Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1)
Site 723 is located in a water depth of 808 m at the center of the oxygen minimum zone and the middle part of the main thermocline on the Oman Margin. Oxygen isotope curves of planktonic delta18OP and benthic delta18OB can be traced back continuously to Stage 23 with high resolution measurements. A...
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1991
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.695216 2024-09-09T20:04:12+00:00 Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) Niitsuma, Nobuaki Oba, Tadamichi Okada, Makoto LATITUDE: 18.051800 * LONGITUDE: 57.608700 * DATE/TIME START: 1987-09-15T00:00:00 * DATE/TIME END: 1987-09-20T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.07 m * MAXIMUM DEPTH, sediment/rock: 381.41 m 1991 text/tab-separated-values, 3941 data points https://doi.pangaea.de/10.1594/PANGAEA.695216 https://doi.org/10.1594/PANGAEA.695216 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.695216 https://doi.org/10.1594/PANGAEA.695216 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Niitsuma, Nobuaki; Oba, Tadamichi; Okada, Makoto (1991): Oxygen and carbon isotope stratigraphy at Site 723, Oman Margin. In: Prell, W.L., Niitsuma, N., et al. (1991), Proceedings of the Ocean Drilling Program, Scientific Result, Colege Station, TX, 117, 321-341, https://doi.org/10.2973/odp.proc.sr.117.168.1991 117-723 Ageprofile Datum Description Arabian Sea Comment COMPCORE Composite Core DEPTH sediment/rock DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg117 Marine isotopic stage Ocean Drilling Program ODP Pulleniatina obliquiloculata δ13C δ18O Sample code/label Uvigerina excellens dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.69521610.2973/odp.proc.sr.117.168.1991 2024-07-30T23:42:28Z Site 723 is located in a water depth of 808 m at the center of the oxygen minimum zone and the middle part of the main thermocline on the Oman Margin. Oxygen isotope curves of planktonic delta18OP and benthic delta18OB can be traced back continuously to Stage 23 with high resolution measurements. A tentative correlation to Stage 53 has been tried using oxygen isotope stratigraphy. The amplitudes of the fluctuations of the benthic delta18OB curve are small, compared with the planktonic delta18OP curve. The delays of benthic oxygen isotopes delta18OB related to the planktonic delta18OP appear in the transgressive stages. Carbon isotopes of benthic delta13CB and planktonic delta13CP generally show an inverse correlation with oxygen isotope values delta18OB and delta18OB and delta18OP, however, the changes of delta13C are more gradual than those of delta18O during transgressive stages in spite of the synchronized changes of delta13C with those of delta18O during regressive stages. The difference of oxygen isotope between benthic and planktonic foraminifers represents the degree of pushing up the thermocline by upwelling, and the difference of carbon isotope represents the relative amount of upwelling Sigma[CO2] to the biological uptake in the surface water. These isotopic differences can be used as indicators of upwelling and show strong upwelling in the interglacial and weak upwelling in the glacial stages. The organic carbon content is correlated with the isotopic upwelling indicators, and higher content is correlated with the isotopic upwelling indicators and higher content appears in the interglacial stages. The calculated rate of sedimentation based on oxygen isotope stratigraphy in glacial stages is significantly high, two to four times that of interglacial stages, and the absolute flux of fluvial sediments with variability of lithofacies increased in the glacial stage. The present glacial-interglacial cycle with the fluctuation of upwelling relating to the southwest monsoon can be traced back to Stage 8, 250 ... Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(57.608700,57.608700,18.051800,18.051800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
117-723 Ageprofile Datum Description Arabian Sea Comment COMPCORE Composite Core DEPTH sediment/rock DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg117 Marine isotopic stage Ocean Drilling Program ODP Pulleniatina obliquiloculata δ13C δ18O Sample code/label Uvigerina excellens |
spellingShingle |
117-723 Ageprofile Datum Description Arabian Sea Comment COMPCORE Composite Core DEPTH sediment/rock DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg117 Marine isotopic stage Ocean Drilling Program ODP Pulleniatina obliquiloculata δ13C δ18O Sample code/label Uvigerina excellens Niitsuma, Nobuaki Oba, Tadamichi Okada, Makoto Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
topic_facet |
117-723 Ageprofile Datum Description Arabian Sea Comment COMPCORE Composite Core DEPTH sediment/rock DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg117 Marine isotopic stage Ocean Drilling Program ODP Pulleniatina obliquiloculata δ13C δ18O Sample code/label Uvigerina excellens |
description |
Site 723 is located in a water depth of 808 m at the center of the oxygen minimum zone and the middle part of the main thermocline on the Oman Margin. Oxygen isotope curves of planktonic delta18OP and benthic delta18OB can be traced back continuously to Stage 23 with high resolution measurements. A tentative correlation to Stage 53 has been tried using oxygen isotope stratigraphy. The amplitudes of the fluctuations of the benthic delta18OB curve are small, compared with the planktonic delta18OP curve. The delays of benthic oxygen isotopes delta18OB related to the planktonic delta18OP appear in the transgressive stages. Carbon isotopes of benthic delta13CB and planktonic delta13CP generally show an inverse correlation with oxygen isotope values delta18OB and delta18OB and delta18OP, however, the changes of delta13C are more gradual than those of delta18O during transgressive stages in spite of the synchronized changes of delta13C with those of delta18O during regressive stages. The difference of oxygen isotope between benthic and planktonic foraminifers represents the degree of pushing up the thermocline by upwelling, and the difference of carbon isotope represents the relative amount of upwelling Sigma[CO2] to the biological uptake in the surface water. These isotopic differences can be used as indicators of upwelling and show strong upwelling in the interglacial and weak upwelling in the glacial stages. The organic carbon content is correlated with the isotopic upwelling indicators, and higher content is correlated with the isotopic upwelling indicators and higher content appears in the interglacial stages. The calculated rate of sedimentation based on oxygen isotope stratigraphy in glacial stages is significantly high, two to four times that of interglacial stages, and the absolute flux of fluvial sediments with variability of lithofacies increased in the glacial stage. The present glacial-interglacial cycle with the fluctuation of upwelling relating to the southwest monsoon can be traced back to Stage 8, 250 ... |
format |
Dataset |
author |
Niitsuma, Nobuaki Oba, Tadamichi Okada, Makoto |
author_facet |
Niitsuma, Nobuaki Oba, Tadamichi Okada, Makoto |
author_sort |
Niitsuma, Nobuaki |
title |
Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
title_short |
Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
title_full |
Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
title_fullStr |
Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
title_full_unstemmed |
Stable oxygen and carbon isotope ratios of the planktonic foraminifera Pulleniatina obliquiloculata and the benthic foraminifera Uvigerina excellens of ODP Site 117-723 in the Arabian Sea (Table 1) |
title_sort |
stable oxygen and carbon isotope ratios of the planktonic foraminifera pulleniatina obliquiloculata and the benthic foraminifera uvigerina excellens of odp site 117-723 in the arabian sea (table 1) |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.695216 https://doi.org/10.1594/PANGAEA.695216 |
op_coverage |
LATITUDE: 18.051800 * LONGITUDE: 57.608700 * DATE/TIME START: 1987-09-15T00:00:00 * DATE/TIME END: 1987-09-20T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.07 m * MAXIMUM DEPTH, sediment/rock: 381.41 m |
long_lat |
ENVELOPE(57.608700,57.608700,18.051800,18.051800) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Niitsuma, Nobuaki; Oba, Tadamichi; Okada, Makoto (1991): Oxygen and carbon isotope stratigraphy at Site 723, Oman Margin. In: Prell, W.L., Niitsuma, N., et al. (1991), Proceedings of the Ocean Drilling Program, Scientific Result, Colege Station, TX, 117, 321-341, https://doi.org/10.2973/odp.proc.sr.117.168.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.695216 https://doi.org/10.1594/PANGAEA.695216 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.69521610.2973/odp.proc.sr.117.168.1991 |
_version_ |
1809936293540397056 |