Discuss on the Relationship between Granitic Rocks and Au-Cu-W-Sn-Mineralization
详细信息
- 责任者：Zhang Qi (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China)
- 刊名：Gansu Geology
- 出版年：2013
- 卷期：22(2)
- 关键词：金矿 ; gold ores ; 铜矿 ; copper ores ; 钨矿 ; tungsten ores ; 锡矿 ; tin ores ; 花岗岩型矿床 ; granite type deposit
- 页码：p.1-13
- 图表：illus., 78 refs.
- 分类号：1001
- issnNo：ISSN1004-4116
- isbnNo：CN 62-1191/P
摘要
The relationship between Au-Cu-W-Sn mineralization and granitic rocks is a topic which are concerned in academic circles.The popular magmatic hydrothermal metallogenic theory assumed that W-Sn deposits are high temperature hydrothermal deposits;Au-Cu deposits are mesothermal deposits;Pb-Zn deposits are low temperature hydrothermal deposits.The deposits are related with granites in time,space and genesis and they are distributed around the rock body.W-Sn deposits are distributed nearly the rock body,and outward for Au-Cu deposits,Pb-Zn deposits to the distance.In a metallogenic belt,there are numerous examples that W-SnAu-Cu-Pb-Zn deposits are located in the same place.But our research shows that Au-Cu deposits are related with adakitic-type and Himalayan-type granitic rocks which formed from thicked crust,whereas W-Sn deposits are related with Nanling-type granitic rocks which formed from thinned crust.Therefore,adakitic-type granitic rocks and Nanling-type granitic rocks cannot be located in the same place at the same time.So do Au-Cu-W-Sn deposits.There are two kinds of interpretation about W-Sn-Au-Cu-Pb-Zn deposits are located in the same place: one is these deposits have different metallogenic epochs,another one is these deposits are located in the places with crust thickness rapid changes.In order to find the relationship between Au-Cu and W-Sn mineralization,we need three aspects data at least:(1)metallogenic epochs of different deposits;(2)the relationship between different deposits and granitic rocks and geochemical characters and isotope age of the granitic rocks;(3)the genesis and types of different deposits.
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