40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)

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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Bibliographic Details
Main Author: Duncan, Robert A
Format: Dataset
Language:English
Published: PANGAEA 1991
Subjects:
121-756D
121-757C
121-758A
Age
dated
dated standard deviation
Argon-39
Argon-40/Argon-36
standard deviation
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Event label
Indian Ocean
Joides Resolution
Leg121
Ocean Drilling Program
ODP
Parameter
Sample amount
Sample code/label
South Indian Ridge
South Indian Ocean
Kerguelen Islands
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.761131
https://doi.org/10.1594/PANGAEA.761131
id ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.761131
record_format openpolar
spelling ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.761131 2024-09-15T18:16:28+00:00 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1) Duncan, Robert A MEDIAN LATITUDE: -12.997933 * MEDIAN LONGITUDE: 88.712933 * SOUTH-BOUND LATITUDE: -27.355000 * WEST-BOUND LONGITUDE: 87.597400 * NORTH-BOUND LATITUDE: 5.384200 * EAST-BOUND LONGITUDE: 90.361200 * DATE/TIME START: 1988-05-27T18:45:00 * DATE/TIME END: 1988-06-24T13:30:00 * MINIMUM ELEVATION: -2935.0 m * MAXIMUM ELEVATION: -1524.0 m 1991 text/tab-separated-values, 65 data points https://doi.pangaea.de/10.1594/PANGAEA.761131 https://doi.org/10.1594/PANGAEA.761131 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.761131 https://doi.org/10.1594/PANGAEA.761131 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess 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, https://doi.org/10.2973/odp.proc.sr.121.162.1991 121-756D 121-757C 121-758A Age dated dated standard deviation Argon-39 Argon-40/Argon-36 standard deviation DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Indian Ocean Joides Resolution Leg121 Ocean Drilling Program ODP Parameter Sample amount Sample code/label South Indian Ridge South Indian Ocean dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.76113110.2973/odp.proc.sr.121.162.1991 2024-07-24T02:31:31Z 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 PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(87.597400,90.361200,5.384200,-27.355000)
institution Open Polar
collection PANGAEA - Data Publisher for Earth & Environmental Science
op_collection_id ftpangaea
language English
topic 121-756D
121-757C
121-758A
Age
dated
dated standard deviation
Argon-39
Argon-40/Argon-36
standard deviation
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Event label
Indian Ocean
Joides Resolution
Leg121
Ocean Drilling Program
ODP
Parameter
Sample amount
Sample code/label
South Indian Ridge
South Indian Ocean
spellingShingle 121-756D
121-757C
121-758A
Age
dated
dated standard deviation
Argon-39
Argon-40/Argon-36
standard deviation
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Event label
Indian Ocean
Joides Resolution
Leg121
Ocean Drilling Program
ODP
Parameter
Sample amount
Sample code/label
South Indian Ridge
South Indian Ocean
Duncan, Robert A
40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)
topic_facet 121-756D
121-757C
121-758A
Age
dated
dated standard deviation
Argon-39
Argon-40/Argon-36
standard deviation
DRILL
Drilling/drill rig
DSDP/ODP/IODP sample designation
Event label
Indian Ocean
Joides Resolution
Leg121
Ocean Drilling Program
ODP
Parameter
Sample amount
Sample code/label
South Indian Ridge
South Indian Ocean
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)
title_short 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)
title_full 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)
title_fullStr 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)
title_full_unstemmed 40Ar-39Ar plateau and isochron ages from the Ninetyeast and Broken Ridges (Table 1)
title_sort 40ar-39ar plateau and isochron ages from the ninetyeast and broken ridges (table 1)
publisher PANGAEA
publishDate 1991
url https://doi.pangaea.de/10.1594/PANGAEA.761131
https://doi.org/10.1594/PANGAEA.761131
op_coverage MEDIAN LATITUDE: -12.997933 * MEDIAN LONGITUDE: 88.712933 * SOUTH-BOUND LATITUDE: -27.355000 * WEST-BOUND LONGITUDE: 87.597400 * NORTH-BOUND LATITUDE: 5.384200 * EAST-BOUND LONGITUDE: 90.361200 * DATE/TIME START: 1988-05-27T18:45:00 * DATE/TIME END: 1988-06-24T13:30:00 * MINIMUM ELEVATION: -2935.0 m * MAXIMUM ELEVATION: -1524.0 m
long_lat ENVELOPE(87.597400,90.361200,5.384200,-27.355000)
genre Kerguelen Islands
genre_facet Kerguelen Islands
op_source 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, https://doi.org/10.2973/odp.proc.sr.121.162.1991
op_relation https://doi.pangaea.de/10.1594/PANGAEA.761131
https://doi.org/10.1594/PANGAEA.761131
op_rights CC-BY-3.0: Creative Commons Attribution 3.0 Unported
Access constraints: unrestricted
info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1594/PANGAEA.76113110.2973/odp.proc.sr.121.162.1991
_version_ 1810454463831343104

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