黄土覆盖区隐伏矿地球化学勘查技术试验研究——以河南中河堤银铅锌多金属矿为例

doi:10.11720/wtyht.2021.1324

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Abstract

As it is difficult to collect the weathering stream sediments of bedrock in the loess overburden area,the effect of regional geochemical exploration is often not ideal; therefore, regional geochemical exploration work has not been carried out in many loess overburden areasof China. In this paper, the deep-penetrating geochemistry method was used to carry out the experimental study of geochemical prospecting techniques for concealed deposits in the loess overburden area in the Zhonghedi silver-lead-zinc polymetallic deposit in Xiaoshan, Henan Province. The results of fine-grained soil prospecting method and metal mobile extraction measurement show that both methods can well indicate the anomalies of underlying polymetallic orebodies in the loess overburden area and, at the same time, the mobile extraction method further enhances the abnormal indication of ore-forming elements to the orebody, so both methods can be used as effective means in search for concealed polymetallic deposits in the loess overburden area.

Key words： loess overburden area concealed polymetallic deposit deep-penetrating geochemistry fine-grained soil prospecting method metal active state extraction measurement

Received: 23 June 2020 Published: 20 August 2021

ZTFLH:

P632

Corresponding Authors: ZHANG Bi-Min E-mail: 2001180114@cugb.edu.cn;zhangbimin@igge.cn

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	Bei DOU
	Bi-Min ZHANG
	Rong YE
	Qing-Hua CHI

Cite this article:

Bei DOU,Bi-Min ZHANG,Rong YE, et al. An experimental study of geochemical exploration methods for concealed deposits in loess overburden area: A case study of the Zhonghedi polymetallic deposit in Henan Province[J]. Geophysical and Geochemical Exploration, 2021, 45(4): 933-941.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1324 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I4/933

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Sketch geological map of Xiaoshan area(modified according to reference[24])

Sampling sites in Zhonghedi test area

Soil sample analytical method

指标	记录数	最小值	中位数	最大值	平均值	标准差	剔除异常点后			异常强度	异常衬度
指标	记录数	最小值	中位数	最大值	平均值	标准差	平均值	标准差	异常下限	异常强度	异常衬度
Au	165	1.08	2.61	9.45	2.83	1.00	2.75	0.75	4.25	5.02	1.83
Ag	165	44.6	82.5	3792	120	302	98.0	96.0	290	720	7.34
Pb	165	22.4	28.4	617	33.9	47.8	29.4	7.28	43.9	73.6	2.51
Zn	165	63.0	78.9	1955	101	156	85.4	28.6	143	222	2.61
As	165	6.45	13.8	37.0	14.0	2.81	13.7	1.70	17.1
Sb	165	0.92	1.22	219	2.65	16.9	1.33	0.49	2.30	3.80	2.86
Cu	165	21.5	27.2	83.6	27.8	5.06	27.5	2.59	32.6	35.8	1.30
Rb	165	74.8	110	129	108	8.49	108	8.49	125	129	1.19
P	165	227	626	1711	659	212	637	164	966	1054	1.65
S	165	76.5	156	369	164	51.5	160	42.3	244	264	1.65
Ba	165	450	554	957	567	69.9	556	35.4	626	690	1.24
Ti	165	4092	4427	5591	4446	186	4425	124	4672	4842	1.09
V	165	75.9	87.0	136	88.6	8.60	87.5	5.73	98.9	105	1.20
Cr	165	66.2	75.3	200	77.2	12.0	76.2	6.51	89.2	102	1.34
Mn	165	385	656	2867	714	302	679	152	983	1326	1.92
Sr	165	85.6	121	202	123	16.4	122	13.5	149	158	1.30
Zr	165	142	303	411	301	38.4	301	38.4	378	396	1.32
Nb	165	9.00	15.6	17.1	15.3	1.38	15.3	1.38	18.1
Li	165	23.0	37.4	67.9	37.5	4.05	37.3	3.29	43.9	46.1	1.24
Be	165	1.82	2.40	2.78	2.37	0.17	2.37	0.17	2.71	2.76	1.16
Co	165	11.2	14.3	33.8	14.8	2.84	14.4	1.52	17.4	20.4	1.42
Ni	165	27.4	33.5	44.5	35.7	2.90	35.6	2.83	41.3	42.4	1.19
Mo	165	0.39	0.71	1.43	0.72	0.11	0.72	0.10	0.92	0.97	1.35
Cd	165	88.0	208	6126	283	512	231	106	443	630	2.73
W	165	1.28	1.96	4.89	1.97	0.27	2.27	0.14	2.55
Th	165	3.85	13.3	16.0	12.9	1.84	12.9	1.84	16.6
U	165	1.23	2.42	3.34	2.40	0.31	2.40	0.30	3.00	3.03	1.26
B	165	28.7	60.8	85.2	59.6	9.45	59.6	9.45	78.5	81.6	1.37
Sn	165	2.08	3.29	5.58	3.28	0.45	3.24	0.36	3.96	4.22	1.30
Bi	165	0.24	0.40	0.60	0.40	0.050	0.40	0.050	0.50	0.53	1.33
Hg	165	4.66	28.5	607	35.8	48.4	31.2	12.2	55.5	74.3	2.38
Si $O 2 *$	165	45.9	61.2	65.3	60.2	3.33	60.2	3.33	66.9
Al₂ $O 3 *$	165	11.8	14.0	17.6	14.0	0.48	14.0	0.70	15.4	15.6	1.11
TFe₂ $O 3 *$	165	4.21	5.12	9.11	5.26	0.71	5.14	0.38	5.90	6.29	1.22
MgO^*	165	1.33	1.69	3.11	1.71	0.22	1.68	0.13	1.94	2.17	1.29
CaO^*	165	0.84	1.34	10.4	1.99	1.82	1.70	1.05	3.80	5.37	3.16
Na₂O^*	165	0.38	1.02	1.36	0.98	0.19	0.98	0.19	1.36	1.36	1.00
K₂O^*	165	1.87	2.42	3.37	2.42	0.19	2.41	0.17	2.75	2.76	1.15

Statistics element content of fine grain soils in Zhonghedi

Statistics element content of metal mobile extraction in Zhonghedi

Geochemical maps of Ag、As、Cu、Pb、Sb and Zn in fine grain soils

Geochemical maps of Ag、As、Cu、Pb、Sb and Zn in metal mobile extraction

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