Mineralogical Characteristics of Skarns in Langdu Skarn Copper Deposit, Zhongdian, Yunnan Province, Chinaoft-com:office:office" />
详细信息
- 责任者：Ren Tao (Faculty of Land and Resource Engineering ; Kunming University of Science and Technology ; Kunming 650093 ; China) ; Zhong Hong
- 刊名：Acta Mineralogica Sinica
- 出版年：2013
- 卷期：33(3)
- 页码：p.278-286
- issnNo：ISSN1000-4734
- isbnNo：CN52-1045/P
摘要
Langdu skarn copper deposit is an important skarn copper deposit hosted by the transition zone of Triassic Qugasi Formation and intrusive rocks in Zhongdian area,NW Yunnan,China.Its skarn mineral mainly consists of garnet,pyroxene,amphibole,epidote and etc.Using electronic probe,we detailed analyzed the chemical composition of major skarn minerals.Results show that garnet is andradite to grossular solid solution series,ranging in composition of Ad57-94Gr6-41Al1-3.End-member of pyroxene is Hd78-92Di3-12Jo5-9,falling into calcium group.Actinolite,grunerite,epidote,and calcite are abundant.Different mineral assemblages reflect that the environment of skarn formation experienced the conversion from relatively high temperature under oxidation condition to low temperature under reduction condition.