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| GEOCHEMICAL EXPLORATION INDICATORS FOR THE WUNUGETUSHAN PORPHYRY Cu (Mo) DEPOSIT |
| LIANG Sheng-yue1, MA Sheng-ming2, ZHU Li-xin3, LIU Chong-min2, XU Ming-zuan1 |
1. Geological Survey Technology Institute of Jiangsu Province, Nanjing 210007, China;
2. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China;
3. Chinese Academy of Geological Sciences, Beijing 100037, China |
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Abstract The Wunugetushan porphyry Cu (Mo) deposit is a typical porphyry Cu (Mo) deposit in the Ergun metallogenic belt. Based on the depletion and enrichment regularity of 47 elements and the alteration zone or mineralization characteristics, this paper has summarized geochemical indicators of this ore deposit. The metallogenic environment indicators such as [KK(SiO2)+KK(K2O)]/KK(Al2O3)+KK(Na2O)+KK(CaO)+KK(Fe2O3)+KK(MgO)]、KK(K2O)/KK(Na2O),KK(K2O)/KK(Rb), CaO, MgO and Na2O can reflect the ore-forming environment and the alteration extent and delineate the alteration area. Cu, Mo, Ge, W, Sn, F, Bi, S, Se and Hf serve as the near-ore indicators, which can reflect the mineralization degree and even indicate the location of the ore body in this ore deposit; [KK(Pb)·KK(Zn)×1000]/[KK(Cu)·KK(Mo)],[KK(As)·KK(Sb)·KK(Bi)]/[KK(Cu)·KK(Mo)],[KK(Au)·KK(Ag)]/[KK(Cu)·KK(Mo),As, Au, Ag and Te serve as the ore periphery indicators, which can enlarge the target of geochemical exploration. These geochemical exploration indicators could offer technical assistance to the prospecting for similar ore deposits in this area and broaden the geological exploration thinking for other types of ore deposits. The anomaly upper/lower limits of these geochemical exploration indicators can be determined by log cumulative frequency scatter diagram.
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Received: 07 April 2011
Published: 10 April 2012
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