Geochemical Characteristics and Geochronology of Sherbulake Ophiolite in Xinjiang
详细信息
- 责任者：Zhu Fang (No.7 Geological Team ; Bureau of Geology and Mineral Resources of Zhejiang Province ; Hangzhou 310000 ; China) ; Zhao Tongyang
- 刊名：Xinjiang Geology
- 出版年：2013
- 卷期：31(3)
- 关键词：蛇绿岩 ; ophiolite ; 新疆 ; Xinjiang
- 页码：p.167-172
- 图表：5 illus., 2 tables, 10 refs.
- 分类号：0801
- issnNo：ISSN1000-8845
- isbnNo：CN65-1092/P
摘要
The article mainly introduces the material composition,geochemical characteristics,geochronology and Emplacement mechanism of Sherbulake ophiolite.The ophiolite includes ophiolite fragment,overlying rocks and exotic block,the mafic volcano rock with loss of high field elements and enrichment of large ion lithophile elements,chondrite normalized REE curves generally flat,fractionation of the weaker,indicate the magma of mantle source region may be involved in island-arc volcano rock and mid-ocean ridge basalt composition,and get the basalt SHRIMP zircon U-Pb age of(322±9) Ma.Therefore,we think that the formation environment of Sherbulake and Kuerti ophiolite are relatively similar,formed in the back arc basin.Emplacement process should be included four stages,emplacement during subduction,emplacement of collision process,emplacement of crustal shortening and transformation of the crustal extension of southern crustal margin of the Altai basin.