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Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities

The India–Asia collision zone is the archetype to calibrate geological responses to continent–continent collision, but hosts a paradox: there is no orogen-wide geological record of oceanic subduction after initial collision around 60–55 Ma, yet thousands of kilometers of post-collisional subduction...

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Autor principal: van Hinsbergen, Douwe J J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9385461/
https://www.ncbi.nlm.nih.gov/pubmed/35992242
http://dx.doi.org/10.1093/nsr/nwac074
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author van Hinsbergen, Douwe J J
author_facet van Hinsbergen, Douwe J J
author_sort van Hinsbergen, Douwe J J
collection PubMed
description The India–Asia collision zone is the archetype to calibrate geological responses to continent–continent collision, but hosts a paradox: there is no orogen-wide geological record of oceanic subduction after initial collision around 60–55 Ma, yet thousands of kilometers of post-collisional subduction occurred before the arrival of unsubductable continental lithosphere that currently horizontally underlies Tibet. Kinematically restoring incipient horizontal underthrusting accurately predicts geologically estimated diachronous slab break-off, unlocking the Miocene of Himalaya–Tibet as a natural laboratory for unsubductable lithosphere convergence. Additionally, three endmember paleogeographic scenarios exist with different predictions for the nature of post-collisional subducted lithosphere but each is defended and challenged based on similar data types. This paper attempts at breaking through this impasse by identifying how the three paleogeographic scenarios each challenge paradigms in geodynamics, orogenesis, magmatism or paleogeographic reconstruction and identify opportunities for methodological advances in paleomagnetism, sediment provenance analysis, and seismology to conclusively constrain Greater Indian paleogeography.
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spelling pubmed-93854612022-08-18 Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities van Hinsbergen, Douwe J J Natl Sci Rev Review The India–Asia collision zone is the archetype to calibrate geological responses to continent–continent collision, but hosts a paradox: there is no orogen-wide geological record of oceanic subduction after initial collision around 60–55 Ma, yet thousands of kilometers of post-collisional subduction occurred before the arrival of unsubductable continental lithosphere that currently horizontally underlies Tibet. Kinematically restoring incipient horizontal underthrusting accurately predicts geologically estimated diachronous slab break-off, unlocking the Miocene of Himalaya–Tibet as a natural laboratory for unsubductable lithosphere convergence. Additionally, three endmember paleogeographic scenarios exist with different predictions for the nature of post-collisional subducted lithosphere but each is defended and challenged based on similar data types. This paper attempts at breaking through this impasse by identifying how the three paleogeographic scenarios each challenge paradigms in geodynamics, orogenesis, magmatism or paleogeographic reconstruction and identify opportunities for methodological advances in paleomagnetism, sediment provenance analysis, and seismology to conclusively constrain Greater Indian paleogeography. Oxford University Press 2022-04-21 /pmc/articles/PMC9385461/ /pubmed/35992242 http://dx.doi.org/10.1093/nsr/nwac074 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Review
van Hinsbergen, Douwe J J
Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title_full Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title_fullStr Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title_full_unstemmed Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title_short Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities
title_sort indian plate paleogeography, subduction and horizontal underthrusting below tibet: paradoxes, controversies and opportunities
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9385461/
https://www.ncbi.nlm.nih.gov/pubmed/35992242
http://dx.doi.org/10.1093/nsr/nwac074
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