Journal ArticleDOI
The Archipelago Group: current understanding
P. C. Bandopadhyay,Andrew Carter +1 more
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The geology and stratigraphy of the Archipelago Group are reviewed and new data presented to improve understanding in this article, where the Neogene sequences were deposited in wave-and current-agitated shallow-marine intertidal and relatively deeper-water subtidal, nearshore and offshore shelfal environments.Abstract:
The geology and stratigraphy of the Archipelago Group are reviewed and new data presented to improve understanding. Major lithofacies are bioclastic limestones, bioturbated mottled marlstones, micritic limestones, trace fossil-bearing mudstones, quartzose sandstones and reworked volcanic material of Mio-Pliocene and Pleistocene age. The succession overlies the Pre-Neogene submarine fan turbidites and tectonic melanges of ophiolite derivation and Mithakhari rocks, and is overlain by Quaternary deposits of late Pleistocene–Holocene age. The Neogene sequences were deposited in wave- and current-agitated shallow-marine intertidal and relatively deeper-water subtidal, nearshore and offshore shelfal environments. The existing stratigraphic framework is examined and suggestions made for improvement.read more
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Seismicity of the Andaman-Nicobar Islands and Andaman Sea
Andrew Carter,P. C. Bandopadhyay +1 more
TL;DR: In this article, the authors examined the history and distribution of seismicity across the Andaman-Nicobar island arc and Andaman Sea and found that seismic deformation varied along strike from uniform dip-slip on the southern (Sumatran) segment to dipslip and strike-slink components on the andaman and Nicobar segment.
Journal ArticleDOI
Paleogeography of the West Burma Block and the eastern Neotethys Ocean: Constraints from Cenozoic sediments shed onto the Andaman-Nicobar ophiolites
P. C. Bandopadhyay,Douwe J.J. van Hinsbergen,Douwe J.J. van Hinsbergen,Debaditya Bandyopadhyay,Debaditya Bandyopadhyay,Debaditya Bandyopadhyay,Alexis Licht,Alexis Licht,Eldert L. Advokaat,Eldert L. Advokaat,Alexis Plunder,Biswajit Ghosh,Arnab Dasgupta,João Trabucho-Alexandre +13 more
TL;DR: In this paper, the authors studied the provenance of clastic sediments of the Andaman-Nicobar accretionary ridge using petrography, geochemistry, and detrital zircon geochronology.
Journal ArticleDOI
Paleogeography of the West Burma Block and the eastern Neotethys Ocean: constraints from Cenozoic sediments shed onto the Andaman-Nicobar ophiolites
TL;DR: In this paper , the authors studied the provenance of clastic sediments of the Andaman-Nicobar accretionary ridge using petrography, geochemistry, and detrital zircon geochronology.
References
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Book
Sedimentary petrology : an introduction to the origin of sedimentary rocks
TL;DR: In this article, the authors introduce basic concepts and methodologies for the analysis of Siliciclastic Sediments, including Sandstones, Conglomerates and Breccias.
Journal ArticleDOI
Tectonics and history of the Andaman Sea region
TL;DR: The Andaman Sea is an active backarc basin lying above and behind the Sunda subduction zone where convergence between the overriding Southeast Asian plate and the subducting Australian plate is highly oblique.