Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean
Numerous studies have shown that delta18O records from benthic and planktonic foraminifera, primarily a proxy of global ice volume variations, reflect Milankovitch periodicities. To study climatic response to orbital forcing at Ocean Drilling Program site 758, we have generated continuous delta18O a...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.696412 2023-05-15T18:01:11+02:00 Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean Chen, Jiajie Farrell, John W Murray, David W Prell, Warren L LATITUDE: 5.384067 * LONGITUDE: 90.361167 * DATE/TIME START: 1988-06-15T00:00:00 * DATE/TIME END: 1988-06-15T00:00:00 1995-06-30 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.696412 https://doi.org/10.1594/PANGAEA.696412 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.696412 https://doi.org/10.1594/PANGAEA.696412 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Chen, Jiajie; Farrell, John W; Murray, David W; Prell, Warren L (1995): Timescale and paleoceanographic implications of a 3.6 m.y. oxygen isotope record from the northeast Indian Ocean (Ocean Drilling Program Site 758). Paleoceanography, 10(1), 21-48, https://doi.org/10.1029/94PA02290 121-758 COMPCORE Composite Core Indian Ocean Joides Resolution Leg121 Ocean Drilling Program ODP Dataset 1995 ftpangaea https://doi.org/10.1594/PANGAEA.696412 https://doi.org/10.1029/94PA02290 2023-01-20T07:31:12Z Numerous studies have shown that delta18O records from benthic and planktonic foraminifera, primarily a proxy of global ice volume variations, reflect Milankovitch periodicities. To study climatic response to orbital forcing at Ocean Drilling Program site 758, we have generated continuous delta18O and delta13C records from a single benthic foraminiferal species Cibicides wuellerstorfi for the last 3.6 m.y. and extended the planktonic foraminiferal isotope records of Farrell and Janecek (1991, doi:10.2973/odp.proc.sr.121.124.1991) (0-2.5 Ma, based on Globigerinoides sacculifer) to 3.6 Ma (Chen, 1994). We then constructed an age model by matching, correlating and tuning the benthic delta18O record to a model simulation of ice volume (Imbrie and Imbrie, 1980, doi:10.1126/science.207.4434.943). The filtered 41- and 23-kyr signals based on the resultant astronomically tuned age model are highly correlated to obliquity (r=0.83) and precession (r=0.75), respectively. Although derived with methodology different from Shackleton et al. (1990) and Hilgen (1991, doi:10.1016/0012-821X(91)90206-W, 1991, doi:10.1016/0012-821X(91)90082-S), our results generally agree with their published astronomical timescales for the time interval from 0 to 3.0 Ma, providing additional support for the newly emerging chronology based on orbital tuning. Slight discrepancies exist in the time interval from 3.0 to 3.6 Ma, suggesting several possibilities, including differences in the approaches of orbital tuning and the relatively low amplitude of delta18O variations in our record. However, even if the discrepancies are due to the relatively low amplitude of the isotope signals in our record at 3.0-3.6 Ma, our resultant timescale as a whole does not adversely affect our evaluation of the paleoclimatology and paleoceanography of the Indian Ocean, such as the evolution of the 100-, 41- and 23-kyr cycles, and variation of global ice volume and deepwater temperature during the past 3.6 m.y. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Indian Shackleton ENVELOPE(90.361167,90.361167,5.384067,5.384067) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
121-758 COMPCORE Composite Core Indian Ocean Joides Resolution Leg121 Ocean Drilling Program ODP |
spellingShingle |
121-758 COMPCORE Composite Core Indian Ocean Joides Resolution Leg121 Ocean Drilling Program ODP Chen, Jiajie Farrell, John W Murray, David W Prell, Warren L Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
topic_facet |
121-758 COMPCORE Composite Core Indian Ocean Joides Resolution Leg121 Ocean Drilling Program ODP |
description |
Numerous studies have shown that delta18O records from benthic and planktonic foraminifera, primarily a proxy of global ice volume variations, reflect Milankovitch periodicities. To study climatic response to orbital forcing at Ocean Drilling Program site 758, we have generated continuous delta18O and delta13C records from a single benthic foraminiferal species Cibicides wuellerstorfi for the last 3.6 m.y. and extended the planktonic foraminiferal isotope records of Farrell and Janecek (1991, doi:10.2973/odp.proc.sr.121.124.1991) (0-2.5 Ma, based on Globigerinoides sacculifer) to 3.6 Ma (Chen, 1994). We then constructed an age model by matching, correlating and tuning the benthic delta18O record to a model simulation of ice volume (Imbrie and Imbrie, 1980, doi:10.1126/science.207.4434.943). The filtered 41- and 23-kyr signals based on the resultant astronomically tuned age model are highly correlated to obliquity (r=0.83) and precession (r=0.75), respectively. Although derived with methodology different from Shackleton et al. (1990) and Hilgen (1991, doi:10.1016/0012-821X(91)90206-W, 1991, doi:10.1016/0012-821X(91)90082-S), our results generally agree with their published astronomical timescales for the time interval from 0 to 3.0 Ma, providing additional support for the newly emerging chronology based on orbital tuning. Slight discrepancies exist in the time interval from 3.0 to 3.6 Ma, suggesting several possibilities, including differences in the approaches of orbital tuning and the relatively low amplitude of delta18O variations in our record. However, even if the discrepancies are due to the relatively low amplitude of the isotope signals in our record at 3.0-3.6 Ma, our resultant timescale as a whole does not adversely affect our evaluation of the paleoclimatology and paleoceanography of the Indian Ocean, such as the evolution of the 100-, 41- and 23-kyr cycles, and variation of global ice volume and deepwater temperature during the past 3.6 m.y. |
format |
Dataset |
author |
Chen, Jiajie Farrell, John W Murray, David W Prell, Warren L |
author_facet |
Chen, Jiajie Farrell, John W Murray, David W Prell, Warren L |
author_sort |
Chen, Jiajie |
title |
Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
title_short |
Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
title_full |
Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
title_fullStr |
Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
title_full_unstemmed |
Stable isotope record and age determination of ODP Site 121-758 in the northeastern Indian Ocean |
title_sort |
stable isotope record and age determination of odp site 121-758 in the northeastern indian ocean |
publisher |
PANGAEA |
publishDate |
1995 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.696412 https://doi.org/10.1594/PANGAEA.696412 |
op_coverage |
LATITUDE: 5.384067 * LONGITUDE: 90.361167 * DATE/TIME START: 1988-06-15T00:00:00 * DATE/TIME END: 1988-06-15T00:00:00 |
long_lat |
ENVELOPE(90.361167,90.361167,5.384067,5.384067) |
geographic |
Indian Shackleton |
geographic_facet |
Indian Shackleton |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Chen, Jiajie; Farrell, John W; Murray, David W; Prell, Warren L (1995): Timescale and paleoceanographic implications of a 3.6 m.y. oxygen isotope record from the northeast Indian Ocean (Ocean Drilling Program Site 758). Paleoceanography, 10(1), 21-48, https://doi.org/10.1029/94PA02290 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.696412 https://doi.org/10.1594/PANGAEA.696412 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.696412 https://doi.org/10.1029/94PA02290 |
_version_ |
1766170539814027264 |