Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope
We present late Quaternary records of aragonite preservation determined for sediment cores recovered on the Brazilian Continental Slope (1790-2585 m water depth) where North Atlantic Deep Water (NADW) dominates at present. We have used various indirect dissolution proxies (carbonate content, aragoni...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.712059 2023-05-15T17:13:54+02:00 Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope Gerhardt, Sabine Groth, H Rühlemann, Carsten Henrich, Rüdiger MEDIAN LATITUDE: -8.601190 * MEDIAN LONGITUDE: -34.146905 * SOUTH-BOUND LATITUDE: -8.735000 * WEST-BOUND LONGITUDE: -34.345000 * NORTH-BOUND LATITUDE: -8.528333 * EAST-BOUND LONGITUDE: -34.021667 * DATE/TIME START: 1993-03-22T00:00:00 * DATE/TIME END: 1993-03-23T00:00:00 2000-01-29 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.712059 https://doi.org/10.1594/PANGAEA.712059 en eng PANGAEA Gerhardt, Sabine (2001): Late Quaternary water mass variability derived from the pteropod preservation state in sediments of the western South Atlantic Ocean and the Caribbean Sea. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 171, 109 pp, urn:nbn:de:gbv:46-ep000102968 https://doi.pangaea.de/10.1594/PANGAEA.712059 https://doi.org/10.1594/PANGAEA.712059 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Gerhardt, Sabine; Groth, H; Rühlemann, Carsten; Henrich, Rüdiger (2000): Aragonite preservation in late Quaternary sediment cores on the Brazilian Continental Slope: implications for intermediate water circulation. International Journal of Earth Sciences, 88(4), 607-618, https://doi.org/10.1007/s005310050291 Brazil Basin GeoB2204-1 GeoB2204-2 GeoB2205-4 GeoB2207-2 Gravity corer (Kiel type) M23/3 Meteor (1986) MUC MultiCorer SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.712059 https://doi.org/10.1007/s005310050291 2023-01-20T07:31:22Z We present late Quaternary records of aragonite preservation determined for sediment cores recovered on the Brazilian Continental Slope (1790-2585 m water depth) where North Atlantic Deep Water (NADW) dominates at present. We have used various indirect dissolution proxies (carbonate content, aragonite/calcite contents, and sand percentages) as well as gastropodal abundances and fragmentation of Limacina inflata to determine the state of aragonite preservation. In addition, microscopic investigations of the dissolution susceptibility of three Limacina species yielded the Limacina Dissolution Index which correlates well with most of the other proxies. Excellent preservation of aragonite was found in the Holocene section, whereas aragonite dissolution gradually increases downcore. This general pattern is attributed to an overall increase in aragonite corrosiveness of pore waters. Overprinted on this early diagenetic trend are high-frequency fluctuations of aragonite preservation, which may be related to climatically induced variations of intermediate water masses. Dataset NADW North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-34.345000,-34.021667,-8.528333,-8.735000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Brazil Basin GeoB2204-1 GeoB2204-2 GeoB2205-4 GeoB2207-2 Gravity corer (Kiel type) M23/3 Meteor (1986) MUC MultiCorer SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
spellingShingle |
Brazil Basin GeoB2204-1 GeoB2204-2 GeoB2205-4 GeoB2207-2 Gravity corer (Kiel type) M23/3 Meteor (1986) MUC MultiCorer SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Gerhardt, Sabine Groth, H Rühlemann, Carsten Henrich, Rüdiger Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
topic_facet |
Brazil Basin GeoB2204-1 GeoB2204-2 GeoB2205-4 GeoB2207-2 Gravity corer (Kiel type) M23/3 Meteor (1986) MUC MultiCorer SFB261 SL South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
description |
We present late Quaternary records of aragonite preservation determined for sediment cores recovered on the Brazilian Continental Slope (1790-2585 m water depth) where North Atlantic Deep Water (NADW) dominates at present. We have used various indirect dissolution proxies (carbonate content, aragonite/calcite contents, and sand percentages) as well as gastropodal abundances and fragmentation of Limacina inflata to determine the state of aragonite preservation. In addition, microscopic investigations of the dissolution susceptibility of three Limacina species yielded the Limacina Dissolution Index which correlates well with most of the other proxies. Excellent preservation of aragonite was found in the Holocene section, whereas aragonite dissolution gradually increases downcore. This general pattern is attributed to an overall increase in aragonite corrosiveness of pore waters. Overprinted on this early diagenetic trend are high-frequency fluctuations of aragonite preservation, which may be related to climatically induced variations of intermediate water masses. |
format |
Dataset |
author |
Gerhardt, Sabine Groth, H Rühlemann, Carsten Henrich, Rüdiger |
author_facet |
Gerhardt, Sabine Groth, H Rühlemann, Carsten Henrich, Rüdiger |
author_sort |
Gerhardt, Sabine |
title |
Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
title_short |
Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
title_full |
Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
title_fullStr |
Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
title_full_unstemmed |
Aragonite distribution and preservation of sediment cores from the Brazilian Continental Slope |
title_sort |
aragonite distribution and preservation of sediment cores from the brazilian continental slope |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.712059 https://doi.org/10.1594/PANGAEA.712059 |
op_coverage |
MEDIAN LATITUDE: -8.601190 * MEDIAN LONGITUDE: -34.146905 * SOUTH-BOUND LATITUDE: -8.735000 * WEST-BOUND LONGITUDE: -34.345000 * NORTH-BOUND LATITUDE: -8.528333 * EAST-BOUND LONGITUDE: -34.021667 * DATE/TIME START: 1993-03-22T00:00:00 * DATE/TIME END: 1993-03-23T00:00:00 |
long_lat |
ENVELOPE(-34.345000,-34.021667,-8.528333,-8.735000) |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Gerhardt, Sabine; Groth, H; Rühlemann, Carsten; Henrich, Rüdiger (2000): Aragonite preservation in late Quaternary sediment cores on the Brazilian Continental Slope: implications for intermediate water circulation. International Journal of Earth Sciences, 88(4), 607-618, https://doi.org/10.1007/s005310050291 |
op_relation |
Gerhardt, Sabine (2001): Late Quaternary water mass variability derived from the pteropod preservation state in sediments of the western South Atlantic Ocean and the Caribbean Sea. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 171, 109 pp, urn:nbn:de:gbv:46-ep000102968 https://doi.pangaea.de/10.1594/PANGAEA.712059 https://doi.org/10.1594/PANGAEA.712059 |
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.712059 https://doi.org/10.1007/s005310050291 |
_version_ |
1766071090333876224 |