Magma Mixing in the Karamay Rock Body of West Junggar , Xinjiang: Evidence from Geochemistry
详细信息
- 责任者：Zou Tao (Faculty of Land Resource Engineering ; Kunming University of Science and Technology ; Kunming 650093 ; China) ; Wang Jingbin
- 刊名：Geology in China
- 出版年：2011
- 卷期：38(1)
- 关键词：石英闪长岩 ; quartz diorite ; 混合作用 ; hybridization ; 岩石地球化学 ; lithogeochemistry ; 新疆 ; Xinjiang
- 页码：p.65-76
- 图表：6 illus., 1 table, 33 refs.
- 分类号：0801
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
The Karamay intrusive body in western Junggar of Xingjiang is associated with abundant dioritic microgranular enclaves and magma mixed rock of quartz diorite. Host rocks, magma mixed rocks, dioritic microgranular enclaves and diorite porphyrite dykes of the Karamay rock body are products of different proportions of magma mixing. The ratios of characteristic elements and isotopic signatures show that the source rock of the dioritic enclaves is the mantle-derived basic magma,and that the host rock is the crust-derived acidic rock. The geochemical characteristics of the rock further prove the existence of magma mixing in the Karamay rock body, suggesting that the magma mixing was an important style of post-collisional magmatism in northern Xinjiang.