 5	0.135 4	0.026 0	0.048 5	0.011 1	129.2		3.2	128.9	24.7	123.9	539.4
SPM3TC27-6	1	49	1.19	0.020 0	0.000 3	0.133 8	0.017 0	0.048 4	0.006 5	128.0		2.2	127.5	16.2	119.6	315.6
SPM3TC27-7	1	37	1.15	0.019 6	0.000 4	0.131 6	0.014 1	0.048 8	0.005 5	124.9		2.6	125.6	13.4	137.7	263.2
SPM3TC27-8	1	43	1.44	0.019 9	0.000 8	0.133 3	0.028 6	0.048 6	0.011 8	126.9		5.0	127.1	27.3	129.9	572.8
SPM3TC27-9	1	40	1.11	0.020 1	0.000 4	0.132 0	0.026 2	0.047 6	0.010 4	128.5		2.7	125.9	25.0	77.5	520.2
SPM3TC27-10	1	53	1.44	0.020 2	0.000 5	0.135 3	0.028 9	0.048 5	0.012 4	129.1		2.9	128.8	27.5	122.7	601.6
SPM3TC27-11	2	56	1.60	0.020 7	0.000 4	0.138 0	0.028 9	0.048 3	0.011 7	132.1		2.4	131.2	27.5	115.3	570.2
SPM3TC27-12	1	42	1.21	0.019 7	0.000 3	0.131 9	0.013 7	0.048 5	0.005 6	125.9		2.1	125.8	13.1	124.3	270.2
SPM3TC27-13	3	113	1.24	0.020 4	0.000 3	0.136 3	0.012 8	0.048 5	0.004 6	130.2		1.8	129.8	12.2	122.2	222.6
SPM3TC27-14	1	52	1.17	0.019 4	0.000 3	0.134 0	0.011 1	0.050 2	0.004 3	123.6		1.9	127.7	10.6	204.1	199.7
SPM3TC27-15	2	89	1.33	0.020 3	0.000 3	0.135 8	0.017 5	0.048 6	0.006 6	129.3		1.7	129.3	16.7	128.3	318.1
SPM3TC27-16	2	62	1.28	0.019 9	0.000 3	0.134 7	0.010 2	0.049 2	0.003 8	126.9		1.9	128.3	9.7	155.9	179.8
SPM3TC27-17	11	333	2.98	0.020 2	0.000 2	0.134 1	0.004 6	0.048 1	0.001 7	129.0		1.4	127.7	4.3	104.9	82.9
SPM3TC27-18	2	59	1.66	0.019 8	0.000 3	0.133 3	0.015 0	0.048 9	0.006 0	126.3		2.1	127.1	14.3	142.1	285.9
SPM3TC27-19	1	47	1.18	0.020 1	0.000 4	0.133 4	0.025 4	0.048 1	0.011 8	128.5		2.4	127.2	24.2	103.4	580.5
SPM3TC27-20	1	52	1.59	0.019 7	0.000 8	0.133 6	0.064 5	0.049 1	0.026 4	126.1		4.9	127.3	61.4	150.5	125 9.4
SPM3TC27-21	1	48	1.22	0.020 1	0.000 3	0.134 6	0.029 1	0.048 6	0.010 3	128.2		2.2	128.2	27.7	129.1	498.6
SPM3TC27-22	2	61	2.89	0.020 1	0.000 3	0.132 8	0.021 3	0.048 0	0.008 2	128.2		1.8	126.6	20.3	97.4	407.0
SPM3TC27-23	1	53	1.23	0.019 5	0.000 4	0.132 4	0.015 0	0.049 3	0.006 4	124.5		2.3	126.3	14.3	160.0	303.5
SPM3TC27-24	2	56	1.34	0.019 4	0.000 3	0.134 0	0.013 6	0.050 2	0.008 3	123.7		2.0	127.7	13.0	203.5	383.4
SPM3TC27-25	1	50	1.33	0.019 4	0.000 5	0.131 4	0.026 1	0.049 1	0.009 9	123.9		3.0	125.4	24.9	153.8	470.8
SPM3TC27-26	2	76	1.19	0.020 2	0.000 5	0.134 4	0.031 9	0.048 2	0.013 3	129.0		3.2	128.1	30.4	110.7	653.3
SPM3TC27-27	2	79	1.65	0.019 6	0.000 3	0.132 3	0.008 9	0.049 1	0.003 2	124.9		1.7	126.2	8.5	150.6	152.1
SPM3TC27-28	21	272	12.24	0.018 7	0.000 4	0.136 5	0.007 6	0.052 8	0.003 0	119.7		2.4	130.0	7.3	322.2	128.0
SPM3TC27-29	8	268	2.99	0.020 0	0.000 3	0.134 8	0.014 8	0.048 8	0.005 2	127.8		1.6	128.4	14.1	138.9	250.5
SPM3TC27-30	1	61	1.38	0.019 8	0.000 3	0.133 9	0.029 6	0.049 0	0.011 6	126.5		2.0	127.6	28.2	146.9	555.0
SPM3TC27-31	1	40	1.13	0.019 2	0.000 4	0.129 4	0.015 4	0.048 8	0.006 0	122.8		2.6	123.6	14.7	139.5	289.0
SPM3TC27-32	1	55	1.16	0.019 6	0.000 4	0.130 9	0.013 7	0.048 4	0.005 3	125.2		2.3	124.9	13.1	120.8	257.8
SPM13TC19-1	4	164	1.05	0.019 4	0.000 2	0.197 6	0.010 8	0.073 8	0.004 0	123.9		1.3	183.1	10.0	1 037.0	108.7
SPM13TC19-2	4	145	0.87	0.019 5	0.000 2	0.168 9	0.011 5	0.062 9	0.004 3	124.4		1.3	158.5	10.8	704.4	146.2
SPM13TC19-3	2	84	0.74	0.019 7	0.000 3	0.210 0	0.020 6	0.077 2	0.007 9	125.9		1.6	193.6	19.0	1 127.2	204.3
SPM13TC19-4	2	85	0.65	0.019 3	0.000 3	0.159 1	0.019 1	0.059 7	0.007 8	123.3		1.6	149.9	18.0	593.7	282.9
SPM13TC19-5	4	175	1.10	0.019 7	0.000 2	0.145 7	0.009 7	0.053 8	0.003 6	125.5		1.3	138.1	9.2	360.6	151.5
SPM13TC19-6	16	605	1.49	0.019 7	0.000 2	0.168 0	0.004 1	0.061 9	0.001 5	125.6		1.2	157.7	3.9	670.7	51.4
SPM13TC19-7	11	393	1.40	0.020 3	0.000 2	0.314 6	0.007 1	0.112 6	0.002 5	129.3		1.3	277.8	6.3	1 842.1	39.4
SPM13TC19-8	3	134	1.13	0.019 5	0.000 2	0.212 5	0.015 9	0.078 9	0.005 9	124.7		1.4	195.7	14.7	1 170.5	148.5
SPM13TC19-9	4	183	0.89	0.019 6	0.000 2	0.218 7	0.009 8	0.080 8	0.003 5	125.4		1.3	200.8	9.0	1 215.7	86.1
SPM13TC19-10	9	334	1.36	0.020 0	0.000 2	0.227 2	0.006 2	0.082 5	0.002 2	127.5		1.2	207.9	5.7	1 257.3	51.8
SPM13TC19-11	5	205	0.79	0.020 6	0.000 2	0.307 5	0.012 2	0.108 5	0.004 1	131.2		1.4	272.2	10.8	1 774.4	68.9
SPM13TC19-12	6	201	1.27	0.020 7	0.000 2	0.317 1	0.010 5	0.111 0	0.003 6	132.2		1.4	279.6	9.3	1 816.3	59.0
SPM13TC19-13	3	105	1.01	0.019 5	0.000 2	0.152 0	0.016 6	0.056 4	0.006 6	124.7		1.5	143.6	15.7	468.4	260.1
SPM13TC19-14	13	478	2.06	0.019 5	0.000 2	0.139 4	0.004 6	0.051 9	0.001 6	124.3		1.2	132.5	4.3	283.1	72.4
SPM13TC19-15	3	129	1.12	0.019 7	0.000 2	0.173 4	0.015 1	0.064 0	0.005 7	125.4		1.4	162.4	14.1	741.7	188.7
SPM13TC19-16	4	161	1.21	0.020 5	0.000 2	0.319 0	0.014 5	0.113 0	0.005 0	130.7		1.4	281.1	12.8	1 848.0	79.6
SPM13TC19-17	4	167	0.87	0.019 6	0.000 2	0.182 2	0.012 2	0.067 4	0.004 5	125.2		1.3	170.0	11.4	849.2	138.3
SPM13TC19-18	9	362	1.39	0.019 4	0.000 2	0.142 0	0.006 1	0.053 0	0.002 3	124.1		1.2	134.8	5.8	327.5	97.0
SPM13TC19-19	3	135	0.95	0.019 7	0.000 2	0.227 5	0.018 0	0.083 7	0.006 5	125.8		1.5	208.2	16.5	1 286.0	151.6
SPM13TC19-20	6	229	1.12	0.019 5	0.000 2	0.146 1	0.008 2	0.054 3	0.003 0	124.6		1.3	138.5	7.8	382.4	125.5
SPM13TC19-21	2	98	0.62	0.020 0	0.000 3	0.233 5	0.024 2	0.084 5	0.008 9	127.9		1.7	213.1	22.1	1 303.8	204.4

表2 研究区侵入岩锆石Hf同位素分析结果

Table 2 Zircon Hf isotopic data of the intrusive rocks from the study area

测点	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(0)	ε_Hf(t)	T_DM/Ma	$T D M C$ /Ma	f_Lu/Hf
SPM13TC19-1	124.4	0.034 486	0.001 143	0.282 788	0.000 023	0.282 785	0.6	3.2	660	978	-0.97
SPM13TC19-2	125.9	0.031 751	0.001 047	0.282 736	0.000 019	0.282 733	-1.3	1.4	732	1 094	-0.97
SPM13TC19-3	123.3	0.048 326	0.001 598	0.282 741	0.000 022	0.282 738	-1.1	1.5	735	1 086	-0.95
SPM13TC19-4	125.4	0.051 590	0.001 555	0.282 774	0.000 018	0.282 770	0.1	2.7	687	1 010	-0.95
SPM13TC19-5	124.7	0.048 914	0.001 511	0.282 765	0.000 022	0.282 761	-0.3	2.4	700	1 031	-0.95
SPM13TC19-6	124.3	0.054 456	0.001 697	0.282 753	0.000 018	0.282 749	-0.7	1.9	721	1 060	-0.95
SPM13TC19-7	125.4	0.084 832	0.002 566	0.282 724	0.000 018	0.282 718	-1.7	0.8	781	1 129	-0.92
SPM13TC19-8	124.1	0.102 235	0.003 124	0.282 767	0.000 019	0.282 760	-0.2	2.3	729	1 035	-0.91
SPM13TC19-9	125.8	0.049 982	0.001 541	0.282 772	0.000 018	0.282 769	0.0	2.6	690	1 014	-0.95
SPM13TC19-10	124.6	0.085 726	0.002 616	0.282 822	0.000 018	0.282 816	1.8	4.3	636	907	-0.92
SPM13TC19-11	127.9	0.030 372	0.000 971	0.282 741	0.000 017	0.282 739	-1.1	1.6	723	1 080	-0.97

表2 研究区侵入岩锆石Hf同位素分析结果

Table 2 Zircon Hf isotopic data of the intrusive rocks from the study area

测点	年龄/Ma	¹⁷⁶Yb/¹⁷⁷Hf	¹⁷⁶Lu/¹⁷⁷Hf	¹⁷⁶Hf/¹⁷⁷Hf	2σ	(¹⁷⁶Hf/¹⁷⁷Hf)_i	ε_Hf(0)	ε_Hf(t)	T_DM/Ma	$T D M C$ /Ma	f_Lu/Hf
SPM13TC19-1	124.4	0.034 486	0.001 143	0.282 788	0.000 023	0.282 785	0.6	3.2	660	978	-0.97
SPM13TC19-2	125.9	0.031 751	0.001 047	0.282 736	0.000 019	0.282 733	-1.3	1.4	732	1 094	-0.97
SPM13TC19-3	123.3	0.048 326	0.001 598	0.282 741	0.000 022	0.282 738	-1.1	1.5	735	1 086	-0.95
SPM13TC19-4	125.4	0.051 590	0.001 555	0.282 774	0.000 018	0.282 770	0.1	2.7	687	1 010	-0.95
SPM13TC19-5	124.7	0.048 914	0.001 511	0.282 765	0.000 022	0.282 761	-0.3	2.4	700	1 031	-0.95
SPM13TC19-6	124.3	0.054 456	0.001 697	0.282 753	0.000 018	0.282 749	-0.7	1.9	721	1 060	-0.95
SPM13TC19-7	125.4	0.084 832	0.002 566	0.282 724	0.000 018	0.282 718	-1.7	0.8	781	1 129	-0.92
SPM13TC19-8	124.1	0.102 235	0.003 124	0.282 767	0.000 019	0.282 760	-0.2	2.3	729	1 035	-0.91
SPM13TC19-9	125.8	0.049 982	0.001 541	0.282 772	0.000 018	0.282 769	0.0	2.6	690	1 014	-0.95
SPM13TC19-10	124.6	0.085 726	0.002 616	0.282 822	0.000 018	0.282 816	1.8	4.3	636	907	-0.92
SPM13TC19-11	127.9	0.030 372	0.000 971	0.282 741	0.000 017	0.282 739	-1.1	1.6	723	1 080	-0.97

表3 研究区侵入岩主量元素、稀土元素和微量元素分析结果

Table 3 Major, rare earth and trace element compositions of the intrusive rocks from the study area

样品号	w_B/%																										Mg^#			A/CNK		w_B/10^-6
样品号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量		Mg^#			A/CNK		Li		Be
SPM2TC28	52.07		1.21		18.51		3.79		4.86		0.12		4.42		8.16		3.72		1.38		0.33		1.11		99.69		49.03			0.83		7.81		1.39
SPM2TC54	51.27		1.10		17.84		4.64		3.50		0.11		3.71		8.06		2.78		2.15		0.36		4.16		99.68		46.53			0.83		15.9		1.29
SPM13TC8	59.72		0.73		16.93		2.99		2.69		0.13		2.00		4.48		4.31		3.32		0.38		2.06		99.73		40.10			0.90		22.2		2.78
SPM13TC19	57.40		0.92		18.83		2.87		2.69		0.10		2.06		4.68		4.81		3.26		0.45		1.53		99.61		41.32			0.94		17.9		2.07
SPM14TC92	58.89		0.80		17.13		3.78		3.05		0.11		2.14		5.21		4.55		2.34		0.38		1.30		99.70		37.33			0.88		10.6		1.66
SPM14TC66	58.38		0.94		17.01		4.32		2.42		0.12		2.58		4.53		4.17		2.93		0.30		1.99		99.69		42.41			0.93		14.0		2.45
SPM14TC86	59.28		0.80		16.97		4.84		1.68		0.14		2.30		4.41		4.13		2.82		0.32		2.02		99.71		40.69			0.95		10.5		1.95
SPM9-5-1	68.18		0.44		15.60		1.73		1.21		0.06		0.90		2.24		4.44		3.89		0.14		0.91		99.74		36.91			1.00		12.6		2.42
D2012	65.43		0.67		15.30		2.39		1.46		0.06		1.56		1.82		4.33		4.43		0.17		2.16		99.78		43.82			1.01		25.8		3.18
SPM7-2-2	62.82		0.94		16.74		1.95		2.95		0.11		1.15		2.23		4.48		5.10		0.35		0.91		99.73		30.56			0.99		13.2		3.96
SPM13TC84	66.61		0.54		16.50		2.34		0.69		0.08		0.67		0.87		4.77		5.57		0.15		0.95		99.75		30.14			1.07		10.0		3.41
SPM3TC27	68.92		0.53		15.32		1.73		1.03		0.08		0.81		1.33		4.94		4.17		0.14		0.78		99.80		36.07			1.02		19.2		2.32
样品号	w_B/10^-6
样品号	Sc	V		Cr		Co		Ni		Cu		Ga		Rb		Sr		Y		Zr		Nb		Ba		La		Ce	Pr		Nd		Sm
SPM2TC28	25.3	232		51.7		33.7		25.6		64.4		24.6		28.7		1351		17.8		128		6.56		694		19.4		41.7	5.81		25.7		5.47
SPM2TC54	19.8	219		42.0		25.9		13.0		57.4		21.5		54.6		1330		16.1		118		6.78		702		22.1		45.4	6.15		25.2		5.25
SPM13TC8	10.1	117		14.6		11.2		1.23		20.7		21.8		103		899		18.5		170		11.5		728		28.2		61.8	8.05		31.4		5.82
SPM13TC19	8.62	91.7		17.0		9.99		2.72		16.6		22.3		81.1		1245		17.0		183		11.2		1141		32.0		71.0	9.19		36.3		6.10
SPM14TC92	12.0	125		16.0		13.0		1.97		17.8		23.2		66.8		1172		19.6		134		6.91		826.		28.0		57.3	7.20		29.3		5.76
SPM14TC66	15.4	167		19.4		14.9		11.8		21.7		25.5		99.6		1075		19.7		250		12.1		1005		28.5		63.9	8.99		36.3		6.87
SPM14TC86	11.7	133		5.03		11.4		2.12		24.1		22.4		80.3		933		21.1		164		7.95		970		32.7		58.4	7.83		30.9		5.93
SPM9-5-1	5.57	52.4		17.1		5.16		1.98		11.6		18.6		116		548		13.9		222		10.9		905		33.1		67.0	7.45		25.7		4.08
D2012	7.22	81.3		43.3		11.0		18.6		27.1		22.7		187		389		13.4		308		11.1		725		38.9		82.7	9.78		34.0		5.37
SPM7-2-2	10.1	48.3		5.47		7.09		1.82		5.80		21.5		92.8		505		30.7		436		53.0		1006		57.5		123	12.3		44.5		8.19
SPM13TC84	6.60	35.0		4.92		2.81		1.35		3.23		22.4		197		307		18.8		391		19.7		1126		36.7		78.5	8.86		33.1		5.61
SPM3TC27	5.04	40.6		3.02		3.49		1.41		4.12		21.6		88.2		460		19.0		247		12.6		907		40.5		74.1	10.0		36.5		6.11
样品号	w_B/10^-6
样品号	Eu	Gd		Tb		Dy		Ho		Er		Tm		Yb		Lu		Hf		Ta		Pb		Th		U		Mo	δEu		(La/Yb)_N
SPM2TC28	1.58	4.37		0.67		3.57		0.7		1.94		0.31		1.78		0.36		3.4		0.44		12.1		2.09		0.57		0.54	0.96		7.82
SPM2TC54	1.54	4.1		0.62		3.45		0.64		1.79		0.28		1.52		0.34		3.19		0.5		10.2		2.96		0.8		0.66	0.98		10.43
SPM13TC8	1.49	4.64		0.73		3.89		0.71		2.10		0.34		2.25		0.40		5.24		0.79		12.5		8.43		1.08		0.4	0.85		8.98
SPM13TC19	1.73	4.98		0.72		3.80		0.65		1.95		0.30		1.89		0.32		4.94		0.69		12.9		5.24		1.04		0.29	0.93		12.09
SPM14TC92	1.74	4.95		0.77		4.08		0.77		2.30		0.35		2.45		0.34		4.42		0.51		12.2		3.89		1.21		0.63	0.97		8.21
SPM14TC66	1.56	5.23		0.74		4.11		0.74		2.14		0.34		1.84		0.46		6.08		0.77		14.1		10.9		2.2		0.89	0.76		11.11
SPM14TC86	1.6	4.78		0.74		4.07		0.78		2.22		0.36		2.1		0.38		5.13		0.65		10.8		8		1.01		0.47	0.89		11.17
SPM9-5-1	0.96	3.37		0.48		2.58		0.49		1.52		0.25		1.83		0.33		7.21		0.82		18.1		12.7		1.68		1.06	0.77		12.98
D2012	1.00	4.24		0.58		2.73		0.46		1.47		0.22		1.46		0.41		8.39		0.90		25.3		27.2		3.45		1.26	0.62		19.09
SPM7-2-2	2.25	7.26		1.11		6.39		1.16		3.29		0.53		3		0.41		18.5		2.98		19.5		11.1		1.35		0.45	0.87		13.75
SPM13TC84	1.04	4.49		0.66		3.58		0.68		2.05		0.35		2.08		0.62		8.71		1.15		16.8		11.7		2.42		1.83	0.61		12.66
SPM3TC27	1.26	4.63		0.69		3.64		0.67		2.03		0.31		1.89		0.30		11.6		0.98		24.6		11.6		1.23		0.76	0.70		15.34

表3 研究区侵入岩主量元素、稀土元素和微量元素分析结果

Table 3 Major, rare earth and trace element compositions of the intrusive rocks from the study area

样品号	w_B/%																										Mg^#			A/CNK		w_B/10^-6
样品号	SiO₂		TiO₂		Al₂O₃		Fe₂O₃		FeO		MnO		MgO		CaO		Na₂O		K₂O		P₂O₅		烧失量		总量		Mg^#			A/CNK		Li		Be
SPM2TC28	52.07		1.21		18.51		3.79		4.86		0.12		4.42		8.16		3.72		1.38		0.33		1.11		99.69		49.03			0.83		7.81		1.39
SPM2TC54	51.27		1.10		17.84		4.64		3.50		0.11		3.71		8.06		2.78		2.15		0.36		4.16		99.68		46.53			0.83		15.9		1.29
SPM13TC8	59.72		0.73		16.93		2.99		2.69		0.13		2.00		4.48		4.31		3.32		0.38		2.06		99.73		40.10			0.90		22.2		2.78
SPM13TC19	57.40		0.92		18.83		2.87		2.69		0.10		2.06		4.68		4.81		3.26		0.45		1.53		99.61		41.32			0.94		17.9		2.07
SPM14TC92	58.89		0.80		17.13		3.78		3.05		0.11		2.14		5.21		4.55		2.34		0.38		1.30		99.70		37.33			0.88		10.6		1.66
SPM14TC66	58.38		0.94		17.01		4.32		2.42		0.12		2.58		4.53		4.17		2.93		0.30		1.99		99.69		42.41			0.93		14.0		2.45
SPM14TC86	59.28		0.80		16.97		4.84		1.68		0.14		2.30		4.41		4.13		2.82		0.32		2.02		99.71		40.69			0.95		10.5		1.95
SPM9-5-1	68.18		0.44		15.60		1.73		1.21		0.06		0.90		2.24		4.44		3.89		0.14		0.91		99.74		36.91			1.00		12.6		2.42
D2012	65.43		0.67		15.30		2.39		1.46		0.06		1.56		1.82		4.33		4.43		0.17		2.16		99.78		43.82			1.01		25.8		3.18
SPM7-2-2	62.82		0.94		16.74		1.95		2.95		0.11		1.15		2.23		4.48		5.10		0.35		0.91		99.73		30.56			0.99		13.2		3.96
SPM13TC84	66.61		0.54		16.50		2.34		0.69		0.08		0.67		0.87		4.77		5.57		0.15		0.95		99.75		30.14			1.07		10.0		3.41
SPM3TC27	68.92		0.53		15.32		1.73		1.03		0.08		0.81		1.33		4.94		4.17		0.14		0.78		99.80		36.07			1.02		19.2		2.32
样品号	w_B/10^-6
样品号	Sc	V		Cr		Co		Ni		Cu		Ga		Rb		Sr		Y		Zr		Nb		Ba		La		Ce	Pr		Nd		Sm
SPM2TC28	25.3	232		51.7		33.7		25.6		64.4		24.6		28.7		1351		17.8		128		6.56		694		19.4		41.7	5.81		25.7		5.47
SPM2TC54	19.8	219		42.0		25.9		13.0		57.4		21.5		54.6		1330		16.1		118		6.78		702		22.1		45.4	6.15		25.2		5.25
SPM13TC8	10.1	117		14.6		11.2		1.23		20.7		21.8		103		899		18.5		170		11.5		728		28.2		61.8	8.05		31.4		5.82
SPM13TC19	8.62	91.7		17.0		9.99		2.72		16.6		22.3		81.1		1245		17.0		183		11.2		1141		32.0		71.0	9.19		36.3		6.10
SPM14TC92	12.0	125		16.0		13.0		1.97		17.8		23.2		66.8		1172		19.6		134		6.91		826.		28.0		57.3	7.20		29.3		5.76
SPM14TC66	15.4	167		19.4		14.9		11.8		21.7		25.5		99.6		1075		19.7		250		12.1		1005		28.5		63.9	8.99		36.3		6.87
SPM14TC86	11.7	133		5.03		11.4		2.12		24.1		22.4		80.3		933		21.1		164		7.95		970		32.7		58.4	7.83		30.9		5.93
SPM9-5-1	5.57	52.4		17.1		5.16		1.98		11.6		18.6		116		548		13.9		222		10.9		905		33.1		67.0	7.45		25.7		4.08
D2012	7.22	81.3		43.3		11.0		18.6		27.1		22.7		187		389		13.4		308		11.1		725		38.9		82.7	9.78		34.0		5.37
SPM7-2-2	10.1	48.3		5.47		7.09		1.82		5.80		21.5		92.8		505		30.7		436		53.0		1006		57.5		123	12.3		44.5		8.19
SPM13TC84	6.60	35.0		4.92		2.81		1.35		3.23		22.4		197		307		18.8		391		19.7		1126		36.7		78.5	8.86		33.1		5.61
SPM3TC27	5.04	40.6		3.02		3.49		1.41		4.12		21.6		88.2		460		19.0		247		12.6		907		40.5		74.1	10.0		36.5		6.11
样品号	w_B/10^-6
样品号	Eu	Gd		Tb		Dy		Ho		Er		Tm		Yb		Lu		Hf		Ta		Pb		Th		U		Mo	δEu		(La/Yb)_N
SPM2TC28	1.58	4.37		0.67		3.57		0.7		1.94		0.31		1.78		0.36		3.4		0.44		12.1		2.09		0.57		0.54	0.96		7.82
SPM2TC54	1.54	4.1		0.62		3.45		0.64		1.79		0.28		1.52		0.34		3.19		0.5		10.2		2.96		0.8		0.66	0.98		10.43
SPM13TC8	1.49	4.64		0.73		3.89		0.71		2.10		0.34		2.25		0.40		5.24		0.79		12.5		8.43		1.08		0.4	0.85		8.98
SPM13TC19	1.73	4.98		0.72		3.80		0.65		1.95		0.30		1.89		0.32		4.94		0.69		12.9		5.24		1.04		0.29	0.93		12.09
SPM14TC92	1.74	4.95		0.77		4.08		0.77		2.30		0.35		2.45		0.34		4.42		0.51		12.2		3.89		1.21		0.63	0.97		8.21
SPM14TC66	1.56	5.23		0.74		4.11		0.74		2.14		0.34		1.84		0.46		6.08		0.77		14.1		10.9		2.2		0.89	0.76		11.11
SPM14TC86	1.6	4.78		0.74		4.07		0.78		2.22		0.36		2.1		0.38		5.13		0.65		10.8		8		1.01		0.47	0.89		11.17
SPM9-5-1	0.96	3.37		0.48		2.58		0.49		1.52		0.25		1.83		0.33		7.21		0.82		18.1		12.7		1.68		1.06	0.77		12.98
D2012	1.00	4.24		0.58		2.73		0.46		1.47		0.22		1.46		0.41		8.39		0.90		25.3		27.2		3.45		1.26	0.62		19.09
SPM7-2-2	2.25	7.26		1.11		6.39		1.16		3.29		0.53		3		0.41		18.5		2.98		19.5		11.1		1.35		0.45	0.87		13.75
SPM13TC84	1.04	4.49		0.66		3.58		0.68		2.05		0.35		2.08		0.62		8.71		1.15		16.8		11.7		2.42		1.83	0.61		12.66
SPM3TC27	1.26	4.63		0.69		3.64		0.67		2.03		0.31		1.89		0.30		11.6		0.98		24.6		11.6		1.23		0.76	0.70		15.34

表4 研究区侵入岩及收集样品全岩Sr-Nd同位素分析结果

Table 4 Sr-Nd isotopic compositions of the intrusive rocks from the study area

样品号	岩性	⁸⁷Rb/⁸⁶Sr	⁸⁷Sr/⁸⁶Sr	2σ	(⁸⁷Sr/⁸⁶Sr)_i	¹⁴⁷Sm/¹⁴⁴Nd	¹⁴³Nd/¹⁴⁴Nd	2σ	(¹⁴³Nd/¹⁴⁴Nd)_i	ε_Nd(t)
SPM3TC27	酸性岩样品	0.557 0	0.706 512	6	0.705 507	0.103 3	0.512 472	3	0.512 386	-1.72
PM17TC34^*		0.766 6	0.707 697	6	0.706 313	0.095 2	0.512 438	9	0.512 359	-2.26
0075-3^*		0.568 2	0.706 208	14	0.705 182	0.1	0.512 598	12	0.512 515	0.79
0075-4^*		3.703 2	0.709 796	13	0.703 112	0.09	0.512 549	13	0.512 474	-0.01
0076-2^*		0.814 0	0.706 878	14	0.705 409	0.09	0.512 541	10	0.512 466	-0.16
0076-9^*		1.209 3	0.707 674	11	0.705 491	0.11	0.512 553	14	0.512 462	-0.25
05TH05^*	基性岩样品	0.238 4	0.705 947	14	0.705 517	0.118 4	0.512 503	12	0.512 405	-1.36
05TH10^*		0.088 8	0.707 665	13	0.707 505	0.115	0.512 285	15	0.512 189	-5.56
05TH11^*		0.122 2	0.707 794	10	0.707 573	0.067 8	0.512 527	13	0.512 471	-0.08
05TH12^*		0.345 8	0.706 747	12	0.706 123	0.107 4	0.512 567	18	0.512 478	0.06
05TH14^*		0.262 9	0.706 191	10	0.705 716	0.108 1	0.512 494	15	0.512 404	-1.37
05TH16^*		0.217 5	0.706 368	10	0.705 975	0.109 9	0.512 52	12	0.512 429	-0.90
05TH17^*		0.166 0	0.706 297	14	0.705 997	0.110 7	0.5124 93	12	0.512 401	-1.44
05TH19^*		0.100 1	0.706 934	12	0.706 753	0.109 1	0.5123 82	13	0.512 291	-3.58
05TH21^*		0.096 9	0.707 002	12	0.706 827	0.067 3	0.5125 49	13	0.512 493	0.36
05TH23^*		0.112 3	0.705 952	14	0.705 749	0.124 1	0.5125 26	14	0.512 423	-1.01
05TH25^*		0.066 2	0.705 836	10	0.705 717	0.110 2	0.5125 37	11	0.512 445	-0.57
05TH26^*		0.070 9	0.705 816	14	0.705 688	0.178 8	0.5124 08	13	0.512 259	-4.20
05TH27^*		0.160 1	0.708 140	12	0.707 851	0.190 2	0.5122 83	11	0.512 125	-6.82

图3 研究区侵入岩锆石阴极发光(CL)图像及锆石U-Pb年龄谐和图

Fig.3 Zircon CL images and concordia diagrams for the intrusive rocks from the study area

图4 研究区侵入岩SiO2-K2O图解((a)底图据[23])、A/CNK-A/NK图解((b)底图据[24])

Fig.4 SiO2 vs.K2O diagram (a) and A/CNK vs. A/NK diagram (b) of the intrusive rocks from the study area

图5 研究区侵入岩稀土元素配分曲线(a)和微量元素原始地幔标准化蛛网图(b)(标准化数值据文献[25])

Fig.5 Chondrite-normalized REE patterns (a) and primitive mantle-normalized trace elements spidergram (b) of intrusive rocks from the study area

图6 87Sr/86Sr初始值柱状图(a)和εNd(t)值柱状图(b)(数据引自文献[29?-31])

Fig.6 Histograms of initial 87Sr/86Sr value (a) and εNd(t) (b)

图7 研究区侵入岩Harker图解[27]

Fig.7 Harker variation diagrams of intrusive rocks from the study area[27]

图8 Ta/Yb-Th/Yb图解((a)底图据文献[43])、Th/Sm-Th/Yb图解(b)和Nb/Y-Ba/Th图解(c)

Fig.8 Diagrams of Ta/Yb vs.Th/Yb(a), Th/Sm vs. Th/Yb (b) and Nb/Y vs. Ba/Th (c)

图9 Sm-Sm/Yb图解(a)和La/Sm-Sm/Yb图解(b) DMM.亏损地幔[46];PM.原始地幔[25];尖晶石二辉橄榄岩(Ol53+Opx27+Cpx17+Sp11)熔融曲线和石榴子石二辉橄榄岩相(Ol60+Opx20+Cpx10+Gt10)熔融曲线引自文献[43]

Fig.9 Diagrams of Sm vs.Sm/Yb (a) and La/Sm vs. Sm/Yb (b)

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