Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ...
Drilling at site 207 (DSDP Leg 21), located on the broad summit of the Lord Howe Rise, bottomed in rhyolitic rocks. Sanidine concentrates from four samples of the rhyolite were dated by the 40Ar/39Ar total fusion method and conventional K-Ar method, and yielded concordant ages of 93.7 +/- 1.1 my, eq...
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ftdatacite:10.1594/pangaea.708429 2024-09-15T17:47:19+00:00 Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... McDougall, Ian van der Lingen, Gerrit J 1974 application/zip https://dx.doi.org/10.1594/pangaea.708429 https://doi.pangaea.de/10.1594/PANGAEA.708429 en eng PANGAEA https://dx.doi.org/10.1016/0012-821x(74)90044-2 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Drilling/drill rig Leg21 Glomar Challenger Deep Sea Drilling Project DSDP article Collection Supplementary Publication Series of Datasets 1974 ftdatacite https://doi.org/10.1594/pangaea.70842910.1016/0012-821x(74)90044-2 2024-08-01T10:55:41Z Drilling at site 207 (DSDP Leg 21), located on the broad summit of the Lord Howe Rise, bottomed in rhyolitic rocks. Sanidine concentrates from four samples of the rhyolite were dated by the 40Ar/39Ar total fusion method and conventional K-Ar method, and yielded concordant ages of 93.7 +/- 1.1 my, equivalent to the early part of the Upper Cretaceous. At this time the Lord Howe Rise, which has continental-type structure, is thought to have been emergent and adjacent to the eastern margin of the Australian-antarctic continent. Subsequent to 94 my ago and prior to deposition of Maastrichtian (70-65 myBP) marine sediments on top of the rhyolitic basement of the Lord Howe Rise, rifting occurred and the formation of the Tasman Basin began by sea-floor spreading with rotation of the Rise away from the margin of Australia. Subsidence of the Rise continued until Early Eocene (about 50 myBP), probably marking the end of sea-floor spreading in the Tasman Basin. These large scale movements relate to the breakup of this ... : Supplement to: McDougall, Ian; van der Lingen, Gerrit J (1974): Age of the Rhyolites of the Lord Howe Rise and the evolution of the Southwest Pacific Ocean. Earth and Planetary Science Letters, 21(2), 117-126 ... Article in Journal/Newspaper Antarc* Antarctic DataCite |
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Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg21 Glomar Challenger Deep Sea Drilling Project DSDP |
spellingShingle |
Drilling/drill rig Leg21 Glomar Challenger Deep Sea Drilling Project DSDP McDougall, Ian van der Lingen, Gerrit J Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
topic_facet |
Drilling/drill rig Leg21 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
Drilling at site 207 (DSDP Leg 21), located on the broad summit of the Lord Howe Rise, bottomed in rhyolitic rocks. Sanidine concentrates from four samples of the rhyolite were dated by the 40Ar/39Ar total fusion method and conventional K-Ar method, and yielded concordant ages of 93.7 +/- 1.1 my, equivalent to the early part of the Upper Cretaceous. At this time the Lord Howe Rise, which has continental-type structure, is thought to have been emergent and adjacent to the eastern margin of the Australian-antarctic continent. Subsequent to 94 my ago and prior to deposition of Maastrichtian (70-65 myBP) marine sediments on top of the rhyolitic basement of the Lord Howe Rise, rifting occurred and the formation of the Tasman Basin began by sea-floor spreading with rotation of the Rise away from the margin of Australia. Subsidence of the Rise continued until Early Eocene (about 50 myBP), probably marking the end of sea-floor spreading in the Tasman Basin. These large scale movements relate to the breakup of this ... : Supplement to: McDougall, Ian; van der Lingen, Gerrit J (1974): Age of the Rhyolites of the Lord Howe Rise and the evolution of the Southwest Pacific Ocean. Earth and Planetary Science Letters, 21(2), 117-126 ... |
format |
Article in Journal/Newspaper |
author |
McDougall, Ian van der Lingen, Gerrit J |
author_facet |
McDougall, Ian van der Lingen, Gerrit J |
author_sort |
McDougall, Ian |
title |
Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
title_short |
Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
title_full |
Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
title_fullStr |
Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
title_full_unstemmed |
Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean ... |
title_sort |
age determination of the rhyolites of the lord howe rise in the southwest pacific ocean ... |
publisher |
PANGAEA |
publishDate |
1974 |
url |
https://dx.doi.org/10.1594/pangaea.708429 https://doi.pangaea.de/10.1594/PANGAEA.708429 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1016/0012-821x(74)90044-2 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.70842910.1016/0012-821x(74)90044-2 |
_version_ |
1810496452176117760 |