Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments
In the framework of national (PNRA) and international (ESF HOLOCLIP project - Holocene climate variability at high-Southern latitudes: an integrated perspective) projects, several marine cores were retrieved from the Antarctic continental margin, in the Indian sector of the Antarctic Ocean (CB2010 A...
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ftuniveneziairis:oai:iris.unive.it:10278/42754 2024-01-28T10:00:54+01:00 Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments R. Traversi D. Becagli E. Colizza G. Gori M. Marconi R. Melis K. Mezgec M. Severi R. Udisti STENNI, Barbara FIST-Federazione Italiana Scienze della Terra R., Traversi D., Becagli E., Colizza G., Gori M., Marconi R., Meli K., Mezgec M., Severi Stenni, Barbara R., Udisti 2013 http://hdl.handle.net/10278/42754 eng eng FIST, Federazione Italiana di Scienze della Terra Geoitalia 2013 ispartofbook:EPITOME 2013 - GEOITALIA 2013 - IX Forum Italiano di Scienze della Terra GEOITALIA 2013 - IX Forum Italiano di Scienze della Terra firstpage:"-" lastpage:"-" numberofpages:1 journal:EPITOME http://hdl.handle.net/10278/42754 info:eu-repo/semantics/closedAccess Antarctica geochemestry Holocene info:eu-repo/semantics/conferenceObject 2013 ftuniveneziairis 2024-01-03T17:45:28Z In the framework of national (PNRA) and international (ESF HOLOCLIP project - Holocene climate variability at high-Southern latitudes: an integrated perspective) projects, several marine cores were retrieved from the Antarctic continental margin, in the Indian sector of the Antarctic Ocean (CB2010 A, George V Basin; WEGA 26PC12, WEGA 17PC02, WEGA 11GC03, Wilkes Basin) and in the Western Ross Sea (cJ5, Joides Basin; c20, Cape Hallett; c43, Wood Bay). By using 210Pb activities measured at the EPOC (Univ. Bordeaux I) and 14C measurements (Univ. Trieste), a tentative age scale was achieved indicating that the temporal frame of the cores spans the last centuries (CB2010 A) to the whole Holocene (cJ5). Here we present the main results achieved from the chemical elemental analysis performed by ICP-AES technique on the above mentioned cores, in order to point out specific environmental features such as oxic and anoxic conditions, bioproductivity, lithogenic content of the sediments. Several major and trace elements were measured (Al, Ba, Be, Ca, Co, Cu, Dy, Eu, Fe, K, La, Mg, Mn, Mo, Na, Ni, Sc, Sr, Ti, V, Y, Yb, Zn), including some Rare Earth Elements and some relevant chemical paleomarkers such as Ba, Mo and Mn. At this purpose, a devoted method for sample mineralization was developed, consisting in an acidic (HF+HNO3+HCl) digestion in microwave oven, aiming to destroy the silicic as well as the organic matrix. Afterwards, the samples were treated with H3BO3, in order to neutralize possible remaining HF, whose presence is not recommended for ICP-AES measurements. The method performances were tested on certified marine sediment materials (MESS-3) showing recoveries always within the certified uncertainty. The obtained elemental stratigraphies allowed pointing out interesting environmental features. As an example, considering the cJ5 core, the trend of the Ba/Al concentration ratio and Baexcess content, still debated markers of paleoproductivity were shown to finely match the one of Fragilariopsis curta relative ... Conference Object Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Antarctic The Antarctic Ross Sea Indian Antarctic Ocean Dy ENVELOPE(11.369,11.369,64.834,64.834) Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Cape Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Wood Bay ENVELOPE(165.500,165.500,-74.217,-74.217) Joides Basin ENVELOPE(174.000,174.000,-74.500,-74.500) Wega ENVELOPE(144.000,144.000,-65.250,-65.250) |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Antarctica geochemestry Holocene |
spellingShingle |
Antarctica geochemestry Holocene R. Traversi D. Becagli E. Colizza G. Gori M. Marconi R. Melis K. Mezgec M. Severi R. Udisti STENNI, Barbara Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
topic_facet |
Antarctica geochemestry Holocene |
description |
In the framework of national (PNRA) and international (ESF HOLOCLIP project - Holocene climate variability at high-Southern latitudes: an integrated perspective) projects, several marine cores were retrieved from the Antarctic continental margin, in the Indian sector of the Antarctic Ocean (CB2010 A, George V Basin; WEGA 26PC12, WEGA 17PC02, WEGA 11GC03, Wilkes Basin) and in the Western Ross Sea (cJ5, Joides Basin; c20, Cape Hallett; c43, Wood Bay). By using 210Pb activities measured at the EPOC (Univ. Bordeaux I) and 14C measurements (Univ. Trieste), a tentative age scale was achieved indicating that the temporal frame of the cores spans the last centuries (CB2010 A) to the whole Holocene (cJ5). Here we present the main results achieved from the chemical elemental analysis performed by ICP-AES technique on the above mentioned cores, in order to point out specific environmental features such as oxic and anoxic conditions, bioproductivity, lithogenic content of the sediments. Several major and trace elements were measured (Al, Ba, Be, Ca, Co, Cu, Dy, Eu, Fe, K, La, Mg, Mn, Mo, Na, Ni, Sc, Sr, Ti, V, Y, Yb, Zn), including some Rare Earth Elements and some relevant chemical paleomarkers such as Ba, Mo and Mn. At this purpose, a devoted method for sample mineralization was developed, consisting in an acidic (HF+HNO3+HCl) digestion in microwave oven, aiming to destroy the silicic as well as the organic matrix. Afterwards, the samples were treated with H3BO3, in order to neutralize possible remaining HF, whose presence is not recommended for ICP-AES measurements. The method performances were tested on certified marine sediment materials (MESS-3) showing recoveries always within the certified uncertainty. The obtained elemental stratigraphies allowed pointing out interesting environmental features. As an example, considering the cJ5 core, the trend of the Ba/Al concentration ratio and Baexcess content, still debated markers of paleoproductivity were shown to finely match the one of Fragilariopsis curta relative ... |
author2 |
FIST-Federazione Italiana Scienze della Terra R., Traversi D., Becagli E., Colizza G., Gori M., Marconi R., Meli K., Mezgec M., Severi Stenni, Barbara R., Udisti |
format |
Conference Object |
author |
R. Traversi D. Becagli E. Colizza G. Gori M. Marconi R. Melis K. Mezgec M. Severi R. Udisti STENNI, Barbara |
author_facet |
R. Traversi D. Becagli E. Colizza G. Gori M. Marconi R. Melis K. Mezgec M. Severi R. Udisti STENNI, Barbara |
author_sort |
R. Traversi |
title |
Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
title_short |
Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
title_full |
Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
title_fullStr |
Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
title_full_unstemmed |
Reconstruction of environmental features by elemental stratigraphies of Antarctic marine sediments |
title_sort |
reconstruction of environmental features by elemental stratigraphies of antarctic marine sediments |
publisher |
FIST, Federazione Italiana di Scienze della Terra Geoitalia 2013 |
publishDate |
2013 |
url |
http://hdl.handle.net/10278/42754 |
long_lat |
ENVELOPE(11.369,11.369,64.834,64.834) ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(165.500,165.500,-74.217,-74.217) ENVELOPE(174.000,174.000,-74.500,-74.500) ENVELOPE(144.000,144.000,-65.250,-65.250) |
geographic |
Antarctic The Antarctic Ross Sea Indian Antarctic Ocean Dy Hallett Cape Hallett Wood Bay Joides Basin Wega |
geographic_facet |
Antarctic The Antarctic Ross Sea Indian Antarctic Ocean Dy Hallett Cape Hallett Wood Bay Joides Basin Wega |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Ross Sea |
op_relation |
ispartofbook:EPITOME 2013 - GEOITALIA 2013 - IX Forum Italiano di Scienze della Terra GEOITALIA 2013 - IX Forum Italiano di Scienze della Terra firstpage:"-" lastpage:"-" numberofpages:1 journal:EPITOME http://hdl.handle.net/10278/42754 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1789325502821957632 |