Magnetic anomalies over the Andaman Islands and their geological significance

Rao, Subba and Radhakrishna, M. and Haripriya, K. and Rao, Someswara and Chandrasekharam, D. (2016) Magnetic anomalies over the Andaman Islands and their geological significance. Journal of Earth System Science, 125 (2). pp. 359-368. ISSN 0253-4126

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Abstract

The Andaman Islands form part of the outer-arc accretionary sedimentary complex belonging to the Andaman–Sumatra active subduction zone. The islands are characterized by thick cover of Neogene sediments along with exposed ophiolite rocks at few places. A regional magnetic survey was carried out for the first time over the Andaman Islands with a view to understand the correlation of anomaly signatures with surface geology of the islands. The residual total field magnetic anomaly maps have revealed distinct magnetic anomalies having intermediate to high amplitude magnetic signatures and correlate with the areas over/close to the exposed ophiolite rocks along the east coast of north, middle and the south Andaman Islands. The 2D modelling of magnetic anomalies along selected E–W profiles across the islands indicate that the ophiolite bodies extend to a depth of about 5–8 km and spatially correlate with the mapped fault/thrust zones.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences (1 Jul 2013 - 5 Sep 2019)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences (1 Jul 2013 - 5 Sep 2019)
Date Deposited: 03 Sep 2019 23:43
Last Modified: 10 Sep 2019 03:07
Uncontrolled Keywords: magnetic survey, ophiolites, magnetic anomalies, Andaman Islands, North-East Indian Ocean
Fields of Research (2008): 04 Earth Sciences > 0405 Oceanography > 040599 Oceanography not elsewhere classified
Identification Number or DOI: https://doi.org/10.1007/s12040-016-0660-7
URI: http://eprints.usq.edu.au/id/eprint/35984

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