Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis
We analyze available heat flow data from the flanks of the Southeast Indian Ridge adjacent to or within the Australian-Antarctic Discordance (AAD), an area with patchy sediment cover and highly fractured seafloor as dissected by ridge- and fracture-parallel faults. The data set includes 23 new data...
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American Geophysical Union
2008
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8PG1RH8 2023-05-15T13:41:09+02:00 Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis Géli, L. Lee, T. C. Cochran, James R. Francheteau, J. Abbott, Dallas Helen Labails, C. Appriou, D. 2008 https://doi.org/10.7916/D8PG1RH8 English eng American Geophysical Union https://doi.org/10.7916/D8PG1RH8 Ocean temperature--Data processing Ocean circulation Heat--Transmission Mid-ocean ridges Geophysics Hydrology Oceanography Articles 2008 ftcolumbiauniv https://doi.org/10.7916/D8PG1RH8 2019-04-04T08:14:03Z We analyze available heat flow data from the flanks of the Southeast Indian Ridge adjacent to or within the Australian-Antarctic Discordance (AAD), an area with patchy sediment cover and highly fractured seafloor as dissected by ridge- and fracture-parallel faults. The data set includes 23 new data points collected along a 14-Ma old isochron and 19 existing measurements from the 20- to 24-Ma old crust. Most sites of measurements exhibit low heat flux (from 2 to 50 mW m−2) with near-linear temperature-depth profiles except at a few sites, where recent bottom water temperature change may have caused nonlinearity toward the sediment surface. Because the igneous basement is expected to outcrop a short distance away from any measurement site, we hypothesize that horizontally channelized water circulation within the uppermost crust is the primary process for the widespread low heat flow values. The process may be further influenced by vertical fluid flow along numerous fault zones that crisscross the AAD seafloor. Systematic measurements along and across the fault zones of interest as well as seismic profiling for sediment distribution are required to confirm this possible, suspected effect. Article in Journal/Newspaper Antarc* Antarctic Columbia University: Academic Commons Antarctic Indian Southeast Indian Ridge ENVELOPE(110.000,110.000,-50.000,-50.000) Australian-Antarctic Discordance ENVELOPE(124.000,124.000,-49.000,-49.000) |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Ocean temperature--Data processing Ocean circulation Heat--Transmission Mid-ocean ridges Geophysics Hydrology Oceanography |
spellingShingle |
Ocean temperature--Data processing Ocean circulation Heat--Transmission Mid-ocean ridges Geophysics Hydrology Oceanography Géli, L. Lee, T. C. Cochran, James R. Francheteau, J. Abbott, Dallas Helen Labails, C. Appriou, D. Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
topic_facet |
Ocean temperature--Data processing Ocean circulation Heat--Transmission Mid-ocean ridges Geophysics Hydrology Oceanography |
description |
We analyze available heat flow data from the flanks of the Southeast Indian Ridge adjacent to or within the Australian-Antarctic Discordance (AAD), an area with patchy sediment cover and highly fractured seafloor as dissected by ridge- and fracture-parallel faults. The data set includes 23 new data points collected along a 14-Ma old isochron and 19 existing measurements from the 20- to 24-Ma old crust. Most sites of measurements exhibit low heat flux (from 2 to 50 mW m−2) with near-linear temperature-depth profiles except at a few sites, where recent bottom water temperature change may have caused nonlinearity toward the sediment surface. Because the igneous basement is expected to outcrop a short distance away from any measurement site, we hypothesize that horizontally channelized water circulation within the uppermost crust is the primary process for the widespread low heat flow values. The process may be further influenced by vertical fluid flow along numerous fault zones that crisscross the AAD seafloor. Systematic measurements along and across the fault zones of interest as well as seismic profiling for sediment distribution are required to confirm this possible, suspected effect. |
format |
Article in Journal/Newspaper |
author |
Géli, L. Lee, T. C. Cochran, James R. Francheteau, J. Abbott, Dallas Helen Labails, C. Appriou, D. |
author_facet |
Géli, L. Lee, T. C. Cochran, James R. Francheteau, J. Abbott, Dallas Helen Labails, C. Appriou, D. |
author_sort |
Géli, L. |
title |
Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
title_short |
Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
title_full |
Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
title_fullStr |
Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
title_full_unstemmed |
Heat flow from the Southeast Indian Ridge flanks between 80°E and 140°E: Data review and analysis |
title_sort |
heat flow from the southeast indian ridge flanks between 80°e and 140°e: data review and analysis |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://doi.org/10.7916/D8PG1RH8 |
long_lat |
ENVELOPE(110.000,110.000,-50.000,-50.000) ENVELOPE(124.000,124.000,-49.000,-49.000) |
geographic |
Antarctic Indian Southeast Indian Ridge Australian-Antarctic Discordance |
geographic_facet |
Antarctic Indian Southeast Indian Ridge Australian-Antarctic Discordance |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://doi.org/10.7916/D8PG1RH8 |
op_doi |
https://doi.org/10.7916/D8PG1RH8 |
_version_ |
1766146120338112512 |