Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).

Seventy-six samples of calcium carbonate from shells and skeletons of fossil marine. organisms collected in the area of Terra Nova Bay (Victoria Land, Antarctica) have been measured for their 13C/12C and 180 /160 ratios. Solitary corals have been measured along with bryozoans, cirripeds, serpulids a...

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Main Authors: BARONI, CARLO, STENNI B, LONGINELLI A.
Other Authors: Baroni, Carlo, Stenni, B, Longinelli, A.
Format: Article in Journal/Newspaper
Language:English
Published: 1991
Subjects:
Online Access:http://hdl.handle.net/11568/20429
http://www.socgeol.info/Ricerca/pubblicazioni.asp?act=see&type=Memorie&y=1991&v=46&f=
id ftunivpisairis:oai:arpi.unipi.it:11568/20429
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spelling ftunivpisairis:oai:arpi.unipi.it:11568/20429 2024-01-28T10:00:34+01:00 Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica). BARONI, CARLO STENNI B LONGINELLI A. Baroni, Carlo Stenni, B Longinelli, A. 1991 STAMPA http://hdl.handle.net/11568/20429 http://www.socgeol.info/Ricerca/pubblicazioni.asp?act=see&type=Memorie&y=1991&v=46&f= eng eng volume:46 firstpage:93 lastpage:102 numberofpages:10 journal:MEMORIE DELLA SOCIETA' GEOLOGICA ITALIANA http://hdl.handle.net/11568/20429 http://www.socgeol.info/Ricerca/pubblicazioni.asp?act=see&type=Memorie&y=1991&v=46&f= isotopic composition Marine shell Paleoenvironment Holocene Victoria Land Antarctica info:eu-repo/semantics/article 1991 ftunivpisairis 2024-01-03T17:43:03Z Seventy-six samples of calcium carbonate from shells and skeletons of fossil marine. organisms collected in the area of Terra Nova Bay (Victoria Land, Antarctica) have been measured for their 13C/12C and 180 /160 ratios. Solitary corals have been measured along with bryozoans, cirripeds, serpulids and pelecypods coming from fossil beaches, supraglacial debris and dirt cones. Age determinations have been carried out by means of 14C measurements. The isotopic results obtained may be summarized as follows: the measurements carried out on corals agree well with previous measurements clearly indicating that these organisms do not precipitate the CaC03 of their skeleton under isotopic equilibrium conditions with environmental water. The 0 180 (COi-) are probably shifted by a constant value when compared with the 0180(~Oi-) values at equilibrium. The isotopic results obtained from bryozoans do not agree with the data reported in the literature. Our specimens show <S180 values away from isotopic equilibrium condition and <S13Cvalues very close to those of "normal" marine carbonate. Four different species of pelecypods have been studied, their age ranging from recent to about 7000 years B.P. In the case of Adamussium colbecki, there seems to be: a; relationship between age and 8180 (C0 32-), older specimens yielding more negative < 5 180 values. The isotopic values obtained from cirripeds suggest similar conclusions. Finally, both the oxygen and, carbon isotopic values of serpulids are not very far from equilibrium conditions. The main interest of these preliminary data is represented by the possibility of detecting relatively. small climatic changes even under these extreme conditions and by the possibility of obtaining information on the biological behaviour of various marine organisms living in this peculiar environment. Article in Journal/Newspaper Antarc* Antarctica Ice Shelves Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Terra Nova Bay Victoria Land
institution Open Polar
collection ARPI - Archivio della Ricerca dell'Università di Pisa
op_collection_id ftunivpisairis
language English
topic isotopic composition
Marine shell
Paleoenvironment
Holocene
Victoria Land
Antarctica
spellingShingle isotopic composition
Marine shell
Paleoenvironment
Holocene
Victoria Land
Antarctica
BARONI, CARLO
STENNI B
LONGINELLI A.
Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
topic_facet isotopic composition
Marine shell
Paleoenvironment
Holocene
Victoria Land
Antarctica
description Seventy-six samples of calcium carbonate from shells and skeletons of fossil marine. organisms collected in the area of Terra Nova Bay (Victoria Land, Antarctica) have been measured for their 13C/12C and 180 /160 ratios. Solitary corals have been measured along with bryozoans, cirripeds, serpulids and pelecypods coming from fossil beaches, supraglacial debris and dirt cones. Age determinations have been carried out by means of 14C measurements. The isotopic results obtained may be summarized as follows: the measurements carried out on corals agree well with previous measurements clearly indicating that these organisms do not precipitate the CaC03 of their skeleton under isotopic equilibrium conditions with environmental water. The 0 180 (COi-) are probably shifted by a constant value when compared with the 0180(~Oi-) values at equilibrium. The isotopic results obtained from bryozoans do not agree with the data reported in the literature. Our specimens show <S180 values away from isotopic equilibrium condition and <S13Cvalues very close to those of "normal" marine carbonate. Four different species of pelecypods have been studied, their age ranging from recent to about 7000 years B.P. In the case of Adamussium colbecki, there seems to be: a; relationship between age and 8180 (C0 32-), older specimens yielding more negative < 5 180 values. The isotopic values obtained from cirripeds suggest similar conclusions. Finally, both the oxygen and, carbon isotopic values of serpulids are not very far from equilibrium conditions. The main interest of these preliminary data is represented by the possibility of detecting relatively. small climatic changes even under these extreme conditions and by the possibility of obtaining information on the biological behaviour of various marine organisms living in this peculiar environment.
author2 Baroni, Carlo
Stenni, B
Longinelli, A.
format Article in Journal/Newspaper
author BARONI, CARLO
STENNI B
LONGINELLI A.
author_facet BARONI, CARLO
STENNI B
LONGINELLI A.
author_sort BARONI, CARLO
title Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
title_short Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
title_full Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
title_fullStr Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
title_full_unstemmed Isotopic composition of Holocene shells from raised beaches and ice shelves at Terra Nova Bay (Northern Victoria Land, Antarctica).
title_sort isotopic composition of holocene shells from raised beaches and ice shelves at terra nova bay (northern victoria land, antarctica).
publishDate 1991
url http://hdl.handle.net/11568/20429
http://www.socgeol.info/Ricerca/pubblicazioni.asp?act=see&type=Memorie&y=1991&v=46&f=
geographic Terra Nova Bay
Victoria Land
geographic_facet Terra Nova Bay
Victoria Land
genre Antarc*
Antarctica
Ice Shelves
Victoria Land
genre_facet Antarc*
Antarctica
Ice Shelves
Victoria Land
op_relation volume:46
firstpage:93
lastpage:102
numberofpages:10
journal:MEMORIE DELLA SOCIETA' GEOLOGICA ITALIANA
http://hdl.handle.net/11568/20429
http://www.socgeol.info/Ricerca/pubblicazioni.asp?act=see&type=Memorie&y=1991&v=46&f=
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