Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Schmiedl, Gerhard; Mackensen, Andreas (2006): Stable oxygen isotope records of different benthic foraminiferal species of core GeoB3004-1 from the western Arabian Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.548185, Supplement to: Schmiedl, G; Mackensen, A (2006): Multispecies stable isotopes of benthic foraminifers reveal past changes of organic matter decomposition and deepwater oxygenation in the Arabian Sea. Paleoceanography, 21(4), PA4213, https://doi.org/10.1029/2006PA001284

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
The stable isotope composition of one epifaunal and three infaunal benthic foraminiferal species of a sediment core from 1800 m water depth of the western Arabian Sea was determined to evaluate deepwater oxygenation, organic matter remineralization, and early diagenetic processes during the past 190,000 years. The d18O records reveal species-specific metabolic effects, susceptibility to changes in carbonate ion concentration, and supralysoclinal calcite dissolution. The foraminiferal d13C records reveal changes in the stable carbon isotope gradients of pore water dissolved inorganic carbon (d13CDIC) and in the microhabitat depth of infaunal species. Maximum d13CDIC offsets between bottom and pore waters ranged between mean values of 0.8 and 1.2% corresponding to estimates of deepwater oxygen concentration between approximately 1 and 2.7 ml/l. Intervals of improved deepwater oxygenation coincided with high benthic foraminiferal diversity and indicate the admixture of well-oxygenated deepwater masses during interglacials. During interglacial maxima the d13C difference between epifauna and shallow infauna indicates highest organic matter remineralization rates at times of maximum organic matter fluxes.
Coverage:
Latitude: 14.605000 * Longitude: 52.920000
Date/Time Start: 1995-03-07T16:44:00 * Date/Time End: 1995-03-07T16:44:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 10.13 m
Event(s):
GeoB3004-1 (M31/3-107_GC) * Latitude: 14.605000 * Longitude: 52.920000 * Date/Time: 1995-03-07T16:44:00 * Elevation: -1803.0 m * Recovery: 10.28 m * Location: Gulf of Aden * Campaign: M31/3 (BIGSET) * Basis: Meteor (1986) * Device: Gravity corer (Kiel type) (SL) * Comment: Penetration until weight, CC:H2S, clay-ooze, oliv-green, foraminifers
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2AGEAgeka BPGeocode
3Cibicidoides wuellerstorfi, δ18OC. wuellerstorfi δ18O‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
4Cibicidoides wuellerstorfi, δ13CC. wuellerstorfi δ13C‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
5Melonis barleeanus, δ18OM. barleeanus δ18O‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
6Melonis barleeanus, δ13CM. barleeanus δ13C‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
7Uvigerina peregrina, δ18OU. peregrina δ18O‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
8Uvigerina peregrina, δ13CU. peregrina δ13C‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
9Globobulimina affinis, δ18OG. affinis δ18O‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
10Globobulimina affinis, δ13CG. affinis δ13C‰ PDBSchmiedl, GerhardMass spectrometer Finnigan MAT 251
Size:
1500 data points

Download Data

Download dataset as tab-delimited text (use the following character encoding: )

View dataset as HTML