Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ...
Seawater 87Sr/86Sr values increase abruptly by 28 * 10**-6 across the Cretaceous/Tertiary boundary (KTB). This small, but rapid shift is superimposed on the larger scale structure of the seawater Sr isotope curve. The time scale of radiogenic Sr addition appears to be too rapid to reconcile with sou...
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Online Access: | https://dx.doi.org/10.1594/pangaea.712154 https://doi.pangaea.de/10.1594/PANGAEA.712154 |
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ftdatacite:10.1594/pangaea.712154 2024-04-28T08:36:31+00:00 Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... Martin, Ellen E MacDougall, J Douglas 1991 application/zip https://dx.doi.org/10.1594/pangaea.712154 https://doi.pangaea.de/10.1594/PANGAEA.712154 en eng PANGAEA https://dx.doi.org/10.1016/0012-821x(91)90202-s Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Drilling/drill rig Leg39 Leg43 Leg74 Leg86 Glomar Challenger Deep Sea Drilling Project DSDP article Supplementary Publication Series of Datasets Collection 1991 ftdatacite https://doi.org/10.1594/pangaea.71215410.1016/0012-821x(91)90202-s 2024-04-02T10:00:39Z Seawater 87Sr/86Sr values increase abruptly by 28 * 10**-6 across the Cretaceous/Tertiary boundary (KTB). This small, but rapid shift is superimposed on the larger scale structure of the seawater Sr isotope curve. The time scale of radiogenic Sr addition appears to be too rapid to reconcile with sources associated with volcanism, and we show that the amount of Sr required to produce even this small increase is too large to be derived from: (1) a KT bolide of the size constrained by the Ir anomaly, (2) continental crust ejecta from the impact of such a bolide, (3) soot from global wildfires initiated by an impact, or (4) any combination of these sources. The probable source of the radiogenic Sr is enhanced continental weathering, but the high rate of increase appears to rule out processes such as sea level regression, glaciation or tectonism. A plausible mechanism for rapid addition of radiogenic Sr to the oceans is enhanced weathering associated with globally distributed acid rain (pH c. 1) which is a ... : Supplement to: Martin, Ellen E; MacDougall, J Douglas (1991): Seawater Sr isotopes at the Cretaceous/Tertiary boundary. Earth and Planetary Science Letters, 104(2-4), 166-180 ... Article in Journal/Newspaper Planktonic foraminifera DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg39 Leg43 Leg74 Leg86 Glomar Challenger Deep Sea Drilling Project DSDP |
spellingShingle |
Drilling/drill rig Leg39 Leg43 Leg74 Leg86 Glomar Challenger Deep Sea Drilling Project DSDP Martin, Ellen E MacDougall, J Douglas Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
topic_facet |
Drilling/drill rig Leg39 Leg43 Leg74 Leg86 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
Seawater 87Sr/86Sr values increase abruptly by 28 * 10**-6 across the Cretaceous/Tertiary boundary (KTB). This small, but rapid shift is superimposed on the larger scale structure of the seawater Sr isotope curve. The time scale of radiogenic Sr addition appears to be too rapid to reconcile with sources associated with volcanism, and we show that the amount of Sr required to produce even this small increase is too large to be derived from: (1) a KT bolide of the size constrained by the Ir anomaly, (2) continental crust ejecta from the impact of such a bolide, (3) soot from global wildfires initiated by an impact, or (4) any combination of these sources. The probable source of the radiogenic Sr is enhanced continental weathering, but the high rate of increase appears to rule out processes such as sea level regression, glaciation or tectonism. A plausible mechanism for rapid addition of radiogenic Sr to the oceans is enhanced weathering associated with globally distributed acid rain (pH c. 1) which is a ... : Supplement to: Martin, Ellen E; MacDougall, J Douglas (1991): Seawater Sr isotopes at the Cretaceous/Tertiary boundary. Earth and Planetary Science Letters, 104(2-4), 166-180 ... |
format |
Article in Journal/Newspaper |
author |
Martin, Ellen E MacDougall, J Douglas |
author_facet |
Martin, Ellen E MacDougall, J Douglas |
author_sort |
Martin, Ellen E |
title |
Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
title_short |
Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
title_full |
Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
title_fullStr |
Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
title_full_unstemmed |
Strontium isotope ratios of planktonic foraminifera from sediment samples acroos the K/T boundary ... |
title_sort |
strontium isotope ratios of planktonic foraminifera from sediment samples acroos the k/t boundary ... |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://dx.doi.org/10.1594/pangaea.712154 https://doi.pangaea.de/10.1594/PANGAEA.712154 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1016/0012-821x(91)90202-s |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.71215410.1016/0012-821x(91)90202-s |
_version_ |
1797568262729367552 |