Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources
Bransfield Strait, a narrow active rift with three submarine basins, separates the South Shetland Islands from northern Antarctic Peninsula. Volcanism in Bransfield Strait commenced prior to 0.75 Ma and continues, with recent subaerial eruptions at Deception, Bridgeman and Penguin islands, submarine...
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Cambridge University Press
2003
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Online Access: | http://nora.nerc.ac.uk/id/eprint/13380/ http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=139795 |
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ftnerc:oai:nora.nerc.ac.uk:13380 2023-05-15T13:45:11+02:00 Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources Fretzdorff, S. Smellie, J.L. 2003 http://nora.nerc.ac.uk/id/eprint/13380/ http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=139795 unknown Cambridge University Press Fretzdorff, S.; Smellie, J.L. 2003 Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources. Antarctic Science, 14 (4). 412-421. https://doi.org/10.1017/S0954102002000214 <https://doi.org/10.1017/S0954102002000214> Earth Sciences Publication - Article PeerReviewed 2003 ftnerc https://doi.org/10.1017/S0954102002000214 2023-02-04T19:28:34Z Bransfield Strait, a narrow active rift with three submarine basins, separates the South Shetland Islands from northern Antarctic Peninsula. Volcanism in Bransfield Strait commenced prior to 0.75 Ma and continues, with recent subaerial eruptions at Deception, Bridgeman and Penguin islands, submarine hydrothermal activity and numerous young basaltic seamounts located along the rift axis. Gravity cores were collected from five locations within the central Bransfield basin. Diatomaceous mud interbedded with terrigenous detritus and discrete ash layers up to 10 cm thick are the commonest sediment types in all the cores. The major element compositions of glass shards within the ash layers are, apart from the uppermost layer, compositionally similar to pyroclastic units preserved on Deception Island, a young (< 0.75 Ma) active stratovolcano. The uppermost ash layer cannot be closely matched compositionally to any known source in the Antarctic-Scotia Sea-southem South America region. Its presence indicates that a volcanic centre other than Deception Island contributed ash to the Bransfield basin. Based on the shallow stratigraphical position of the compositionally distinctive ash layer, only a few decimetres beneath the seafloor, its source volcano was probably active in historical times (< few hundred years). Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Deception Island Scotia Sea South Shetland Islands Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Bransfield Strait Bridgeman ENVELOPE(-56.733,-56.733,-62.067,-62.067) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Scotia Sea South Shetland Islands The Antarctic Antarctic Science 14 4 412 421 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Fretzdorff, S. Smellie, J.L. Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
topic_facet |
Earth Sciences |
description |
Bransfield Strait, a narrow active rift with three submarine basins, separates the South Shetland Islands from northern Antarctic Peninsula. Volcanism in Bransfield Strait commenced prior to 0.75 Ma and continues, with recent subaerial eruptions at Deception, Bridgeman and Penguin islands, submarine hydrothermal activity and numerous young basaltic seamounts located along the rift axis. Gravity cores were collected from five locations within the central Bransfield basin. Diatomaceous mud interbedded with terrigenous detritus and discrete ash layers up to 10 cm thick are the commonest sediment types in all the cores. The major element compositions of glass shards within the ash layers are, apart from the uppermost layer, compositionally similar to pyroclastic units preserved on Deception Island, a young (< 0.75 Ma) active stratovolcano. The uppermost ash layer cannot be closely matched compositionally to any known source in the Antarctic-Scotia Sea-southem South America region. Its presence indicates that a volcanic centre other than Deception Island contributed ash to the Bransfield basin. Based on the shallow stratigraphical position of the compositionally distinctive ash layer, only a few decimetres beneath the seafloor, its source volcano was probably active in historical times (< few hundred years). |
format |
Article in Journal/Newspaper |
author |
Fretzdorff, S. Smellie, J.L. |
author_facet |
Fretzdorff, S. Smellie, J.L. |
author_sort |
Fretzdorff, S. |
title |
Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
title_short |
Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
title_full |
Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
title_fullStr |
Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
title_full_unstemmed |
Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources |
title_sort |
electron microprobe characterization of ash layers in sediments from the central bransfield basin (antarctic peninsula): evidence for at least two volcanic sources |
publisher |
Cambridge University Press |
publishDate |
2003 |
url |
http://nora.nerc.ac.uk/id/eprint/13380/ http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=139795 |
long_lat |
ENVELOPE(-56.733,-56.733,-62.067,-62.067) ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Bridgeman Deception Island Scotia Sea South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Bridgeman Deception Island Scotia Sea South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Deception Island Scotia Sea South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Deception Island Scotia Sea South Shetland Islands |
op_relation |
Fretzdorff, S.; Smellie, J.L. 2003 Electron microprobe characterization of ash layers in sediments from the central Bransfield basin (Antarctic Peninsula): evidence for at least two volcanic sources. Antarctic Science, 14 (4). 412-421. https://doi.org/10.1017/S0954102002000214 <https://doi.org/10.1017/S0954102002000214> |
op_doi |
https://doi.org/10.1017/S0954102002000214 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
4 |
container_start_page |
412 |
op_container_end_page |
421 |
_version_ |
1766215463322255360 |