The Granulite Terrane of South India (GTSI) has two major components. An orthogneiss dominated northern block of Archaean/early Palaeoproterozoic age and an Ediacaran-Cambrian, high to ultra-high temperature meta-supracrustal dominated southern block (the Madurai Block, MB). It is commonly perceived that the two blocks of GTSI came into juxtaposition along the Palghat-Cauvery Shear/Suture Zone (PCSZ) during a continent-continent collision. However, the timing and the nature of the contact relations between the two major components remains controversial. In this work, detail petrological and geochronological study of two metapelites along with a meta-psammite (only for geochronological study), from the Madukkarai Supracrustal Unit (MSU) within the PCSZ, are presented. The studied metapelites show two distinct assemblages:

中文翻译：

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泰米尔纳德邦马杜卡拉伊一套变质上地壳岩石的岩石学和地质年代学：对南印度粒粒岩地体埃迪卡拉纪-寒武纪造山作用的影响

南印度麻粒岩地体 (GTSI) 有两个主要组成部分。太古代/古元古代早期的北部地块以正片麻岩为主，而南部地块（马杜赖地块，MB）以埃迪卡拉纪-寒武纪高温至超高温变表壳为主。人们普遍认为，在大陆与大陆碰撞期间，GTSI 的两个区块沿着帕尔加特-高韦里剪切/缝合带 (PCSZ) 并置。然而，两个主要组成部分之间接触关系的时间和性质仍然存在争议。在这项工作中，介绍了来自 PCSZ 内马杜卡莱表层单元 (MSU) 的两种变泥岩和变砂岩（仅用于地质年代学研究）的详细岩石学和地质年代学研究。研究的变泥岩显示出两种不同的组合：