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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (4): 39-46.doi: 10.11872/j.issn.1005-2518.2016.04.039

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Geological Geochemical Characteristics and Genesis of Wangjiaping Gold Deposit

LIU Xinwei，WANG Chao，HAN  Lu，XUE Yushan，XUE Lei，ZHU Lei   

  1. Xi’an Northwest Research Institute of Nonferrous Metals Co.，Ltd.，Xi’an   710054，Shaanxi，China
  • Received:2016-04-24 Revised:2016-06-16 Online:2016-08-28 Published:2016-11-17

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Abstract:

Wangjiaping gold deposit is hosted in carbonate formation of upper Devonian Xinghongpu Group，and ore bodies are occur as lenticular，controled by secondary tensional fault around the main fault.Wall rock alterations include pyritization，silicification，orpiment，realgar，carbonization and iron carbonate and so on.In the mining area，Au and Hg，Sb and As are low temperature elements，which have linear correlation.The total amount of rare elements in ores is 94.71×10-6 to 141.03×10-6，average is 117.3×10-6，（La/Sm）N changes in the range from 3.86 to 4.52，which are different from the wall rocks.This shows that the source of ore-forming materials is not wall rocks，but probably come from the deep magma and underlying rock column.Hydrogen and oxygen isotopic characteristics show that the source of the water mainly originated from are magmatic and rain water.The range of δ34S is from -1.51‰ to 12.8‰，the average value is 6.54‰，sulfur may originated from mixture of magmatic hydrothermal and sour formation.The range of major metallogenic temperature is from 90 ℃to 140 ℃，the mineralizing fluid is medium salinity and low density fluid，and average value of metallogenic pressure is 133 MPa.The genetic type of the deposit belongs to medium and shallow low temperature hydrothermal type deposit.

Key words: geological characteristics, geochemical characteristics, deposit genesis, Wangjiaping gold deposit, Shaanxi Province

CLC Number: 

  • P618.51

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