Internal structure of the 85°E ridge, Bay of Bengal: Evidence for multiphase volcanism

dc.contributor.author Ismaiel, M.
dc.contributor.author Krishna, K. S.
dc.contributor.author Srinivas, K.
dc.contributor.author Mishra, J.
dc.contributor.author Saha, D.
dc.date.accessioned 2022-03-26T23:51:29Z
dc.date.available 2022-03-26T23:51:29Z
dc.date.issued 2017-02-01
dc.description.abstract The 85°E Ridge, located in the Bay of Bengal of the northeastern Indian Ocean is an enigmatic geological feature as it possesses unusual geophysical signatures. The ridge's internal structure and mode of eruptions are unknown due to lack of deep seismic reflection and borehole data control. Here, we analyze 10 km of long-streamer seismic reflection data to unravel the ridge's internal structure, and thereby to enhance the understanding of how the ridge was originated and grew over a geologic time. Seismic facies analysis reveals the ridge structure consisting of volcanic vent and several stratigraphic units including packs of prograding clinoforms. The clinoform sequences are interpreted as volcanic successions, and led to the formation of lava-delta fronts. Interpreted features of lava-fed deltas and intervening erosional surfaces, and mass flows along ridge flanks suggest that the 85°E Ridge is a volcanic construct, and was built by both subaqueous and multiphase sub-marine volcanism during the Late Cretaceous (approximately from 85 to 80 Ma). At later time, from Oligocene-Miocene (∼23 Ma) onwards the ridge was buried under the thick sediments of the Bengal Fan system.
dc.identifier.citation Marine and Petroleum Geology. v.80
dc.identifier.issn 02648172
dc.identifier.uri 10.1016/j.marpetgeo.2016.11.020
dc.identifier.uri https://www.sciencedirect.com/science/article/abs/pii/S0264817216304135
dc.identifier.uri https://dspace.uohyd.ac.in/handle/1/2840
dc.subject 85°E ridge
dc.subject Aseismic ridge
dc.subject Bay of bengal
dc.subject Carbonate sequence
dc.subject Lava deltas
dc.subject Multiphase submarine volcanism
dc.subject Volcano-stratigraphy
dc.title Internal structure of the 85°E ridge, Bay of Bengal: Evidence for multiphase volcanism
dc.type Journal. Article
dspace.entity.type
Files
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Plain Text
Description: