Amino acid racemization for several DSDP samples (Table 1)
Kinetic parameters for the epimerization of isoleucine in multispecific foraminiferal asemblages were used to establish the effects of burial depth and the geothermal gradient on the extent of reaction. It was observed that with a little as thirty meters of burial in a normal thermal regime there we...
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1983
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.757460 2023-05-15T17:35:57+02:00 Amino acid racemization for several DSDP samples (Table 1) Katz, Barry J Harrison, Christopher G A Man, Eugene H MEDIAN LATITUDE: 8.557133 * MEDIAN LONGITUDE: 12.541689 * SOUTH-BOUND LATITUDE: -30.889700 * WEST-BOUND LONGITUDE: -95.737500 * NORTH-BOUND LATITUDE: 59.933300 * EAST-BOUND LONGITUDE: 123.846300 * DATE/TIME START: 1968-12-24T00:00:00 * DATE/TIME END: 1975-05-11T00:00:00 * MINIMUM ELEVATION: -3927.0 m * MAXIMUM ELEVATION: -1795.0 m 1983-02-18 text/tab-separated-values, 67 data points https://doi.pangaea.de/10.1594/PANGAEA.757460 https://doi.org/10.1594/PANGAEA.757460 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.757460 https://doi.org/10.1594/PANGAEA.757460 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Katz, Barry J; Harrison, Christopher G A; Man, Eugene H (1983): Geothermal and other effects on amino acid racemization in selected Deep-Sea Drilling Project cores. Organic Geochemistry, 5(3), 151-156, https://doi.org/10.1016/0146-6380(83)90025-6 12-114 23-227 24-238 27-262 3-15 3-16 42-372 42-376 9-83A AGE Alloisoleucine/leucine ratio Calculated Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Epimerization extent Event label Glomar Challenger Indian Ocean//FRACTURE ZONE Indian Ocean//TROUGH Indian Ocean/Red Sea/TROUGH Leg12 Leg23 Leg24 Leg27 Leg3 Leg42 Leg9 Mediterranean Sea/BASIN North Atlantic/RIDGE North Pacific Sample code/label South Atlantic/HILL Dataset 1983 ftpangaea https://doi.org/10.1594/PANGAEA.757460 https://doi.org/10.1016/0146-6380(83)90025-6 2023-01-20T08:51:58Z Kinetic parameters for the epimerization of isoleucine in multispecific foraminiferal asemblages were used to establish the effects of burial depth and the geothermal gradient on the extent of reaction. It was observed that with a little as thirty meters of burial in a normal thermal regime there were differences between the extent of epimerization measured and that which would have been predicted for thermal equilibrium with bottom water temperatures. As would be expected, these differences are greatest when the heat flow (the geothermal gradient) and/or the sedimentation rates are highest. These effects were observed in most of the DSDP samples studied, and have been used to estimate the average heat flux since the time of sample deposition. Occasional anomalous effects were observed which could not be related to past or present heat flux. These were determined to be due to such geologic occurrences as slumping and reworking or to recent sample contamination. Other problems emerged related to bottom water temperatures including changes over geologic time which are unknown and could not be deduced. Thus, the presence of epimerization anomalies in DSDP cores as noted above limits the effectiveness of amino acid geochronology in such cores, unless these anomalies can be recognized as ab initio. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Indian Pacific ENVELOPE(-95.737500,123.846300,59.933300,-30.889700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
12-114 23-227 24-238 27-262 3-15 3-16 42-372 42-376 9-83A AGE Alloisoleucine/leucine ratio Calculated Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Epimerization extent Event label Glomar Challenger Indian Ocean//FRACTURE ZONE Indian Ocean//TROUGH Indian Ocean/Red Sea/TROUGH Leg12 Leg23 Leg24 Leg27 Leg3 Leg42 Leg9 Mediterranean Sea/BASIN North Atlantic/RIDGE North Pacific Sample code/label South Atlantic/HILL |
spellingShingle |
12-114 23-227 24-238 27-262 3-15 3-16 42-372 42-376 9-83A AGE Alloisoleucine/leucine ratio Calculated Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Epimerization extent Event label Glomar Challenger Indian Ocean//FRACTURE ZONE Indian Ocean//TROUGH Indian Ocean/Red Sea/TROUGH Leg12 Leg23 Leg24 Leg27 Leg3 Leg42 Leg9 Mediterranean Sea/BASIN North Atlantic/RIDGE North Pacific Sample code/label South Atlantic/HILL Katz, Barry J Harrison, Christopher G A Man, Eugene H Amino acid racemization for several DSDP samples (Table 1) |
topic_facet |
12-114 23-227 24-238 27-262 3-15 3-16 42-372 42-376 9-83A AGE Alloisoleucine/leucine ratio Calculated Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Epimerization extent Event label Glomar Challenger Indian Ocean//FRACTURE ZONE Indian Ocean//TROUGH Indian Ocean/Red Sea/TROUGH Leg12 Leg23 Leg24 Leg27 Leg3 Leg42 Leg9 Mediterranean Sea/BASIN North Atlantic/RIDGE North Pacific Sample code/label South Atlantic/HILL |
description |
Kinetic parameters for the epimerization of isoleucine in multispecific foraminiferal asemblages were used to establish the effects of burial depth and the geothermal gradient on the extent of reaction. It was observed that with a little as thirty meters of burial in a normal thermal regime there were differences between the extent of epimerization measured and that which would have been predicted for thermal equilibrium with bottom water temperatures. As would be expected, these differences are greatest when the heat flow (the geothermal gradient) and/or the sedimentation rates are highest. These effects were observed in most of the DSDP samples studied, and have been used to estimate the average heat flux since the time of sample deposition. Occasional anomalous effects were observed which could not be related to past or present heat flux. These were determined to be due to such geologic occurrences as slumping and reworking or to recent sample contamination. Other problems emerged related to bottom water temperatures including changes over geologic time which are unknown and could not be deduced. Thus, the presence of epimerization anomalies in DSDP cores as noted above limits the effectiveness of amino acid geochronology in such cores, unless these anomalies can be recognized as ab initio. |
format |
Dataset |
author |
Katz, Barry J Harrison, Christopher G A Man, Eugene H |
author_facet |
Katz, Barry J Harrison, Christopher G A Man, Eugene H |
author_sort |
Katz, Barry J |
title |
Amino acid racemization for several DSDP samples (Table 1) |
title_short |
Amino acid racemization for several DSDP samples (Table 1) |
title_full |
Amino acid racemization for several DSDP samples (Table 1) |
title_fullStr |
Amino acid racemization for several DSDP samples (Table 1) |
title_full_unstemmed |
Amino acid racemization for several DSDP samples (Table 1) |
title_sort |
amino acid racemization for several dsdp samples (table 1) |
publisher |
PANGAEA |
publishDate |
1983 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.757460 https://doi.org/10.1594/PANGAEA.757460 |
op_coverage |
MEDIAN LATITUDE: 8.557133 * MEDIAN LONGITUDE: 12.541689 * SOUTH-BOUND LATITUDE: -30.889700 * WEST-BOUND LONGITUDE: -95.737500 * NORTH-BOUND LATITUDE: 59.933300 * EAST-BOUND LONGITUDE: 123.846300 * DATE/TIME START: 1968-12-24T00:00:00 * DATE/TIME END: 1975-05-11T00:00:00 * MINIMUM ELEVATION: -3927.0 m * MAXIMUM ELEVATION: -1795.0 m |
long_lat |
ENVELOPE(-95.737500,123.846300,59.933300,-30.889700) |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Katz, Barry J; Harrison, Christopher G A; Man, Eugene H (1983): Geothermal and other effects on amino acid racemization in selected Deep-Sea Drilling Project cores. Organic Geochemistry, 5(3), 151-156, https://doi.org/10.1016/0146-6380(83)90025-6 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.757460 https://doi.org/10.1594/PANGAEA.757460 |
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.757460 https://doi.org/10.1016/0146-6380(83)90025-6 |
_version_ |
1766135256711168000 |