激发极化法在覆盖区矿产勘查中的应用——以内蒙古昌图锡力锰银铅锌多金属矿勘查为例

doi:10.11720/wtyht.2019.1432

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Abstract

The Changtuxili Mn-Ag-Pb-Zn polymetallic ore deposit in Inner Mongolia was first discovered by 1∶50 000 soil geochemical survey; nevertheless, the area is covered with thick overburden and the recognition of surface outcrop is difficult. In order to further determine the favorable position for prospecting, the authors, based on the 1∶50 000 soil survey results, delineated seven IP anomalies by 1∶10 000 IP mid-elevator survey and bathymetry, and analyzed the scale and spatial location of buried polarizable body in sounding profile, thus effectively reducing the range of prospecting target area. Some sounding profiles were drilled to verify the discovery of multi-layered orebodies, which confirms the effectiveness of induced polarization method in prospecting in the study area. In addition, Jd6 is the largest IP anomaly found in the area, which can serve as a key target area for further prospecting. Based on summarizing the exploration work, the result provides a reference for prospecting in this kind of covered areas.

Key words： coverage areas Changtuxili Mn-Ag-Pb-Zn polymetallic ore deposit induced polarization method induced polarization anomaly

Received: 22 November 2018 Published: 15 August 2019

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	Articles by authors
	Yi-Xing MA
	Ting-Jie YAN
	Peng HE
	Zu-Jian LIU
	Hang SU
	Shuo GUO

Cite this article:

Yi-Xing MA,Ting-Jie YAN,Peng HE, et al. Exploration in coverage area: A case study of the Changtuxili Mn-Ag-Pb-Zn polymetallic ore deposit,Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2019, 43(4): 709-717.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1432 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I4/709

Geological map of the Changtuxili area in Inner Mongolia
1—Holocene Alluvium;2—Holocene Diluvium;3—Holocene Lacustine Deposit;4—Baogedawula Formation of Upper Miocene;5—Baiyingaolao Formation of Lower Cretaceous;6—Manitu Formation of Upper Jurassic;7—rhyolite vein;8—andesitic porphyrite vein;9—geological boundary;10—fault;11—volcanic vent;12—volcanic fault;13—mineralized zone and number;14—IP measuring range;15—drill hole and number

Map of the Changtuxili area in Inner Mongolia
1—anomaly outer zone; 2—anomaly median zone; 3—anomaly inner zone; 4—IP measuring range

Statistical results of rocks (ores) physical parameters

Apparent polarizability contour map

Apparent resistivity contour map

Position map of IP sounding section
1—IP anomaly target area and number; 2—electrical sounding of IP points and number; 3—drilling hole and number

Inversion result of polarizability (left) and resistivity (right) for lines

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