Prospecting Prediction Using Geoelectric Extraction in the Periphery of the No.374 Deposit in Rongshui, Guangxi

doi:10.19657/j.geoscience.1000-8527.2023.026

Abstract

Abstract:

To ascertain the uranium mineral ore-fields for the purpose of future exploration in the periphery of Guangxi Rongshui No.374 deposit, and further to delineate the target area for future prospecting, we carried out a prospecting study using geoelectric extraction and measurement techniques.At first, a feasibility test of ore prospecting was performed on a known ore profile, and the testing results show that clear anomalies of major ore-forming elements can be detected directly above the known orebodies, showing distinct ore-indicating effect.This test proved that this method is feasible and effective for local ore prospecting.Through the factor and cluster analysis of 13 elements extracted from geoelectricity, four element groups of F1(Pb-Zn-Ce-Eu-La-Nd-Yb), F2(U-Th-As), F3(Sb-W) and F4 (Mo) were obtained, with F2 being the main factor in this study area, and F1 being the secondary factor.The abnormal distributions of those element groups were analyzed through drawing the abnormal scores of F1 and F2 factors, and we found that the abnormal distribution w(U)/w(Th) >1/3 is an important index for uranium prospecting.According to the characteristics of single element, F1 and F2 factor, and w(U)/w(Th) anomaly, and with combination of local geology, we delineated two target areas (I and II), of which target area II has a greater exploration potential for hidden uranium orebodies.

Key words: No.374 deposit, geoelectric extraction, anomaly feature, prospecting prediction, Rongshui

CLC Number:

P631.3

ZHANG Jian, WEN Meilan, YE Wu, JIANG Xiaoming, TAN Jiangdong, YANG Hang, LUO Haiyi, LIU Panfeng, JIANG Yuxiong. Prospecting Prediction Using Geoelectric Extraction in the Periphery of the No.374 Deposit in Rongshui, Guangxi[J]. Geoscience, 2024, 38(01): 214-223.

Figures/Tables 10

References 29

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元素	As	Ce	Eu	La	Mo	Nd	Pb	Sb	Th	U	W	Yb	Zn
As	1.000
Ce	0.359	1.000
Eu	0.395	0.949	1.000
La	0.424	0.836	0.937	1.000
Mo	0.406	0.116	0.119	0.154	1.000
Nd	0.403	0.911	0.975	0.975	0.116	1.000
Pb	0.396	0.819	0.891	0.877	0.078	0.891	1.000
Sb	0.364	0.200	0.225	0.263	0.156	0.244	0.211	1.000
Th	0.631	0.513	0.498	0.468	0.294	0.481	0.407	0.157	1.000
U	0.667	0.705	0.736	0.717	0.158	0.728	0.724	0.316	0.653	1.000
W	0.369	0.270	0.273	0.274	0.150	0.277	0.239	0.209	0.261	0.312	1.000
Yb	0.415	0.894	0.951	0.894	0.082	0.941	0.867	0.198	0.475	0.682	0.253	1.000
Zn	0.149	0.756	0.691	0.617	0.070	0.658	0.500	0.184	0.177	0.410	0.205	0.625	1.000

元素	As	Ce	Eu	La	Mo	Nd	Pb	Sb	Th	U	W	Yb	Zn
As	1.000
Ce	0.359	1.000
Eu	0.395	0.949	1.000
La	0.424	0.836	0.937	1.000
Mo	0.406	0.116	0.119	0.154	1.000
Nd	0.403	0.911	0.975	0.975	0.116	1.000
Pb	0.396	0.819	0.891	0.877	0.078	0.891	1.000
Sb	0.364	0.200	0.225	0.263	0.156	0.244	0.211	1.000
Th	0.631	0.513	0.498	0.468	0.294	0.481	0.407	0.157	1.000
U	0.667	0.705	0.736	0.717	0.158	0.728	0.724	0.316	0.653	1.000
W	0.369	0.270	0.273	0.274	0.150	0.277	0.239	0.209	0.261	0.312	1.000
Yb	0.415	0.894	0.951	0.894	0.082	0.941	0.867	0.198	0.475	0.682	0.253	1.000
Zn	0.149	0.756	0.691	0.617	0.070	0.658	0.500	0.184	0.177	0.410	0.205	0.625	1.000

元素	F1	F2	F3	F4
As	0.181	0.766	0.337	0.279
Ce	0.922	0.227	0.086	0.039
Eu	0.949	0.262	0.092	0.022
La	0.898	0.274	0.130	0.052
Mo	0.021	0.238	0.074	0.922
Nd	0.938	0.264	0.111	0.015
Pb	0.854	0.303	0.076	-0.052
Sb	0.147	0.006	0.830	0.211
Th	0.296	0.821	-0.005	0.155
U	0.597	0.639	0.206	0.005
W	0.115	0.365	0.627	-0.168
Yb	0.910	0.278	0.068	-0.015
Zn	0.791	-0.190	0.193	0.124
特征值	6.134	2.329	1.337	1.048
方差贡献率(%)	47.187	17.913	10.284	8.062
累计方差贡献率(%)	47.187	65.100	75.383	83.445

元素	F1	F2	F3	F4
As	0.181	0.766	0.337	0.279
Ce	0.922	0.227	0.086	0.039
Eu	0.949	0.262	0.092	0.022
La	0.898	0.274	0.130	0.052
Mo	0.021	0.238	0.074	0.922
Nd	0.938	0.264	0.111	0.015
Pb	0.854	0.303	0.076	-0.052
Sb	0.147	0.006	0.830	0.211
Th	0.296	0.821	-0.005	0.155
U	0.597	0.639	0.206	0.005
W	0.115	0.365	0.627	-0.168
Yb	0.910	0.278	0.068	-0.015
Zn	0.791	-0.190	0.193	0.124
特征值	6.134	2.329	1.337	1.048
方差贡献率(%)	47.187	17.913	10.284	8.062
累计方差贡献率(%)	47.187	65.100	75.383	83.445

元素	背景值	标准差	异常外带	异常中带	异常内带
U	0.123	0.061	0.184	0.245	0.367
Th	0.332	0.174	0.506	0.680	1.028
As	0.520	0.145	0.665	0.810	1.100