Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns?
Surface sediment samples and three gravity cores from the eastern terrace of the Vema Channel, the western flank of the Rio Grande Rise, and the Brazilian continental slope were investigated for physical properties, grain size, and clay mineral composition. Discharge of the Rio Doce is responsible f...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Amer Geophysical Union
1999
|
Subjects: | |
Online Access: | https://doi.org/10.1029/1998PA900012 https://archimer.ifremer.fr/doc/00240/35077/34547.pdf https://archimer.ifremer.fr/doc/00240/35077/ |
id |
fttriple:oai:gotriple.eu:10670/1.3cnm6b |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:10670/1.3cnm6b 2023-05-15T17:25:24+02:00 Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? Gingele, Fx Schmieder, F Von Dobeneck, T Petschick, R Ruhlemann, C 1999-01-01 https://doi.org/10.1029/1998PA900012 https://archimer.ifremer.fr/doc/00240/35077/34547.pdf https://archimer.ifremer.fr/doc/00240/35077/ en eng Amer Geophysical Union doi:10.1029/1998PA900012 10670/1.3cnm6b https://archimer.ifremer.fr/doc/00240/35077/34547.pdf https://archimer.ifremer.fr/doc/00240/35077/ Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 1999-02 , Vol. 14 , N. 1 , P. 84-95 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 1999 fttriple https://doi.org/10.1029/1998PA900012 2023-01-22T16:33:39Z Surface sediment samples and three gravity cores from the eastern terrace of the Vema Channel, the western flank of the Rio Grande Rise, and the Brazilian continental slope were investigated for physical properties, grain size, and clay mineral composition. Discharge of the Rio Doce is responsible for kaolinite enrichments on the slope south of 20 degrees and at intermediate depths of the Rio Grande Rise. The long-distance advection of kaolinite with North Atlantic Deep Water from lower latitudes is of minor importance as evidenced by low kaolinite/chlorite ratios on the Mid-Atlantic Ridge. Cyclic variations of kaolinite/chlorite ratios in all our cores, with maxima in interglacials, are attributed to low- and high-latitude forcing of paleoclimate on the Brazilian mainland and the related discharge of the Rio Doce. A longterm trend toward more arid and "glacial" conditions from 1500 ka to present is superimposed on the glacial-interglacial cyclicity. Text North Atlantic Deep Water North Atlantic Unknown Mid-Atlantic Ridge Paleoceanography 14 1 84 95 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Gingele, Fx Schmieder, F Von Dobeneck, T Petschick, R Ruhlemann, C Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
topic_facet |
geo envir |
description |
Surface sediment samples and three gravity cores from the eastern terrace of the Vema Channel, the western flank of the Rio Grande Rise, and the Brazilian continental slope were investigated for physical properties, grain size, and clay mineral composition. Discharge of the Rio Doce is responsible for kaolinite enrichments on the slope south of 20 degrees and at intermediate depths of the Rio Grande Rise. The long-distance advection of kaolinite with North Atlantic Deep Water from lower latitudes is of minor importance as evidenced by low kaolinite/chlorite ratios on the Mid-Atlantic Ridge. Cyclic variations of kaolinite/chlorite ratios in all our cores, with maxima in interglacials, are attributed to low- and high-latitude forcing of paleoclimate on the Brazilian mainland and the related discharge of the Rio Doce. A longterm trend toward more arid and "glacial" conditions from 1500 ka to present is superimposed on the glacial-interglacial cyclicity. |
format |
Text |
author |
Gingele, Fx Schmieder, F Von Dobeneck, T Petschick, R Ruhlemann, C |
author_facet |
Gingele, Fx Schmieder, F Von Dobeneck, T Petschick, R Ruhlemann, C |
author_sort |
Gingele, Fx |
title |
Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
title_short |
Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
title_full |
Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
title_fullStr |
Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
title_full_unstemmed |
Terrigenous flux in the Rio Grande Rise area during the past 1500 ka: Evidence of deepwater advection or rapid response to continental rainfall patterns? |
title_sort |
terrigenous flux in the rio grande rise area during the past 1500 ka: evidence of deepwater advection or rapid response to continental rainfall patterns? |
publisher |
Amer Geophysical Union |
publishDate |
1999 |
url |
https://doi.org/10.1029/1998PA900012 https://archimer.ifremer.fr/doc/00240/35077/34547.pdf https://archimer.ifremer.fr/doc/00240/35077/ |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 1999-02 , Vol. 14 , N. 1 , P. 84-95 |
op_relation |
doi:10.1029/1998PA900012 10670/1.3cnm6b https://archimer.ifremer.fr/doc/00240/35077/34547.pdf https://archimer.ifremer.fr/doc/00240/35077/ |
op_doi |
https://doi.org/10.1029/1998PA900012 |
container_title |
Paleoceanography |
container_volume |
14 |
container_issue |
1 |
container_start_page |
84 |
op_container_end_page |
95 |
_version_ |
1766116822079242240 |