Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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
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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1992
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ftdatacite:10.1594/pangaea.757631 2023-05-15T16:33:56+02:00 Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg 1992 application/zip https://dx.doi.org/10.1594/pangaea.757631 https://doi.pangaea.de/10.1594/PANGAEA.757631 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.120.163.1992 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg120 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 1992 ftdatacite https://doi.org/10.1594/pangaea.757631 https://doi.org/10.2973/odp.proc.sr.120.163.1992 2022-02-08T16:02:21Z 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. Article in Journal/Newspaper Heard Island Kerguelen Islands DataCite Metadata Store (German National Library of Science and Technology) Andreas ENVELOPE(-60.729,-60.729,-64.008,-64.008) Heard Island Indian Keller ENVELOPE(-58.406,-58.406,-62.073,-62.073) Kerguelen Kerguelen Islands |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg120 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Leg120 Joides Resolution Ocean Drilling Program ODP Morche, Wolfgang Hubberten, Hans-Wolfgang Mackensen, Andreas Keller, Jörg Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 |
topic_facet |
Drilling/drill rig Leg120 Joides Resolution Ocean Drilling Program ODP |
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 |
Article in Journal/Newspaper |
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, 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 |
title_short |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 |
title_full |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 |
title_fullStr |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 |
title_full_unstemmed |
Geochemistry of Cenozoic ash layers from the Kerguelen Plateau, 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 |
title_sort |
geochemistry of cenozoic ash layers from the kerguelen plateau, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1992 |
url |
https://dx.doi.org/10.1594/pangaea.757631 https://doi.pangaea.de/10.1594/PANGAEA.757631 |
long_lat |
ENVELOPE(-60.729,-60.729,-64.008,-64.008) ENVELOPE(-58.406,-58.406,-62.073,-62.073) |
geographic |
Andreas Heard Island Indian Keller Kerguelen Kerguelen Islands |
geographic_facet |
Andreas Heard Island Indian Keller Kerguelen Kerguelen Islands |
genre |
Heard Island Kerguelen Islands |
genre_facet |
Heard Island Kerguelen Islands |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.120.163.1992 |
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.757631 https://doi.org/10.2973/odp.proc.sr.120.163.1992 |
_version_ |
1766023678458331136 |