A COMPARISON OF BENTHIC FORAMINIFERAL PAL EOPRODUCTIVITY PROXIES IN ASEDIMENT CORE FROM THE NW AFRICA UPWELLING AREA

Authors
GUICHARD S JORISSEN F BERTRAND P GERVAIS A MARTINEZ P PEYPOUQUET JP PUJOL C VERGNAUDGRAZZINI C
Citation
S. Guichard et al., A COMPARISON OF BENTHIC FORAMINIFERAL PAL EOPRODUCTIVITY PROXIES IN ASEDIMENT CORE FROM THE NW AFRICA UPWELLING AREA, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 325(1), 1997, pp. 65-70
Citations number
16
Categorie Soggetti
Geosciences, Interdisciplinary
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
1
Year of publication
1997
Pages
65 - 70
Database
ISI
SICI code
1251-8050(1997)325:1<65:ACOBFP>2.0.ZU;2-0
Abstract
Two different paleoproductivity Proxies, both based on benthic foramin iferal frequency data, are tested in a sediment core from the NW Afric an upwelling area. A first proxy, the BFAR, enables us to estimate the total amount of organic matter introduced into the benthic ecosystem. The second one, the sample scores on the first axis of a P.C.A., enab les us to estimate export-paleoproductivity when the oxygen concentrat ion does not exceed 4.4 mL/L. The comparison gf these micropaleontolog ical proxies also allows us to evaluate the quality of the organic mat ter, and thus, to estimate what part of the organic matter introduced in the benthic ecosystem has been remineralized, and what part has ult imately been stored in the sediment.