内蒙古洛恪顿铅锌多金属矿区1:5万地电化学测量试验

doi:10.11720/wtyht.2020.1475

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Abstract

With the electro-geochemical survey technology becoming more and more "portable", it is possible to conduct electro-geochemical survey of small or medium scales. In this paper, an effect comparison test of electro-geochemicalsurvey and soil survey at the scale of 1:50,000 was carried out within 40 km² of the hydrothermal type lead-zinc polymetallic ore district in the aeolian sand shallow covered area of Luokedun, Inner Mongolia. The results are as follows: ①Electro-geochemical survey can delineate comprehensive anomalies of Pb-Zn-Ag-As-Bi-Cd, which have the same composition as the known orebodies. The locations of the anomalies are consistent with the known orebodies/ore spots in spatial distribution. ② Compared with the soil survey results, the results of anomaly range, contrast and continuity from the electro-geochemical survey are more superior in that soil soil survey can only find anomalies of spotted distribution in the outcropping area of the hill residual soil. ③The electro-geochemical survey also finds comprehensive anomalies of multiple elements in the aeolian sand shallow covered area in the northwest of the survey area. Based on these anomalies, the 1:10,000 induced-current middle-gradient survey and drilling verification test was carried out. A 6-meter-thick Ag-Cu rich orebody was discovered at the depth of about 540 meter, which seems to have been a breakthrough in ore prospecting. The above test results show that the electro-geochemical survey at the scale of 1:50,000 can effectively delineate the prospecting targets in the shallow covered area of aeolian sand. The electro-geochemical survey can be popularized and applied in future work.

Key words： electro-geochemistry 1:50 000 covered by aeolian sand Luokedun lead-zinc polymetallic deposit Inner Mongolia

Received: 09 October 2019 Published: 24 June 2020

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Corresponding Authors: Bin-Bin SUN,Mei-Lan WEN E-mail: sunbinbin@igge.cn;meilanwen112@126.com

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	Shuai LI
	Bin-Bin SUN
	Mei-Lan WEN
	Chao WU
	Ling HE
	Dao-Ming ZENG
	Xiao-Meng CHENG
	Yin-Wei WEN

Cite this article:

Shuai LI,Bin-Bin SUN,Mei-Lan WEN, et al. 1:50 000 electro-geochemical survey in the Luokedun lead-zinc polymetallic deposit, Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2020, 44(3): 514-522.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1475 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I3/514

Generalized geologic map of the lead-zinc polymetallic ore in Loukedun exploration area,Dong Ujimqin Banner, Inner Mongolia Autonomous Region

Determination methods for samples of electro-geochemistry and soil survey

Statistical table for C_v of element content of electro-geochemistry and soil survey(n=542)

Statistical table for terrain and electron parameters of soil in the test area(n=542)

Contour of elevation and pH in the test area

Contour of current and conductivity in the test area

Anomaly threshold classification of contents for elements of electro-geochemistry survey in the test area

Anomaly threshold classification of contents for elements of soil survey in the test area

Geochemical distribution of cumulative frequency of soil elements in the test area

Geochemical anomaly distribution of Pb、Zn、Ag、As of electro-geochemistry and soil survey

Geochemical anomaly distribution of Bi、Cd、Fe、Al of electro-geochemistry and soil survey

Induced electric medium ladder scanning surface in the test area

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