Lithogeochemical Features and Emplacement of the Carboniferous Granite in the Nalati Structure-Magmatite Zone of
详细信息
- 责任者：Wang Jieming (Geological Survey of Shaanxi Province ; Xi’an 710065 ; China) ; Zhao Wenping
- 刊名：Geology of Shaanxi
- 出版年：2010
- 卷期：28(2)
- 关键词：花岗岩 ; granite ; 天山 ; Tianshan Mountains
- 页码：p.47-52
- 图表：6 illus.
- 分类号：0801
- issnNo：ISSN1001-6996
- isbnNo：CN61-1150/P
摘要
The Carboniferous magmation in the Nalati structure-magmatite zone of Western Tianshan Mountains is well developed with intermediate rock and acidic rock outcropping in different degrees.Geological survey at 1：50 000 in the mineralized areas around Xinyuan forest management area has distinguished two sequences of mixed source and crustal source,from which 6 phases are divided further.Studies indicated that fine-grained quartz diorite,tonalite and mesograined granodiorite associations are attributed into the mixed sources and the major source of magma was from earth crust and mantle,belonging to products formed by subduction under island-arc setting.The association by mesograined monzogranite,mesograined porphyritic monzogranite and mesogrined-finegrained monzogranite formed the crustal source and the magmatite was mainly from earth crust,belonging to “S”-type granite and showing a collision setting.The general evolution of the Carboniferous magma present from neutrality to acidity evolution,reflecting geological feature with forceful emplacement.