Geochemical investigations of volcanic ash layers from ODP Leg 119
Geochemical investigations were carried out on 19 discrete ash layers and on 42 dispersed ash accumulations in Oligocene to Pleistocene sediments from Sites 736, 737, 745, and 746 of ODP Leg 119 (Kerguelen Plateau in the southern Indian Ocean). The chemical data obtained from more than 500 single-gr...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758165 2023-05-15T13:42:10+02:00 Geochemical investigations of volcanic ash layers from ODP Leg 119 Morche, Wolfgang Hubberten, Hans-Wolfgang Ehrmann, Werner Keller, Jörg MEDIAN LATITUDE: -54.284165 * MEDIAN LONGITUDE: 78.486597 * SOUTH-BOUND LATITUDE: -59.595000 * WEST-BOUND LONGITUDE: 71.661500 * NORTH-BOUND LATITUDE: -49.403000 * EAST-BOUND LONGITUDE: 85.868200 * DATE/TIME START: 1987-12-26T02:30:00 * DATE/TIME END: 1988-02-12T18:00:00 1991-03-10 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.758165 https://doi.org/10.1594/PANGAEA.758165 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758165 https://doi.org/10.1594/PANGAEA.758165 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; Ehrmann, Werner; Keller, Jörg (1991): Geochemical investigations of volcanic ash layers from Leg 119, Kerguelen Plateau. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 323-344, https://doi.org/10.2973/odp.proc.sr.119.124.1991 119-736A 119-737A 119-737B 119-745B 119-746A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.758165 https://doi.org/10.2973/odp.proc.sr.119.124.1991 2023-01-20T07:32:05Z Geochemical investigations were carried out on 19 discrete ash layers and on 42 dispersed ash accumulations in Oligocene to Pleistocene sediments from Sites 736, 737, 745, and 746 of ODP Leg 119 (Kerguelen Plateau in the southern Indian Ocean). The chemical data obtained from more than 500 single-grain glass analyses allow the characterization of two dominant petrographic rock series. The first consists of transitional- to alkali-basalts, the second mainly of trachytes with subordinated alkali-rhyolites and rhyolites. Chemical correlation with possible source areas indicates that the tephra layers from the northern Kerguelen Plateau Sites 736 and 737 were probably erupted from the nearby Kerguelen Islands. The investigated ash layers clearly reflect the Oligocene to recent changes in the composition of the volcanic material recorded from the Kerguelen Islands. The dispersed ashes from Sites 745 and 746 in the Australian-Antarctic Basin display almost the same range in chemical compositions as those from the north. Heard Island and other sources may have contributed to their formation, in addition to the Kerguelen Islands. Dispersed ash of calc-alkaline composition is most probably derived from the South Sandwich island arc, indicating sea-ice rafting as an important mechanism of transport. Dataset Antarc* Antarctic Heard Island Kerguelen Islands Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Kerguelen Heard Island Kerguelen Islands Indian Australian Antarctic Basin ENVELOPE(120.000,120.000,-60.000,-60.000) Australian-Antarctic Basin ENVELOPE(134.115,134.115,-58.800,-58.800) ENVELOPE(71.661500,85.868200,-49.403000,-59.595000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
119-736A 119-737A 119-737B 119-745B 119-746A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
spellingShingle |
119-736A 119-737A 119-737B 119-745B 119-746A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Morche, Wolfgang Hubberten, Hans-Wolfgang Ehrmann, Werner Keller, Jörg Geochemical investigations of volcanic ash layers from ODP Leg 119 |
topic_facet |
119-736A 119-737A 119-737B 119-745B 119-746A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
description |
Geochemical investigations were carried out on 19 discrete ash layers and on 42 dispersed ash accumulations in Oligocene to Pleistocene sediments from Sites 736, 737, 745, and 746 of ODP Leg 119 (Kerguelen Plateau in the southern Indian Ocean). The chemical data obtained from more than 500 single-grain glass analyses allow the characterization of two dominant petrographic rock series. The first consists of transitional- to alkali-basalts, the second mainly of trachytes with subordinated alkali-rhyolites and rhyolites. Chemical correlation with possible source areas indicates that the tephra layers from the northern Kerguelen Plateau Sites 736 and 737 were probably erupted from the nearby Kerguelen Islands. The investigated ash layers clearly reflect the Oligocene to recent changes in the composition of the volcanic material recorded from the Kerguelen Islands. The dispersed ashes from Sites 745 and 746 in the Australian-Antarctic Basin display almost the same range in chemical compositions as those from the north. Heard Island and other sources may have contributed to their formation, in addition to the Kerguelen Islands. Dispersed ash of calc-alkaline composition is most probably derived from the South Sandwich island arc, indicating sea-ice rafting as an important mechanism of transport. |
format |
Dataset |
author |
Morche, Wolfgang Hubberten, Hans-Wolfgang Ehrmann, Werner Keller, Jörg |
author_facet |
Morche, Wolfgang Hubberten, Hans-Wolfgang Ehrmann, Werner Keller, Jörg |
author_sort |
Morche, Wolfgang |
title |
Geochemical investigations of volcanic ash layers from ODP Leg 119 |
title_short |
Geochemical investigations of volcanic ash layers from ODP Leg 119 |
title_full |
Geochemical investigations of volcanic ash layers from ODP Leg 119 |
title_fullStr |
Geochemical investigations of volcanic ash layers from ODP Leg 119 |
title_full_unstemmed |
Geochemical investigations of volcanic ash layers from ODP Leg 119 |
title_sort |
geochemical investigations of volcanic ash layers from odp leg 119 |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758165 https://doi.org/10.1594/PANGAEA.758165 |
op_coverage |
MEDIAN LATITUDE: -54.284165 * MEDIAN LONGITUDE: 78.486597 * SOUTH-BOUND LATITUDE: -59.595000 * WEST-BOUND LONGITUDE: 71.661500 * NORTH-BOUND LATITUDE: -49.403000 * EAST-BOUND LONGITUDE: 85.868200 * DATE/TIME START: 1987-12-26T02:30:00 * DATE/TIME END: 1988-02-12T18:00:00 |
long_lat |
ENVELOPE(120.000,120.000,-60.000,-60.000) ENVELOPE(134.115,134.115,-58.800,-58.800) ENVELOPE(71.661500,85.868200,-49.403000,-59.595000) |
geographic |
Antarctic Kerguelen Heard Island Kerguelen Islands Indian Australian Antarctic Basin Australian-Antarctic Basin |
geographic_facet |
Antarctic Kerguelen Heard Island Kerguelen Islands Indian Australian Antarctic Basin Australian-Antarctic Basin |
genre |
Antarc* Antarctic Heard Island Kerguelen Islands Sea ice |
genre_facet |
Antarc* Antarctic Heard Island Kerguelen Islands Sea ice |
op_source |
Supplement to: Morche, Wolfgang; Hubberten, Hans-Wolfgang; Ehrmann, Werner; Keller, Jörg (1991): Geochemical investigations of volcanic ash layers from Leg 119, Kerguelen Plateau. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 323-344, https://doi.org/10.2973/odp.proc.sr.119.124.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758165 https://doi.org/10.1594/PANGAEA.758165 |
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.758165 https://doi.org/10.2973/odp.proc.sr.119.124.1991 |
_version_ |
1766164005109366784 |