| 摘要: |
| 木纳布拉克蛇绿岩是新疆境内最大的蛇绿混杂岩带,由超镁铁质岩、镁铁质岩、浅色分异物和变玄武岩组成,形成时代为中元古代晚蓟县世,侵位时代为新元古代早青白口世,可能代表了阿尔金山地区中元古代的板块俯冲带。蛇绿岩可能形成于孤后或孤间有限洋盆小扩张脊;最后侵位到深海沉积物中,形成了造山带中的蛇绿岩。 |
| 关键词: 木纳布拉克 蛇绿岩带 地球化学 新疆 |
| DOI： |
| 附件 |
| 投稿时间：2005-04-15 |
| 基金项目:青藏高原1∶25万且末县一级电站幅区域地质调查项目(19991300009051)。 |
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| Geochemistry and tectonic setting of the Munabulak ophiolites in Xinjiang |
| DENG Rui-lin, MA Tie-qiu, BAI Dao-yuan |
(1. China University of Geosciences, Wuhan 430074, Hubei, China;
2. Hunan Institute of Geological Survey, Xiangtan 411100, Hunan, China) |
| Abstract: |
| The Munabulak ophiolites as the largest ophiolitic mélange zone in Xinjiang are made up of ultramafic rocks,mafic rocks,light-coloured rocks and meta-basalts which may be traced back to the Jixianian of the Mesoproterozoic for their formation and the early Qingbaikouan of the Neoproterozoic for their emplacement,and represent the subduction zone in the Altun region during the Mesoproterozoic.These ophiolites may be originated from the small spreading oceanic ridges of back-arc or inter-arc restricted oceanic basins,and finally emplaced into the deep-sea sediments constituting the ophiolites in orogenic zones. |
| Key words: Munabulak ophiolite zone geochemistry Xinjiang |
