Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A
In 2004, Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition, ACEX) to the Lomonosov Ridge drilled the first Central Arctic Ocean sediment record reaching the uppermost Cretaceous (~430 m composite depth). While the Neogene part of the record is characterized by grayish-yellow...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2011
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.786428 https://doi.org/10.1594/PANGAEA.786428 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786428 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786428 2023-05-15T14:26:05+02:00 Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A März, Christian Vogt, Christoph Schnetger, Bernhard Brumsack, Hans-Jürgen LATITUDE: 87.921180 * LONGITUDE: 139.365010 * DATE/TIME START: 2004-08-19T00:00:00 * DATE/TIME END: 2004-08-19T00:00:00 2011-07-20 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.786428 https://doi.org/10.1594/PANGAEA.786428 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.786428 https://doi.org/10.1594/PANGAEA.786428 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: März, Christian; Vogt, Christoph; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2011): Variable Eocene-Miocene sedimentation processes and bottom water redox conditions in the Central Arctic Ocean (IODP Expeditrion 302). Earth and Planetary Science Letters, 310(3-4), 526-537, https://doi.org/10.1016/j.epsl.2011.08.025 302-M0002A ACEX-M2A Arctic Coring Expedition ACEX Arctic Ocean Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Vidar Viking Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.786428 https://doi.org/10.1016/j.epsl.2011.08.025 2023-01-20T07:32:37Z In 2004, Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition, ACEX) to the Lomonosov Ridge drilled the first Central Arctic Ocean sediment record reaching the uppermost Cretaceous (~430 m composite depth). While the Neogene part of the record is characterized by grayish-yellowish siliciclastic material, the Paleogene part is dominated by biosiliceous black shale-type sediments. The lithological transition between Paleogene and Neogene deposits was initially interpreted as a single sedimentological unconformity (hiatus) of ~26 Ma duration, separating Eocene from Miocene strata. More recently, however, continuous sedimentation on Lomonosov Ridge throughout the Cenozoic was proclaimed, questioning the existence of a hiatus. In this context, we studied the elemental and mineralogical sediment composition around the Paleogene-Neogene transition at high resolution to reconstruct variations in the depositional regime (e.g. wave/current activity, detrital provenance, and bottom water redox conditions). Already below the hiatus, mineralogical and geochemical proxies imply drastic changes in sediment provenance and/or weathering intensity in the hinterland, and point to the existence of another, earlier gap in the sediment record. The sediments directly overlying the hiatus (the Zebra interval) are characterized by pronounced and abrupt compositional changes that suggest repeated erosion and re-deposition of material. Regarding redox conditions, euxinic bottom waters prevailed at the Eocene Lomonosov Ridge, and became even more severe directly before the hiatus. With detrital sedimentation rates decreasing, authigenic trace metals were highly enriched in the sediment. This continuous authigenic trace metal enrichment under persistent euxinia implies that the Arctic trace metal pool was renewed continuously by water mass exchange with the world ocean, so the Eocene Arctic Ocean was not fully restricted. Above the hiatus, extreme positive Ce anomalies are clear signs of a periodically well-oxygenated ... Dataset Arctic Arctic Arctic Ocean Lomonosov Ridge PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean ENVELOPE(139.365010,139.365010,87.921180,87.921180) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
302-M0002A ACEX-M2A Arctic Coring Expedition ACEX Arctic Ocean Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Vidar Viking |
spellingShingle |
302-M0002A ACEX-M2A Arctic Coring Expedition ACEX Arctic Ocean Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Vidar Viking März, Christian Vogt, Christoph Schnetger, Bernhard Brumsack, Hans-Jürgen Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
topic_facet |
302-M0002A ACEX-M2A Arctic Coring Expedition ACEX Arctic Ocean Exp302 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Vidar Viking |
description |
In 2004, Integrated Ocean Drilling Program Expedition 302 (Arctic Coring Expedition, ACEX) to the Lomonosov Ridge drilled the first Central Arctic Ocean sediment record reaching the uppermost Cretaceous (~430 m composite depth). While the Neogene part of the record is characterized by grayish-yellowish siliciclastic material, the Paleogene part is dominated by biosiliceous black shale-type sediments. The lithological transition between Paleogene and Neogene deposits was initially interpreted as a single sedimentological unconformity (hiatus) of ~26 Ma duration, separating Eocene from Miocene strata. More recently, however, continuous sedimentation on Lomonosov Ridge throughout the Cenozoic was proclaimed, questioning the existence of a hiatus. In this context, we studied the elemental and mineralogical sediment composition around the Paleogene-Neogene transition at high resolution to reconstruct variations in the depositional regime (e.g. wave/current activity, detrital provenance, and bottom water redox conditions). Already below the hiatus, mineralogical and geochemical proxies imply drastic changes in sediment provenance and/or weathering intensity in the hinterland, and point to the existence of another, earlier gap in the sediment record. The sediments directly overlying the hiatus (the Zebra interval) are characterized by pronounced and abrupt compositional changes that suggest repeated erosion and re-deposition of material. Regarding redox conditions, euxinic bottom waters prevailed at the Eocene Lomonosov Ridge, and became even more severe directly before the hiatus. With detrital sedimentation rates decreasing, authigenic trace metals were highly enriched in the sediment. This continuous authigenic trace metal enrichment under persistent euxinia implies that the Arctic trace metal pool was renewed continuously by water mass exchange with the world ocean, so the Eocene Arctic Ocean was not fully restricted. Above the hiatus, extreme positive Ce anomalies are clear signs of a periodically well-oxygenated ... |
format |
Dataset |
author |
März, Christian Vogt, Christoph Schnetger, Bernhard Brumsack, Hans-Jürgen |
author_facet |
März, Christian Vogt, Christoph Schnetger, Bernhard Brumsack, Hans-Jürgen |
author_sort |
März, Christian |
title |
Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
title_short |
Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
title_full |
Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
title_fullStr |
Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
title_full_unstemmed |
Geochemistry and mineralogy of Eocene-Oligocene sediments of IODP Hole 302-M0002A |
title_sort |
geochemistry and mineralogy of eocene-oligocene sediments of iodp hole 302-m0002a |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.786428 https://doi.org/10.1594/PANGAEA.786428 |
op_coverage |
LATITUDE: 87.921180 * LONGITUDE: 139.365010 * DATE/TIME START: 2004-08-19T00:00:00 * DATE/TIME END: 2004-08-19T00:00:00 |
long_lat |
ENVELOPE(139.365010,139.365010,87.921180,87.921180) |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Lomonosov Ridge |
genre_facet |
Arctic Arctic Arctic Ocean Lomonosov Ridge |
op_source |
Supplement to: März, Christian; Vogt, Christoph; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2011): Variable Eocene-Miocene sedimentation processes and bottom water redox conditions in the Central Arctic Ocean (IODP Expeditrion 302). Earth and Planetary Science Letters, 310(3-4), 526-537, https://doi.org/10.1016/j.epsl.2011.08.025 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.786428 https://doi.org/10.1594/PANGAEA.786428 |
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.786428 https://doi.org/10.1016/j.epsl.2011.08.025 |
_version_ |
1766298560144343040 |