Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1)
40Ar/39Ar dating of volcanic clasts and pumice provide constraints for depositional ages of the CRP-1 core. Laser-fusion analyses of anorthoclase phenocrysts from pumice clasts concentrated near 116 mbsf suggest a depositional age of 18.40 ± 1.12 Ma (± 2). Results from anorthoclase phenocrysts and g...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.54737 2023-05-15T14:04:42+02:00 Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) McIntosh, W C McIntosh, Bill LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 33.23 m * MAXIMUM DEPTH, sediment/rock: 116.98 m 1998-01-15 text/tab-separated-values, 80 data points https://doi.pangaea.de/10.1594/PANGAEA.54737 https://doi.org/10.1594/PANGAEA.54737 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.54737 https://doi.org/10.1594/PANGAEA.54737 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: McIntosh, W C (1998): 40Ar/39Ar geochronology of volcanic clasts and pumice in CRP-1 core, Cape Roberts, Antarctica. Terra Antartica, 5(3), 683-690, hdl:10013/epic.28322.d001 16 km ENE Cape Roberts Age 40Ar/39Ar Argon-Argon dated dated standard deviation Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sample code/label Sampling/drilling ice Visual description Yield Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.54737 2023-01-20T07:35:43Z 40Ar/39Ar dating of volcanic clasts and pumice provide constraints for depositional ages of the CRP-1 core. Laser-fusion analyses of anorthoclase phenocrysts from pumice clasts concentrated near 116 mbsf suggest a depositional age of 18.40 ± 1.12 Ma (± 2). Results from anorthoclase phenocrysts and groundmass concentrates from five clasts of reworked lava provide maximum depositional ages of 19.73 ± 0.86 Ma to 17.15 ± 0.80 Ma for the 61 to 114 mbsf interval of CRP-1. The most precise age determination is 19.32 ± 0.14 Ma for the trachytic clasts near 105 mbsf. Taken together, the 40Ar/39Ar results from the lower part of CRP-1 suggest that none of the sediment above 116 mbsf is older than 19.5 Ma, and the data are most compatible with rapid accumulation of the 61 to 116 mbsf segment of CRP-1 near 18 Ma. 40AR/39Ar results from a basaltic clast from the carbonate-rich layer at 33 mbsf provide a maximum depositional age of 1.2 ± 0.1 Ma for this horizon. Dataset Antarc* Antarctica Ross Sea PANGAEA - Data Publisher for Earth & Environmental Science Ross Sea Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
16 km ENE Cape Roberts Age 40Ar/39Ar Argon-Argon dated dated standard deviation Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sample code/label Sampling/drilling ice Visual description Yield |
spellingShingle |
16 km ENE Cape Roberts Age 40Ar/39Ar Argon-Argon dated dated standard deviation Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sample code/label Sampling/drilling ice Visual description Yield McIntosh, W C McIntosh, Bill Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
topic_facet |
16 km ENE Cape Roberts Age 40Ar/39Ar Argon-Argon dated dated standard deviation Cape Roberts Project Comment Core wireline system CRP CRP-1 CWS Depth bottom/max sediment/rock top/min Lithology/composition/facies off Cape Roberts Ross Sea Antarctica Sample code/label Sampling/drilling ice Visual description Yield |
description |
40Ar/39Ar dating of volcanic clasts and pumice provide constraints for depositional ages of the CRP-1 core. Laser-fusion analyses of anorthoclase phenocrysts from pumice clasts concentrated near 116 mbsf suggest a depositional age of 18.40 ± 1.12 Ma (± 2). Results from anorthoclase phenocrysts and groundmass concentrates from five clasts of reworked lava provide maximum depositional ages of 19.73 ± 0.86 Ma to 17.15 ± 0.80 Ma for the 61 to 114 mbsf interval of CRP-1. The most precise age determination is 19.32 ± 0.14 Ma for the trachytic clasts near 105 mbsf. Taken together, the 40Ar/39Ar results from the lower part of CRP-1 suggest that none of the sediment above 116 mbsf is older than 19.5 Ma, and the data are most compatible with rapid accumulation of the 61 to 116 mbsf segment of CRP-1 near 18 Ma. 40AR/39Ar results from a basaltic clast from the carbonate-rich layer at 33 mbsf provide a maximum depositional age of 1.2 ± 0.1 Ma for this horizon. |
format |
Dataset |
author |
McIntosh, W C McIntosh, Bill |
author_facet |
McIntosh, W C McIntosh, Bill |
author_sort |
McIntosh, W C |
title |
Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
title_short |
Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
title_full |
Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
title_fullStr |
Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
title_full_unstemmed |
Summary of 40Ar/39Ar results from core sediment CRP-1 (Table 1) |
title_sort |
summary of 40ar/39ar results from core sediment crp-1 (table 1) |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.54737 https://doi.org/10.1594/PANGAEA.54737 |
op_coverage |
LATITUDE: -77.007580 * LONGITUDE: 163.755080 * DATE/TIME START: 1997-10-17T01:30:00 * DATE/TIME END: 1997-10-24T02:00:00 * MINIMUM DEPTH, sediment/rock: 33.23 m * MAXIMUM DEPTH, sediment/rock: 116.98 m |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.755080,163.755080,-77.007580,-77.007580) |
geographic |
Ross Sea Cape Roberts |
geographic_facet |
Ross Sea Cape Roberts |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_source |
Supplement to: McIntosh, W C (1998): 40Ar/39Ar geochronology of volcanic clasts and pumice in CRP-1 core, Cape Roberts, Antarctica. Terra Antartica, 5(3), 683-690, hdl:10013/epic.28322.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.54737 https://doi.org/10.1594/PANGAEA.54737 |
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.54737 |
_version_ |
1766275940319494144 |