Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin
The late Eocene through earliest Oligocene (40-32 Ma) spans a major transition from greenhouse to icehouse climate, with net cooling and expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. We investigated the response of the oceanic biosphere to these changes by reco...
Main Authors: | , , , , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
2010
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.831385 https://doi.org/10.1594/PANGAEA.831385 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.831385 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.831385 2024-09-09T19:01:50+00:00 Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin Griffith, Elizabeth M Calhoun, Michael Thomas, Ellen Averyt, Kristen Erhardt, Andrea M Bralower, Timothy J Lyle, Mitchell W Olivarez Lyle, Annette Paytan, Adina MEDIAN LATITUDE: 28.083411 * MEDIAN LONGITUDE: 168.603721 * SOUTH-BOUND LATITUDE: 4.208700 * WEST-BOUND LONGITUDE: 157.850000 * NORTH-BOUND LATITUDE: 32.651800 * EAST-BOUND LONGITUDE: -133.330200 * DATE/TIME START: 1982-04-11T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 2010 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.831385 https://doi.org/10.1594/PANGAEA.831385 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.831385 https://doi.org/10.1594/PANGAEA.831385 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Griffith, Elizabeth M; Calhoun, Michael; Thomas, Ellen; Averyt, Kristen; Erhardt, Andrea M; Bralower, Timothy J; Lyle, Mitchell W; Olivarez Lyle, Annette; Paytan, Adina (2010): Export productivity and carbonate accumulation in the Pacific Basin at the transition from a greenhouse to icehouse climate (late Eocene to early Oligocene). Paleoceanography, 25(3), PA3212, https://doi.org/10.1029/2010PA001932 Deep Sea Drilling Project DSDP Ocean Drilling Program ODP dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.83138510.1029/2010PA001932 2024-07-24T02:31:21Z The late Eocene through earliest Oligocene (40-32 Ma) spans a major transition from greenhouse to icehouse climate, with net cooling and expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. We investigated the response of the oceanic biosphere to these changes by reconstructing barite and CaCO3 accumulation rates in sediments from the equatorial and North Pacific Ocean. These data allow us to evaluate temporal and geographical variability in export production and CaCO3 preservation. Barite accumulation rates were on average higher in the warmer late Eocene than in the colder early Oligocene, but cool periods within the Eocene were characterized by peaks in both barite and CaCO3 accumulation in the equatorial region. We infer that climatic changes not only affected deep ocean ventilation and chemistry, but also had profound effects on surface water characteristics influencing export productivity. The ratio of CaCO3 to barite accumulation rates, representing the ratio of particulate inorganic C accumulation to Corg export, increased dramatically at the E/O boundary. This suggests that long-term drawdown of atmospheric CO2 due to organic carbon deposition to the seafloor decreased, potentially offsetting decreasing pCO2 levels and associated cooling. The relatively larger increase in CaCO3 accumulation compared to export production at the E/O suggests that the permanent deepening of the calcite compensation depth (CCD) at that time stems primarily from changes in deep water chemistry and not from increased carbonate production. Other/Unknown Material Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific ENVELOPE(157.850000,-133.330200,32.651800,4.208700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
spellingShingle |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP Griffith, Elizabeth M Calhoun, Michael Thomas, Ellen Averyt, Kristen Erhardt, Andrea M Bralower, Timothy J Lyle, Mitchell W Olivarez Lyle, Annette Paytan, Adina Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
topic_facet |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
description |
The late Eocene through earliest Oligocene (40-32 Ma) spans a major transition from greenhouse to icehouse climate, with net cooling and expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. We investigated the response of the oceanic biosphere to these changes by reconstructing barite and CaCO3 accumulation rates in sediments from the equatorial and North Pacific Ocean. These data allow us to evaluate temporal and geographical variability in export production and CaCO3 preservation. Barite accumulation rates were on average higher in the warmer late Eocene than in the colder early Oligocene, but cool periods within the Eocene were characterized by peaks in both barite and CaCO3 accumulation in the equatorial region. We infer that climatic changes not only affected deep ocean ventilation and chemistry, but also had profound effects on surface water characteristics influencing export productivity. The ratio of CaCO3 to barite accumulation rates, representing the ratio of particulate inorganic C accumulation to Corg export, increased dramatically at the E/O boundary. This suggests that long-term drawdown of atmospheric CO2 due to organic carbon deposition to the seafloor decreased, potentially offsetting decreasing pCO2 levels and associated cooling. The relatively larger increase in CaCO3 accumulation compared to export production at the E/O suggests that the permanent deepening of the calcite compensation depth (CCD) at that time stems primarily from changes in deep water chemistry and not from increased carbonate production. |
format |
Other/Unknown Material |
author |
Griffith, Elizabeth M Calhoun, Michael Thomas, Ellen Averyt, Kristen Erhardt, Andrea M Bralower, Timothy J Lyle, Mitchell W Olivarez Lyle, Annette Paytan, Adina |
author_facet |
Griffith, Elizabeth M Calhoun, Michael Thomas, Ellen Averyt, Kristen Erhardt, Andrea M Bralower, Timothy J Lyle, Mitchell W Olivarez Lyle, Annette Paytan, Adina |
author_sort |
Griffith, Elizabeth M |
title |
Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
title_short |
Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
title_full |
Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
title_fullStr |
Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
title_full_unstemmed |
Late Eocene to early Oligocene carbonate and barite accumulation rates in the Pacific Basin |
title_sort |
late eocene to early oligocene carbonate and barite accumulation rates in the pacific basin |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.831385 https://doi.org/10.1594/PANGAEA.831385 |
op_coverage |
MEDIAN LATITUDE: 28.083411 * MEDIAN LONGITUDE: 168.603721 * SOUTH-BOUND LATITUDE: 4.208700 * WEST-BOUND LONGITUDE: 157.850000 * NORTH-BOUND LATITUDE: 32.651800 * EAST-BOUND LONGITUDE: -133.330200 * DATE/TIME START: 1982-04-11T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 |
long_lat |
ENVELOPE(157.850000,-133.330200,32.651800,4.208700) |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Supplement to: Griffith, Elizabeth M; Calhoun, Michael; Thomas, Ellen; Averyt, Kristen; Erhardt, Andrea M; Bralower, Timothy J; Lyle, Mitchell W; Olivarez Lyle, Annette; Paytan, Adina (2010): Export productivity and carbonate accumulation in the Pacific Basin at the transition from a greenhouse to icehouse climate (late Eocene to early Oligocene). Paleoceanography, 25(3), PA3212, https://doi.org/10.1029/2010PA001932 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.831385 https://doi.org/10.1594/PANGAEA.831385 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.83138510.1029/2010PA001932 |
_version_ |
1809815379489325056 |