Stable oxygen isotope records of different benthic foraminiferal species of core GeoB3004-1 from the western Arabian Sea
Fuente:
PANGAEA
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2006
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867168866646360064 |
|---|---|
| author | Schmiedl, Gerhard Mackensen, Andreas |
| author_facet | Schmiedl, Gerhard Mackensen, Andreas |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_548185 |
| institution | PANGAEA |
| language | en |
| publishDate | 2006 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable oxygen isotope records of different benthic foraminiferal species of core GeoB3004-1 from the western Arabian Sea Schmiedl, Gerhard Mackensen, Andreas AGE; AWI_Paleo; BIGSET; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; DEPTH, sediment/rock; GeoB3004-1; Globobulimina affinis, δ13C; Globobulimina affinis, δ18O; Gravity corer (Kiel type); Gulf of Aden; M31/3; M31/3-107_GC; Mass spectrometer Finnigan MAT 251; Melonis barleeanus, δ13C; Melonis barleeanus, δ18O; Meteor (1986); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; SL; Uvigerina peregrina, δ13C; Uvigerina peregrina, δ18O 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. |
| title | Stable oxygen isotope records of different benthic foraminiferal species of core GeoB3004-1 from the western Arabian Sea |
| topic | AGE; AWI_Paleo; BIGSET; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; DEPTH, sediment/rock; GeoB3004-1; Globobulimina affinis, δ13C; Globobulimina affinis, δ18O; Gravity corer (Kiel type); Gulf of Aden; M31/3; M31/3-107_GC; Mass spectrometer Finnigan MAT 251; Melonis barleeanus, δ13C; Melonis barleeanus, δ18O; Meteor (1986); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; SL; Uvigerina peregrina, δ13C; Uvigerina peregrina, δ18O |
| url | https://doi.org/10.1594/PANGAEA.548185 |