Age determination and sedimentation rates of ODP Hole 119-740A (Table 1)
Unconsolidated sediments recovered at Site 740 include approximately 23 m of interbedded siliceous ooze and silty clay (pebbly mud), which was tentatively assigned a late Pliocene to Quaternary age by shipboard scientists. In order to clarify the chronology of this sequence, six samples of siliceous...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758213 2023-05-15T18:03:41+02:00 Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) Domack, Eugene W Jull, A J Timothy Donahue, Douglas J LATITUDE: -68.764000 * LONGITUDE: 76.681900 * DATE/TIME START: 1988-01-23T18:30:00 * DATE/TIME END: 1988-01-27T13:15:00 * MINIMUM DEPTH, sediment/rock: 0.235 m * MAXIMUM DEPTH, sediment/rock: 15.820 m 1991-03-11 text/tab-separated-values, 45 data points https://doi.pangaea.de/10.1594/PANGAEA.758213 https://doi.org/10.1594/PANGAEA.758213 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758213 https://doi.org/10.1594/PANGAEA.758213 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Domack, Eugene W; Jull, A J Timothy; Donahue, Douglas J (1991): Holocene chronology for the unconsolidated sediments at Hole 740A: Prydz Bay, East Antarctica. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 747-751, https://doi.org/10.2973/odp.proc.sr.119.207.1991 119-740A Age 14C AMS dated Calculated Chaetoceros cinctus Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Flow rate Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Sample code/label Sample code/label 2 Sedimentation rate per year Dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.758213 https://doi.org/10.2973/odp.proc.sr.119.207.1991 2023-01-20T08:52:02Z Unconsolidated sediments recovered at Site 740 include approximately 23 m of interbedded siliceous ooze and silty clay (pebbly mud), which was tentatively assigned a late Pliocene to Quaternary age by shipboard scientists. In order to clarify the chronology of this sequence, six samples of siliceous ooze were analyzed for their 14C content using the University of Arizona Tandem Accelerator Mass-Spectrometer (TAMS) facility. Uncorrected ages ranged from 1915 ± 50 yr B.P. (0.21 mbsf) to 11,140 ± 75 yr B.P. (15.80 mbsf). These ages provide estimates for interval sedimentation rates of the siliceous ooze, which varied from 0.150 to 0.067 cm/yr. A reservoir correction of 1750 yr is used to determine absolute ages for the sample intervals. These dates ranged from 165 to 9390 14C yr B.P. Overall sediment-accumulation rates vary from 0.144 to 0.187 cm/yr, with maximum rates associated with the pebbly muds rather than the siliceous oozes. Extrapolated sedimentation rates and reservoir corrections allow for an age estimate of about 10,700 yr B.P. for the initiation of open-marine conditions at Site 740. Resumption of terrigenous sedimentation, with increased ice rafting, took place from approximately 7300 to 3800 yr B.P. This may have been related to the readvance of floating ice tongues along the eastern side of Prydz Bay. Open-marine conditions with seasonal sea ice have apparently been in existence near Site 740 for approximately the last 3800 yr. Dataset Prydz Bay Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Prydz Bay ENVELOPE(76.681900,76.681900,-68.764000,-68.764000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
119-740A Age 14C AMS dated Calculated Chaetoceros cinctus Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Flow rate Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Sample code/label Sample code/label 2 Sedimentation rate per year |
spellingShingle |
119-740A Age 14C AMS dated Calculated Chaetoceros cinctus Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Flow rate Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Sample code/label Sample code/label 2 Sedimentation rate per year Domack, Eugene W Jull, A J Timothy Donahue, Douglas J Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
topic_facet |
119-740A Age 14C AMS dated Calculated Chaetoceros cinctus Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Flow rate Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Sample code/label Sample code/label 2 Sedimentation rate per year |
description |
Unconsolidated sediments recovered at Site 740 include approximately 23 m of interbedded siliceous ooze and silty clay (pebbly mud), which was tentatively assigned a late Pliocene to Quaternary age by shipboard scientists. In order to clarify the chronology of this sequence, six samples of siliceous ooze were analyzed for their 14C content using the University of Arizona Tandem Accelerator Mass-Spectrometer (TAMS) facility. Uncorrected ages ranged from 1915 ± 50 yr B.P. (0.21 mbsf) to 11,140 ± 75 yr B.P. (15.80 mbsf). These ages provide estimates for interval sedimentation rates of the siliceous ooze, which varied from 0.150 to 0.067 cm/yr. A reservoir correction of 1750 yr is used to determine absolute ages for the sample intervals. These dates ranged from 165 to 9390 14C yr B.P. Overall sediment-accumulation rates vary from 0.144 to 0.187 cm/yr, with maximum rates associated with the pebbly muds rather than the siliceous oozes. Extrapolated sedimentation rates and reservoir corrections allow for an age estimate of about 10,700 yr B.P. for the initiation of open-marine conditions at Site 740. Resumption of terrigenous sedimentation, with increased ice rafting, took place from approximately 7300 to 3800 yr B.P. This may have been related to the readvance of floating ice tongues along the eastern side of Prydz Bay. Open-marine conditions with seasonal sea ice have apparently been in existence near Site 740 for approximately the last 3800 yr. |
format |
Dataset |
author |
Domack, Eugene W Jull, A J Timothy Donahue, Douglas J |
author_facet |
Domack, Eugene W Jull, A J Timothy Donahue, Douglas J |
author_sort |
Domack, Eugene W |
title |
Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
title_short |
Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
title_full |
Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
title_fullStr |
Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
title_full_unstemmed |
Age determination and sedimentation rates of ODP Hole 119-740A (Table 1) |
title_sort |
age determination and sedimentation rates of odp hole 119-740a (table 1) |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758213 https://doi.org/10.1594/PANGAEA.758213 |
op_coverage |
LATITUDE: -68.764000 * LONGITUDE: 76.681900 * DATE/TIME START: 1988-01-23T18:30:00 * DATE/TIME END: 1988-01-27T13:15:00 * MINIMUM DEPTH, sediment/rock: 0.235 m * MAXIMUM DEPTH, sediment/rock: 15.820 m |
long_lat |
ENVELOPE(76.681900,76.681900,-68.764000,-68.764000) |
geographic |
Prydz Bay |
geographic_facet |
Prydz Bay |
genre |
Prydz Bay Sea ice |
genre_facet |
Prydz Bay Sea ice |
op_source |
Supplement to: Domack, Eugene W; Jull, A J Timothy; Donahue, Douglas J (1991): Holocene chronology for the unconsolidated sediments at Hole 740A: Prydz Bay, East Antarctica. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 747-751, https://doi.org/10.2973/odp.proc.sr.119.207.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758213 https://doi.org/10.1594/PANGAEA.758213 |
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.758213 https://doi.org/10.2973/odp.proc.sr.119.207.1991 |
_version_ |
1766174672716562432 |