• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geodynamics >Basement structure and properties of the southern Junggar Basin
【24h】

Basement structure and properties of the southern Junggar Basin

机译：准Jung尔盆地南部的地下构造与性质

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

We have investigated the detailed structures of velocity, density and magnetization intensity along a nearly east west profile from Liugou to Dajing across the southern Junggar Basin using the seismic converted wave profiling and joint inversion of gravity and geomagnetic data. Our observations reveal such important interfaces as interface B (the top surface of the folded basement), interface G (the top surface of the crystalline basement), interfaces C-1 and C-2 (interfaces within the crust), and the Moho (the bottom of the crust). Our results indicate that the crust of southern Junggar Basin with a thickness of 45-50 km and the average velocity of similar to 6.3 km/s is mainly composed of an upper crust (including a deposited cover), a middle crust and a lower crust. The top surface of the crystalline basement (G) and the bottom of the crust (Moho) undulate in a same way, indicating an integrated crustal deformation. A series of faults developed in the basin are oriented nearly north-south and cut through the crystalline crust. The faults serve as passageways connecting the crust and upper mantle and are inferred to have formed by north-south compression and east-west extension. We propose that materials from the upper mantle migrate upward into the crust, intrude laterally, and mix up with the crustal materials, producing a crystalline crust in the basin with high velocity, high density and high geomagnetic intensity. Our observations suggest that the southern Junggar Basin bears a single basement layer whose properties have been changed by the exchange of the materials and the energy of the crystalline crust with those from the upper mantle.
机译：我们利用地震转换波剖面以及重力和地磁数据的联合反演，研究了穿越准Jung尔盆地南部从柳沟到大井近东西剖面的速度，密度和磁化强度的详细结构。我们的观察结果揭示了重要的界面，例如界面B（折叠后的基底的顶面），界面G（晶体基底的顶面），界面C-1和C-2（地壳内的界面）以及Moho（地壳的底部）。结果表明，准Jung尔盆地南部地壳厚度为45-50 km，平均速度约6.3 km / s，主要由上地壳（包括沉积盖层），中地壳和下地壳组成。 。晶体基底（G）的顶面和地壳（Moho）的底面以相同的方式起伏，表明地壳整体变形。盆地中形成的一系列断层几乎位于南北向，并贯穿了晶体壳。断层是连接地壳和上地幔的通道，并推测是由南北向压缩和东西向伸展形成的。我们建议上地幔中的物质向上迁移到地壳中，横向侵入并与地壳物质混合，从而在盆地中产生具有高速度，高密度和高地磁强度的结晶地壳。我们的观察结果表明，准Jung尔盆地南部只有一个基底层，其性质已通过与上地幔物质的交换以及结晶壳的能量和能量的变化而改变。

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