Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions
This data set include (1) the detailed petrographic description of the diagnostic rock types used to infer the source areas of the material recovered from the Mar del Plata Canyon area (Western South Atlantic at 38° S) at Sites GeoB13830, GeoB22712, GeoB22717 and L45; and (2) the Acoustic Doppler Cu...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.925557 2024-05-19T07:30:21+00:00 Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions Bozzano, Graziella Baqués, Michele Schwenk, Tilmann Kasten, Sabine MEDIAN LATITUDE: -37.910805 * MEDIAN LONGITUDE: -54.435525 * SOUTH-BOUND LATITUDE: -38.331950 * WEST-BOUND LONGITUDE: -54.620600 * NORTH-BOUND LATITUDE: -37.542783 * EAST-BOUND LONGITUDE: -53.654467 * DATE/TIME START: 2009-06-07T13:49:00 * DATE/TIME END: 2018-01-29T10:15:00 2020 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.925557 https://doi.org/10.1594/PANGAEA.925557 en eng PANGAEA Bozzano, Graziella; Cerredo, Maria Elena; Remesal, Marcela; Steinmann, Lena; Hanebuth, Till J J; Schwenk, Tilmann; Baqués, Michele; Hebbeln, Dierk; Spoltore, Daniela; Silvestri, Ornella; Acevedo, R D; Spieß, Volkhard; Violante, R A; Kasten, Sabine (2020): Dropstones in the Mar del Plata Canyon Area (SW Atlantic): Evidence for Provenance, Transport, Distribution, and Oceanographic Implications. Geochemistry, Geophysics, Geosystems, 22(1), e2020GC009333, https://doi.org/10.1029/2020GC009333 https://doi.pangaea.de/10.1594/PANGAEA.925557 https://doi.org/10.1594/PANGAEA.925557 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess ADCP data Argentine continental slope Center for Marine Environmental Sciences MARUM SW Atlantic Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.92555710.1029/2020GC009333 2024-04-23T23:36:33Z This data set include (1) the detailed petrographic description of the diagnostic rock types used to infer the source areas of the material recovered from the Mar del Plata Canyon area (Western South Atlantic at 38° S) at Sites GeoB13830, GeoB22712, GeoB22717 and L45; and (2) the Acoustic Doppler Current Profiler (ADCP) data obtained from Sites GeoB22716, GeoB22717 and GeoB22732. A variety of gravel- to cobble-sized rocks, recovered from the Mar del Plata Canyon area and interpreted as ice-rafted debris, represents the first evidence that large icebergs have floated in the Falkland (Malvinas) Current from the southern polar high latitudes far northward. Detailed petrographic analyses identified the Antarctic Peninsula, sub-Antarctic islands in the Scotia Sea, and Tierra del Fuego as plausible source areas. In the Mar del Plata Canyon, a combination of local slope instability and strong and persistent contouritic bottom currents, favored local enrichment in dropstones in the form of a loose, coarse sediment drape inside morphological depressions. The bottom current velocity would be locally strong enough to rework this sediment, leaving coarse rafted debris as a lag deposit. Microscopic petrograohic determinations were done on thin sections to identify the mineralogical composition of the rocks. During cruise SONNE SO260-1, the hull mounted Ocean Surveyor Teledyne RDI Acoustic Doppler Current Profiler (ADCP) with a doppler shift of 38 kHz provided real-time current velocity profiles over a range from 38 to 1,200 m water depth. ADCP data from the lowest 10-15 % of the water column have been removed due to possible scattering caused by strong seafloor echo. Doppler shifts were converted into current velocities using real water sound velocities by means of Conductivity-Temperature-Depth (CTD) and Expendable Sound Velocimeter (XSV) profile calibration. Water depth (m), current velocity (cm sec-1) and direction (degrees) measured with ADCP at Site GeoB22732 (La Plata Terrace Moat), at Site GeoB22717 (Ewing Terrace ... Dataset Antarc* Antarctic Antarctic Peninsula Iceberg* Scotia Sea Tierra del Fuego PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-54.620600,-53.654467,-37.542783,-38.331950) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ADCP data Argentine continental slope Center for Marine Environmental Sciences MARUM SW Atlantic |
spellingShingle |
ADCP data Argentine continental slope Center for Marine Environmental Sciences MARUM SW Atlantic Bozzano, Graziella Baqués, Michele Schwenk, Tilmann Kasten, Sabine Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
topic_facet |
ADCP data Argentine continental slope Center for Marine Environmental Sciences MARUM SW Atlantic |
description |
This data set include (1) the detailed petrographic description of the diagnostic rock types used to infer the source areas of the material recovered from the Mar del Plata Canyon area (Western South Atlantic at 38° S) at Sites GeoB13830, GeoB22712, GeoB22717 and L45; and (2) the Acoustic Doppler Current Profiler (ADCP) data obtained from Sites GeoB22716, GeoB22717 and GeoB22732. A variety of gravel- to cobble-sized rocks, recovered from the Mar del Plata Canyon area and interpreted as ice-rafted debris, represents the first evidence that large icebergs have floated in the Falkland (Malvinas) Current from the southern polar high latitudes far northward. Detailed petrographic analyses identified the Antarctic Peninsula, sub-Antarctic islands in the Scotia Sea, and Tierra del Fuego as plausible source areas. In the Mar del Plata Canyon, a combination of local slope instability and strong and persistent contouritic bottom currents, favored local enrichment in dropstones in the form of a loose, coarse sediment drape inside morphological depressions. The bottom current velocity would be locally strong enough to rework this sediment, leaving coarse rafted debris as a lag deposit. Microscopic petrograohic determinations were done on thin sections to identify the mineralogical composition of the rocks. During cruise SONNE SO260-1, the hull mounted Ocean Surveyor Teledyne RDI Acoustic Doppler Current Profiler (ADCP) with a doppler shift of 38 kHz provided real-time current velocity profiles over a range from 38 to 1,200 m water depth. ADCP data from the lowest 10-15 % of the water column have been removed due to possible scattering caused by strong seafloor echo. Doppler shifts were converted into current velocities using real water sound velocities by means of Conductivity-Temperature-Depth (CTD) and Expendable Sound Velocimeter (XSV) profile calibration. Water depth (m), current velocity (cm sec-1) and direction (degrees) measured with ADCP at Site GeoB22732 (La Plata Terrace Moat), at Site GeoB22717 (Ewing Terrace ... |
format |
Dataset |
author |
Bozzano, Graziella Baqués, Michele Schwenk, Tilmann Kasten, Sabine |
author_facet |
Bozzano, Graziella Baqués, Michele Schwenk, Tilmann Kasten, Sabine |
author_sort |
Bozzano, Graziella |
title |
Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
title_short |
Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
title_full |
Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
title_fullStr |
Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
title_full_unstemmed |
Acoustic Doppler Current Profiler (ADCP) data of sites GeoB22716-1, GeoB22717-1 and GeoB22732-1 during RV SONNE cruise SO260/1 and rock descriptions |
title_sort |
acoustic doppler current profiler (adcp) data of sites geob22716-1, geob22717-1 and geob22732-1 during rv sonne cruise so260/1 and rock descriptions |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.925557 https://doi.org/10.1594/PANGAEA.925557 |
op_coverage |
MEDIAN LATITUDE: -37.910805 * MEDIAN LONGITUDE: -54.435525 * SOUTH-BOUND LATITUDE: -38.331950 * WEST-BOUND LONGITUDE: -54.620600 * NORTH-BOUND LATITUDE: -37.542783 * EAST-BOUND LONGITUDE: -53.654467 * DATE/TIME START: 2009-06-07T13:49:00 * DATE/TIME END: 2018-01-29T10:15:00 |
long_lat |
ENVELOPE(-54.620600,-53.654467,-37.542783,-38.331950) |
genre |
Antarc* Antarctic Antarctic Peninsula Iceberg* Scotia Sea Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Iceberg* Scotia Sea Tierra del Fuego |
op_relation |
Bozzano, Graziella; Cerredo, Maria Elena; Remesal, Marcela; Steinmann, Lena; Hanebuth, Till J J; Schwenk, Tilmann; Baqués, Michele; Hebbeln, Dierk; Spoltore, Daniela; Silvestri, Ornella; Acevedo, R D; Spieß, Volkhard; Violante, R A; Kasten, Sabine (2020): Dropstones in the Mar del Plata Canyon Area (SW Atlantic): Evidence for Provenance, Transport, Distribution, and Oceanographic Implications. Geochemistry, Geophysics, Geosystems, 22(1), e2020GC009333, https://doi.org/10.1029/2020GC009333 https://doi.pangaea.de/10.1594/PANGAEA.925557 https://doi.org/10.1594/PANGAEA.925557 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.92555710.1029/2020GC009333 |
_version_ |
1799485615113240576 |