The Geochemical Characteristics, Petrogenesis and Geological Significance of the Basalts in Xijiaping of Dongchuan Area, Yunnan Province

详细信息   

• 责任者：Yang Bin (Chengdu Center ; China Geological Survey ; Chengdu 610082 ; China) ; Zhou Bangguo
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2012
• 卷期：32(2)
• 关键词：玄武岩 ; basalts ; 云南 ; Yunnan Province
• 页码：p.74-80
• 图表：3 illus., 3 tables, 14 refs.
• 分类号：0801
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

摘要

Characteristics of the major,trace and rare earth elements from basalts in Xijiaping area show that it belongs to calcium alkaline-low potassium type in the chemical composition, and no large scale magmatic differentiation happened in the forming process. Therefore, chemical composition of basalt can reflect the basic feature of chemical composition of magma source. The magma source characteristics, tectonic environment and possible formation mechanism of the basalts in Xijiaping area are discussed, and conclusion reached that the basalts was formed in the tensional environment in the Kunyang rift valley in the early stage, and magma derived from the enriching mantle source area,almost no crustal material participates in the forming process.