南秦岭新发现王庄金矿床矿物成分及其地质意义

孟五一; 张振; 高永宝; 魏立勇; 贾彬; 郑鑫; 刘宁波

doi:10.12401/j.nwg.2023178

南秦岭新发现王庄金矿床矿物成分及其地质意义

中国地质调查局西安矿产资源调查中心，陕西西安　710199

基金项目: 陕西省自然科学基础研究计划项目“南秦岭新发现王庄金矿成矿特征与矿床成因研究”（2023-JC-QN-0363），中国地质调查局项目“南秦岭旬北地区金锑找矿靶区优选与评价”（DD20230370）、“金锑锂铍矿产找矿靶区调查评价”（DD20230057）、“全国金矿重点调查区调查评价”（DD20230060）联合资助。

详细信息

作者简介: 孟五一（1989−），男，工程师，硕士研究生，研究方向为矿床学及矿床地球化学。E–mail：wuyi4960@163.com

通讯作者: 张振（1987−），男，高级工程师，硕士研究生，主要从事矿产地质调查及成矿规律研究。E–mail：545003457@qq.com。

中图分类号: P618.51

收稿日期: 2023-05-02

修回日期: 2023-09-12

录用日期: 2023-09-18

刊出日期: 2024-08-20

Material Composition and Geological Significance of the Newly Discovered Wangzhuang Gold Deposit in South Qinling

Xi'an Center of Mineral Resources Survey, China Geological Survey, Xi’an 710199, Shaanxi, China

More Information

Corresponding author: ZHANG Zhen, 545003457@qq.com

Received Date: 02 May 2023

Revised Date: 12 September 2023

Accepted Date: 18 September 2023

Publish Date: 20 August 2024

摘要

摘要:
王庄金矿是2021年南秦岭地区找矿新发现的矿床，矿床类型为微细浸染型，矿体受构造和地层双重控制，呈层间破碎带产出。王庄金矿床矿石矿物主要为毒砂、黄铁矿，通过镜下鉴定及电子探针分析，金主要以不可见金存于毒砂、含砷黄铁矿中，未见自然金。结合野外工作，根据矿物共生组合及其交生关系可将王庄金矿床划分为4个成矿阶段：I.黄铁矿、石英脉成矿早阶段；II.毒砂、黄铁矿、石英脉成矿主阶段；III.石英脉伴少量多金属硫化物阶段；IV.碳酸盐岩晚阶段。不同阶段的黄铁矿具有不同的微量元素特征：I阶段黄铁矿贫As、Au，富Fe、S；II、III阶段黄铁矿具高As、Au，低S、Fe特征，且此阶段黄铁矿当中Au、As存在一定的正相关关系。王庄金矿矿石中黄铁矿Co/Ni均值为2.03，中位数为1.34，指示成矿主阶段形成的黄铁矿有岩浆流体的加入。且在Co/Ni＜1及1.2＜Co/Ni＜2.5范围内存在两个含金集中区，表明可能存在两种不同流体的成矿作用。综合矿床地质及矿物组构特征初步认为，王庄金矿床存在多阶段的成矿作用。
- 王庄金矿 /
- 物质组成 /
- 黄铁矿 /
- 南秦岭
Abstract:
The Wangzhuang gold deposit is a newly discovered deposit in South Qinling in 2021. The ore type is a fine disseminated type. The ore body is controlled by both structure and stratum, and it is produced in an interlayer fracture zone. The main metallic minerals of the Wangzhuang gold deposit are arsenopyrite and pyrite, According to microscopic identification and electron probe analysis, the gold is mainly invisible gold in arsenopyrite and arsenian pyrite, and no natural gold is found. Based on the field work, the Wangzhuang gold deposit can be divided into four ore-forming stages: I, the early ore-forming-stage of pyrite quartz veins; II, the main stage of arsenopyrite, pyrite, and quartz veins; III, quartz veins with a small amount of polymetallic sulfide stage; IV, late carbonate stage. The pyrite in different stages has different characteristics of trace elements: stage I pyrite is poor in As and Au, rich in Fe and S; the pyrite of stage II and III are characterized by high As, Au, low S and Fe, and there is a positive correlation between Au and As in pyrite of this stage. The average Co/Ni ratio of pyrite in the Wangzhuang gold deposit is 2.03 and the median is 1.34, indicating that pyrite formed in the ore-forming master stage has the addition of magmatic fluid. In addition, there are two gold-bearing areas in the range of Co/Ni < 1 and 1.2 < Co/Ni < 2.5, indicating that there may be mineralization of two different fluids. Based on the geological and mineral fabric characteristics of the deposit, it is preliminarily concluded that there is multi-stage mineralization in the Wangzhuang gold deposit.
- the Wangzhuang gold deposit /
- material composition /
- pyrite /
- the South Qinling

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图 1 秦岭造山带构造格局与矿床分布示意图（据陈衍景, 2010b修）

Figure 1.

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图 2 镇旬盆地中带矿产地质图（a）与Au-As-W 异常分布图（b）

Figure 2.

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图 3 王庄金矿床矿区地质图

Figure 3.

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图 4 王庄金矿床7号勘探线剖面图及采样位置

Figure 4.

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图 5 王庄金矿床矿石特征、矿物组构

Figure 5.

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图 6 王庄金矿成矿阶段及矿物生成顺序

Figure 6.

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图 7 王庄金矿Au、As关系图解（数据来自表1）

Figure 7.

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图 8 王庄金矿矿石中黄铁矿Co、Ni、Au相关性图解

Figure 8.

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表 1 王庄金矿床矿石中黄铁矿、毒砂电子探针分析结果（%）

Table 1. Electron probe analysis results of pyrite and arsenopyrite in Wangzhuang gold deposit （%）

样品编号	矿物类型	As	Zn	Cu	Ni	Co	Fe	Sb	Ag	Bi	Pb	S	Au	Total
ZK7-1BT4	I-py	0.564	0	0	0.031	0.087	46.08	0	0	0.011	0.101	52.881	0	99.755
	I-py	2.508	0.007	0.012	0.022	0.054	44.983	0	0	0	0	53.724	0	101.31
	II-py	2.276	0.022	0.068	0.091	0.07	45.351	0	0.006	0	0	50.586	0	98.47
	II-py	4.218	0	0	0.01	0.069	45.376	0.021	0.029	0	0.011	50.432	0.01	100.176
	II-py	4.055	0.052	0	0.16	0.11	44.676	0.059	0	0.016	0	50.624	0	99.752
	II-py	6.68	0	0.01	0.156	0.072	44.272	0.018	0	0	0	46.418	0.018	97.644
	Apy	39.466	0	0.028	0.068	0.094	34.134	0.071	0	0	0	24.022	0.037	97.92
	Apy	41.206	0	0.04	0	0.045	34.468	0.079	0	0	0.207	23.26	0	99.305
	Apy	40.423	0	0.015	0	0.044	34.55	0.08	0.047	0	0	23.111	0.045	98.315
	Apy	42.555	0	0	0	0.089	34.585	0.019	0	0	0.049	22.65	0.029	99.976
	Apy	41.116	0	0	0.096	0.059	33.959	0.206	0.006	0	0	22.881	0	98.323
	Apy	41.975	0	0	0	0.041	34.209	0.022	0	0	0	22.648	0	98.895
	Apy	42.433	0.087	0	0	0	34.654	0.07	0.022	0	0.061	21.882	0.091	99.3
	Apy	39.188	0.013	0	0	0.07	33.597	0.077	0	0	4.009	22.57	0	99.524
	Apy	43.225	0.001	0.012	0	0.027	34.201	0	0.003	0	0	22.102	0.108	99.679
	Apy	42.925	0.015	0.01	0.011	0.03	34.03	0.006	0.009	0	0	21.999	0.017	99.052
	Apy	44.282	0.051	0	0.066	0.024	34.297	0.036	0.001	0	0.075	21.585	0	100.417
	Apy	44	0.022	0.025	0.031	0.007	33.894	0.01	0	0	0	21.782	0	99.771
ZK7-1TZ1	Apy	44.252	0.01	0	0	0.046	33.97	0.019	0	0	0	21.021	0.017	99.335
	I-py	0.074	0	0.013	0	0.039	46.113	0.036	0.004	0	0	53.708	0	99.987
	I-py	1.247	0.007	0.017	0.082	0.096	45.815	0.025	0.015	0	0.047	52.233	0	99.584
	III-py	0.647	0	0	0.106	0.401	44.042	0.032	0.004	0	0	52.629	0.003	97.864
	III-py	3.113	0	0.027	0.412	0.199	45.183	0.035	0	0	0	51.119	0	100.088
	III-py	2.417	0	0	0.116	0.168	43.772	0.064	0.021	0	0.056	50.495	0	97.109
	Apy	42.448	0.057	0.014	0	0.058	34.184	0.04	0	0	0.021	22.439	0.055	99.316
	Apy	43.778	0.019	0.052	0.034	0.043	34.3	0	0	0	0.066	21.448	0.119	99.859
	Apy	44.609	0.004	0	0	0.022	34.09	0	0.011	0	0	21.386	0.068	100.19
	Apy	41.142	0.012	0.034	0	0.059	33.175	0.101	0	0	0	21.17	0.135	95.828
ZK7-1TZ2	I-py	1.99	0.017	0.043	0.382	0.173	45.417	0	0	0	0	51.978	0	100
	I-py	0.111	0	0.062	0.018	0.097	44.793	0.034	0.003	0	0	52.656	0	97.774
	I-py	2.799	0	0.021	0.084	0.008	45.416	0	0.044	0	0	51.559	0	99.931
	I-py	2.776	0	0	0	0.038	45.561	0.022	0.007	0	0	51.232	0	99.636
	II-py	1.134	0.045	0.005	0.184	0.277	44.576	0.042	0.037	0	0	52.241	0.02	98.561
	II-py	2.444	0	0.023	0.026	0.084	44.845	0	0	0	0	51.637	0.06	99.119
	II-py	3.752	0	0.023	0	0.04	45.091	0	0.009	0	0	50.617	0.058	99.59
	II-py	3.938	0	0.003	0.999	0.44	44.02	0.017	0	0.012	0	50.332	0	99.761
	II-py	1.293	0.003	0	0.153	0.253	42.633	0.013	0.019	0	0.147	50.286	0.003	94.803
	Apy	41.809	0	0.026	0.267	0.061	34.506	0.021	0.001	0	0	23.301	0	99.992
	Apy	43.142	0	0.045	0	0.044	34.621	0.059	0	0	0.005	22.48	0.012	100.408
	Apy	43.085	0.029	0.016	0.019	0.034	34.545	0.036	0	0	0.02	22.4	0.045	100.229
	Apy	42.46	0	0	0.129	0.086	34.394	0	0	0	0	22.099	0	99.168
	Apy	44.269	0	0	0	0.039	34.351	0.001	0	0	0.072	21.305	0.046	100.083
	Apy	44.269	0	0	0	0.039	34.351	0.001	0	0	0.072	21.305	0.046	100.083
	Apy	44.197	0	0.001	0	0.048	33.929	0	0.025	0	0	21.38	0	99.58
	Apy	40.299	0	0.06	0.051	0.042	33.936	0.001	0.017	0	0.005	21.195	0.021	95.627
	Apy	44.005	0	0.025	0.04	0.064	34.026	0	0.031	0	0	20.809	0.037	99.037
ZK7-1TZ3	I-py	0.075	0.036	0	0.012	0.054	46.366	0.024	0	0	0	53.35	0.055	99.972
	I-py	0.178	0	0	0	0.058	46.249	0.012	0.012	0	0.066	52.599	0	99.174
	II-py	2.805	0	0.005	0	0.045	45.825	0	0	0	0	52.271	0.014	100.965
	II-py	1.217	0	0.015	0.059	0.439	45.343	0.018	0.006	0	0.039	52.461	0	99.597
	II-py	2.099	0	0.026	0.022	0.034	45.677	0.026	0.002	0	0	51.588	0.041	99.515
	II-py	2.331	0	0	0	0.017	45	0.038	0.023	0	0	52.186	0	99.595
	II-py	2.97	0	0	0	0.091	45.284	0.021	0	0	0	51.495	0.092	99.953
	II-py	2.289	0.037	0	0	0.037	45.099	0.014	0.022	0	0.072	51.426	0.027	99.023
	III-py	1.844	0	0	0.396	0.188	44.829	0.027	0	0	0	51.634	0.01	98.928
	III-py	2.187	0.002	0.032	0.038	0.052	44.741	0.008	0.035	0	0.004	51.49	0	98.589
	II-py	3.836	0.059	0.027	0.024	0.081	44.973	0	0.019	0	0	50.352	0.003	99.374
	II-py	4.142	0	0.056	0.128	0.057	44.851	0	0	0	0.143	50.346	0	99.723
	II-py	1.738	0	0	0.109	0.092	43.853	0.017	0	0	0.022	50.521	0.064	96.416
	Apy	40.827	0.029	0.007	0	0.044	34.922	0.005	0.01	0	0	24.062	0	99.906
	Apy	41.213	0	0.009	0.015	0.085	34.878	0.021	0	0	0.031	23.81	0.053	100.115
	Apy	41.462	0	0	0.032	0.026	34.819	0.023	0.042	0	0.005	23.347	0.074	99.83
	Apy	41.151	0	0.029	0.182	0.038	34.52	0	0	0	0	23.181	0	99.101
	Apy	42.363	0.012	0.006	0	0.065	34.737	0	0.025	0	0	23.015	0.017	100.24
	Apy	41.994	0.037	0	0	0.048	34.393	0.02	0.003	0	0.071	22.788	0	99.354
	Apy	42.254	0.01	0.052	0.003	0.055	34.4	0.012	0	0	0	22.725	0.058	99.569
	Apy	42.012	0	0.018	0	0.017	34.526	0.054	0.048	0	0	22.506	0.042	99.223
	Apy	41.686	0.004	0	0	0.033	34.073	0.037	0	0	0	22.739	0	98.572
	Apy	43.393	0.017	0.018	0.042	0.042	34.4	0	0	0	0	22.301	0.091	100.304
	Apy	42.447	0	0.006	0	0.055	33.781	0.003	0.013	0	0.031	22.603	0.14	99.079
	Apy	43.158	0	0.01	0.053	0.024	33.841	0.039	0	0	0.005	21.977	0	99.107
	Apy	43.05	0	0	0.001	0.018	34.067	0	0	0	0.08	21.499	0.07	98.785
	Apy	44.064	0	0	1.328	0.105	32.694	0.004	0.013	0	0	21.542	0.038	99.788
	II-py	6.731	0	0.108	0.06	0.099	44.595	0	0.003	0	0.029	49.508	0.035	101.168
ZK7-1TZ4	I-py	0.019	0.044	0	0	0.022	46.858	0.003	0.001	0	0	53.404	0	100.351
	I-py	0.035	0	0	0	0.087	46.57	0	0.005	0.018	0	53.513	0	100.228
	I-py	0.032	0.034	0	0.088	0.025	46.471	0.012	0.014	0	0	53.252	0	99.928
	III-py	0	0	0.044	0.003	0.002	45.485	0	0.002	0	0.044	53.612	0.051	99.243
	Apy	43.192	0.027	0.001	0.025	0.031	33.552	0.02	0.014	0	0	21.252	0.074	98.188
	I-py	0	0.01	0.024	0.014	0.08	46.771	0.01	0.01	0	0.015	53.489	0.01	100.433
	I-py	0	0.032	0	0.056	0.093	45.381	0.012	0	0	0	54.206	0	99.78
	I-py	0.284	0.05	0	0.053	0.076	45.338	0.019	0	0	0.018	52.611	0.048	98.497
	I-py	0.542	0	0.057	0.115	0.182	45.446	0.003	0.035	0	0	52.781	0.01	99.171
	I-py	0.712	0	0.043	0.121	0.198	45.433	0.017	0	0	0.013	52.657	0.01	99.204
ZK7-2TZ01	III-py	0.096	0	0.035	0.065	0.011	45.759	0.004	0.003	0	0.074	53.309	0.127	99.483
	III-py	0.099	0	0.05	0.065	0.068	45.586	0.049	0.005	0	0.089	52.903	0	98.914
	III-py	0.216	0.068	0.041	0.056	0.109	45.42	0.082	0.016	0	0.177	52.06	0.033	98.278
	III-py	0.392	0	0.096	0.111	0.262	44.737	0	0	0	0.201	52.305	0	98.104
	III-py	0.254	0.053	0.074	0.098	0.132	44.656	0.021	0.024	0	0.093	51.978	0.003	97.386
	III-py	0.078	0	0	0.013	0.079	44.428	0.015	0.009	0.008	0	51.13	0	95.76
ZK7-2TZ1	II-py	0.699	0.015	0.038	0.231	0.089	45.035	0.007	0	0	0.013	53.807	0.027	99.961
	II-py	3.577	0.01	0.028	0.333	0.277	44.037	0.036	0.028	0	0.078	50.641	0.145	99.19
	Apy	42.003	0.086	0.013	0	0.03	34.207	0.091	0.019	0	0	22.521	0	98.97
	Apy	43.236	0.034	0.054	0	0.019	34.148	0.08	0	0	0.018	22.172	0	99.761
	Apy	44.022	0	0	0	0.01	33.962	0	0.002	0	0	21.851	0.16	100.007
	Apy	42.502	0.078	0.022	0	0.019	33.894	0	0.024	0	0.136	21.289	0.219	98.183
ZK7-2TZ3	III-py	0.138	0.078	0.029	0.081	0.17	46.323	0.026	0.042	0	0.118	53.032	0.093	100.13
	III-py	0.052	0.047	0.005	0.484	0.173	46.049	0	0	0	0	53.232	0.066	100.108
	III-py	0.137	0	0.077	0.124	0.2	45.586	0.044	0.014	0	0.146	53.093	0	99.421
	III-py	0.068	0	35.467	0.137	0.053	29.769	0	0.031	0	0	35.239	0.029	100.793
ZK7-2TZ4	III-py	0.846	0	0	0	0.077	45.429	0.022	0	0	0	52.774	0	99.148
	III-py	0.334	0.064	0.06	0.033	0.216	45.29	0.014	0	0	0	51.871	0.03	97.912
	III-py	0.139	0.037	0.052	0.072	0.186	44.657	0.043	0	0	0	52.297	0.007	97.49
	II-py	4.224	0.017	0.038	0.028	0.062	45.786	0.009	0	0	0	50.672	0.059	100.895
	II-py	4.603	0	0.038	0.166	0.046	45.47	0.029	0.012	0	0	50.103	0.042	100.509
	II-py	5.055	0.012	0.02	0.08	0.07	45.211	0	0.016	0	0	50.245	0.01	100.719
	Apy	40.241	0	0	0	0.08	34.829	0	0	0	0	24.283	0.099	99.532
	Apy	39.389	0	0.003	0	0.017	34.577	0.145	0	0	0.01	24.089	0.012	98.242
	Apy	41.54	0.016	0	0.018	0.021	34.842	0.025	0	0	0.005	23.595	0.025	100.087
	Apy	43.246	0	0.007	0.005	0.046	34.509	0.008	0.016	0	0.023	23.084	0.029	100.973
	Apy	42.95	0.01	0	0	0.037	34.584	0.03	0.007	0	0	22.381	0.013	100.012
	Apy	44.053	0	0.022	0.087	0.028	34.007	0.006	0	0	0.018	21.841	0.08	100.142
	Apy	40.809	0	0.047	0	0.02	33.195	0.069	0	0	0.033	22.249	0.05	96.472
	Apy	40.594	0.004	0	0.005	0.069	32.841	0.005	0.002	0	0.044	21.676	0.099	95.339
	I-py	0.087	0.003	0	0.084	0.069	46.498	0	0	0	0.028	53.26	0.024	100.053
	I-py	0.087	0.014	0	0.018	0.08	46.379	0.002	0.022	0	0.02	53.269	0	99.891
ZK7-2TZ4	II-py	1.816	0	0.017	0	0.019	46.91	0.022	0.001	0	0	52.041	0	100.826
	II-py	4.441	0.005	0.018	0.054	0.045	45.129	0.052	0	0	0	51.863	0.073	101.68
	II-py	5.265	0	0.025	0.082	0.054	44.116	0.046	0.002	0	0	48.946	0.651	99.187
	II-py	7.653	0.025	0.02	0.041	0.029	44.91	0.008	0	0	0	47.849	0.078	100.613
	I-py	0	0.034	35.37	0	0.016	30.507	0.004	0.011	0	0	34.809	0	100.751
	I-py	0	0.122	35.132	0	0.037	30.009	0.111	0.034	0	0.05	34.712	0.03	100.237
	Apy	41.991	0.022	0	0	0.024	34.643	0.038	0.008	0	0	23.15	0.096	99.972
	Apy	42.883	0	0.024	0.115	0.016	34.524	0	0.002	0	0	22.324	0.13	100.018
	Apy	43.487	0.056	0.004	0.088	0.04	34.272	0.014	0.023	0	0.031	22.091	0.114	100.22
	Apy	48.284	0.02	0	0.008	0.067	33.757	0.019	0	0	0.069	20.271	0	102.495
ZK7-2TZ5	I-py	0	0.008	0	0.053	0.049	46.789	0.011	0	0	0	53.767	0	100.677
	I-py	0.104	0.05	0	0.006	0.096	45.864	0.016	0.039	0	0	54.041	0.003	100.219
	I-py	0	0.017	0.003	0.024	0.065	46.367	0.01	0.033	0	0.045	53.375	0	99.939
	I-py	0.11	0	0.031	0.062	0.138	46.232	0.01	0	0	0	53.16	0	99.743
	I-py	0.086	0.01	0.071	0.293	0.108	45.409	0.076	0.007	0	0.047	52.865	0	98.972
	I-py	0.036	0	0.043	0.077	0.072	45.174	0.04	0	0	0	52.565	0	98.007
	I-py	0.106	0.045	0.007	0.515	0.137	44.688	0.026	0	0	0.037	52.62	0	98.181
	I-py	0.122	0.038	0.021	0.192	0.117	44.356	0.055	0	0	0.006	51.775	0	96.682
	I-py	0.07	0.033	0	0.269	0.129	43.787	0.04	0.018	0	0	50.751	0	95.097
	I-py	0.142	0.018	0	0.189	0.138	42.336	0.009	0	0	0.045	49.969	0	92.846
注：由中国地质调查局西安地质调查中心实验室测试。I-py为I阶段黄铁矿；II-py为II阶段黄铁矿；III-py为III阶段黄铁矿；Apy为II阶段毒砂。

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