Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366
Numerous fresh ash layers comprise about 0.3% by volume of Neogene to Holocene sediments drilled at Leg 104 Sites 642 and 643 (Vøring Plateau, North Atlantic). Median grain sizes of the ashes are about 100 /µm and maximum grain sizes range up to 1200 µm. Rhyolitic pumice shards dominate, with minor...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
1989
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.736965 https://doi.pangaea.de/10.1594/PANGAEA.736965 |
id |
ftdatacite:10.1594/pangaea.736965 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.736965 2023-05-15T16:57:02+02:00 Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 Bitschene, Peter Rene Schmincke, Hans-Ulrich Viereck-Götte, Lothar 1989 application/zip https://dx.doi.org/10.1594/pangaea.736965 https://doi.pangaea.de/10.1594/PANGAEA.736965 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.104.129.1989 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg104 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 1989 ftdatacite https://doi.org/10.1594/pangaea.736965 https://doi.org/10.2973/odp.proc.sr.104.129.1989 2022-02-08T16:24:46Z Numerous fresh ash layers comprise about 0.3% by volume of Neogene to Holocene sediments drilled at Leg 104 Sites 642 and 643 (Vøring Plateau, North Atlantic). Median grain sizes of the ashes are about 100 /µm and maximum grain sizes range up to 1200 µm. Rhyolitic pumice shards dominate, with minor bubble wall shards. Basaltic shards are poorly vesicular and blocky or round. Phenocrystic plagioclase, zircon, and clinopyroxene occur in the rhyolitic, plagioclase, and clinopyroxene phenocrysts and basaltic lithics in the basaltic tephra. Quartz, amphibole, clinozoisite, and rutile are interpreted as xenocrysts. All ash layers are well-sorted and represent distal fallout from major explosive eruptions. Most ashes are rhyolitic (high-K and low-K) in composition, some are bimodal (tholeiitic and rhyolitic). Early Miocene tephra is dominantly basaltic.Iceland is inferred to be the likely source region for most ashes. Late Miocene high-K rhyolites may have originated from the K-rich Jan Mayen magmatic province. One Quaternary layer with biotite and alkali feldspar phenocrysts may have been derived from Jan Mayen Island. Four individual Pliocene to Holocene ash layers from Sites 642 and 643 can be correlated fairly well. Upper Miocene layers are tentatively correlated as a sequence between Sites 642 and 643.Average calculated layer frequencies are about three layers/m.y. through the Pliocene and Pleistocene and five to eight layers per m.y. through the middle and late Miocene, suggesting rather continuous volcanic activity in the North Atlantic. Episodic magmatic activity during Neogene epochs in this part of the North Atlantic, as postulated in the literature, cannot be confirmed. Article in Journal/Newspaper Jan Mayen Jan Mayen Island North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Jan Mayen Rene ENVELOPE(-178.833,-178.833,65.967,65.967) Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg104 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Leg104 Joides Resolution Ocean Drilling Program ODP Bitschene, Peter Rene Schmincke, Hans-Ulrich Viereck-Götte, Lothar Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
topic_facet |
Drilling/drill rig Leg104 Joides Resolution Ocean Drilling Program ODP |
description |
Numerous fresh ash layers comprise about 0.3% by volume of Neogene to Holocene sediments drilled at Leg 104 Sites 642 and 643 (Vøring Plateau, North Atlantic). Median grain sizes of the ashes are about 100 /µm and maximum grain sizes range up to 1200 µm. Rhyolitic pumice shards dominate, with minor bubble wall shards. Basaltic shards are poorly vesicular and blocky or round. Phenocrystic plagioclase, zircon, and clinopyroxene occur in the rhyolitic, plagioclase, and clinopyroxene phenocrysts and basaltic lithics in the basaltic tephra. Quartz, amphibole, clinozoisite, and rutile are interpreted as xenocrysts. All ash layers are well-sorted and represent distal fallout from major explosive eruptions. Most ashes are rhyolitic (high-K and low-K) in composition, some are bimodal (tholeiitic and rhyolitic). Early Miocene tephra is dominantly basaltic.Iceland is inferred to be the likely source region for most ashes. Late Miocene high-K rhyolites may have originated from the K-rich Jan Mayen magmatic province. One Quaternary layer with biotite and alkali feldspar phenocrysts may have been derived from Jan Mayen Island. Four individual Pliocene to Holocene ash layers from Sites 642 and 643 can be correlated fairly well. Upper Miocene layers are tentatively correlated as a sequence between Sites 642 and 643.Average calculated layer frequencies are about three layers/m.y. through the Pliocene and Pleistocene and five to eight layers per m.y. through the middle and late Miocene, suggesting rather continuous volcanic activity in the North Atlantic. Episodic magmatic activity during Neogene epochs in this part of the North Atlantic, as postulated in the literature, cannot be confirmed. |
format |
Article in Journal/Newspaper |
author |
Bitschene, Peter Rene Schmincke, Hans-Ulrich Viereck-Götte, Lothar |
author_facet |
Bitschene, Peter Rene Schmincke, Hans-Ulrich Viereck-Götte, Lothar |
author_sort |
Bitschene, Peter Rene |
title |
Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
title_short |
Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
title_full |
Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
title_fullStr |
Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
title_full_unstemmed |
Chemical analysis of ash layers in ODP Leg 104 holes, supplement to: Bitschene, Peter Rene; Schmincke, Hans-Ulrich; Viereck-Götte, Lothar (1989): Cenozoic ash layers on the Vøring Plateau (ODP Leg 104). In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 357-366 |
title_sort |
chemical analysis of ash layers in odp leg 104 holes, supplement to: bitschene, peter rene; schmincke, hans-ulrich; viereck-götte, lothar (1989): cenozoic ash layers on the vøring plateau (odp leg 104). in: eldholm, o; thiede, j; taylor, e; et al. (eds.), proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 104, 357-366 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1989 |
url |
https://dx.doi.org/10.1594/pangaea.736965 https://doi.pangaea.de/10.1594/PANGAEA.736965 |
long_lat |
ENVELOPE(-178.833,-178.833,65.967,65.967) ENVELOPE(4.000,4.000,67.000,67.000) |
geographic |
Jan Mayen Rene Vøring Plateau |
geographic_facet |
Jan Mayen Rene Vøring Plateau |
genre |
Jan Mayen Jan Mayen Island North Atlantic |
genre_facet |
Jan Mayen Jan Mayen Island North Atlantic |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.104.129.1989 |
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.736965 https://doi.org/10.2973/odp.proc.sr.104.129.1989 |
_version_ |
1766048296217870336 |