Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation
Ninetyeast Ridge (NER) is a linear volcanic ridge in the Indian Ocean thought to have formed by hotspot volcanism on the northward?drifting Indian plate. Geological data from the ridge are sparse, so its tectonic evolution is poorly known. We studied satellite-derived gravity data, seismic reflectio...
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ftnio:oai:dsr.nio.org:2264/3723 2023-05-15T13:59:28+02:00 Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation Sager, W.W. Paul, C.F. Krishna, K.S. Pringle, M.S. Eisin, A.E. Frey, F.A. Rao, D.G. Levchenko, O.V. 2010 http://drs.nio.org/drs/handle/2264/3723 en eng American Geophysical Union An edited version of this paper was published by AGU. Copyright [2010] AGU. To view the published open abstract, go to http://dx.doi.org and enter the DOI. near-spreading ridge lateafloor spreading gravity data seismic reflection profiles Journal Article 2010 ftnio 2012-08-25T20:09:57Z Ninetyeast Ridge (NER) is a linear volcanic ridge in the Indian Ocean thought to have formed by hotspot volcanism on the northward?drifting Indian plate. Geological data from the ridge are sparse, so its tectonic evolution is poorly known. We studied satellite-derived gravity data, seismic reflection profiles, and multibeam bathymetry to examine NER structure. Gravity data show that the ridge displays a series of nearly E-W trending lineations with average spacing approx. 0.4 degrees (45 km). In seismic and bathymetry data, these lineations correlate with horsts and grabens that probably formed near the time of ridge emplacement. From their extensional nature and trends, we infer that these faulted structures formed near the spreading ridge that separated the Indian and Antarctic plates and their ubiquity implies the hotspot was never far from this spreading ridge Article in Journal/Newspaper Antarc* Antarctic National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Antarctic Indian Ner ENVELOPE(6.622,6.622,62.612,62.612) |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
near-spreading ridge lateafloor spreading gravity data seismic reflection profiles |
spellingShingle |
near-spreading ridge lateafloor spreading gravity data seismic reflection profiles Sager, W.W. Paul, C.F. Krishna, K.S. Pringle, M.S. Eisin, A.E. Frey, F.A. Rao, D.G. Levchenko, O.V. Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
topic_facet |
near-spreading ridge lateafloor spreading gravity data seismic reflection profiles |
description |
Ninetyeast Ridge (NER) is a linear volcanic ridge in the Indian Ocean thought to have formed by hotspot volcanism on the northward?drifting Indian plate. Geological data from the ridge are sparse, so its tectonic evolution is poorly known. We studied satellite-derived gravity data, seismic reflection profiles, and multibeam bathymetry to examine NER structure. Gravity data show that the ridge displays a series of nearly E-W trending lineations with average spacing approx. 0.4 degrees (45 km). In seismic and bathymetry data, these lineations correlate with horsts and grabens that probably formed near the time of ridge emplacement. From their extensional nature and trends, we infer that these faulted structures formed near the spreading ridge that separated the Indian and Antarctic plates and their ubiquity implies the hotspot was never far from this spreading ridge |
format |
Article in Journal/Newspaper |
author |
Sager, W.W. Paul, C.F. Krishna, K.S. Pringle, M.S. Eisin, A.E. Frey, F.A. Rao, D.G. Levchenko, O.V. |
author_facet |
Sager, W.W. Paul, C.F. Krishna, K.S. Pringle, M.S. Eisin, A.E. Frey, F.A. Rao, D.G. Levchenko, O.V. |
author_sort |
Sager, W.W. |
title |
Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
title_short |
Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
title_full |
Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
title_fullStr |
Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
title_full_unstemmed |
Large fault fabric of the Ninetyeast Ridge implies near-spreading ridge formation |
title_sort |
large fault fabric of the ninetyeast ridge implies near-spreading ridge formation |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://drs.nio.org/drs/handle/2264/3723 |
long_lat |
ENVELOPE(6.622,6.622,62.612,62.612) |
geographic |
Antarctic Indian Ner |
geographic_facet |
Antarctic Indian Ner |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_rights |
An edited version of this paper was published by AGU. Copyright [2010] AGU. To view the published open abstract, go to http://dx.doi.org and enter the DOI. |
_version_ |
1766268034060648448 |