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INDO-BURMESE COLLISION OCCURRED AT EOCENE EVIDENCE FROM THE DETRITAL FISSION TRACK THERMOCHRONOLOGY OF NORTHEAST INDIA
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  • RAMAMOORTHY ramamoorthy,
  • Ramasamy Sooriamuthu,
  • Gnanachandrasamy Gopalakrishnan,
  • Nusrat Nazir,
  • Xiaozhong Huang
RAMAMOORTHY ramamoorthy
University of Madras

Corresponding Author:[email protected]

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Ramasamy Sooriamuthu
University of madras
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Gnanachandrasamy Gopalakrishnan
Sun yat sen university
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Nusrat Nazir
Lanzhou Univesity
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Xiaozhong Huang
Lanzhou University
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Abstract

Nagaland is part of the northern extension of the Indo Myanmar range(IMR).This area is representative of several orogenic upheavals in the Cretaceous-Tertiary that form a relativelyyoung and mobile land belt.Nagaland is the most recent crustal reaction to the collision of theIndian and Burmese Plate.Barail formation emerged at the active margin of the Indo-Burmeseplateconvergence.The majority of the available tectonic replica proposes that themalformation and uplift of the Northeastern. We aimed at the highlights of exhumation andsedimentation, and its other host processes like provenance characteristics of the Barail sandstones from Nagaland, India.Systematic geological mapping of approximately 50 square meters has been carried out in the study area.A geological map of the study area was made on a scale of 1:50,000 in the Indian Topsheet No.58M/4 survey in the Kohima district of Nagaland.The region was mapped according to need and accessibility by taking the traverses along the highways, footpaths and across the ranges.In this study,four quarry samples disseminated in various folds in the Barail Group yielded the ages ranging from 37.4±1.5Ma to 49.9±2.4Ma and younger than their predecessor sedimentary deposition ages(86.92-181.81Ma).The binomial distribution clearly stated that from 46.0to32.0Ma,the grain ages fitted peaks are usually dominated by the youngpeak.Combined with an interpretation of the origin,the detrital zircon of the young peak age and rocks indicated that most significant uplifting of the Barail Group occurred during EocenetotheOligocene,almost timed to coincide with the colliding of the Indo-Burmese plate more around ~35-50Ma.Such findings have been consistent with the current geology of Naga Hills in theprovince of Nagaland.