Interstitial water chemistry, Deep Sea Drilling Project, Leg 96
On Leg 96 of the Deep Sea Drilling Project (DSDP), holes were drilled in Orca and Pigmy basins on the northern Gulf of Mexico continental slope and on the Mississippi Fan. The holes on the fan encountered interbedded sand, silt, and mud deposited extremely rapidly, most during late Wisconsin glacial...
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1986
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786678 2023-05-15T17:53:39+02:00 Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 Presley, Bob J Stearns, Steven MEDIAN LATITUDE: 26.200254 * MEDIAN LONGITUDE: -88.587204 * SOUTH-BOUND LATITUDE: 25.068000 * WEST-BOUND LONGITUDE: -91.409000 * NORTH-BOUND LATITUDE: 27.193500 * EAST-BOUND LONGITUDE: -85.992170 * DATE/TIME START: 1983-10-01T00:00:00 * DATE/TIME END: 1983-11-01T00:00:00 1986-07-31 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.786678 https://doi.org/10.1594/PANGAEA.786678 en eng PANGAEA Presley, Bob J; Stearns, Steven (1986): Interstitial water chemistry, Deep Sea Drilling Project, Leg 96. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 697-709, https://doi.org/10.2973/dsdp.proc.96.141.1986 https://doi.pangaea.de/10.1594/PANGAEA.786678 https://doi.org/10.1594/PANGAEA.786678 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Deep Sea Drilling Project DSDP Dataset 1986 ftpangaea https://doi.org/10.1594/PANGAEA.786678 https://doi.org/10.2973/dsdp.proc.96.141.1986 2023-01-20T07:32:38Z On Leg 96 of the Deep Sea Drilling Project (DSDP), holes were drilled in Orca and Pigmy basins on the northern Gulf of Mexico continental slope and on the Mississippi Fan. The holes on the fan encountered interbedded sand, silt, and mud deposited extremely rapidly, most during late Wisconsin glacial time. Pore-water chemistry in these holes is variable, but does not follow lithologic changes in any simple way. Both Ca and SO4 are enriched in the pore water of many samples from the fan. Two sites drilled in the prominent central channel of the middle fan show rapid SO4 reduction with depth, whereas two nearby sites in overbank deposits show no sulfate reduction for 300 m. Calcium concentration decreases as SO4 is depleted and Li follows the same pattern. Strontium, which like Li, is enriched in samples enriched in Ca, does not decrease with SO4 and Ca. Potassium in the pore water decreases with depth at almost all sites. Sulfate reduction was active at the two basin sites and, as on the fan, this resulted in calcium carbonate precipitation and a lowering of pore water Ca, Mg, and Li. The Orca Basin site was drilled through a brine pool of 258‰ salinity. Pore-water salinity decreases smoothly with depth to 50 m and remains well above normal seawater values to the bottom of the hole at about 90 m. This suggests constant sedimentation under anoxic hypersaline conditions for at least the last 50,000 yr. Dataset Orca PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-91.409000,-85.992170,27.193500,25.068000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP |
spellingShingle |
Deep Sea Drilling Project DSDP Presley, Bob J Stearns, Steven Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
topic_facet |
Deep Sea Drilling Project DSDP |
description |
On Leg 96 of the Deep Sea Drilling Project (DSDP), holes were drilled in Orca and Pigmy basins on the northern Gulf of Mexico continental slope and on the Mississippi Fan. The holes on the fan encountered interbedded sand, silt, and mud deposited extremely rapidly, most during late Wisconsin glacial time. Pore-water chemistry in these holes is variable, but does not follow lithologic changes in any simple way. Both Ca and SO4 are enriched in the pore water of many samples from the fan. Two sites drilled in the prominent central channel of the middle fan show rapid SO4 reduction with depth, whereas two nearby sites in overbank deposits show no sulfate reduction for 300 m. Calcium concentration decreases as SO4 is depleted and Li follows the same pattern. Strontium, which like Li, is enriched in samples enriched in Ca, does not decrease with SO4 and Ca. Potassium in the pore water decreases with depth at almost all sites. Sulfate reduction was active at the two basin sites and, as on the fan, this resulted in calcium carbonate precipitation and a lowering of pore water Ca, Mg, and Li. The Orca Basin site was drilled through a brine pool of 258‰ salinity. Pore-water salinity decreases smoothly with depth to 50 m and remains well above normal seawater values to the bottom of the hole at about 90 m. This suggests constant sedimentation under anoxic hypersaline conditions for at least the last 50,000 yr. |
format |
Dataset |
author |
Presley, Bob J Stearns, Steven |
author_facet |
Presley, Bob J Stearns, Steven |
author_sort |
Presley, Bob J |
title |
Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
title_short |
Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
title_full |
Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
title_fullStr |
Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
title_full_unstemmed |
Interstitial water chemistry, Deep Sea Drilling Project, Leg 96 |
title_sort |
interstitial water chemistry, deep sea drilling project, leg 96 |
publisher |
PANGAEA |
publishDate |
1986 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.786678 https://doi.org/10.1594/PANGAEA.786678 |
op_coverage |
MEDIAN LATITUDE: 26.200254 * MEDIAN LONGITUDE: -88.587204 * SOUTH-BOUND LATITUDE: 25.068000 * WEST-BOUND LONGITUDE: -91.409000 * NORTH-BOUND LATITUDE: 27.193500 * EAST-BOUND LONGITUDE: -85.992170 * DATE/TIME START: 1983-10-01T00:00:00 * DATE/TIME END: 1983-11-01T00:00:00 |
long_lat |
ENVELOPE(-91.409000,-85.992170,27.193500,25.068000) |
genre |
Orca |
genre_facet |
Orca |
op_relation |
Presley, Bob J; Stearns, Steven (1986): Interstitial water chemistry, Deep Sea Drilling Project, Leg 96. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 697-709, https://doi.org/10.2973/dsdp.proc.96.141.1986 https://doi.pangaea.de/10.1594/PANGAEA.786678 https://doi.org/10.1594/PANGAEA.786678 |
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.786678 https://doi.org/10.2973/dsdp.proc.96.141.1986 |
_version_ |
1766161358925070336 |