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The geotectonic position of the Madurai block (south India) within Gondwana: its formation and tectono-metamorphic evolution reconstructed with SHRIMP zircon analyses, EPMA-monazite dating, and petrology

冈瓦纳大陆内马杜赖地块（印度南部）的大地构造位置：利用 SHRIMP 锆石分析、EPMA-独居石测年和岩石学重建其形成和构造变质演化

基本信息

批准号：
16092485
负责人：
Professor Dr. Volker Schenk
金额：
--
依托单位：
Abteilung Geochemie/Petrologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2009-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/16092485?language=en
关键词：
geotectonic position Madurai block south

项目摘要

The project is a cooperation between the universities of Kiel, Bonn, Köln and Mysore and part of the ILP-project "LEGENDS". It is supplementary to a seismic profile, which runs north-south through the Indian peninsula towards Sri Lanka. This profile intersects major shear zones and possible suture zones separating distinct crustal terrains of the Pan-African East African - Antarctic Orogen formed during the assembly of Gondwana. The aim of this petrological-structural-geochronological project is to unravel the formation and tectono-metamorphic evolution of the Madurai Block of the Southern Granulate Terrain of India, which is bounded by the Palghat-Cauvery shear zone (a possible suture) in the north and by the Achankovil shear zone in the south. The results will help to understand the geodynamic evolutions that affected the Madurai block during the formation of the supercontinent Gondwana and possibly that of Rodinia. The definition and recognition of specific crustal domains and the knowledge of their tectono-metamorphic evolution will contribute to the interpretation of seismic data along the profile. In addition, the results will help to correlate crustal domains in the now dispersed crustal fragments of the Gondwana supercontinent.

该项目是基尔、波恩、Köln和迈索尔大学之间的合作项目，也是ilp项目“LEGENDS”的一部分。它是对地震剖面的补充，地震剖面从北向南穿过印度半岛，一直延伸到斯里兰卡。该剖面与主要剪切带和可能的缝合带相交，这些剪切带分隔了冈瓦纳组合期间形成的泛非、东非-南极造山带的不同地壳地形。这个岩石学-构造-地质年代学项目的目的是揭示印度南部颗粒状地形的马杜莱地块的形成和构造变质演化，该地块由北部的Palghat-Cauvery剪切带（可能的缝合带）和南部的Achankovil剪切带所连接。这些结果将有助于了解在冈瓦纳超大陆形成期间影响马杜赖地块的地球动力学演化，也可能是罗迪尼亚的地球动力学演化。特定地壳域的定义和识别及其构造变质演化的认识将有助于沿剖面地震资料的解释。此外，这些结果将有助于冈瓦纳超大陆现在分散的地壳碎片中的地壳域的关联。