Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239
The role of hotter than ambient plume mantle in the formation of a rifted volcanic margin in the northern Arabian Sea is investigated using subsidence analysis of a drill site located on the seismically defined Somnath volcanic ridge. The ridge has experienced >4 km of subsidence since 65 Ma and...
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ftdatacite:10.1594/pangaea.717633 2023-05-15T17:22:31+02:00 Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 Calves, Gerome Clift, Peter D Inam, Asif 2008 application/zip https://dx.doi.org/10.1594/pangaea.717633 https://doi.pangaea.de/10.1594/PANGAEA.717633 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.epsl.2008.04.042 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg24 Glomar Challenger Deep Sea Drilling Project DSDP Collection article Supplementary Collection of Datasets 2008 ftdatacite https://doi.org/10.1594/pangaea.717633 https://doi.org/10.1016/j.epsl.2008.04.042 2021-11-05T12:55:41Z The role of hotter than ambient plume mantle in the formation of a rifted volcanic margin in the northern Arabian Sea is investigated using subsidence analysis of a drill site located on the seismically defined Somnath volcanic ridge. The ridge has experienced >4 km of subsidence since 65 Ma and lies within oceanic lithosphere. We estimate crustal thickness to be 9.5-11.5 km. Curiously <400 m of the thermal subsidence occurred prior to 37 Ma, when subsidence rates would normally be at a maximum. We reject the hypothesis that this was caused by increasing plume dynamic support after continental break-up because the size of the thermal anomalies required are unrealistic (>600°C), especially considering the rapid northward drift of India relative to the Deccan-Réunion hotspot. We suggest that this reflects very slow lithospheric growth, possibly caused by vigorous asthenospheric convection lasting >28 m.y., and induced by the steep continent-ocean boundary. Post-rift slow subsidence is also recognized on volcanic margins in the NE Atlantic and SE Newfoundland and cannot be used as a unique indicator of plume mantle involvement in continental break-up. Article in Journal/Newspaper Newfoundland DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg24 Glomar Challenger Deep Sea Drilling Project DSDP |
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Drilling/drill rig Leg24 Glomar Challenger Deep Sea Drilling Project DSDP Calves, Gerome Clift, Peter D Inam, Asif Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
topic_facet |
Drilling/drill rig Leg24 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
The role of hotter than ambient plume mantle in the formation of a rifted volcanic margin in the northern Arabian Sea is investigated using subsidence analysis of a drill site located on the seismically defined Somnath volcanic ridge. The ridge has experienced >4 km of subsidence since 65 Ma and lies within oceanic lithosphere. We estimate crustal thickness to be 9.5-11.5 km. Curiously <400 m of the thermal subsidence occurred prior to 37 Ma, when subsidence rates would normally be at a maximum. We reject the hypothesis that this was caused by increasing plume dynamic support after continental break-up because the size of the thermal anomalies required are unrealistic (>600°C), especially considering the rapid northward drift of India relative to the Deccan-Réunion hotspot. We suggest that this reflects very slow lithospheric growth, possibly caused by vigorous asthenospheric convection lasting >28 m.y., and induced by the steep continent-ocean boundary. Post-rift slow subsidence is also recognized on volcanic margins in the NE Atlantic and SE Newfoundland and cannot be used as a unique indicator of plume mantle involvement in continental break-up. |
format |
Article in Journal/Newspaper |
author |
Calves, Gerome Clift, Peter D Inam, Asif |
author_facet |
Calves, Gerome Clift, Peter D Inam, Asif |
author_sort |
Calves, Gerome |
title |
Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
title_short |
Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
title_full |
Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
title_fullStr |
Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
title_full_unstemmed |
Lithology of sediments from the Arabian Sea, supplement to: Calves, Gerome; Clift, Peter D; Inam, Asif (2008): Anomalous subsidence on the rifted volcanic margin of Pakistan: No influence from Deccan plume. Earth and Planetary Science Letters, 272(1-2), 231-239 |
title_sort |
lithology of sediments from the arabian sea, supplement to: calves, gerome; clift, peter d; inam, asif (2008): anomalous subsidence on the rifted volcanic margin of pakistan: no influence from deccan plume. earth and planetary science letters, 272(1-2), 231-239 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2008 |
url |
https://dx.doi.org/10.1594/pangaea.717633 https://doi.pangaea.de/10.1594/PANGAEA.717633 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://dx.doi.org/10.1016/j.epsl.2008.04.042 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.717633 https://doi.org/10.1016/j.epsl.2008.04.042 |
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1766109227211816960 |