Geochemistry of Cenozoic ash layers from the Kerguelen Plateau
Geochemical investigations were conducted on 10 discrete ash layers and 22 samples of dispersed ash accumulations from Sites 747, 749, and 751 of Ocean Drilling Program (ODP) Leg 120 to the Kerguelen Plateau in the southern Indian Ocean. The chemical data obtained from some 400 single-grain glass an...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.757631 2023-05-15T16:33:56+02:00 Geochemistry of Cenozoic ash layers from the Kerguelen Plateau Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg MEDIAN LATITUDE: -56.054225 * MEDIAN LONGITUDE: 77.084638 * SOUTH-BOUND LATITUDE: -58.717000 * WEST-BOUND LONGITUDE: 76.407500 * NORTH-BOUND LATITUDE: -54.811000 * EAST-BOUND LONGITUDE: 79.814800 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-04-19T23:30:00 1992-02-22 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.757631 https://doi.org/10.1594/PANGAEA.757631 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.757631 https://doi.org/10.1594/PANGAEA.757631 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Morche, Wolfgang; Hubberten, Hans-Wolfgang; Mackensen, Andreas; Keller, Jörg (1992): Geochemistry of Cenozoic ash layers from the Kerguelen Plateau (Leg 120): a first step toward a tephrostratigraphy of the Southern Indian Ocean. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 151-160, https://doi.org/10.2973/odp.proc.sr.120.163.1992 120-747A 120-747B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Dataset 1992 ftpangaea https://doi.org/10.1594/PANGAEA.757631 https://doi.org/10.2973/odp.proc.sr.120.163.1992 2023-01-20T07:32:03Z Geochemical investigations were conducted on 10 discrete ash layers and 22 samples of dispersed ash accumulations from Sites 747, 749, and 751 of Ocean Drilling Program (ODP) Leg 120 to the Kerguelen Plateau in the southern Indian Ocean. The chemical data obtained from some 400 single-grain glass analyses allow the characterization of two rock series. The first consists of transitional to alkali basalts; the second, mainly of trachytes with subordinated rhyolites, all reflecting the characteristic magmatological evolution of the Kerguelen Plateau as a hotspot-related volcanism. Chemical correlation with possible source areas indicates that the ashes were most probably erupted from the Kerguelen Islands. The investigated ash layers clearly reflect the Oligocene to Quaternary changes in the composition of the volcanic material recorded from the Kerguelen Islands. In addition to the Kerguelen Islands, Heard Island, Crozet Island, and other sources may have contributed to deposition of the tephras. Pleistocene tephras of "exotic" calc-alkaline composition are most probably derived from enhanced magmatic activity during that time span at the South Sandwich island arc. When using data obtained from tephras of the ODP Leg 119 Kerguelen sites, several eruptive periods can be correlated through the composition of the deposited ashes. Some of them are widely distributed over the Kerguelen Plateau and are seen as a first step toward a southern Indian Ocean tephrostratigraphy. Dataset Heard Island Kerguelen Islands PANGAEA - Data Publisher for Earth & Environmental Science Heard Island Indian Kerguelen Kerguelen Islands ENVELOPE(76.407500,79.814800,-54.811000,-58.717000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
120-747A 120-747B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
spellingShingle |
120-747A 120-747B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
topic_facet |
120-747A 120-747B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
description |
Geochemical investigations were conducted on 10 discrete ash layers and 22 samples of dispersed ash accumulations from Sites 747, 749, and 751 of Ocean Drilling Program (ODP) Leg 120 to the Kerguelen Plateau in the southern Indian Ocean. The chemical data obtained from some 400 single-grain glass analyses allow the characterization of two rock series. The first consists of transitional to alkali basalts; the second, mainly of trachytes with subordinated rhyolites, all reflecting the characteristic magmatological evolution of the Kerguelen Plateau as a hotspot-related volcanism. Chemical correlation with possible source areas indicates that the ashes were most probably erupted from the Kerguelen Islands. The investigated ash layers clearly reflect the Oligocene to Quaternary changes in the composition of the volcanic material recorded from the Kerguelen Islands. In addition to the Kerguelen Islands, Heard Island, Crozet Island, and other sources may have contributed to deposition of the tephras. Pleistocene tephras of "exotic" calc-alkaline composition are most probably derived from enhanced magmatic activity during that time span at the South Sandwich island arc. When using data obtained from tephras of the ODP Leg 119 Kerguelen sites, several eruptive periods can be correlated through the composition of the deposited ashes. Some of them are widely distributed over the Kerguelen Plateau and are seen as a first step toward a southern Indian Ocean tephrostratigraphy. |
format |
Dataset |
author |
Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg |
author_facet |
Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg |
author_sort |
Morche, Wolfgang |
title |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
title_short |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
title_full |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
title_fullStr |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
title_full_unstemmed |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau |
title_sort |
geochemistry of cenozoic ash layers from the kerguelen plateau |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.757631 https://doi.org/10.1594/PANGAEA.757631 |
op_coverage |
MEDIAN LATITUDE: -56.054225 * MEDIAN LONGITUDE: 77.084638 * SOUTH-BOUND LATITUDE: -58.717000 * WEST-BOUND LONGITUDE: 76.407500 * NORTH-BOUND LATITUDE: -54.811000 * EAST-BOUND LONGITUDE: 79.814800 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-04-19T23:30:00 |
long_lat |
ENVELOPE(76.407500,79.814800,-54.811000,-58.717000) |
geographic |
Heard Island Indian Kerguelen Kerguelen Islands |
geographic_facet |
Heard Island Indian Kerguelen Kerguelen Islands |
genre |
Heard Island Kerguelen Islands |
genre_facet |
Heard Island Kerguelen Islands |
op_source |
Supplement to: Morche, Wolfgang; Hubberten, Hans-Wolfgang; Mackensen, Andreas; Keller, Jörg (1992): Geochemistry of Cenozoic ash layers from the Kerguelen Plateau (Leg 120): a first step toward a tephrostratigraphy of the Southern Indian Ocean. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 151-160, https://doi.org/10.2973/odp.proc.sr.120.163.1992 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.757631 https://doi.org/10.1594/PANGAEA.757631 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.757631 https://doi.org/10.2973/odp.proc.sr.120.163.1992 |
_version_ |
1766023676971450368 |