Characteristics of Structural Superimposed Halos and Deep Prospecting Prediction in Erdaogou Gold Deposit, Liaoning Province

doi:10.19657/j.geoscience.1000-8527.2020.06.17

Abstract

Abstract:

Erdaogou gold deposit in Liaoning Province is a magmatic-hydrothermal deposit hosted in continental volcanic rocks, orebodies are strictly controlled by structures. In order to study the characteristics of structural superimposed halos and predict the extension of No.1 and No.3 orebodies, this paper systematically studied the characteristic indicator elements, structural superimposed halos axial zoning sequences, anomaly threshold and geochemical parameters of the samples at the 450 m to -305 m depth. The results show that the indicator elements are Sb and Hg for front-ore halos, Au, Ag, Cu and Pb for near-ore halos, Co and Ni for late-ore halos, respectively. From top to bottom, the axial zoning of superimposed halos are Co→Sb→Cu→Au→Hg→Ni→Pb→Ag for No.1 orebody, Ag and Cu→Hg→Au→Pb→Sb→Co and Ni for No.3 orebody. These geochemical parameters indicate that the No.1 orebody was respectively superimposed at 370 m, 130 m, -215 m depth and the No.3 orebody was superimposed at -125 m, -215 m depth,based on this, we established the ideal models of structural superimposed halos. The anomaly characteristic map of structural superimposed halos shows that the anomaly intensity of front-ore halos and near-ore halos are large, while late-ore halos are small of No.1 orebody at -215 m depth. The anomaly intensity of front-ore halo, near-ore halo and late-ore halo of No.3 orebody are larger at -215 m depth. To sum up, we deduce that the No.1 orebody still has a great extension below -215 m depth, while the No.3 orebody has a certain extension deep down.

Key words: structural superimposed halo, characteristic indicator element, axial zoning sequence, geochemical parameter

CLC Number:

P618.51
P632

WEN Jiawei, SHI Pengliang, LIU Yanbing, ZHANG Jing, QU Hailang, LI Yuanshen, HU Boxin, MIAO Guang. Characteristics of Structural Superimposed Halos and Deep Prospecting Prediction in Erdaogou Gold Deposit, Liaoning Province[J]. Geoscience, 2020, 34(06): 1291-1302.

Figures/Tables 14

References 27

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元素	Au	Ag	As	Hg	Co	Ni	Cu	Zn	Mo	Sb	Ba	W	Pb	Bi
Au	1
Ag	0.715	1
As	0.255	0.325	1
Hg	0.338	0.318	0.166	1
Co	0.458	0.528	0.298	0.324	1
Ni	0.293	0.404	0.334	0.192	0.697	1
Cu	0.489	0.578	0.193	0.648	0.433	0.271	1
Zn	0.228	0.361	0.160	0.057	0.056	0.044	0.306	1
Mo	0.213	0.226	0.110	0.051	0.279	0.102	0.064	0.024	1
Sb	0.308	0.318	0.282	0.829	0.312	0.204	0.626	0.015	0.065	1
Ba	-0.532	-0.613	-0.295	-0.207	-0.496	-0.476	-0.343	-0.234	-0.219	-0.200	1
W	0.304	0.193	0.079	-0.027	0.256	0.364	-0.017	-0.042	0.076	-0.018	-0.338	1
Pb	0.430	0.523	0.184	0.108	0.135	0.095	0.467	0.662	0.047	0.073	-0.300	-0.002	1
Bi	0.320	0.304	0.076	0.222	0.212	0.082	0.451	0.152	0.047	0.145	-0.177	0.024	0.426	1

元素	Au	Ag	As	Hg	Co	Ni	Cu	Zn	Mo	Sb	Ba	W	Pb	Bi
Au	1
Ag	0.715	1
As	0.255	0.325	1
Hg	0.338	0.318	0.166	1
Co	0.458	0.528	0.298	0.324	1
Ni	0.293	0.404	0.334	0.192	0.697	1
Cu	0.489	0.578	0.193	0.648	0.433	0.271	1
Zn	0.228	0.361	0.160	0.057	0.056	0.044	0.306	1
Mo	0.213	0.226	0.110	0.051	0.279	0.102	0.064	0.024	1
Sb	0.308	0.318	0.282	0.829	0.312	0.204	0.626	0.015	0.065	1
Ba	-0.532	-0.613	-0.295	-0.207	-0.496	-0.476	-0.343	-0.234	-0.219	-0.200	1
W	0.304	0.193	0.079	-0.027	0.256	0.364	-0.017	-0.042	0.076	-0.018	-0.338	1
Pb	0.430	0.523	0.184	0.108	0.135	0.095	0.467	0.662	0.047	0.073	-0.300	-0.002	1
Bi	0.320	0.304	0.076	0.222	0.212	0.082	0.451	0.152	0.047	0.145	-0.177	0.024	0.426	1

元素	因子								提取
元素	F1	F2	F3	F4	F5	F6	F7	F8	提取
Au	0.232	0.823	0.062	0.122	0.192	0.110	0.176	0.068	0.833
Ag	0.210	0.780	0.266	0.290	0.125	0.081	-0.018	0.104	0.840
As	0.124	0.157	0.178	0.091	0.014	0.038	0.011	0.954	0.992
Hg	0.913	0.123	0.095	0.005	0.066	0.014	-0.006	0.010	0.896
Co	0.217	0.327	0.084	-0.025	0.122	0.189	0.027	0.058	0.856
Ni	0.088	0.161	0.891	0.027	-0.007	-0.031	0.199	0.158	0.894
Cu	0.678	0.326	0.218	0.305	0.330	-0.026	-0.105	-0.037	0.829
Zn	0.031	0.106	0.018	0.947	-0.036	0.016	-0.015	0.052	0.913
Mo	0.014	0.143	0.089	0.004	0.009	0.981	0.017	0.035	0.992
Sb	0.929	0.133	0.081	-0.035	-0.007	0.025	-0.003	0.165	0.911
Ba	-0.059	-0.700	-0.379	-0.138	0.045	-0.068	-0.169	-0.109	0.703
W	-0.054	0.194	0.192	-0.043	0.004	0.018	0.951	0.009	0.984
Pb	0.039	0.334	-0.010	0.799	0.345	-0.017	-0.034	0.065	0.845
Bi	0.127	0.136	0.057	0.130	0.948	0.013	0.010	0.012	0.954
特征值	4.841	1.835	1.746	0.983	0.969	0.791	0.703	0.575
百分比/%	34.576	13.108	12.468	7.019	6.921	5.649	5.021	4.110
累计百分比/%	34.576	47.685	60.153	60.172	74.093	79.742	84.764	88.873

元素	因子								提取
元素	F1	F2	F3	F4	F5	F6	F7	F8	提取
Au	0.232	0.823	0.062	0.122	0.192	0.110	0.176	0.068	0.833
Ag	0.210	0.780	0.266	0.290	0.125	0.081	-0.018	0.104	0.840
As	0.124	0.157	0.178	0.091	0.014	0.038	0.011	0.954	0.992
Hg	0.913	0.123	0.095	0.005	0.066	0.014	-0.006	0.010	0.896
Co	0.217	0.327	0.084	-0.025	0.122	0.189	0.027	0.058	0.856
Ni	0.088	0.161	0.891	0.027	-0.007	-0.031	0.199	0.158	0.894
Cu	0.678	0.326	0.218	0.305	0.330	-0.026	-0.105	-0.037	0.829
Zn	0.031	0.106	0.018	0.947	-0.036	0.016	-0.015	0.052	0.913
Mo	0.014	0.143	0.089	0.004	0.009	0.981	0.017	0.035	0.992
Sb	0.929	0.133	0.081	-0.035	-0.007	0.025	-0.003	0.165	0.911
Ba	-0.059	-0.700	-0.379	-0.138	0.045	-0.068	-0.169	-0.109	0.703
W	-0.054	0.194	0.192	-0.043	0.004	0.018	0.951	0.009	0.984
Pb	0.039	0.334	-0.010	0.799	0.345	-0.017	-0.034	0.065	0.845
Bi	0.127	0.136	0.057	0.130	0.948	0.013	0.010	0.012	0.954
特征值	4.841	1.835	1.746	0.983	0.969	0.791	0.703	0.575
百分比/%	34.576	13.108	12.468	7.019	6.921	5.649	5.021	4.110
累计百分比/%	34.576	47.685	60.153	60.172	74.093	79.742	84.764	88.873

因子	因子组成
F1	Sb-(Au-Ag-Co-Cu-Hg)
F2	Au-(Ag-Co-Cu-Ba-Pb)
F3	Ni-(Ag-Cu-Ba)