eprintid: 9407
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/94/07
datestamp: 2023-11-09 16:21:23
lastmod: 2023-11-09 16:21:23
status_changed: 2023-11-09 16:15:02
type: article
metadata_visibility: show
creators_name: Ramkumar, M.
creators_name: Menier, D.
creators_name: Mathew, M.
creators_name: Santosh, M.
creators_name: Siddiqui, N.A.
title: Early Cenozoic rapid flight enigma of the Indian subcontinent resolved: Roles of topographic top loading and subcrustal erosion
ispublished: pub
keywords: arc-arc collision; Cenozoic; continental drift; geomorphology; isostasy; mantle plume; plate motion; topography; volcanism, Deccan; India
note: cited By 28
abstract: Intrinsic magmatic processes are considered as critical operators of plate movements. Here we demonstrate the role of extrinsic processes consequent to intrinsic processes as a catalyst for anomalous rapid plate movement. The rapid and accelerated flight of the Indian subcontinent since Deccan volcanism until its collision with Eurasia remains as one of the geological conundrums. Data on seismic tomography, peninsular geomorphology and inferences on continuum of subcrustal structures are utilized to address this enigma. We propose geomorphic isostasy as the mechanism that has driven this fastest drift ever recorded in geological history. It was initiated by sudden instability after the Deccan volcanism and resultant extensive accumulation of lava pile over continental lithosphere of northern India, northern-eastern tilt due to crustal thickness heterogeneity and subcrustal thermal stratification. The drift was sustained by Carlsberg and Central Indian ridge-push until collision and sediment top loading at northeast thenceforth. These inferences and geomorphic isostasy as a catalytic mechanism necessitate variability of drift rates as integral inputs for any continental scale modeling. © 2016 China University of Geosciences (Beijing) and Peking University
date: 2017
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006371526&doi=10.1016%2fj.gsf.2016.05.004&partnerID=40&md5=32050772411166050d605aa63019741f
id_number: 10.1016/j.gsf.2016.05.004
full_text_status: none
publication: Geoscience Frontiers
volume: 8
number: 1
pagerange: 15-23
refereed: TRUE
issn: 16749871
citation:   Ramkumar, M. and Menier, D. and Mathew, M. and Santosh, M. and Siddiqui, N.A.  (2017) Early Cenozoic rapid flight enigma of the Indian subcontinent resolved: Roles of topographic top loading and subcrustal erosion.  Geoscience Frontiers, 8 (1).  pp. 15-23.  ISSN 16749871