SHEN Si-lian, LI Jian-ping, YANG Bao-fu

 

(Yunnan Tin Company Limited, Gejiu 661000, China)

 

Abstract: An altered granite type of Sn-Cu polymetallic mineralization, as a new resource type, is characterized by wide distribution and huge potential prospecting in Gejiu ore area, Yunnan Province, China. Geological mineralization characteristics, granite petrology, alteration zones, and geological of the mineralization were researched and suggested that the mineralization was related to the post-magmatic hydrothermal of Yanshanian granite, with the ore-forming material sources of multi sources and dominated by the granite. The assemblages of potassic-alteration, silicatization and fluoritization are the most important alteration and signs for prospecting of the mineralization. The orebody occurrence was controlled by the surface morphology of granite, and the top and around Laoka rock mass will be key prospecting target for mineralization. The distinguishing alteration zones and the anomaly extension of ore-forming elements by geological and geochemical research will be useful for reducing exploration risk, and will help developing the exploration of altered granite type resource in eastern Gejiu ore area.

 

Keywords: Altered granite type Sn-Cu polymetallic mineralization; Geology and geochemistry; alteration zone; prospecting target; Gejiu Sn polymetallic deposit

 

 

ACTA MINERALOGICA SINICA Vol. 36, No. 4, 2016, Page 471-478