黑龙江省嫩江—黑河构造混杂岩带科洛金矿床成因:来自黄铁矿化学成分及He-Ar、S、Pb同位素证据

doi:10.13745/j.esf.sf.2020.5.37

摘要/Abstract

摘要：

科洛金矿床位于黑龙江省嫩江—黑河构造混杂岩带中,为一正在勘查的中型金矿床。前人研究认为该矿床为一中温、富水、低盐度的韧性剪切带型金矿床。但随着勘查工作的持续开展,新发现了大量含多金属硫化物的石英脉型矿石。为进一步明确该矿床成因,对科洛金矿床内韧性变形和浸染状-团块状两种不同产状黄铁矿进行了系统的成分标型及稳定同位素特征研究。结果表明:韧性变形黄铁矿较浸染-团块状黄铁矿的S/Fe值低,Au、Ag、Co含量高,As含量低,总体显示韧性变形黄铁矿相对贫硫;黄铁矿微量元素显示两类黄铁矿REE具有相似的地球化学特征,整体呈轻稀土富集、重稀土亏损的“右倾”式稀土配分模式。稀土元素总量为17.00×10^-6~66.95×10^-6,韧性变形黄铁矿含量明显偏低,LREE/HREE值为5.25~12.50,相对较稳定。Y/Ho值与地幔和地壳重合范围较多,Zr/Hf值、Nb/Ta值变化范围较大,显示成矿环境不稳定;黄铁矿³He含量为2.405×10^-13~10.811×10^-13,⁴He含量为3.35×10^-7~4.99×10^-7,³He-⁴He图和R/R_a-⁴⁰Ar/³⁶Ar图显示成矿流体有以地幔为主的壳幔混源特征,成矿过程应有大气降水的参与;黄铁矿δ³⁴S变化范围小,集中在+2.3‰~+7.6‰(韧性变形黄铁矿δ³⁴S平均值偏低),稍正向偏离陨石硫特征;黄铁矿的²⁰⁶Pb/²⁰⁴Pb=18.157~18.211;²⁰⁷Pb/²⁰⁴Pb=15.542~15.594;²⁰⁸Pb/²⁰⁴Pb=38.032~38.218(韧性变形黄铁矿的²⁰⁶Pb/²⁰⁴Pb、²⁰⁷Pb/²⁰⁴Pb、²⁰⁸Pb/²⁰⁴Pb平均值偏低),均显示与造山作用关系密切。利用黄铁矿化学成分特征元素Co/Ni值及Co-Ni成因判别图解认为科洛金矿有热液成因矿床特征;利用w(Fe+S)-w(As)图解和Co-Ni-As含量图解显示石英脉型矿石反映浅成低温热液型金矿特征。综合区域变质变形事件、典型矿床特征及矿区内已取得的年龄、流体包裹体等相关数据认为,科洛金矿床应存在两期矿化:三叠纪形成的韧性剪切带型金矿床和白垩纪形成的浅成低温热液型金矿床。建议在今后的矿产勘查中注意寻找真正的韧性剪切带型金矿。

关键词: 成分标型, He-Ar,S,Pb同位素, 黄铁矿, 科洛金矿床, 嫩江—黑河, 黑龙江省

Abstract:

The mid-sized Keluo gold deposit is located in the Heihe-Nenjiang tectonic melange belt, Heilongjiang Province, China. The ore bodies in the deposit occur as both ductile deformed and disseminated-massive types. The deposit has been significantly mined but the genesis of the deposit is elusive. Here we report typomorphic characteristics and He-Ar, S, Pb isotopes of pyrite, intending to establish the ore genesis mechanisms of the Keluo gold deposit. Pyrite from ductile deformed ore body showed lower S/Fe ratios (mean 1.99) and As content (mean 382×10^-6), and higher Au (mean 383×10^-6), Ag (152×10^-6) and Co (1249×10^-6) contents than pyrite from disseminated-massive ores (mean S/Fe, As, Au, Ag, and Co values of 2.01, 503×10^-6, 234×10^-6, 96×10^-6, 845×10^-6, respectively). Trace elements of the two types of pyrite showed similar REE features, i.e. enriched LREE, depleted HREE, and inclined REE patterns. The total REE content of pyrite ranged from 17.00×10^-6 to 66.95×10^-6 with deformed pyrite showing lower REE concentrations, and LREE/HREE ratios ranged from 5.25 to 12.50. The large variations in Y/Ho, Zr/Hf and Nb/Ta ratios indicate an unstable ore-forming environment. Moreover, the ³He and ⁴He values of pyrite were (2.405-10.811)×10^-13 and (3.35-4.99)×10^-7, respectively. The ³He vs. ⁴He and R/R_a vs. ⁴⁰Ar/³⁶Ar discrimination diagrams indicated a dominated mantle source with minor contribution from continental crust, further implying that the meteoric water played a vital role during gold mineralization. The δ ³⁴S values of pyrite ranged from +2.3‰ to +7.6‰ showing lower δ³⁴S values for deformed pyrite than disseminated-massive pyrite, with mean values of +2.65‰ and +5.07‰, respectively. The Pb isotopic study of pyrite showed that the ratios²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb ranged in 18.157-18.211, 15.542-15.594 and 38.032-38.218, respectively, and all these values indicate great affinity with ore genesis. Pb isotopic compositions further show that deformed pyrite has relatively low mean values of ²⁰⁶Pb/²⁰⁴Pb (18.171), ²⁰⁷Pb/²⁰⁴Pb (15.542), and ²⁰⁸Pb/²⁰⁴Pb (38.054), as compared with those of disseminated-massive pyrite (18.200, 15.581 and 38.172, respectively). The Co/Ni ratios and Co vs. Ni discrimination diagram indicate that the Keluo deposit belongs to the hydrothermal type, whereas the w(Fe+S) vs. w(As) and Co-Ni-As diagrams indicate that the main mineralization stage exhibits epithermal characteristic. Combined with previous regional deformation events, deposit features, geochronological and fluid inclusion studies, we conclude that there are two stages of mineralization in the Keluo deposit, including the Triassic orogenic and the later Cretaceous epithermal type. Based on this study, we propose that more attention should be paid to orogenic Au during ore prospecting in the Heihe-Nenjiang tectonic melange belt.

Key words: typomorphic characteristics, He-Ar,S,Pb isotopes, pyrite, Keluo gold deposit, Nenjiang-Heihe, Heilongjiang Province

中图分类号:

李成禄, 李胜荣, 袁茂文, 杜兵盈, 李文龙, Masroor ALAM, 刘东园, 刘浩. 黑龙江省嫩江—黑河构造混杂岩带科洛金矿床成因:来自黄铁矿化学成分及He-Ar、S、Pb同位素证据[J]. 地学前缘, 2020, 27(5): 99-115.

LI Chenglu, LI Shengrong, YUAN Maowen, DU Bingying, LI Wenlong, Masroor ALAM, LIU Dongyuan, LIU Hao. Genesis of the Keluo Au deposit in the Nenjiang-Heihe tectonic melange belt, Heilongjiang Province: evidence from chemical composition and pyrite He-Ar, S, Pb isotopes[J]. Earth Science Frontiers, 2020, 27(5): 99-115.

图/表 17

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矿床名称	矿区中心经、纬度	资源量/t	矿床平均品位/ (g·t^-1)	赋矿围岩	主要围岩蚀变	矿石类型	形成时代/ Ma	矿床成因类型	文献来源
三道湾子金矿	127°00'00″E,50°21'55″N	大于25	大于15	白垩系龙江组粗面安山岩、玄武粗安岩	硅化、绢云母化、黏土化、青磐岩化等	石英脉	119.1	低温热液型	[11-12]
永新金矿	125°56'55″E,49°41'38″N	大于20	3.5	石炭纪花岗岩与糜棱岩接触带	硅化、钾化、绢云母化、绿泥石化等	热液蚀变角砾岩	114.6	低温热液型	[13-16]
二道坎银矿	125°48'51″E,50°04'52″N	大于1 500 (Ag)	557.6(Ag)	上志留统—中泥盆统泥鳅河组凝灰质砂岩、泥岩	硅化、绢云母化、绿泥石化	石英脉胶结角砾岩	232.9	低温热液型	[17-18]
大新屯金矿	127°07'33″E,50°53'14″N	大于5	3.4	新元古界—下寒武统北宽河组二云片岩	硅化、绢云母化、绿泥石化、碳酸盐化	糜棱片岩	152.8	韧性剪切带型	[19]
上马场金矿	127°16'15″E,50°22'15″N	大于11	4.2	白垩系龙江组安山岩、粗面安山岩	硅化、绿泥石化、绿帘石化、碳酸盐化	蚀变岩	113.6	低温热液型	[20]
孟德河金矿	126°13'13″E,49°54'13″N	大于11	1.8	新元古界—下寒武统北宽河组二云片岩	硅化、绢(白)云母化、绿泥石化、碳酸盐化	糜棱片岩	209.6	韧性剪切带型	[22-23,27]
三合屯金矿	125°33'30″E,49°21'34″N	大于5	大于2.7	白垩系嫩江组、光华组地层与糜棱岩接触带	硅化、钾化、绢云母化、绿泥石化等	热液蚀变角砾岩	早白垩世	低温热液型	[26,28]

矿床名称	矿区中心经、纬度	资源量/t	矿床平均品位/ (g·t^-1)	赋矿围岩	主要围岩蚀变	矿石类型	形成时代/ Ma	矿床成因类型	文献来源
三道湾子金矿	127°00'00″E,50°21'55″N	大于25	大于15	白垩系龙江组粗面安山岩、玄武粗安岩	硅化、绢云母化、黏土化、青磐岩化等	石英脉	119.1	低温热液型	[11-12]
永新金矿	125°56'55″E,49°41'38″N	大于20	3.5	石炭纪花岗岩与糜棱岩接触带	硅化、钾化、绢云母化、绿泥石化等	热液蚀变角砾岩	114.6	低温热液型	[13-16]
二道坎银矿	125°48'51″E,50°04'52″N	大于1 500 (Ag)	557.6(Ag)	上志留统—中泥盆统泥鳅河组凝灰质砂岩、泥岩	硅化、绢云母化、绿泥石化	石英脉胶结角砾岩	232.9	低温热液型	[17-18]
大新屯金矿	127°07'33″E,50°53'14″N	大于5	3.4	新元古界—下寒武统北宽河组二云片岩	硅化、绢云母化、绿泥石化、碳酸盐化	糜棱片岩	152.8	韧性剪切带型	[19]
上马场金矿	127°16'15″E,50°22'15″N	大于11	4.2	白垩系龙江组安山岩、粗面安山岩	硅化、绿泥石化、绿帘石化、碳酸盐化	蚀变岩	113.6	低温热液型	[20]
孟德河金矿	126°13'13″E,49°54'13″N	大于11	1.8	新元古界—下寒武统北宽河组二云片岩	硅化、绢(白)云母化、绿泥石化、碳酸盐化	糜棱片岩	209.6	韧性剪切带型	[22-23,27]
三合屯金矿	125°33'30″E,49°21'34″N	大于5	大于2.7	白垩系嫩江组、光华组地层与糜棱岩接触带	硅化、钾化、绢云母化、绿泥石化等	热液蚀变角砾岩	早白垩世	低温热液型	[26,28]

序号	样品号	w_B/%																	S/Fe
序号	样品号	S	Fe	Au	Ag	Co	Ni	As	Sb	Se	Te	Bi	Cd	Ge	Zn	Pb	Cu	Total	S/Fe
1	Zk21B06-51	52.33	46.32	—	0.03	0.05	—	0.10	—	—	0.04	—	—	—	0.00	—	—	98.87	1.97
2	Zk21B06-11	53.34	46.42	0.06	0.04	0.06	—	0.03	0.00	—	—	—	—	—	—	—	0.01	99.95	2.00
3	Zk2105-11	52.96	46.37	0.05	—	0.09	—	0.04	0.00	—	—	—	0.02	—	—	—	0.03	99.56	1.99
4	Zk2105-191	52.78	46.40	—	—	0.05	—	0.07	—	0.01	0.03	—	—	—	—	—	—	99.35	1.98
5	Zk2105-71	53.41	46.46	0.03	—	0.09	—	0.04	0.05	—	0.03	—	—	—	—	0.02	0.01	100.13	2.00
6	Zk2105-151	53.00	46.06	0.03	0.00	0.12	—	0.04	—	—	0.01	—	0.01	—	—	—	0.02	99.29	2.00
7	Zk2104-261	53.04	46.35	—	—	0.18	—	0.01	—	—	0.01	—	—	—	0.01	—	0.01	99.61	1.99
8	Zk1904-11	53.27	46.73	0.01	0.03	0.04	—	—	0.01	—	0.01	—	0.01	—	—	—	0.00	100.11	1.99
9	Zk0302-61	53.24	46.66	0.01	—	0.11	—	0.07	—	0.03	0.00	—	0.03	—	—	—	—	100.15	1.99
10	Zk2104-1-71	53.40	46.46	0.01	—	0.08	—	—	0.01	—	0.03	—	—	—	—	0.08	0.01	100.08	2.00
11	Zk2104-151	53.31	46.64	—	—	0.06	—	—	0.01	0.01	—	—	—	—	—	—	0.01	100.03	1.99
12	Zk0704-81	53.59	46.85	0.00	0.02	0.19	—	0.06	—	—	—	—	—	—	0.04	—	—	100.75	1.99
13	Zk2104-351	53.34	46.38	—	0.07	0.19	—	0.04	0.03	—	0.03	—	—	—	0.01	—	0.03	100.10	2.00
14	Zk0302-51	53.12	46.37	—	0.04	0.05	—	0.08	—	—	—	—	—	—	—	—	0.05	99.70	2.00
15	Zk1706-11	53.45	46.56	0.05	—	0.10	—	0.08	0.01	0.01	—	—	0.03	—	—	—	—	100.30	2.00
16	Zk19B06-31	53.01	46.14	0.03	—	0.05	—	0.04	0.05	0.01	0.01	—	0.03	—	—	—	0.04	99.40	2.00
17	Zk2105-51	53.38	46.31	0.03	—	0.06	0.07	0.09	0.00	—	0.01	—	0.01	—	0.09	—	0.03	100.07	2.01
18	Zk2105-221	53.82	46.17	—	0.02	0.09	—	0.02	—	—	—	—	0.02	—	—	—	0.03	100.17	2.03
19	Zk1908-21	53.49	46.53	—	—	0.10	—	0.02	0.00	0.02	—	—	0.02	—	0.05	—	0.05	100.28	2.00
20	Zk1908-51	53.33	46.38	0.02	0.00	0.08	—	0.20	—	—	0.01	—	0.01	—	—	0.02	—	100.05	2.00
21	Zk2104-3191	53.08	45.94	—	0.00	0.07	—	0.04	0.00	0.01	0.03	—	0.02	—	—	—	0.05	99.23	2.01
22	Zk0704-51	53.45	46.21	0.01	0.00	0.07	—	0.04	—	—	—	—	0.02	—	—	—	—	99.79	2.02
23	Zk0302-81	53.40	46.40	0.02	—	0.05	—	0.02	0.01	—	—	—	0.02	—	0.08	—	0.01	100.01	2.00
24	Zk2104-3171	52.93	45.99	—	0.02	0.04	—	0.09	—	0.05	—	—	0.02	—	—	—	—	99.15	2.00
25	Zk170621	53.50	46.48	0.01	0.01	0.10	—	0.10	—	—	0.00	—	—	—	—	—	0.04	100.24	2.00
26	Zk2104-2151	53.40	46.39	0.05	—	0.09	—	0.04	—	—	—	—	0.00	—	—	—	—	99.97	2.01
27	Zk2702-31	53.04	46.06	0.02	—	0.07	—	0.00	—	0.02	—	—	0.02	—	—	—	—	99.23	2.01
28	Zk2105-261	53.17	46.16	0.01	0.02	0.09	—	—	0.02	—	—	—	—	—	—	—	0.02	99.49	2.01
29	Zk2105-21	53.37	46.34	—	—	0.06	—	0.05	0.03	0.01	—	—	0.02	—	—	—	—	99.87	2.01
30	Zk2104-3121	53.01	46.00	—	—	0.06	—	—	—	0.04	0.04	—	—	0.01	0.01	—	0.01	99.18	2.01
31	Zk1706-31	53.39	46.31	0.01	—	0.07	—	0.01	—	—	—	—	0.02	—	0.02	—	0.01	99.82	2.01
32	Zk19B06-61	53.30	46.22	0.02	0.02	0.07	—	0.02	—	—	—	—	0.00	—	0.03	—	—	99.67	2.01
33	Zk2105-231	53.33	46.21	—	—	0.07	—	—	0.04	—	—	—	0.03	—	0.03	0.03	—	99.73	2.01
34	Zk21B06-21	52.92	45.82	0.02	0.02	0.20	—	0.04	0.06	—	—	—	—	—	0.02	—	0.02	99.08	2.01
35	Zk0704-41	53.32	46.05	—	—	0.05	—	0.02	0.01	0.01	0.01	—	0.01	—	—	—	—	99.48	2.02
36	Zk2702-61	53.25	46.04	0.01	0.01	0.07	—	0.05	—	—	0.01	—	—	0.01	—	0.04	0.00	99.47	2.02
37	Zk1904-31	53.56	46.11	—	0.01	0.09	—	0.04	—	0.02	0.01	—	0.02	—	0.02	—	—	99.88	2.02
38	Zk1706-61	53.54	46.22	—	0.04	0.11	—	0.05	0.05	0.01	0.03	—	0.02	—	0.05	—	0.01	100.14	2.02
39	Zk2105-1-71	53.74	45.27	—	—	0.08	—	0.07	0.01	—	—	—	—	—	0.00	—	—	99.17	2.07
40	Zk2105-162	54.65	45.66	0.04	—	0.07	—	0.00	—	—	—	—	0.00	—	0.04	0.04	—	100.51	2.08
41	Zk1706-41	53.55	47.03	—	0.03	0.10	—	0.04	0.01	—	—	—	0.03	—	—	—	—	100.78	1.98
42	Zk1706-111	53.11	46.55	0.05	0.01	0.21	—	0.08	0.01	—	0.07	—	—	—	—	—	0.02	100.10	1.99
43	Zk0701-51	53.00	46.23	0.02	—	0.11	—	—	0.02	0.05	—	—	0.01	—	—	—	—	99.43	2.00
44	Zk0701-41	53.39	46.28	—	0.01	0.06	—	0.04	0.01	0.01	—	—	0.01	—	0.03	—	0.01	99.84	2.01
45	Zk21B06-71	53.15	46.33	—	0.02	0.08	—	—	0.02	0.03	0.01	—	—	—	—	—	0.01	99.65	2.00
46	Zk21B06-12	53.08	46.68	0.05	—	0.03	—	0.02	0.04	0.00	—	—	—	—	0.07	—	0.00	99.97	1.98
47	Zk21B06-22	53.13	46.38	—	—	0.34	—	0.01	0.03	—	—	—	0.02	—	—	—	—	99.92	2.00
48	Zk1101-71	53.60	46.39	—	—	0.08	—	—	0.00	—	0.02	—	—	—	—	—	0.03	100.13	2.01

序号	样品号	w_B/%																	S/Fe
序号	样品号	S	Fe	Au	Ag	Co	Ni	As	Sb	Se	Te	Bi	Cd	Ge	Zn	Pb	Cu	Total	S/Fe
1	Zk21B06-51	52.33	46.32	—	0.03	0.05	—	0.10	—	—	0.04	—	—	—	0.00	—	—	98.87	1.97
2	Zk21B06-11	53.34	46.42	0.06	0.04	0.06	—	0.03	0.00	—	—	—	—	—	—	—	0.01	99.95	2.00
3	Zk2105-11	52.96	46.37	0.05	—	0.09	—	0.04	0.00	—	—	—	0.02	—	—	—	0.03	99.56	1.99
4	Zk2105-191	52.78	46.40	—	—	0.05	—	0.07	—	0.01	0.03	—	—	—	—	—	—	99.35	1.98
5	Zk2105-71	53.41	46.46	0.03	—	0.09	—	0.04	0.05	—	0.03	—	—	—	—	0.02	0.01	100.13	2.00
6	Zk2105-151	53.00	46.06	0.03	0.00	0.12	—	0.04	—	—	0.01	—	0.01	—	—	—	0.02	99.29	2.00
7	Zk2104-261	53.04	46.35	—	—	0.18	—	0.01	—	—	0.01	—	—	—	0.01	—	0.01	99.61	1.99
8	Zk1904-11	53.27	46.73	0.01	0.03	0.04	—	—	0.01	—	0.01	—	0.01	—	—	—	0.00	100.11	1.99
9	Zk0302-61	53.24	46.66	0.01	—	0.11	—	0.07	—	0.03	0.00	—	0.03	—	—	—	—	100.15	1.99
10	Zk2104-1-71	53.40	46.46	0.01	—	0.08	—	—	0.01	—	0.03	—	—	—	—	0.08	0.01	100.08	2.00
11	Zk2104-151	53.31	46.64	—	—	0.06	—	—	0.01	0.01	—	—	—	—	—	—	0.01	100.03	1.99
12	Zk0704-81	53.59	46.85	0.00	0.02	0.19	—	0.06	—	—	—	—	—	—	0.04	—	—	100.75	1.99
13	Zk2104-351	53.34	46.38	—	0.07	0.19	—	0.04	0.03	—	0.03	—	—	—	0.01	—	0.03	100.10	2.00
14	Zk0302-51	53.12	46.37	—	0.04	0.05	—	0.08	—	—	—	—	—	—	—	—	0.05	99.70	2.00
15	Zk1706-11	53.45	46.56	0.05	—	0.10	—	0.08	0.01	0.01	—	—	0.03	—	—	—	—	100.30	2.00
16	Zk19B06-31	53.01	46.14	0.03	—	0.05	—	0.04	0.05	0.01	0.01	—	0.03	—	—	—	0.04	99.40	2.00
17	Zk2105-51	53.38	46.31	0.03	—	0.06	0.07	0.09	0.00	—	0.01	—	0.01	—	0.09	—	0.03	100.07	2.01
18	Zk2105-221	53.82	46.17	—	0.02	0.09	—	0.02	—	—	—	—	0.02	—	—	—	0.03	100.17	2.03
19	Zk1908-21	53.49	46.53	—	—	0.10	—	0.02	0.00	0.02	—	—	0.02	—	0.05	—	0.05	100.28	2.00
20	Zk1908-51	53.33	46.38	0.02	0.00	0.08	—	0.20	—	—	0.01	—	0.01	—	—	0.02	—	100.05	2.00
21	Zk2104-3191	53.08	45.94	—	0.00	0.07	—	0.04	0.00	0.01	0.03	—	0.02	—	—	—	0.05	99.23	2.01
22	Zk0704-51	53.45	46.21	0.01	0.00	0.07	—	0.04	—	—	—	—	0.02	—	—	—	—	99.79	2.02
23	Zk0302-81	53.40	46.40	0.02	—	0.05	—	0.02	0.01	—	—	—	0.02	—	0.08	—	0.01	100.01	2.00
24	Zk2104-3171	52.93	45.99	—	0.02	0.04	—	0.09	—	0.05	—	—	0.02	—	—	—	—	99.15	2.00
25	Zk170621	53.50	46.48	0.01	0.01	0.10	—	0.10	—	—	0.00	—	—	—	—	—	0.04	100.24	2.00
26	Zk2104-2151	53.40	46.39	0.05	—	0.09	—	0.04	—	—	—	—	0.00	—	—	—	—	99.97	2.01
27	Zk2702-31	53.04	46.06	0.02	—	0.07	—	0.00	—	0.02	—	—	0.02	—	—	—	—	99.23	2.01
28	Zk2105-261	53.17	46.16	0.01	0.02	0.09	—	—	0.02	—	—	—	—	—	—	—	0.02	99.49	2.01
29	Zk2105-21	53.37	46.34	—	—	0.06	—	0.05	0.03	0.01	—	—	0.02	—	—	—	—	99.87	2.01
30	Zk2104-3121	53.01	46.00	—	—	0.06	—	—	—	0.04	0.04	—	—	0.01	0.01	—	0.01	99.18	2.01
31	Zk1706-31	53.39	46.31	0.01	—	0.07	—	0.01	—	—	—	—	0.02	—	0.02	—	0.01	99.82	2.01
32	Zk19B06-61	53.30	46.22	0.02	0.02	0.07	—	0.02	—	—	—	—	0.00	—	0.03	—	—	99.67	2.01
33	Zk2105-231	53.33	46.21	—	—	0.07	—	—	0.04	—	—	—	0.03	—	0.03	0.03	—	99.73	2.01
34	Zk21B06-21	52.92	45.82	0.02	0.02	0.20	—	0.04	0.06	—	—	—	—	—	0.02	—	0.02	99.08	2.01
35	Zk0704-41	53.32	46.05	—	—	0.05	—	0.02	0.01	0.01	0.01	—	0.01	—	—	—	—	99.48	2.02
36	Zk2702-61	53.25	46.04	0.01	0.01	0.07	—	0.05	—	—	0.01	—	—	0.01	—	0.04	0.00	99.47	2.02
37	Zk1904-31	53.56	46.11	—	0.01	0.09	—	0.04	—	0.02	0.01	—	0.02	—	0.02	—	—	99.88	2.02
38	Zk1706-61	53.54	46.22	—	0.04	0.11	—	0.05	0.05	0.01	0.03	—	0.02	—	0.05	—	0.01	100.14	2.02
39	Zk2105-1-71	53.74	45.27	—	—	0.08	—	0.07	0.01	—	—	—	—	—	0.00	—	—	99.17	2.07
40	Zk2105-162	54.65	45.66	0.04	—	0.07	—	0.00	—	—	—	—	0.00	—	0.04	0.04	—	100.51	2.08
41	Zk1706-41	53.55	47.03	—	0.03	0.10	—	0.04	0.01	—	—	—	0.03	—	—	—	—	100.78	1.98
42	Zk1706-111	53.11	46.55	0.05	0.01	0.21	—	0.08	0.01	—	0.07	—	—	—	—	—	0.02	100.10	1.99
43	Zk0701-51	53.00	46.23	0.02	—	0.11	—	—	0.02	0.05	—	—	0.01	—	—	—	—	99.43	2.00
44	Zk0701-41	53.39	46.28	—	0.01	0.06	—	0.04	0.01	0.01	—	—	0.01	—	0.03	—	0.01	99.84	2.01
45	Zk21B06-71	53.15	46.33	—	0.02	0.08	—	—	0.02	0.03	0.01	—	—	—	—	—	0.01	99.65	2.00
46	Zk21B06-12	53.08	46.68	0.05	—	0.03	—	0.02	0.04	0.00	—	—	—	—	0.07	—	0.00	99.97	1.98
47	Zk21B06-22	53.13	46.38	—	—	0.34	—	0.01	0.03	—	—	—	0.02	—	—	—	—	99.92	2.00
48	Zk1101-71	53.60	46.39	—	—	0.08	—	—	0.00	—	0.02	—	—	—	—	—	0.03	100.13	2.01

样品号	w_B/10^-6
样品号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y
Zk2105-2	7.17	13.60	1.72	6.90	1.250	0.207	0.756	0.102	0.374	0.067	0.234	0.041	0.312	0.052	1.70
Zk2105-1	8.98	18.10	2.16	8.55	1.510	0.262	1.060	0.125	0.544	0.086	0.281	0.039	0.282	0.031	2.16
Zk2104	6.64	16.10	1.86	8.22	1.500	0.221	1.200	0.158	0.784	0.139	0.359	0.065	0.387	0.068	3.42
Zk1906	5.64	13.50	1.48	6.50	1.100	0.187	0.833	0.095	0.428	0.085	0.200	0.037	0.221	0.036	2.09
Zk0903	8.16	16.80	2.16	8.16	1.360	0.261	0.957	0.122	0.451	0.083	0.223	0.036	0.258	0.037	2.03
Zk1902	13.50	25.00	3.15	12.90	2.220	0.464	1.670	0.255	1.090	0.198	0.630	0.088	0.537	0.079	5.17
Zk21B02	3.26	7.03	0.83	3.13	0.596	0.096	0.507	0.061	0.240	0.041	0.115	0.018	0.113	0.017	0.95
Zk2108	9.29	17.90	2.34	8.06	1.340	0.208	0.843	0.109	0.377	0.055	0.159	0.024	0.139	0.019	1.40
样品号	w_B/10^-6
样品号	Rb	Ba	Th	U	Ta	Nb	Sr	Zr	Hf	Ga	Cs	W	Co	Ni	Cu
Zk2105-2	1.31	8.93	2.18	0.820	0.002	0.210	4.58	17.90	0.541	1.03	0.040	1.540	146	190	115
Zk2105-1	3.67	11.60	2.72	0.724	0.015	0.228	5.38	10.20	0.291	1.65	0.108	0.799	352	528	155
Zk2104	3.89	45.70	2.73	1.770	0.022	1.070	14.80	17.00	0.387	1.43	0.117	19.000	334	183	303
Zk1906	1.63	6.66	1.86	2.070	0.002	0.314	6.86	2.77	0.107	1.30	0.034	0.525	370	191	348
Zk0903	2.03	11.30	3.96	3.190	0.029	0.096	3.22	3.91	0.164	1.40	0.046	3.510	245	114	43
Zk1902	3.18	12.10	4.57	19.600	0.011	0.514	5.42	5.71	0.205	1.82	0.187	1.160	554	189	208
Zk21B02	2.49	7.00	1.20	0.202	0.002	0.211	3.73	2.75	0.092	1.11	0.058	0.916	323	556	546
Zk2108	4.00	114.00	3.20	2.560	0.008	0.079	4.77	5.30	0.077	1.66	0.067	0.499	129	134	61
样品号	w_B/10^-6
样品号	Pb	Zn	Bi	Li	Be	Sc	V	Cr	Mo	Cd	Sb	Tl	∑REE	LREE	HREE
Zk2105-2	55 262	1 638	35.70	0.62	0.011	0.488	1.05	0.991	12.700	25.50	7.78	0.293	34.49	30.85	3.64
Zk2105-1	1 059	161	7.16	2.57	0.058	1.170	2.53	3.700	2.660	2.61	2.78	0.103	44.17	39.56	4.61
Zk2104	4 233	837	8.95	2.74	0.044	2.130	2.00	2.490	16.20	13.80	5.82	0.123	41.12	34.54	6.58
Zk1906	3 178	1 137	14.60	2.06	0.06	0.467	1.62	1.270	5.260	22.80	1.83	0.066	32.43	28.41	4.03
Zk0903	3 205	2 895	62.50	1.75	0.038	0.869	1.61	0.896	8.100	39.00	2.59	0.245	41.10	36.90	4.20
Zk1902	1 661	105	27.20	1.51	0.028	1.050	3.52	0.968	7.150	1.30	4.33	0.474	66.95	57.23	9.72
Zk21B02	608	139	21.60	2.47	0.045	0.304	1.54	1.700	0.417	2.64	1.25	0.022	17.00	14.94	2.06
Zk2108	106	18	14.00	2.12	0.024	1.080	2.38	2.600	5.340	0.09	1.51	0.041	42.26	39.14	3.13
样品号	∑Ce/ ∑Y	(La/ Yb)_N	(La/ Lu)_N	(Ce/ Yb)_N	(La/ Sm)_N	(Gd/ Yb)_N	δEu	Hf/Sm	Nb/La	Th/La	Y/Ho	Zr/Hf	Nb/Ta	Co/Ni	Sr/Ba
Zk2105-2	8.48	16.48	14.78	12.11	3.70	2.00	0.60	0.43	0.03	0.30	25.37	33.09	105.00	0.77	0.51
Zk2105-1	8.58	22.84	31.05	17.83	3.84	3.11	0.60	0.19	0.03	0.30	25.12	35.05	15.20	0.67	0.46
Zk2104	5.25	12.31	10.47	11.56	2.86	2.57	0.49	0.26	0.16	0.41	24.60	43.93	48.64	1.83	0.32
Zk1906	7.05	18.31	16.79	16.97	3.31	3.12	0.57	0.10	0.06	0.33	24.59	25.89	157.00	1.94	1.03
Zk0903	8.79	22.69	23.64	18.09	3.87	3.07	0.66	0.12	0.01	0.49	24.46	23.84	3.31	2.15	0.28
Zk1902	5.89	18.03	18.31	12.93	3.93	2.57	0.71	0.09	0.04	0.34	26.11	27.85	46.73	2.93	0.45
Zk21B02	7.25	20.69	20.55	17.28	3.53	3.71	0.52	0.15	0.06	0.37	23.17	29.89	105.50	0.58	0.53
Zk2108	12.50	47.94	52.40	35.77	4.48	5.02	0.56	0.06	0.01	0.34	25.45	68.83	9.88	0.96	0.04