西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学

张志; 陈毓川; 唐菊兴; 李壮; 宋俊龙; 杨毅; 胡正华; 杨欢欢; 杨超; 康浩然

doi:10.3799/dqkx.2015.006

西藏尕尔穷-嘎拉勒铜金矿集区火山岩年代学及地球化学

doi: 10.3799/dqkx.2015.006

1.
成都理工大学地球科学学院, 四川成都 610059
2.
中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037

基金项目:

国土资源部公益性行业科研专项项目 201011013-3

国家"973"项目 2011CB403103

国家自然科学基金项目 41172077

青藏专项优选项目 12120113037400

详细信息

作者简介:
张志(1985-), 男, 博士研究生, 主要从事青藏高原地质矿产研究.E-mail: tancer@qq.com

通讯作者:
唐菊兴, E-mail: tangjuxing@126.com

中图分类号: P581
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出版历程
- 收稿日期: 2014-04-10
- 刊出日期: 2015-01-15

Zircon U-Pb Age and Geochemical Characteristics of Volcanic Rocks in Gaerqiong-Galale Cu-Au Ore District, Tibet

1.
Faculty of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
2.
MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing 100037, China

摘要

摘要: 尕尔穷-嘎拉勒铜金矿集区是班-怒结合带南部的重要矿集区.矿集区内发育大面积火山岩, 利用锆石U-Pb年代学方法, 首次精确测定了研究区内不同地层中火山岩年龄, 并结合其岩石地球化学特征探讨了其形成构造背景.研究表明, 区内朗久组火山角砾岩成岩年龄为141.7.0±0.47 Ma(MSWD=0.43), 多爱组流纹岩年龄为136.80±0.48 Ma(MSWD=0.79), 形成时代为早白垩世初期, 属于班公湖-怒江洋南向俯冲的岩浆作用响应; 原定多爱组火山角砾岩(GE火山角砾岩)年龄为85.20±0.53 Ma(MSWD=3.40), 形成时代为晚白垩世, 不属于早白垩世多爱组产物, 属于洋盆消亡后羌塘陆块与冈底斯陆块汇聚阶段的火山作用产物, 晚于尕尔穷铜金矿的成矿年龄(86.87±0.50 Ma).岩石地球化学特征表明, 区内火山岩均具有相对富集Rb、Th、U等大离子亲石元素(LILE), 而亏损Ta、Nb、Yb、Ti等高场强元素(HFSE)的特征, 显示出弧火山岩特性.结合区域已有火山岩研究资料表明, 在班公湖-怒江洋南向俯冲过程中, 从早白垩世初至中晚期均有比较连续的火山作用, 持续时间约为30 Ma(140~110 Ma); 在班公湖-怒江洋盆消亡后的羌塘陆块与冈底斯陆块汇聚晚阶段, 又伴随有晚白垩世火山作用的发生, 该期火山作用与区内成矿岩体年龄相当, 可能为同一岩浆系统的产物. 关键字: 火山岩; 班公湖-怒江特提斯洋; 俯冲; 碰撞; 尕尔穷-嘎拉勒矿集区; 地球化学.
- 火山岩 /
- 班公湖-怒江特提斯洋 /
- 俯冲 /
- 碰撞 /
- 尕尔穷-嘎拉勒矿集区 /
- 地球化学
Abstract: Located in the southern Bangong Co-Nujiang River suture zone, the Gaerqiong-Galale ore district is an important Cu-Au ore dense district with a large area of volcanics. This study firstly accurately determinates the ages of volcanics in different strata using U-Pb zircon geochronology method, then discusses the structural setting during formation combining the geochemistry characteristics. The results show that volcanic breccia age of Langjiu Group is 141.70±0.47 Ma (MSWD=0.43), rhyolite age of Duoai Group is 136.80±0.48 Ma (MSWD=0.79), formation age is early Early Cretaceous, being attributed to volcanism of Bangong-Nujiang southward subduction; volcanic breccias age of Duoai Group (GE volcanic breccias) is 85.20±0.53 Ma (MSWD=3.40), formation age is Late Cretaceous and does not belong to the Early Cretaceous Duoai Group, which was the volcanism product of Qiangtang landmass and Gangdese landmass converging after ocean basin demise and was later than the mineralization age (86.87±0.50 Ma) of the Gaerqiong Cu-Au deposit. Geochemical characteristics indicate that volcanics are enriched in LILE, e.g. Rb, Th, U and others, but depleted in Ta, Nb, Yb, Ti and other HFSE, and it exhibits arc volcanic rock characteristics. It is found that there was continuous volcanism from early to middle Early Cretaceous during Bangong-Nujiang southward subduction about 30 Ma (140-110 Ma); it was also accompanied by volcanism of Late Cretaceous during Qiangtang landmass and Gangdese landmass converging after ocean basin demise; the age of this volcanism is similar to that of rock mineralization in district, and they may belong to the same magma system.
- volcanic rock /
- Bangong Co-Nujiang Tethys ocean /
- subduction /
- collision /
- Gaerqiong-Galale ore district /
- geochemisty

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图 1 尕尔穷-嘎拉勒矿集区地质简图

据唐菊兴等，2013修改

Fig. 1. Generalized geological map of the Gerqiong-Glale Cu-Au ore field

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图 2 尕尔穷-嘎拉勒矿集区火山岩照片

a.朗久组火山角砾岩；b.多爱组凝灰岩；c.GE火山角砾岩；d.多爱组流纹岩

Fig. 2. The Photos of volcanic rocks in Gaerqiong-Galale ore district

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图 3 尕尔穷-嘎拉勒矿集区火山岩锆石CL图像及锆石年龄谐和图

Fig. 3. CL image and concordia diagram of U-Pb data for zircons of volcanic rocks in Gaerqiong-Galale ore district

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图 4 尕尔穷-嘎拉勒矿集区火山岩TAS(a)、SiO₂-K₂O(b)、Yb+Ta-Rb(c)和La/Yb-Ba/La(d)图解

图d底图据朱弟成等(2006)

Fig. 4. TAS (a)、SiO₂ vs. K₂O (b)、Yb+Ta vs. Rb (c)、La/Yb vs. Ba/La (d) diagrams of volcanic rocks in Gaerqiong-Galale ore district

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图 5 尕尔穷-嘎拉勒矿集区火山岩HarKer图解

Fig. 5. Harker diagram of volcanic rocks in Gaerqiong-Galale ore district

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图 6 尕尔穷-嘎拉勒矿集区火山岩微量元素标准化蛛网图(a)及稀土元素球粒陨石标准化配分图(b)

Fig. 6. Primitive mantle normalized trace element spider diagram (a) and Chondrit-normalized REE-patterns (b) for volcanic rocks in Gaerqiong-Galale ore district

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表 1 尕尔穷-嘎拉勒矿集区朗久组火山角砾岩LA-ICP-MS锆石U-Pb同位素测年结果

Table 1. Zircons U-Pb data of the Langjiu group volcanic breccias in Gaerqiong-Galale ore district

测点号	元素含量(10^-6)			Th/U	同位素比值						表面年龄(Ma)
测点号	Pb	U	Tu	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	4.34	188.55	125.90	0.67	0.049 9	0.002 2	0.152 7	0.006 9	0.022 2	0.000 1	191.84	101.50	144.27	6.54	141.39	0.87
2	1.61	66.81	59.29	0.89	0.048 5	0.004 2	0.149 5	0.012 8	0.022 3	0.000 2	125.17	202.68	141.47	12.15	142.44	1.31
3	9.29	360.88	344.95	0.96	0.049 1	0.001 3	0.150 9	0.003 9	0.022 3	0.000 1	151.72	61.20	142.69	3.69	142.14	0.94
4	6.64	261.36	295.70	1.13	0.048 9	0.002 2	0.148 9	0.006 8	0.022 1	0.000 1	143.59	104.70	140.94	6.40	140.78	0.85
5	28.96	965.95	1 817.90	1.88	0.048 7	0.000 4	0.149 8	0.001 4	0.022 3	0.000 1	133.99	18.38	141.77	1.33	142.23	0.92
6	8.96	370.09	289.90	0.78	0.049 1	0.001 2	0.150 2	0.003 7	0.022 2	0.000 1	150.74	57.92	142.12	3.52	141.60	0.86
7	4.67	190.09	156.45	0.82	0.049 5	0.002 0	0.151 4	0.006 2	0.022 2	0.000 1	169.78	95.71	143.18	5.88	141.58	0.90
8	5.57	234.62	166.34	0.71	0.048 9	0.001 6	0.149 3	0.004 9	0.022 1	0.000 1	144.27	77.47	141.27	4.68	141.09	0.84
9	8.34	331.49	299.56	0.90	0.049 2	0.001 6	0.151 0	0.004 9	0.022 2	0.000 1	159.41	74.68	142.79	4.63	141.79	0.81
10	3.70	146.37	136.50	0.93	0.048 7	0.002 6	0.149 8	0.009 0	0.022 3	0.000 1	131.74	127.31	141.74	8.54	142.34	0.95
11	6.41	251.87	279.12	1.11	0.049 2	0.002 0	0.149 9	0.006 2	0.022 1	0.000 1	157.12	96.51	141.82	5.85	140.90	0.86
12	3.88	158.51	120.75	0.76	0.048 7	0.001 8	0.150 3	0.005 5	0.022 4	0.000 1	133.77	86.41	142.19	5.22	142.69	0.84
13	10.58	385.37	542.74	1.41	0.048 9	0.001 9	0.149 6	0.008 3	0.022 2	0.000 1	143.33	93.29	141.60	7.86	141.49	0.95
14	5.03	171.36	304.90	1.78	0.049 2	0.002 8	0.150 5	0.008 6	0.022 2	0.000 1	157.42	130.87	142.34	8.17	141.44	0.91

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表 2 尕尔穷-嘎拉勒矿集区GE火山角砾岩LA-ICP-MS锆石U-Pb测年结果

Table 2. Zircons U-Pb data of the Duoai group volcanic breccias in Gaerqiong-Galale ore district

测点号	元素含量(10^-6)			Th/U	同位素比值						表面年龄(Ma)
测点号	Pb	U	Tu	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	10.84	720.49	702.24	0.97	0.048 3	0.001 6	0.088 8	0.002 8	0.013 3	0.000 1	114.09	77.34	86.35	2.72	85.35	0.52
2	7.43	463.57	635.91	1.37	0.047 8	0.001 5	0.088 2	0.002 8	0.013 4	0.000 1	90.66	74.74	85.84	2.69	85.67	0.52
3	8.50	507.48	802.55	1.58	0.048 9	0.001 8	0.089 9	0.003 8	0.013 3	0.000 1	143.46	86.47	87.45	3.73	85.41	0.53
4	9.25	534.29	987.51	1.85	0.047 9	0.001 2	0.087 6	0.002 2	0.013 3	0.000 1	95.08	59.49	85.23	2.19	84.88	0.50
5	4.64	270.93	503.85	1.86	0.047 5	0.002 1	0.086 2	0.003 9	0.013 1	0.000 1	76.70	105.38	83.92	3.79	84.18	0.54
6	6.79	383.34	769.37	2.01	0.047 7	0.001 8	0.086 9	0.003 3	0.013 2	0.000 1	82.33	88.27	84.63	3.19	84.71	0.53
7	8.49	496.48	822.28	1.66	0.048 1	0.001 3	0.088 6	0.002 4	0.013 4	0.000 1	102.66	63.81	86.20	2.37	85.61	0.50
8	12.78	788.11	1 125.61	1.43	0.048 5	0.001 0	0.088 1	0.001 8	0.013 2	0.000 1	122.66	46.28	85.71	1.71	84.39	0.49
9	6.18	399.04	440.00	1.10	0.048 8	0.001 5	0.089 7	0.002 8	0.013 3	0.000 1	138.38	70.48	87.19	2.70	85.34	0.53
10	7.42	452.13	672.36	1.49	0.048 6	0.001 3	0.088 0	0.002 4	0.013 1	0.000 1	129.40	62.49	85.64	2.32	84.08	0.50
11	6.08	368.33	487.05	1.32	0.046 8	0.001 8	0.086 8	0.003 3	0.013 5	0.000 1	37.04	91.90	84.49	3.26	86.18	0.58
12	12.33	739.63	1 120.10	1.51	0.049 5	0.001 0	0.090 8	0.001 9	0.013 3	0.000 1	170.17	44.92	88.21	1.82	85.21	0.52
13	7.39	462.43	639.68	1.38	0.049 0	0.001 7	0.088 7	0.003 1	0.013 1	0.000 1	149.29	80.73	86.28	2.97	84.02	0.52
14	7.27	430.22	618.90	1.44	0.048 5	0.001 5	0.091 6	0.002 8	0.013 7	0.000 1	122.51	71.75	88.98	2.76	87.74	0.53
15	13.64	857.56	1 059.60	1.24	0.048 1	0.000 7	0.089 0	0.001 4	0.013 4	0.000 1	103.57	35.90	86.57	1.36	85.96	0.51

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表 3 尕尔穷-嘎拉勒矿集区多爱组流纹岩LA-ICP-MS锆石U-Pb同位素测年

Table 3. Zircons U-Pb data of the Duoai group rhyolite in Gaerqiong-Galale ore district

测点号	元素含量(10^-6)			Th/U	同位素比值						表面年龄(Ma)
测点号	Pb	U	Tu	Th/U	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²⁰⁶Pb	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
1	2.00	82.99	60.18	0.73	0.048 9	0.003 6	0.146 0	0.010 7	0.021 7	0.000 2	140.98	171.14	138.39	10.15	138.24	1.11
2	2.64	112.21	70.50	0.63	0.048 5	0.003 9	0.144 2	0.011 7	0.021 6	0.000 2	121.32	188.99	136.76	11.06	137.65	1.06
3	10.51	461.55	293.82	0.64	0.049 0	0.002 1	0.143 7	0.006 2	0.021 3	0.000 1	146.80	102.77	136.36	5.90	135.76	0.81
4	2.80	110.62	114.95	1.04	0.049 2	0.004 1	0.144 7	0.012 0	0.021 3	0.000 2	156.91	194.36	137.21	11.40	136.07	1.07
5	8.10	354.85	190.97	0.54	0.048 6	0.001 0	0.143 8	0.003 1	0.021 5	0.000 1	128.02	49.54	136.42	2.90	136.90	0.89
6	2.36	103.22	55.87	0.54	0.049 3	0.003 6	0.145 7	0.010 9	0.021 5	0.000 1	159.99	173.02	138.09	10.29	136.82	0.94
7	9.18	400.03	212.78	0.53	0.048 9	0.000 9	0.145 0	0.002 7	0.021 5	0.000 1	141.79	41.58	137.48	2.54	137.24	0.79
8	6.39	260.55	221.41	0.85	0.048 6	0.001 9	0.143 7	0.005 6	0.021 4	0.000 1	129.61	90.72	136.36	5.31	136.8	0.85
9	2.53	95.59	99.99	1.05	0.049 1	0.003 8	0.144 0	0.011 4	0.021 3	0.000 2	152.05	182.86	136.62	10.81	135.73	1.14
10	3.50	151.53	79.57	0.53	0.049 1	0.003 6	0.143 8	0.010 6	0.021 2	0.000 2	151.86	171.09	136.42	10.05	135.53	0.97
11	8.90	378.02	227.20	0.60	0.048 3	0.001 4	0.142 9	0.004 0	0.021 4	0.000 1	115.20	66.43	135.63	3.76	136.80	0.83
12	6.83	300.99	131.64	0.44	0.048 8	0.001 9	0.145 5	0.005 7	0.021 6	0.000 1	137.55	89.50	137.94	5.38	137.96	0.85
13	5.97	248.47	204.18	0.82	0.049 1	0.002 1	0.145 1	0.006 2	0.021 4	0.000 1	153.05	101.56	137.57	5.92	136.67	0.91
14	3.59	148.34	126.59	0.85	0.048 7	0.004 8	0.142 5	0.013 8	0.021 2	0.000 2	134.69	229.12	135.28	13.09	135.31	1.17
15	3.43	144.59	125.98	0.87	0.049 4	0.004 4	0.146 7	0.013 2	0.021 5	0.000 2	168.72	210.07	139.03	12.50	137.30	1.04

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表 4 尕尔穷-嘎拉勒矿集区火山岩主量元素(10^-2)分析结果

Table 4. Major element (10^-2) composition of volcanic rocks in Gaerqiong-Galale ore district

原样编号	多爱组凝灰岩		朗久组凝灰岩		多爱组流纹岩			朗久组火山角砾岩		GE火山角砾岩
原样编号	NGB01	NGB02	XGB01	XGB02	HGB01	HGB02	HGB03	EGB01	EGB02	JGB01	JGB02	JGB03
SiO₂	58.71	58.71	54.03	57.64	81.78	81.61	78.98	66.21	66.15	68.48	71.58	70.36
Al₂O₃	19.24	19.09	17.83	16.08	6.39	6.78	6.28	15.23	14.74	12.92	10.78	11.47
Fe₂O₃	0.092	0.049	2.00	3.25	0.26	0.052	0.16	0.73	0.84	2.24	1.65	1.85
FeO	3.76	3.71	4.60	3.68	0.61	0.51	0.61	2.30	1.89	1.94	2.66	2.07
MgO	2.24	2.24	4.18	3.39	0.32	0.50	0.44	1.74	1.38	0.91	0.52	0.49
CaO	5.85	5.82	5.89	5.73	3.74	4.04	5.75	3.06	3.89	3.35	4.63	4.69
Na₂O	1.08	1.09	4.61	3.31	1.09	1.12	0.97	3.41	3.45	2.34	2.31	1.99
K₂O	6.07	5.97	3.36	2.95	3.29	3.01	2.98	1.81	1.72	4.77	3.73	4.79
TiO₂	0.62	0.61	0.87	0.76	0.10	0.11	0.10	0.49	0.40	0.41	0.22	0.25
MnO	0.027	0.022	0.14	0.092	0.033	0.029	0.045	0.057	0.066	0.073	0.15	0.12
P₂O₅	0.045	0.045	0.34	0.28	0.018	0.020	0.017	0.17	0.14	0.091	0.066	0.069
LOSS	1.72	1.97	1.49	2.21	2.24	2.03	3.03	4.63	5.21	2.06	1.31	1.25
Mg^#	51.70	52.10	62.00	62.40	48.40	63.80	56.30	57.60	56.80	45.70	26.00	29.90
总计	99.50	99.30	99.30	99.40	99.90	99.80	99.40	99.80	99.90	99.60	99.60	99.40
石英(Q)	10.90	11.50	0.00	10.60	58.80	58.50	55.90	30.90	30.00	29.50	35.50	32.60
钙长石(An)	29.50	29.50	18.40	20.90	2.88	4.71	4.14	14.90	19.60	10.90	8.18	8.39
钠长石(Ab)	9.37	9.43	37.90	28.80	9.48	9.66	8.48	30.30	30.90	20.30	19.90	17.10
正长石(Or)	36.70	36.20	20.30	17.90	19.90	18.20	18.30	11.20	10.80	28.90	22.40	28.80
霞石(Ne)	0.00	0.00	1.08	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
刚玉(C)	0.32	0.34	0.00	0.00	0.00	0.00	0.00	2.58	0.43	0.00	0.00	0.00
透辉石(Di)	0.00	0.00	7.72	5.45	3.32	4.23	4.24	0.00	0.00	4.69	9.41	6.68
紫苏辉石(Hy)	11.70	11.70	0.00	9.50	0.00	0.00	0.00	7.61	6.00	1.49	0.00	0.00
硅灰石(Wo)	0.00	0.00	0.00	0.00	5.05	4.41	8.48	0.00	0.00	0.00	1.63	2.99
橄榄石(Ol)	0.00	0.00	9.16	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
钛铁矿(Il)	1.21	1.19	1.68	1.48	0.19	0.21	0.20	0.99	0.81	0.79	0.42	0.48
磁铁矿(Mt)	0.14	0.07	2.97	4.64	0.38	0.08	0.24	1.11	1.28	3.19	2.44	2.73
磷灰石(Ap)	0.11	0.11	0.80	0.68	0.04	0.05	0.04	0.41	0.35	0.22	0.15	0.16
锆石(Zr)	0.05	0.05	0.04	0.03	0.01	0.01	0.01	0.03	0.02	0.03	0.02	0.02
铬铁矿(Cm)	0.01	0.01	0.00	0.01	0.00	0.00	0.00	0.01	0.01	0.00	0.00	0.00
合计	100.04	100.03	99.99	100.02	100.00	100.01	100.02	100.03	100.02	100.03	100.02	100.03
分异指数(DI)	57.00	57.10	59.20	57.40	88.10	86.30	82.70	72.40	71.60	78.70	77.80	78.60
A/CNK	1.01	1.01	0.81	0.84	0.53	0.55	0.41	1.16	1.01	0.86	0.66	0.68
固结指数(SI)	16.90	17.20	22.30	20.50	5.74	9.64	8.52	17.40	14.90	7.47	4.78	4.38
注：Mg^#=100×Mg(Mg+Fe²⁺).

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表 5 尕尔穷-嘎拉勒矿集区火山岩微量元素(10^-6)分析结果

Table 5. Trace element (10^-6) composition of volcanic rocks in Gaerqiong-Galale ore district

编号	多爱组凝灰岩		朗久组凝灰岩		多爱组流纹岩			朗久组火山角砾岩		GE火山角砾岩
编号	NGB01	NGB02	XGB01	XGB02	HGB01	HGB02	HGB03	EGB01	EGB02	JGB01	JGB02	JGB03
As	2.44	2.10	4.24	13.90	67.60	34.90	69.50	5.11	8.18	7.02	9.90	5.53
Ba	357.00	329.00	471.00	578.00	267.00	227.00	258.00	337.00	245.00	774.00	475.00	653.00
Co	9.34	8.86	22.40	13.30	1.37	1.87	1.69	8.89	7.94	6.01	3.06	4.02
Cr	33.50	34.40	15.80	26.70	6.18	5.94	5.97	34.60	31.50	6.57	9.41	6.65
Cs	34.00	36.40	6.52	5.26	3.34	4.76	4.02	5.33	15.10	18.60	19.3	6.26
Cu	26.20	14.50	25.80	9.26	12.60	4.78	4.36	5.06	21.80	51.20	23.10	34.50
Ga	22.50	25.60	19.10	20.00	5.40	5.61	5.47	16.50	17.00	13.60	11.40	11.10
Hf	8.22	8.21	4.95	4.13	1.46	1.81	1.56	3.90	3.23	4.60	3.53	3.44
Nb	15.20	16.90	15.20	12.60	3.81	3.12	3.58	14.30	6.49	10.30	10.40	10.10
Ni	18.70	17.40	13.90	9.03	4.26	5.11	3.97	24.70	22.10	3.32	3.71	2.15
Pb	78.30	94.40	7.23	11.10	19.30	29.30	28.90	14.30	6.58	24.30	17.80	18.50
Rb	382.00	369.00	175.00	134.00	182.00	171.00	158.00	95.00	101.00	189.00	168.00	201.00
Sb	1.06	1.04	0.80	0.66	0.88	1.58	1.47	0.66	0.50	1.39	0.91	0.70
Sc	16.50	15.60	13.70	16.60	1.91	1.99	1.89	6.22	5.67	7.32	5.78	5.58
Sr	174.00	172.00	727.00	561.00	158.00	162.00	131.00	275.00	333.00	327.00	229.00	283.00
Ta	1.40	1.48	0.96	0.86	0.39	0.17	0.27	1.09	0.62	0.86	0.99	0.95
Th	21.50	24.10	7.87	9.21	5.36	5.93	5.10	8.32	6.54	14.40	17.70	17.60
U	2.06	2.32	1.70	1.80	1.19	1.14	1.16	2.05	1.48	2.55	2.31	2.35
V	61.40	58.80	145.00	133.00	10.10	9.29	9.80	55.20	47.00	44.30	21.40	25.30
Zn	51.80	44.10	115.00	65.60	19.60	20.30	23.00	45.00	70.20	47.60	34.60	55.90
Zr	272.00	271.00	185.00	153.00	47.60	59.20	49.50	139.00	117.00	156.00	113.00	109.00
Ce	115.00	111.00	58.70	68.60	25.00	21.80	35.70	48.50	47.60	85.60	67.30	81.10
Dy	7.70	7.21	4.20	4.81	1.44	1.36	2.23	1.83	1.70	3.78	4.00	3.62
Er	4.72	4.37	2.43	2.74	0.95	0.92	1.35	1.05	0.96	2.29	2.47	2.23
Eu	1.91	1.71	1.68	1.89	0.40	0.37	0.58	0.90	0.86	1.23	0.93	0.95
Gd	8.79	7.99	5.25	6.00	1.61	1.44	2.32	2.70	2.70	5.43	4.83	4.85
Ho	1.59	1.48	0.85	0.98	0.31	0.30	0.48	0.36	0.35	0.77	0.83	0.76
La	52.60	50.00	30.50	33.00	12.30	10.60	13.30	28.50	24.30	50.90	39.70	45.00
Lu	0.70	0.68	0.34	0.36	0.16	0.17	0.19	0.15	0.13	0.35	0.37	0.33
Nd	48.80	44.50	28.00	33.00	8.95	7.71	12.10	18.00	18.30	37.00	30.60	32.10
Pr	11.90	10.90	6.69	7.71	2.34	1.93	3.00	4.76	4.68	9.69	7.92	8.57
Sm	9.53	8.52	5.35	6.54	1.66	1.38	2.48	2.82	3.04	6.05	5.26	5.21
Tb	1.33	1.23	0.76	0.88	0.25	0.23	0.38	0.35	0.35	0.72	0.72	0.65
Tm	0.68	0.65	0.34	0.37	0.15	0.15	0.19	0.15	0.13	0.33	0.37	0.32
Y	36.20	35.50	23.90	22.90	9.73	9.30	11.20	10.90	9.58	19.40	21.60	18.70
Yb	4.65	4.42	2.20	2.43	1.04	1.04	1.25	0.98	0.85	2.20	2.51	2.13
ΣREE	270.00	254.00	147.00	169.00	56.60	49.30	75.50	111.00	106.00	206.00	168.00	188.00
LREE	240.00	226.00	131.00	151.00	50.70	43.70	67.10	104.00	98.70	190.00	152.00	173.00
HREE	30.20	28.00	16.30	18.60	5.92	5.59	8.39	7.58	7.15	15.90	16.10	14.90
LREE/HREE	7.94	8.08	8.01	8.11	8.56	7.82	8.00	13.70	13.80	12.00	9.41	11.60
La_N/Yb_N	8.12	8.11	9.95	9.72	8.51	7.29	7.59	20.90	20.60	16.60	11.40	15.20
δEu	0.64	0.63	0.97	0.92	0.75	0.81	0.73	1.00	0.92	0.66	0.56	0.58
δCe	1.12	1.17	1.01	1.06	1.14	1.18	1.39	1.02	1.09	0.95	0.93	1.01

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