1. The First Institute of Geological and Mineral Resources Survey, Henan Bureau of Geology and Mineral Exploration and Development, Luoyang 471023, China 2. Key Laboratory of Gold and Silver Polymetallic Ore-forming Series and Deep Prediction of Henan Province, Luoyang 471023, China
According to the physical character difference between the exploration object geological body (silver polymetal-bearing structural alteration zone and granite porphyry mass) and the wall rock, the authors employed such integrated geophysical exploration methods as high-precision magnetic survey, IP intermediate gradient and IP sounding to prospecting for concealed silver polymetallic deposits in the shallow cover area of eastern Xiaoshan. High-precision magnetic survey was used to divide favorable prospecting targets, IP intermediate gradient method was utilized to delineate favorable ore-forming sectors of mineralization and alteration, and IP sounding was used to optimize drill hole layout. In this way, the ore-intersecting rate was increased, and important breakthrough was made in ore prospecting.
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