Geochemistry Characteristics of Volcanic Rocks of Heishantou Formation in Kalamaili, East Junggar , and Tectonic Settings Implication
详细信息
- 责任者：Yang Gaoxue (Key Laboratory of Western China’s Mineral Resources and Geological Engineering ; Ministry of Education ; Xi’an 710054 ; China) ; Li Yongjun
- 刊名：Xinjiang Geology
- 出版年：2011
- 卷期：29(3)
- 关键词：火山岩 ; volcanic rocks ; 准噶尔盆地 ; Junggar Basin
- 页码：p.257-262
- 图表：3 illus., 2 tables, 27 refs.
- 分类号：0801
- 出版序号：1659
- issnNo：ISSN1000-8845
- isbnNo：CN65-1092/P
摘要
///Carboniferous volcanic rocks mainly composed of basalts, basaltic andesites and andesites occur within Lower Heishantou Formation, north of Kalamaili ophiolite in the eastern Junggar, and are mainly high K calc-alkaline series. Geochronology and geochemistry characteristics indicate the Early Carboniferous magmas movement not only shows the characteristics of intraplate magmatic evolution, but also has traces of arc volcanic rock geochemistry, they are maybe from extensional settings of post-collisional period. They are produced by the ascending and melting of asthenospheric material, and the magmas were contaminated by the arc component formed before Early Carboniferous in the processes of uplift and emplacement.