40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517
Concordant plateau and isochron ages are obtained from 40Ar-39Ar incremental heating experiments on volcanic rocks recovered by drilling at three Leg 121 sites along the Ninetyeast Ridge and two dredge locations on the southern scarp of the Broken Ridge, eastern Indian Ocean. The new data confirm a...
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PANGAEA - Data Publisher for Earth & Environmental Science
1991
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Online Access: | https://dx.doi.org/10.1594/pangaea.761131 https://doi.pangaea.de/10.1594/PANGAEA.761131 |
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ftdatacite:10.1594/pangaea.761131 2023-05-15T17:02:06+02:00 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 Duncan, Robert A 1991 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.761131 https://doi.pangaea.de/10.1594/PANGAEA.761131 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.121.162.1991 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Sample code/label Age, dated Age, dated standard deviation Argon-39 Sample amount Parameter Argon-40/Argon-36 Argon-40/Argon-36, standard deviation Drilling/drill rig DSDP/ODP/IODP sample designation Leg121 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 1991 ftdatacite https://doi.org/10.1594/pangaea.761131 https://doi.org/10.2973/odp.proc.sr.121.162.1991 2022-02-08T16:24:46Z Concordant plateau and isochron ages are obtained from 40Ar-39Ar incremental heating experiments on volcanic rocks recovered by drilling at three Leg 121 sites along the Ninetyeast Ridge and two dredge locations on the southern scarp of the Broken Ridge, eastern Indian Ocean. The new data confirm a northerly increase in the age of volcanism along the Ninetyeast Ridge, from 38 to 82 Ma; this lineament links current hotspot volcanism near the Kerguelen islands with the Rajmahal flood basalt eruptions at M0 time (117 ± 1 Ma). The Broken Ridge was formed over the same hotspot at 88-89 Ma, but later experienced rift-related volcanism in Paleocene time (63 Ma). The geometry and distribution of ages along these prominent volcanic ridges and the Mascarene-Chagos-Laccadive-Maldive ridge system in the western Indian Ocean are most compatible with plate motions over fixed hotspots near Kerguelen and Reunion islands, respectively. Dataset Kerguelen Islands DataCite Metadata Store (German National Library of Science and Technology) Broken Ridge ENVELOPE(-92.318,-92.318,79.552,79.552) Indian Kerguelen Kerguelen Islands |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Sample code/label Age, dated Age, dated standard deviation Argon-39 Sample amount Parameter Argon-40/Argon-36 Argon-40/Argon-36, standard deviation Drilling/drill rig DSDP/ODP/IODP sample designation Leg121 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Event label Sample code/label Age, dated Age, dated standard deviation Argon-39 Sample amount Parameter Argon-40/Argon-36 Argon-40/Argon-36, standard deviation Drilling/drill rig DSDP/ODP/IODP sample designation Leg121 Joides Resolution Ocean Drilling Program ODP Duncan, Robert A 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
topic_facet |
Event label Sample code/label Age, dated Age, dated standard deviation Argon-39 Sample amount Parameter Argon-40/Argon-36 Argon-40/Argon-36, standard deviation Drilling/drill rig DSDP/ODP/IODP sample designation Leg121 Joides Resolution Ocean Drilling Program ODP |
description |
Concordant plateau and isochron ages are obtained from 40Ar-39Ar incremental heating experiments on volcanic rocks recovered by drilling at three Leg 121 sites along the Ninetyeast Ridge and two dredge locations on the southern scarp of the Broken Ridge, eastern Indian Ocean. The new data confirm a northerly increase in the age of volcanism along the Ninetyeast Ridge, from 38 to 82 Ma; this lineament links current hotspot volcanism near the Kerguelen islands with the Rajmahal flood basalt eruptions at M0 time (117 ± 1 Ma). The Broken Ridge was formed over the same hotspot at 88-89 Ma, but later experienced rift-related volcanism in Paleocene time (63 Ma). The geometry and distribution of ages along these prominent volcanic ridges and the Mascarene-Chagos-Laccadive-Maldive ridge system in the western Indian Ocean are most compatible with plate motions over fixed hotspots near Kerguelen and Reunion islands, respectively. |
format |
Dataset |
author |
Duncan, Robert A |
author_facet |
Duncan, Robert A |
author_sort |
Duncan, Robert A |
title |
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
title_short |
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
title_full |
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
title_fullStr |
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
title_full_unstemmed |
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1), supplement to: Duncan, Robert A (1991): Age distribution of volcanism along aseismic ridges in the eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 507-517 |
title_sort |
40ar-39ar plateau and isochron ages from the ninetyeast and broken ridges (table 1), supplement to: duncan, robert a (1991): age distribution of volcanism along aseismic ridges in the eastern indian ocean. in: weissel, j; peirce, j; taylor, e; et al. (eds.), proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 121, 507-517 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1991 |
url |
https://dx.doi.org/10.1594/pangaea.761131 https://doi.pangaea.de/10.1594/PANGAEA.761131 |
long_lat |
ENVELOPE(-92.318,-92.318,79.552,79.552) |
geographic |
Broken Ridge Indian Kerguelen Kerguelen Islands |
geographic_facet |
Broken Ridge Indian Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands |
genre_facet |
Kerguelen Islands |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.121.162.1991 |
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.761131 https://doi.org/10.2973/odp.proc.sr.121.162.1991 |
_version_ |
1766055349705506816 |