Comprehensive Electromagnetic Experimental Dataset in Deep Mineralization Mechanism in Wuxi Polymetallic Ore Deposit of Anhui Province, China

LIN Fangli1WANG Guangjie2Yang Xiaoyong3

1 College of Electronic and Electrical Engineering，Henan Normal University，Xinxiang 453007，China2 Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China3 School of Earth and Space Sciences，University of Science and Technology of China，Hefei 230036，China

DOI:10.3974/geodb.2018.03.08.V1

Published:May 2018

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Key Words：

Wuxi Polymetallic Ore,CSAMT,dual-frequency induced polarization method,ground high-precision magnetic method,Chinese Journal of Geophysics

Abstract：

The Wuxi polymetallic ore deposit, which lies between the middle and lower reaches of the Yangtze River polymetallic metallogenic belt and South China metallogenic belt, is a new prospecting area in the Jiangnan orogen. The fieldwork was made in March - November 2011 and October - November 2012 respectively, and then physical properties of the rock were measured in the laboratory. Three kinds of electromagnetic methods are used in the integrated exploration stage — ground high-precision magnetic method, dual-frequency induced polarization method, and controlled source audio magnetotelluric method (CSAMT). The direction of northwest 45° perpendicular to the main fault was selected as the line direction, and a 200 x 25 m survey network was laid out to obtain spatial distribution data on susceptibility, polarizability, and resistivity. The original magnetic field was collected by the PM-2 proton magnetometer and the final magnetic anomaly was obtained through daily correction, height correction and magnetic field smoothing. The induced polarization data was acquired by the dual-frequency IP instrument, and the frequency amplitude was calculated based on the electric fields at 2hz and 2//13hz. The controlled source audio magneto telluric data was obtained by using the V6A system of Phoenix to acquire electric and magnetic field data of different frequencies. The deep apparent resistivity data was calculated by one-dimensional least squares inversion calculation. The forward calculation was performed on the inversion data, the calculated electromagnetic field data was compared with the collected raw data to verify the accuracy of the inversion result. Based on the results of the geophysical studies, combined with geological and geochemical data, the mineralization dynamics model of the study area is built and then the mineralization mechanism is analyzed. The dataset includes: Part I: raw data collected in situ survey and analysis in the laboratory, which includes: (1) The physical property data of the main rock types exposed in Wuxi polymetallic ore deposit; (2) GPS data of lines and points in situ survey; (3) Raw data and corrected data got in ground precise magnetic survey； (4) Plane amplitude frequency and apparent resistivity data using dual frequency induced polarization method; and (5) CSAMT fieldwork log and raw data collected everyday in Jingxian, Wuxi, China. Part 2: Split data including: (1) Split results of corrected data using the ground high-precision magnetic survey; (2) Split results of amplitude frequency using the dual frequency induced polarization method; (3) Split results of the deep survey line apparent resistivity using CSAMT method. Different methods of collecting data obtained through the split process can reach 25m x 25m x 25m spatial resolution. The dataset was archived in the format of .xlsx, .grd, .cmd, .cms, .cmv, .csv, .cmr, .csr, .pdf and the data size is 31.4 MB (compressed into one file, 6.86 MB). The analysis paper based on this dataset was published at the Chinese Journal of Geophysics, Vol. 59, No. 11, 2016.

Foundation Item：

Ministry of Science and Technology of P. R. China (2016YFC0600507); Henan Normal University (5101239170002); Joint Fund (U704134)

Data Citation：

LIN Fangli, WANG Guangjie, Yang Xiaoyong.Comprehensive Electromagnetic Experimental Dataset in Deep Mineralization Mechanism in Wuxi Polymetallic Ore Deposit of Anhui Province, China[J/DB/OL]. Digital Journal of Global Change Data Repository, 2018. https://doi.org/10.3974/geodb.2018.03.08.V1.

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