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

该项目是基尔大学、波恩大学、科伦大学和迈索尔大学之间的合作项目，是ILP项目“传奇”的一部分。它是对地震剖面的补充，地震剖面贯穿印度半岛，由北向南延伸至斯里兰卡。这一剖面与主要剪切带和可能的缝合带相交，这些缝合带分隔了冈瓦那组装期间形成的泛非东非-南极造山带的不同地壳地体。这项岩石学-构造-年代学项目的目的是揭示印度南部花岗岩地区马杜赖地块的形成和构造变质演化，该地块北部为Palghat-Cauvery剪切带(可能是缝合线)，南部为Achankovil剪切带。这一结果将有助于理解在冈瓦那超大陆和罗迪尼亚超大陆形成过程中影响马杜赖地块的地球动力学演化。对特定地壳区域的定义和识别以及对它们的构造变质演化的了解将有助于沿剖面的地震数据的解释。此外，这一结果将有助于将冈瓦那超大陆现在分散的地壳碎片中的地壳区域联系起来。

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.