Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica
The compositional record of the AND-2A drillcore is examined using petrological, sedimentological, volcanological and geochemical analysis of clasts, sediments and pore waters. Preliminary investigations of basement clasts (granitoids and metasediments) indicate both local and distal sources corresp...
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Language: | English |
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2009
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Online Access: | http://hdl.handle.net/11365/8207 |
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ftunivsiena:oai:usiena-air.unisi.it:11365/8207 2024-04-14T08:04:37+00:00 Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica PANTER, K. S. TALARICO, F. M. BASSETT, K. DEL CARLO, P. FIELD, B. FRANK, T. HOFFMAN, S. KUHN, G REICHELT, L. SANDRONI, S. TAVIANI, M. BRACCIALI, L. CORNAMUSINI, G. VON EYNATTEN, H. ROCCHI, S. ANDRILL-SMS SCIENCE TEAM Panter, K. S. Talarico, F. M. Bassett, K. DEL CARLO, P. Field, B. Frank, T. Hoffman, S. Kuhn, G Reichelt, L. Sandroni, S. Taviani, M. Bracciali, L. Cornamusini, G. VON EYNATTEN, H. Rocchi, S. ANDRILL-SMS SCIENCE, Team 2009 STAMPA http://hdl.handle.net/11365/8207 eng eng volume:15 issue:1-2 firstpage:147 lastpage:192 numberofpages:46 journal:TERRA ANTARTICA http://hdl.handle.net/11365/8207 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-71849089310 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2009 ftunivsiena 2024-03-21T16:01:28Z The compositional record of the AND-2A drillcore is examined using petrological, sedimentological, volcanological and geochemical analysis of clasts, sediments and pore waters. Preliminary investigations of basement clasts (granitoids and metasediments) indicate both local and distal sources corresponding to variable ice-volume and ice-flow directions. Low abundance of sedimentary clasts (e.g., arkose, litharenite) suggests reduced contributions from sedimentary covers while intraclasts (e.g., diamictite, conglomerate) attest to intrabasinal reworking. Volcanic material includes pyroclasts (e.g., pumice, scoria), sediments and lava. Primary and reworked tephra layers occur within the Early Miocene interval (1093 to 640 metres below sea floor mbsf). The compositions of volcanic clasts reveal a diversity of alkaline types derived from the McMurdo Volcanic Group. Finer-grained sediments (e.g., sandstone, siltstone) show increases in biogenic silica and volcanic glass from 230 to 780 mbsf and higher proportions of terrigenous material c. 350 to 750 mbsf and below 970 mbsf. Basement clast assemblages suggest a dominant provenance from the Skelton Glacier - Darwin Glacier area and from the Ferrar Glacier - Koettlitz Glacier area. Provenance of sand grains is consistent with clast sources. Thirteen Geochemical Units are established based on compositional trends derived from continuous XRF scanning. High values of Fe and Ti indicate terrigenous and volcanic sources, whereas high Ca values signify either biogenic or diagenic sources. Highly alkaline and saline pore waters were produced by chemical exchange with glass at moderately elevated temperatures. Article in Journal/Newspaper Antarc* Antarctica Darwin Glacier Ferrar Glacier Koettlitz Glacier McMurdo Sound Skelton Glacier Università degli Studi di Siena: USiena air Darwin Glacier ENVELOPE(159.000,159.000,-79.883,-79.883) Ferrar Glacier ENVELOPE(163.000,163.000,-77.767,-77.767) Glacier Koettlitz ENVELOPE(164.250,164.250,-78.250,-78.250) Koettlitz Glacier ENVELOPE(164.250,164.250,-78.250,-78.250) McMurdo Sound Skelton Glacier ENVELOPE(161.500,161.500,-78.583,-78.583) |
institution |
Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
description |
The compositional record of the AND-2A drillcore is examined using petrological, sedimentological, volcanological and geochemical analysis of clasts, sediments and pore waters. Preliminary investigations of basement clasts (granitoids and metasediments) indicate both local and distal sources corresponding to variable ice-volume and ice-flow directions. Low abundance of sedimentary clasts (e.g., arkose, litharenite) suggests reduced contributions from sedimentary covers while intraclasts (e.g., diamictite, conglomerate) attest to intrabasinal reworking. Volcanic material includes pyroclasts (e.g., pumice, scoria), sediments and lava. Primary and reworked tephra layers occur within the Early Miocene interval (1093 to 640 metres below sea floor mbsf). The compositions of volcanic clasts reveal a diversity of alkaline types derived from the McMurdo Volcanic Group. Finer-grained sediments (e.g., sandstone, siltstone) show increases in biogenic silica and volcanic glass from 230 to 780 mbsf and higher proportions of terrigenous material c. 350 to 750 mbsf and below 970 mbsf. Basement clast assemblages suggest a dominant provenance from the Skelton Glacier - Darwin Glacier area and from the Ferrar Glacier - Koettlitz Glacier area. Provenance of sand grains is consistent with clast sources. Thirteen Geochemical Units are established based on compositional trends derived from continuous XRF scanning. High values of Fe and Ti indicate terrigenous and volcanic sources, whereas high Ca values signify either biogenic or diagenic sources. Highly alkaline and saline pore waters were produced by chemical exchange with glass at moderately elevated temperatures. |
author2 |
Panter, K. S. Talarico, F. M. Bassett, K. DEL CARLO, P. Field, B. Frank, T. Hoffman, S. Kuhn, G Reichelt, L. Sandroni, S. Taviani, M. Bracciali, L. Cornamusini, G. VON EYNATTEN, H. Rocchi, S. ANDRILL-SMS SCIENCE, Team |
format |
Article in Journal/Newspaper |
author |
PANTER, K. S. TALARICO, F. M. BASSETT, K. DEL CARLO, P. FIELD, B. FRANK, T. HOFFMAN, S. KUHN, G REICHELT, L. SANDRONI, S. TAVIANI, M. BRACCIALI, L. CORNAMUSINI, G. VON EYNATTEN, H. ROCCHI, S. ANDRILL-SMS SCIENCE TEAM |
spellingShingle |
PANTER, K. S. TALARICO, F. M. BASSETT, K. DEL CARLO, P. FIELD, B. FRANK, T. HOFFMAN, S. KUHN, G REICHELT, L. SANDRONI, S. TAVIANI, M. BRACCIALI, L. CORNAMUSINI, G. VON EYNATTEN, H. ROCCHI, S. ANDRILL-SMS SCIENCE TEAM Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
author_facet |
PANTER, K. S. TALARICO, F. M. BASSETT, K. DEL CARLO, P. FIELD, B. FRANK, T. HOFFMAN, S. KUHN, G REICHELT, L. SANDRONI, S. TAVIANI, M. BRACCIALI, L. CORNAMUSINI, G. VON EYNATTEN, H. ROCCHI, S. ANDRILL-SMS SCIENCE TEAM |
author_sort |
PANTER, K. S. |
title |
Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_short |
Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full |
Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_fullStr |
Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full_unstemmed |
Petrologic and geochemical composition of the AND-2A core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_sort |
petrologic and geochemical composition of the and-2a core, andrill southern mcmurdo sound project, antarctica |
publishDate |
2009 |
url |
http://hdl.handle.net/11365/8207 |
long_lat |
ENVELOPE(159.000,159.000,-79.883,-79.883) ENVELOPE(163.000,163.000,-77.767,-77.767) ENVELOPE(164.250,164.250,-78.250,-78.250) ENVELOPE(164.250,164.250,-78.250,-78.250) ENVELOPE(161.500,161.500,-78.583,-78.583) |
geographic |
Darwin Glacier Ferrar Glacier Glacier Koettlitz Koettlitz Glacier McMurdo Sound Skelton Glacier |
geographic_facet |
Darwin Glacier Ferrar Glacier Glacier Koettlitz Koettlitz Glacier McMurdo Sound Skelton Glacier |
genre |
Antarc* Antarctica Darwin Glacier Ferrar Glacier Koettlitz Glacier McMurdo Sound Skelton Glacier |
genre_facet |
Antarc* Antarctica Darwin Glacier Ferrar Glacier Koettlitz Glacier McMurdo Sound Skelton Glacier |
op_relation |
volume:15 issue:1-2 firstpage:147 lastpage:192 numberofpages:46 journal:TERRA ANTARTICA http://hdl.handle.net/11365/8207 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-71849089310 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1796301261028458496 |