...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Does the Laxmi Ridge continue towards the Laccadive Ridge? New insights from an integrated geophysical study
【24h】

Does the Laxmi Ridge continue towards the Laccadive Ridge? New insights from an integrated geophysical study

机译：LAXMI RIDGE是否继续朝向漆脊？集成地球物理研究的新见解

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 Laxmi and Laccadive ridges are two major aseismic ridges in the NW Indian Ocean. Bathymetry, gravity and magnetic data and their derivatives are analyzed and modelled to assess interrelationship between both the ridges as well as to establish their crustal structure, nature and isostatic compensation. Boundaries of the Laxmi and Laccadive ridges are delineated by tilt derivative with constraints from available seismic-sections. Integrated gravity and magnetic models reveal that both the ridges have almost similar crustal layers and are underplated all along its length. Crustal models also depict that both the ridges are carpeted with flood basalt and heavily intruded. 3D coherence between mantle Bouguer anomaly and residual bathymetry reveals that the elastic plate thickness and subsurface to surface load ratio for both the ridges vary from 3 to 4 km and 0.7 to 0.8, respectively. Several characteristic similarities viz. crustal structure and nature, elastic plate thickness, magmatism have been observed for both the ridges. Seismic sections near the junction of the ridges suggest that the basement high corresponding to the Laxmi Ridge is further continued towards the Laccadive Ridge. In addition, the northwestern part of the Laccadive Ridge has NW-SE structural lineaments similar to that of the NW-SE segment of the Laxmi Ridge. Based on results of the present and previous studies, we infer that (i) the Laxmi Ridge is extended southeastward towards the Laccadive Ridge, (ii) both the ridges are continental slivers which are underplated as well as intruded and carpeted by volcanics, and (iii) both the ridges are locally compensated.
机译：Laxmi和漆脊是NW印度洋的两个主要抗震山脊。分析碱基，重力和磁性数据及其衍生物，并建模以评估山脊之间的相互关系，以及建立其地壳结构，性质和等静电补偿。 LAXMI和漆脊的边界通过倾斜衍生物与可用地震部分的约束划分。综合重力和磁模型表明，两个脊都具有几乎相似的地壳层，并且沿其长度盖板。地壳模型还描绘了山脊的覆盖，洪水玄武岩和严重侵入。 Mantle Bouguer异常和残留浴型之间的3D相干性揭示了弹性板厚度和地下脊的表面负荷，分别为3至4km，0.7至0.8分别变化。几个特征性相似之处viz。对于脊而言，已经观察到地壳结构和性质，弹性板厚度，岩浆岩。接近脊的连接附近的地震截面表明，对应于LAXMI脊的基底进一步朝向漆脊。此外，漆脊的西北部有NW-SE结构谱系，类似于LAXMI脊的NW-SE段的结构谱系。基于目前和以前的研究结果，推断（i）LAXMI山脊以东南延伸到漆脊，（ii）脊双脊是由火山侵入和铺设的陆地泥，（ iii）脊局部都是局部补偿。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2020年第1期|104491.1-104491.14|共14页
  • 作者

    Mishra Akhil; Chaubey Anil Kumar; Kumar Shravan; Kumar Pitchika Vinay; Kumar Pankaj; Dubey Kanchan Mani;

  • 作者单位

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|CSIR Natl Inst Oceanog Acad Sci & Innovat Res Panaji Goa India|CSIR Natl Geophys Res Inst Hyderabad India;

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|CSIR Natl Inst Oceanog Acad Sci & Innovat Res Panaji Goa India;

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|Banaras Hindu Univ Inst Sci Dept Geophys Varanasi 221005 Uttar Pradesh India;

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|Univ Hyderabad Ctr Earth Ocean & Atmospher Sci Hyderabad India;

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|CSIR Natl Inst Oceanog Acad Sci & Innovat Res Panaji Goa India;

    CSIR Natl Inst Oceanog Reg Ctr Lokhandwala Rd Mumbai 400053 Maharashtra India|Goa Univ Dept Marine Sci Taleigao Plateau 403206 Goa India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laxmi Ridge; Laccadive Ridge; NW Indian Ocean; Gravity and Magnetic Data; Tilt Derivative; 3D Coherence;

    机译：Laxmi山脊;漆岭;NW印度洋;重力和磁数据;倾斜导数;3D连贯;

相似文献

  • 外文文献
  • 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