NDLI: Indo-Burma Range: a belt of accreted microcontinents, ophiolites and Mesozoic

Content Provider	Springer Nature Link
Author	Acharyya, S. K.
Copyright Year	2015
Abstract	This study provides an insight into the lithotectonic evolution of the N–S trending Indo-Burma Range (IBR), constituting the southern flank of the Himalayan syntaxis. Paleogene flyschoid sediments (Disang–Barail) that represent a shallow marine to deltaic environment mainly comprise the west-central sector of IBR, possibly resting upon a continental base. On the east, these sequences are tectonically flanked by the Eocene olistostromal facies of the Disang, which developed through accretion of trench sediments during the subduction. The shelf and trench facies sequences of the Disang underwent overthrusting from the east, giving rise to two ophiolite suites (Naga Hills Lower Ophiolite (NHLO) and Victoria Hills Upper Ophiolite (VHUO), but with different accretion history. The ophiolite and ophiolite cover rock package were subsequently overthrusted by the Proterozoic metamorphic sequence, originated from the Burmese continent. The NHLO suite of Late Jurassic to Early Eocene age is unconformably overlain by mid-Eocene shallow marine ophiolite-derived clastics. On the south, the VHUO of Mesozoic age is structurally underlain by continental metamorphic rocks. The entire package in Victoria Hills is unconformably overlain by shallow marine Late Albian sediments. Both the ophiolite suites and the sandwiched continental metamorphic rocks are thrust westward over the Paleogene shelf sediments. These dismembered ophiolites and continental metamorphic rocks suggest thin-skinned tectonic detachment processes in IBR, as reflected from the presence of klippe of continental metamorphic rocks over the NHLO and the flyschoid Disang floor sediments and half windows exposing the Disang beneath the NHLO.
Starting Page	1235
Ending Page	1251
Page Count	17
File Format	PDF
ISSN	14373254
Journal	International Journal of Earth Sciences
Volume Number	104
Issue Number	5
e-ISSN	14373262
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-03-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Indo-Burma Range Paleogene continental flysch Olistostromal trench deposits Ophiolite accretion Thin-skin tectonics Crustal structure Geology Geophysics/Geodesy Sedimentology Structural Geology Mineral Resources Geochemistry
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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