Zircons Shrimp U-Pb Dating of Mayinerbuo Ophilit and It’s Geological Implications
详细信息
- 责任者：Liu Weiguo (No.1 Regional Geological Survey Team ; Xinjiang Bureau of Geology and Mineral Exploration and Development ; Urumqi 830013 ; China)
- 刊名：Xinjiang Geology
- 出版年：2011
- 卷期：29(4)
- 关键词：蛇绿混杂堆积 ; ophiolite complexes ; 准噶尔盆地 ; Junggar Basin
- 页码：p.385-388
- 图表：6 illus., 8 refs.
- 分类号：0300
- 出版序号：20122185
- issnNo：ISSN1000-8845
- isbnNo：CN65-1092/P
摘要
Mayinerbuo ophiolite located in Ertix-Mayinerbuo tectonic zone, layered gabbro and pillow basalt were dated using SHRIMP U-Pb method. The results indicate that concordant ages with a mean 206Pb/238U age of (397±6 ) Ma and (403±5) Ma, indicates that the Mayinerbuo Ophilit was supposed as relics of ocean basin in the northern Tianshan Mountains (Middle Palaeo-Asian oceanic crust) of the Late Silurian-Early Devonnian. The post orogenic pluton suggested that the collision of Siberia Plate and Kazakhstan-Jungger Plate before Early Permian.