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T-bana: Universitetet
Frescativägen 40

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Tisdag-söndag 10-18


  • Huvudmeny

Crustal reworking along continental margins: juvenile and ancient crust of the Eastern Ghats Belt, India

Folded mafic dyke in granulite, Eastern Ghats Belt, India.

Folded mafic dyke in granulite, Eastern Ghats Belt, India.

Summary

The Eastern Ghats Belt (EGB) in eastern India is a composite granulite and gneiss terrane that has a complex geological history involving repeated high-temperature metamorphism and deforma-tion from the Proterozoic to the early Phanerozoic. The belt is correlated with the Rayner Complex in East Antarctica in continental reconstruction models. Both terranes have been commonly explai-ned as having formed by orogenic collisions between Proto-India and East Antarctica during the assembly or Rodinia at ~1.0 Ga. The EGB thus serves as a crucial link in understanding Proterozoic and Phanerozoic Indo-Antarctic tectonics.

The aim of this project is: 1) to better constrain the timing of juxtaposition of the various terranes, and 2) to investigate the correlation between units to the north and south of the Godavari Rift. This will be done using laser ablation ICP-MS U-Pb dating of zircon from each of the terranes along four transects perpendicular to the orogenic belt. Zircon is the mineral of choice, because it is highly robust and capable of retaining primary age information. The age results will contribute to a better understanding of Rodinia assembly and the tectonometamorphic histories of the different domains.

Project participants at NRM

External project participants

  • Prof. Klaus Mezger, University Bern, Switzerland
  • Prof. Dewashish Upadhyay, Indian Institute of Technology, Kharagpur, India