...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Petrogenesis and Sr-Nd isotope data of the Chadegan metabasites, Sanandaj-Sirjan Zone, Iran
【24h】

Petrogenesis and Sr-Nd isotope data of the Chadegan metabasites, Sanandaj-Sirjan Zone, Iran

机译：伊朗Sanandaj-Sirjan地区Chadegan变质岩的成因作用和Sr-Nd同位素数据

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The metabasites of Chadegan belong to the Sanandaj-Sirjan Zone and include eclogite, garnet amphibolite and amphibolite that have been affected by several tectono-metamorphic events. These rocks were metamorphosed during subduction of Neo-Tethys ocean crust under Eurasia. Subsequent exhumation occurred by upwards-directed mass flow in a subduction channel during continental collision between the Afro-Arabian continent and the Iranian micro-continent. Trace element geochemistry and high total REE concentrations show that the protoliths of the studied metabasites has an E-MORB character and formed in an ocean ridge setting. Slightly positive initial epsilon(ND) values (+1.5 to +3.8 at 190 Ma) agree with an origin of the parental magmas in a mantle source that did not undergo severe depletion events, whilst a large range of (Sr-87/Sr-86)(i) values (0.70690 to 0.71624) testifies for the strong influence of continental crustal fluids during regional metamorphism.
机译：Chadegan的变质岩属于Sanandaj-Sirjan地带，包括榴辉岩，石榴石闪石和闪石，这些闪石受到了几次构造变质事件的影响。这些岩石在欧亚大陆下的新特提斯洋壳俯冲过程中变质了。随后的掘尸工作是在非洲阿拉伯大陆与伊朗微大陆之间发生大陆碰撞时，在俯冲通道中向上定向的质量流发生的。微量元素地球化学和较高的总REE浓度表明，所研究的新生代原生质岩具有E-MORB特征，并形成于海脊环境中。 ε（ND）初始值略为正（190 Ma时为+1.5至+3.8），与未经历严重耗尽事件的地幔源中的母岩浆起源一致，而较大范围的（Sr-87 / Sr- 86）（i）值（0.70690至0.71624）证明了在区域变质过程中大陆地壳流体的强烈影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号