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The effect of applying geophysical and geochemical anomalies to the Shiwuliqiao gold deposit in Heilongjiang Province |
ZHANG Fu-Cheng1, YANG Yan-Chen1, LI Xiang-Wen2, JIANG Bing-Zhong2 |
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. No. 3 Gold Geological Party of Chinese People's Armed Police Force, Harbin 150086, China |
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Abstract Located on the southern margin of upper Heilongjiang foreland basin, the Shiwuliqiao gold deposit was discovered in recent years though checking the small-scale geochemical anomaly by integrated geophysical and geochemical methods . The soil geochemical survey suggests that Au, which is characterized by high content, higher coefficient of variations and obvious local concentration, is the main ore-forming element. Besides, Au element anomaly is a direct indicator for prospecting, whereas element anomalies of As, Sb, Cu, Bi can be used as indirect indicators in prospecting. An analysis of the electromagnetic field and anomalies show that many sets of NNE-striking concealed faults are characterized by high magnetism, low resistivity, and medium-low polarization, caused probably by filling of dikes. The NE—NEE ore-controlling structures exhibit high resistivity and high polarization, and their intersections with NNE trending faults display better gold mineralization. The discovery of the Shiwuliqiao gold deposit suggests that geophysical and geochemical methods are effective means in search for gold and polymetallic deposits in northern areas of marsh landscape in the Da Hinggan Mountains.
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Received: 18 March 2014
Published: 10 April 2015
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