The characteristics of trace elements and S, Pb, He and Ar isotopes in the Liyuan gold deposit in Shanxi Province, and their significance

doi:10.13745/j.esf.sf.2020.3.27

Abstract

Abstract:

The Liyuan gold deposit is an exploration breakthrough at the inner North China Craton in recent years. It has many types of mineralization with high research values. The Liyuan gold deposit occurs in the archaean Fuping group gneiss and mixed rocked granite, controlled by the NNE fault in the area, and mainly consists of explosive breccia-type orebody and quartz vein-type orebody. Ore minerals are mainly pyrite, galena and sphalerite, while gangue minerals are mainly quartz, sericite and K-feldspar, and alteration is mainly silicification, K-feldspar, sericitization and chloritization.The δ³⁴S values of pyrite, chalcopyrite and sphalerite are 0.9‰-4.3‰, with an average of 3.0‰, which indicates that the source of sulfur mainly comes from the magma fluids.The δ³⁴S values of galena are -12.8‰-1.4‰, with an average of -4.2‰. The increase in pH value may be the cause of the high negative δ³⁴S value of galena. The variation range of Pb isotopes of metal sulfides is relatively small, and²⁰⁶Pb/²⁰⁴Pb values are 16.697-16.890,²⁰⁷Pb/²⁰⁴Pb values are 15.239-15.267,²⁰⁸Pb/²⁰⁴Pb values are 42.186-45.334, all of which fall near the evolution line of the lower crust. These variations indicate that the ore-forming fluid may have drenched the rich lower crust materials during the migration process. The³He/⁴He of pyrite is 0.27-1.04 R_a,⁴⁰Ar/³⁶Ar is 1194.61-5488.80, and³⁸Ar/³⁶Ar is 0.204-0.218, which indicates that the ore-forming fluid is mainly from the crust and partly from the mantle fluid, with the characteristics of magma fluid mixed with the crust and mantle. The characteristics of trace elements indicate that pyrite has the characteristics of magmatic-hydrothermal pyrite, and some materials of diabase vein and quartz porphyry may have been involved in the mineralization process. In conclusion, the Liyuan gold deposit is considered to be the magmatic-hydrothermal gold deposit related to the shallow magmatic intrusion. And the difference in REE and S-Pb-He-Ar isotopes, between the two types, is mainly due to the different precipitation mechanisms and mineral crystallization processes of the explosive breccia-type and quartz vein-type orebodies. In the deep part of the Liyuan gold deposit, it is possible to search for the veinlet-disseminated orebodies, and its mineralization is another specific manifestation of Yanshanian tectono-magmatic activity in the central Taihang Mountains.

Key words: trace elements, S, Pb, He and Ar isotopes, Liyuan gold deposit, central Taihang Mountains

CLC Number:

ZHEN Shimin, PANG Zhenshan, ZHU Xiaoqiang, XUE Jianling, FANG Yongcai, JIA Hongxiang, SHI Guangyao, WANG Dazhao, ZHA Zhongjian, SONG Xiaohang. The characteristics of trace elements and S, Pb, He and Ar isotopes in the Liyuan gold deposit in Shanxi Province, and their significance[J]. Earth Science Frontiers, 2020, 27(2): 373-390.

Figures/Tables 15

References 93

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编号	样品号	采样位置	矿石/岩石类型
1	LYC-5-2	矿区13中段2#矿体	石英脉型矿体
2	LYC-9	矿区14中段1#矿体	角砾岩型矿体
3	LYC-10	矿区14中段1#矿体	角砾岩型矿体
4	LYC-11	矿区14中段1#矿体	角砾岩型矿体
5	LYC-12	矿区14中段1#矿体	角砾岩型矿体
6	LYC-13-2	矿区13中段1#矿体	角砾岩型矿体
7	LYC-15-2	矿区外围,四里四村	花岗斑岩
8	LYC-16-2	矿区外围,四里四村	花岗斑岩
9	LYC-17-1	矿区外围,四里四村	花岗斑岩
10	LYC-17-2	矿区外围,四里四村	花岗斑岩
11	LYC-17-3	矿区外围,四里四村	花岗斑岩
12	LYC-17-4	矿区外围,四里四村	花岗斑岩
13	LYC-19-1	矿区外围,四里四村	花岗斑岩
14	LYC-19-2	矿区外围,四里四村	花岗斑岩
15	LYC-20	矿区外围,四里四村	花岗斑岩
16	LYC-21-1	矿区16中段2#矿体	石英脉型矿体
17	LYC-26-1	矿区	石英斑岩
18	LYC-29	矿区14中段1#矿体	石英脉型矿体
19	LYC-32	矿区14中段1#矿体	角砾岩型矿体
20	LYC-33	矿区14中段2#矿体	石英脉型矿体
21	LYC-34	矿区14中段2#矿体	石英脉型矿体
22	LYC-36	矿区11中段2#矿体	石英脉型矿体
23	LYC-37	矿区11中段2#矿体	石英脉型矿体
24	LYC-38	矿区16中段2#矿体	石英脉型矿体
25	LYC-39-1	矿区16中段1#矿体	角砾岩型矿体
26	LYC-39-2	矿区16中段1#矿体	角砾岩型矿体
27	LYC-41	矿区16中段1#矿体	角砾岩型矿体
28	LYC-42	矿区16中段1#矿体	角砾岩型矿体
29	LYC-45	矿区16中段1#矿体	角砾岩型矿体
30	LYC-47	矿区16中段1#矿体	角砾岩型矿体
31	LYC-50	矿区16中段1#矿体	角砾岩型矿体
32	LYC-51	矿区16中段1#矿体	角砾岩型矿体
33	LYC-55	矿区16中段1#矿体	角砾岩型矿体
34	LYC-57	矿区13中段1#矿体	角砾岩型矿体
35	LYC-58	矿区13中段1#矿体	角砾岩型矿体
36	LYC-60	矿区15中段1#矿体	角砾岩型矿体

编号	样品号	采样位置	矿石/岩石类型
1	LYC-5-2	矿区13中段2#矿体	石英脉型矿体
2	LYC-9	矿区14中段1#矿体	角砾岩型矿体
3	LYC-10	矿区14中段1#矿体	角砾岩型矿体
4	LYC-11	矿区14中段1#矿体	角砾岩型矿体
5	LYC-12	矿区14中段1#矿体	角砾岩型矿体
6	LYC-13-2	矿区13中段1#矿体	角砾岩型矿体
7	LYC-15-2	矿区外围,四里四村	花岗斑岩
8	LYC-16-2	矿区外围,四里四村	花岗斑岩
9	LYC-17-1	矿区外围,四里四村	花岗斑岩
10	LYC-17-2	矿区外围,四里四村	花岗斑岩
11	LYC-17-3	矿区外围,四里四村	花岗斑岩
12	LYC-17-4	矿区外围,四里四村	花岗斑岩
13	LYC-19-1	矿区外围,四里四村	花岗斑岩
14	LYC-19-2	矿区外围,四里四村	花岗斑岩
15	LYC-20	矿区外围,四里四村	花岗斑岩
16	LYC-21-1	矿区16中段2#矿体	石英脉型矿体
17	LYC-26-1	矿区	石英斑岩
18	LYC-29	矿区14中段1#矿体	石英脉型矿体
19	LYC-32	矿区14中段1#矿体	角砾岩型矿体
20	LYC-33	矿区14中段2#矿体	石英脉型矿体
21	LYC-34	矿区14中段2#矿体	石英脉型矿体
22	LYC-36	矿区11中段2#矿体	石英脉型矿体
23	LYC-37	矿区11中段2#矿体	石英脉型矿体
24	LYC-38	矿区16中段2#矿体	石英脉型矿体
25	LYC-39-1	矿区16中段1#矿体	角砾岩型矿体
26	LYC-39-2	矿区16中段1#矿体	角砾岩型矿体
27	LYC-41	矿区16中段1#矿体	角砾岩型矿体
28	LYC-42	矿区16中段1#矿体	角砾岩型矿体
29	LYC-45	矿区16中段1#矿体	角砾岩型矿体
30	LYC-47	矿区16中段1#矿体	角砾岩型矿体
31	LYC-50	矿区16中段1#矿体	角砾岩型矿体
32	LYC-51	矿区16中段1#矿体	角砾岩型矿体
33	LYC-55	矿区16中段1#矿体	角砾岩型矿体
34	LYC-57	矿区13中段1#矿体	角砾岩型矿体
35	LYC-58	矿区13中段1#矿体	角砾岩型矿体
36	LYC-60	矿区15中段1#矿体	角砾岩型矿体

编号	样品号	测定矿物	δ³⁴S/‰	数据来源
1	LYC-5-2	黄铁矿	3.7	本文	19	LYC-34	黄铁矿	1.6	本文
2	LYC-5-2	方铅矿	-6.4	本文	20	LYC-36	黄铁矿	2.8	本文
3	LYC-9	黄铁矿	3.8	本文	21	LYC-37	黄铁矿	0.9	本文
4	LYC-10	黄铁矿	4.2	本文	22	LYC-38	黄铁矿	3.6	本文
5	LYC-10	方铅矿	-0.9	本文	23	LYC-38	方铅矿	-2.8	本文
6	LYC-11	黄铁矿	3.7	本文	24	LYC-39-1	黄铁矿	3.1	本文
7	LYC-12	黄铁矿	4.3	本文	25	LYC-41	黄铁矿	2.6	本文
8	LYC-12	方铅矿	-2.2	本文	26	LYC-42	黄铁矿	2.7	本文
9	LYC-13-2	黄铁矿	3.3	本文	27	LYC-47	黄铁矿	2.4	本文
10	LYC-13-2	方铅矿	-12.8	本文	28	LYC-50	黄铁矿	2.2	本文
11	LYC-13-2	闪锌矿	1.7	本文	29	LYC-51	黄铁矿	2.7	本文
12	LYC-21-1	黄铁矿	2.3	本文	30	LYC-55	黄铁矿	3.2	本文
13	LYC-21-1	方铅矿	-7.8	本文	31	LYC-57	黄铁矿	3.6	本文
14	LYC-29	黄铁矿	3.8	本文	32	LYC-57	方铅矿	1.4	本文
15	LYC-32	黄铁矿	3.8	本文	33	LYC-57	闪锌矿	2.8	本文
16	LYC-32	方铅矿	-2.1	本文	34	LYC-57	黄铜矿	2.5	本文
17	LYC-32	闪锌矿	2.4	本文	35	LYC-58	黄铁矿	2.7	本文
18	LYC-33	黄铁矿	2.3	本文	36	LYC-60	黄铁矿	2.8	本文

编号	样品号	测定矿物	δ³⁴S/‰	数据来源
1	LYC-5-2	黄铁矿	3.7	本文	19	LYC-34	黄铁矿	1.6	本文
2	LYC-5-2	方铅矿	-6.4	本文	20	LYC-36	黄铁矿	2.8	本文
3	LYC-9	黄铁矿	3.8	本文	21	LYC-37	黄铁矿	0.9	本文
4	LYC-10	黄铁矿	4.2	本文	22	LYC-38	黄铁矿	3.6	本文
5	LYC-10	方铅矿	-0.9	本文	23	LYC-38	方铅矿	-2.8	本文
6	LYC-11	黄铁矿	3.7	本文	24	LYC-39-1	黄铁矿	3.1	本文
7	LYC-12	黄铁矿	4.3	本文	25	LYC-41	黄铁矿	2.6	本文
8	LYC-12	方铅矿	-2.2	本文	26	LYC-42	黄铁矿	2.7	本文
9	LYC-13-2	黄铁矿	3.3	本文	27	LYC-47	黄铁矿	2.4	本文
10	LYC-13-2	方铅矿	-12.8	本文	28	LYC-50	黄铁矿	2.2	本文
11	LYC-13-2	闪锌矿	1.7	本文	29	LYC-51	黄铁矿	2.7	本文
12	LYC-21-1	黄铁矿	2.3	本文	30	LYC-55	黄铁矿	3.2	本文
13	LYC-21-1	方铅矿	-7.8	本文	31	LYC-57	黄铁矿	3.6	本文
14	LYC-29	黄铁矿	3.8	本文	32	LYC-57	方铅矿	1.4	本文
15	LYC-32	黄铁矿	3.8	本文	33	LYC-57	闪锌矿	2.8	本文
16	LYC-32	方铅矿	-2.1	本文	34	LYC-57	黄铜矿	2.5	本文
17	LYC-32	闪锌矿	2.4	本文	35	LYC-58	黄铁矿	2.7	本文
18	LYC-33	黄铁矿	2.3	本文	36	LYC-60	黄铁矿	2.8	本文

编号	样品号	岩石类型	测试矿物	²⁰⁶Pb/²⁰⁴Pb	²⁰⁶Pb error	²⁰⁷Pb/²⁰⁴Pb	²⁰⁷Pb error	²⁰⁸Pb/²⁰⁴Pb	²⁰⁸Pb error	数据来源
1	LYC-09	矿石	黄铁矿	16.763 1	0.000 6	15.244 7	0.000 5	43.049 4	0.001 6	本文
2	LYC-10	矿石	黄铁矿	16.811 6	0.000 5	15.265 8	0.000 5	43.105 5	0.001 5	本文
3	LYC-12	矿石	黄铁矿	16.752 5	0.000 5	15.246 2	0.000 5	42.637 3	0.001 6	本文
4	LYC-12	矿石	方铅矿	16.740 7	0.000 5	15.241 7	0.000 5	42.6767	0.001 5	本文
5	LYC-13-2	矿石	黄铁矿	16.758 5	0.000 4	15.243 4	0.000 4	43.892 1	0.001 2	本文
6	LYC-13-2	矿石	方铅矿	16.753 4	0.000 5	15.242 1	0.000 4	43.938 7	0.001 5	本文
7	LYC-17-1	花岗斑岩	钾长石	16.883 5	0.000 5	15.287 3	0.000 5	39.021 0	0.001 3	本文
8	LYC-17-3	花岗斑岩	钾长石	16.739 2	0.000 5	15.267 8	0.000 5	39.113 8	0.001 3	本文
9	LYC-19-2	花岗斑岩	钾长石	16.444 1	0.000 4	15.240 8	0.000 4	37.219 2	0.001 3	本文
10	LYC-21-1	矿石	黄铁矿	16.862 5	0.000 4	15.255 9	0.000 3	44.181 3	0.001 2	本文
11	LYC-29	矿石	黄铁矿	16.744 6	0.000 4	15.242 3	0.000 4	42.682 3	0.001 1	本文
12	LYC-32	矿石	黄铁矿	16.815 5	0.000 5	15.256 9	0.000 5	43.395 8	0.001 6	本文
13	LYC-32	矿石	方铅矿	16.765 4	0.000 4	15.246 2	0.000 4	43.762 7	0.001 2	本文
14	LYC-33	矿石	黄铁矿	16.889 7	0.000 4	15.263 9	0.000 4	44.015 0	0.001 4	本文
15	LYC-36	矿石	黄铁矿	16.828 6	0.000 4	15.252 0	0.000 4	43.576 4	0.001 3	本文
16	LYC-37	矿石	黄铁矿	16.852 3	0.000 5	15.266 6	0.000 4	45.334 0	0.001 4	本文
17	LYC-38	矿石	黄铁矿	16.697 2	0.000 4	15.243 3	0.000 5	42.258 2	0.001 3	本文
18	LYC-39-1	矿石	黄铁矿	16.770 7	0.000 4	15.247 3	0.000 3	43.754 1	0.001 0	本文
19	LYC-39-2	石英斑岩角砾	钾长石	15.763 4	0.000 4	15.124 2	0.000 4	37.529 1	0.001 2	本文
20	LYC-41	矿石	黄铁矿	16.825 0	0.000 5	15.260 2	0.000 5	43.102 7	0.001 6	本文
21	LYC-42	矿石	黄铁矿	16.743 7	0.000 3	15.249 4	0.000 3	44.026 4	0.000 9	本文
22	LYC-42	钾化花岗岩	钾长石	15.290 3	0.000 4	15.042 5	0.000 4	36.048 8	0.001 2	本文
23	LYC-45	钾化花岗岩角砾	钾长石	15.341 8	0.000 4	15.044 4	0.000 4	36.531 2	0.001 3	本文
24	LYC-47	矿石	黄铁矿	16.794 2	0.000 4	15.251 1	0.000 5	43.910 9	0.001 2	本文
25	LYC-50	矿石	黄铁矿	16.801 9	0.000 4	15.249 0	0.000 4	44.507 0	0.001 3	本文
26	LYC-51	钾化花岗岩角砾	钾长石	15.251 3	0.000 3	15.039 0	0.000 4	35.864 2	0.001 1	本文
27	LYC-55	矿石	黄铁矿	16.825 0	0.000 5	15.264 3	0.000 5	43.330 7	0.001 5	本文
28	LYC-57	矿石	方铅矿	16.729 3	0.000 4	15.238 7	0.000 4	42.186 3	0.001 3	本文
29	LYC-57	矿石	黄铁矿	16.732 6	0.000 3	15.240 8	0.000 3	42.197 5	0.001 0	本文
30	LYC-60	矿石	黄铁矿	16.768 6	0.000 4	15.248 0	0.000 4	43.299 6	0.001 2	本文
31	15LY-23	石英斑岩	钾长石	17.053 0		15.302 0		42.279 0		Ma等^[25]
32	15LY-24	石英斑岩	钾长石	17.130 0		15.307 0		43.523 0		Ma等^[25]
33	15LY-27	石英斑岩	钾长石	16.799 0		15.271 0		41.374 0		Ma等^[25]