Journal of Jilin University(Earth Science Edition)

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Geochemical Characteristics and Significance of Platinum Group Elements of Mafic Intrusions in Chajian Ore District in Hongqiling Deposit

Zhao Xinyun, Hao Libo, Lu Jilong, Zhao Yuyan, Wei Qiaoqiao   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun130026,China
  • Received:2012-07-17 Online:2013-05-26 Published:2013-05-26

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Abstract:

Using the 1st and the 9th mafic intrusions of the Chajian ore district in the Hongqiling copper-nickel deposit as the research objects, we analyzed their petrochemical characteristics, trace elements and rare earth elements (REE), especially the geochemical characteristics of platinum group elements (PGE). The analysis of REE shows that the rocks are enriched in light REE and have weak negative europium (Eu) anomalies. PGE are concentrated in the rocks with high sulphide content, and the PGE content and the content of sulfide are positively related. The fractionation of PGE is obviously featured by enrichment of Rh, Pt and Pd. We supposed that the basic-ultrabasic rocks were formed under sulphur undersaturated conditions,from basaltic magma contaminated by crustal materials. The source of ore-forming materials of Chajian ore district is from the upper mantle and the main mechanism is deep liquation and injection.

Key words: PGE, basic-ultrabasic rock, geochemistry, copper-nickel sulphide deposit, Chajian ore district

CLC Number: 

  • P595
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