Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2)
Recrystallization processes in marine sediments can alter the extent to which biogenic calcite composition serves as a proxy of oceanic chemical and isotopic history. Models of calcite recrystallization developed to date have resulted in significant insights into these processes, but are not complet...
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1989
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.723370 2023-05-15T17:32:33+02:00 Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) Delaney, Margaret Lois MEDIAN LATITUDE: -0.864680 * MEDIAN LONGITUDE: 57.725000 * SOUTH-BOUND LATITUDE: -30.122700 * WEST-BOUND LONGITUDE: -19.851300 * NORTH-BOUND LATITUDE: 26.592500 * EAST-BOUND LONGITUDE: 161.825500 * DATE/TIME START: 1973-05-21T00:00:00 * DATE/TIME END: 1980-07-14T00:00:00 * MINIMUM DEPTH, sediment/rock: 225 m * MAXIMUM DEPTH, sediment/rock: 1168 m 1989-07-01 text/tab-separated-values, 111 data points https://doi.pangaea.de/10.1594/PANGAEA.723370 https://doi.org/10.1594/PANGAEA.723370 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.723370 https://doi.org/10.1594/PANGAEA.723370 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Delaney, Margaret Lois (1989): Temporal changes in interstitial water chemistry and calcite recrystallization in marine sediments. Earth and Planetary Science Letters, 95(1-2), 23-37, https://doi.org/10.1016/0012-821X(89)90165-9 30-288_Site 30-289 41-366_Site 41-369_Site 74-526_Site Calculated COMPCORE Composite Core Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP Event label Glomar Challenger Leg30 Leg41 Leg74 Magnesium/Calcium ratio Magnesium distribution coefficient North Atlantic/CONT RISE North Atlantic/CONT SLOPE Sample comment South Atlantic/CREST South Pacific South Pacific/PLATEAU Strontium/Calcium ratio Strontium distribution coefficient Temperature Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.723370 https://doi.org/10.1016/0012-821X(89)90165-9 2023-01-20T08:48:54Z Recrystallization processes in marine sediments can alter the extent to which biogenic calcite composition serves as a proxy of oceanic chemical and isotopic history. Models of calcite recrystallization developed to date have resulted in significant insights into these processes, but are not completely adequate to describe the conditions of recrystallization. Marine sediments frequently have concentration gradients in interstitial dissolved calcium, magnesium, and strontium which have probably evolved during sediment accumulation. Realistic, albeit simplified, models of the temporal evolution of interstitial water profiles of Ca, Mg, and Sr were used with several patterns of recrystallization rate variation to predict the composition of recrystallized inorganic calcite. Comparison of predictions with measured Mg/Ca and Sr/Ca ratios in severely altered calcite samples from several Deep Sea Drilling Project sites demonstrates that models incorporating temporal variation in interstitial water composition more successfully predict observed calcite compositions than do models which rely solely on present-day interstitial water chemistry. Temporal changes in interstitial composition are particularly important in interpreting Mg/Ca ratios in conjunction with Sr/Ca ratios. Estimates of Mg distribution coefficients from previous observations in marine sediments, much lower than those in laboratory studies of inorganic calcite, are confirmed by these results. Evaluation of the effects of diagenetic alteration of biogenic calcium carbonate sediment must be a site-specific process, taking into account accumulation history, present interstitial chemistry and its variation in the past, and sample depths and ages. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-19.851300,161.825500,26.592500,-30.122700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
30-288_Site 30-289 41-366_Site 41-369_Site 74-526_Site Calculated COMPCORE Composite Core Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP Event label Glomar Challenger Leg30 Leg41 Leg74 Magnesium/Calcium ratio Magnesium distribution coefficient North Atlantic/CONT RISE North Atlantic/CONT SLOPE Sample comment South Atlantic/CREST South Pacific South Pacific/PLATEAU Strontium/Calcium ratio Strontium distribution coefficient Temperature |
spellingShingle |
30-288_Site 30-289 41-366_Site 41-369_Site 74-526_Site Calculated COMPCORE Composite Core Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP Event label Glomar Challenger Leg30 Leg41 Leg74 Magnesium/Calcium ratio Magnesium distribution coefficient North Atlantic/CONT RISE North Atlantic/CONT SLOPE Sample comment South Atlantic/CREST South Pacific South Pacific/PLATEAU Strontium/Calcium ratio Strontium distribution coefficient Temperature Delaney, Margaret Lois Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
topic_facet |
30-288_Site 30-289 41-366_Site 41-369_Site 74-526_Site Calculated COMPCORE Composite Core Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP Event label Glomar Challenger Leg30 Leg41 Leg74 Magnesium/Calcium ratio Magnesium distribution coefficient North Atlantic/CONT RISE North Atlantic/CONT SLOPE Sample comment South Atlantic/CREST South Pacific South Pacific/PLATEAU Strontium/Calcium ratio Strontium distribution coefficient Temperature |
description |
Recrystallization processes in marine sediments can alter the extent to which biogenic calcite composition serves as a proxy of oceanic chemical and isotopic history. Models of calcite recrystallization developed to date have resulted in significant insights into these processes, but are not completely adequate to describe the conditions of recrystallization. Marine sediments frequently have concentration gradients in interstitial dissolved calcium, magnesium, and strontium which have probably evolved during sediment accumulation. Realistic, albeit simplified, models of the temporal evolution of interstitial water profiles of Ca, Mg, and Sr were used with several patterns of recrystallization rate variation to predict the composition of recrystallized inorganic calcite. Comparison of predictions with measured Mg/Ca and Sr/Ca ratios in severely altered calcite samples from several Deep Sea Drilling Project sites demonstrates that models incorporating temporal variation in interstitial water composition more successfully predict observed calcite compositions than do models which rely solely on present-day interstitial water chemistry. Temporal changes in interstitial composition are particularly important in interpreting Mg/Ca ratios in conjunction with Sr/Ca ratios. Estimates of Mg distribution coefficients from previous observations in marine sediments, much lower than those in laboratory studies of inorganic calcite, are confirmed by these results. Evaluation of the effects of diagenetic alteration of biogenic calcium carbonate sediment must be a site-specific process, taking into account accumulation history, present interstitial chemistry and its variation in the past, and sample depths and ages. |
format |
Dataset |
author |
Delaney, Margaret Lois |
author_facet |
Delaney, Margaret Lois |
author_sort |
Delaney, Margaret Lois |
title |
Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
title_short |
Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
title_full |
Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
title_fullStr |
Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
title_full_unstemmed |
Mg/Ca and Sr/Ca in calcites and estimated distribution coefficients in marine sediments (Table 2) |
title_sort |
mg/ca and sr/ca in calcites and estimated distribution coefficients in marine sediments (table 2) |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.723370 https://doi.org/10.1594/PANGAEA.723370 |
op_coverage |
MEDIAN LATITUDE: -0.864680 * MEDIAN LONGITUDE: 57.725000 * SOUTH-BOUND LATITUDE: -30.122700 * WEST-BOUND LONGITUDE: -19.851300 * NORTH-BOUND LATITUDE: 26.592500 * EAST-BOUND LONGITUDE: 161.825500 * DATE/TIME START: 1973-05-21T00:00:00 * DATE/TIME END: 1980-07-14T00:00:00 * MINIMUM DEPTH, sediment/rock: 225 m * MAXIMUM DEPTH, sediment/rock: 1168 m |
long_lat |
ENVELOPE(-19.851300,161.825500,26.592500,-30.122700) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Delaney, Margaret Lois (1989): Temporal changes in interstitial water chemistry and calcite recrystallization in marine sediments. Earth and Planetary Science Letters, 95(1-2), 23-37, https://doi.org/10.1016/0012-821X(89)90165-9 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.723370 https://doi.org/10.1594/PANGAEA.723370 |
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.723370 https://doi.org/10.1016/0012-821X(89)90165-9 |
_version_ |
1766130743499554816 |