SR CA AND DELTA-O-18 RATIOS MEASURED FROM ACROPORA-NOBILIS AND PORITES LUTEA - IS SR/CA PALEOTHERMOMETRY ALWAYS RELIABLE/

Authors
BOISEAU M CORNU H TURPIN L JUILLETLECLERC A
Citation
M. Boiseau et al., SR CA AND DELTA-O-18 RATIOS MEASURED FROM ACROPORA-NOBILIS AND PORITES LUTEA - IS SR/CA PALEOTHERMOMETRY ALWAYS RELIABLE/, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 325(10), 1997, pp. 747-752
Citations number
16
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
325
Issue
10
Year of publication
1997
Pages
747 - 752
Database
ISI
SICI code
1251-8050(1997)325:10<747:SCADRM>2.0.ZU;2-N
Abstract
We measured the Sr/Ca and O-18/O-16 ratios in Acropora nobilis and Por ites lutea, from the Mayotte lagoon. As the variations of delta(18)O(s eawater) are negligible, coral delta(18)O(aragonite) reflects only sea sonal temperature variations. While there is a good agreement between the Sr/Ca ratio and delta(18)O for Acropora nobilis, it is not the cas e for Porites lutea. Coral biological and environmental parameters can not explain the discrepancies between Sr/Ca ratios and isotopic measur ements. However, transport mechanisms of Sr2+ and Ca2+ and the presenc e of two mineralogical structures of strontium may affect the Sr/Ca ra tio.