Deep seismic structures beneath India and South Atlantic

印度和南大西洋下方的深层地震结构

• 批准号: 187296645
• 负责人: Professorin Dr. Christine Thomas
• 金额: --
• 依托单位: Institut für Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/187296645?language=en
• 关键词: Deep; seismic; structures; beneath; India

Through this project we are planning to investigate three different regions in the deep Earth in order to better understand the dynamical, mineralogical, and evolutionary processes of the Earth's mantle. The three areas that will be investigated are i) the D" region beneath the Atlantic, where an edge of the large low velocity anomaly beneath Africa is located, ii) The mantle transition zone structure beneath India, in order to better understand phase transitions (and their kinetics) on either side and within a subduction region and iii) the detection of deep subducted lithosphere (Tethys ocean) below the transition zone beneath India. Through a deployment of 20 newly funded seismic stations (DFG Großgeräte program) as an extension to an already running seismic experiment that studies the Alboran Sea (PICASSO/Topo Iberia) a large dataset spanning over three years covering southern Spain and Morocco will become accessible. Through the large lateral and temporal extent of the experiment, it is possible to obtain a large amount of high-resolution images of deep Earth seismic structures. We will use high-resolution seismic array methods and combine those with modelling methods and results from geodynamics and mineral physics to further our knowledge on deep Earth structures and the processes that cause them.

通过这个项目，我们计划调查地球深处的三个不同区域，以便更好地了解地球地幔的动力学、矿物学和演化过程。将要研究的三个区域是：1)大西洋下方的D区，非洲下方大型低速异常的边缘所在；2)印度下方的地幔过渡带结构，以便更好地了解两侧和俯冲区内的相变（及其动力学）；3)探测印度下方过渡带下方的深俯冲岩石圈（特提斯海洋）。通过部署20个新资助的地震台站（DFG Großgeräte计划），作为已经在运行的研究Alboran海（PICASSO/Topo Iberia）的地震实验的扩展，一个跨越三年的覆盖西班牙南部和摩洛哥的大型数据集将成为可访问的。通过大横向和大时间范围的实验，可以获得大量高分辨率的深部地震构造图像。我们将使用高分辨率地震阵列方法，并将这些方法与地球动力学和矿物物理学的建模方法和结果相结合，以进一步了解地球深部结构及其成因。

项目成果

Multiple-frequency tomography of the upper mantle beneath the African/Iberian collision zone

非洲/伊比利亚碰撞带下方上地幔的多频断层扫描

• DOI: 10.1093/gji/ggu214
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: Bonnin;Villasenor;Gallart;Thomas
• 通讯作者: Thomas

Seismic Detection of Post-perovskite Inside the Earth

• DOI: 10.1007/978-3-319-15627-9_13
• 发表时间: 2015-04
• 作者: L. Cobden;C. Thomas;J. Trampert

Crustal and upper-mantle structure beneath the western Atlas Mountains in SW Morocco derived from receiver functions

摩洛哥西南部阿特拉斯山脉西部的地壳和上地幔结构源自接收函数

• DOI: 10.1093/gji/ggu216
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: Spieker;I. Wölbern;C. Thomas;M.Harnafi;L. ElMoudnib
• 通讯作者: L. ElMoudnib

The origin of D″ reflections: a systematic study of seismic array data sets

• DOI: 10.1093/gji/ggt152
• 发表时间: 2013-08
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: L. Cobden;C. Thomas