Characteristics of Volcanic Rocks from Galonggema Cu-Zn Polymetallic Mining Area
详细信息
- 责任者：Wu Bijuan (Key Laboratory of Metallogenic Prediction of Nonferrous Metals ; MOE ; Central South University ; Changsha 410083 ; China) ; Lai Jianqing
- 刊名：Mineral Resources and Geology
- 出版年：2013
- 卷期：27(4)
- 关键词：铜矿 ; copper ores ; 锌矿 ; zinc ores ; 多金属矿 ; polymetallic ores ; 青海 ; Qinghai Province
- 页码：p.283-291
- 图表：9 illus., 4 tables, 15 refs.
- 分类号：1001
- issnNo：ISSN1001-5663
- isbnNo：CN45-1174/TD
摘要
Magmation is severe in Galonggema Cu-Zn polymetallic mining area,and volcanic rocks which are controlled by regional tectonics are widely distributed.Based on field geological investigation and indoor re- search on rock constituents and structural tectonics,petrochemical components,and geochemical characteris- tics of volcanic rock series in Galonggema Cu-Zn polymetallic mining area,the characteristics of volcanic edi- fice and its petrographic structure are initially verified.Analysis on geochemical characteristics of dacite in this area indicates that the mining area in the Triassic period was within geotectonic setting of island arcs;the dacite was formed by differential evolution of basic magma which was formed by fusion of mantle-derived ma- terial and deep ocean sediment which was resulted from underthrusting of Paleotethys ocean crust.