Bedding dip data from core site CRP-3 in Victoria Land, Antarctica
Bedding dips in the CRP-3 drillhole were determined in three ways: (1) analysis of a dipmeter log, (2) identification of bed boundaries on borehole televiewer log images, and (3) identification of bed boundaries on digital images of the outer surfaces of oriented cores. All three methods determine b...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.485006 2024-05-19T07:31:49+00:00 Bedding dip data from core site CRP-3 in Victoria Land, Antarctica Jarrard, Richard D Bücker, Christian J Wilson, Terry Paulsen, Timothy S LATITUDE: -77.006000 * LONGITUDE: 163.719000 * DATE/TIME START: 1999-10-09T00:00:00 * DATE/TIME END: 1999-11-19T00:00:00 2001 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.485006 https://doi.org/10.1594/PANGAEA.485006 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.485006 https://doi.org/10.1594/PANGAEA.485006 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Jarrard, Richard D; Bücker, Christian J; Wilson, Terry; Paulsen, Timothy S (2001): Bedding dips from the CRP-3 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 167-176, hdl:10013/epic.28210.d001 Cape Roberts Project Core wireline system CRP CRP-3 CWS Ross Sea Sampling/drilling from ice Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.485006 2024-04-30T23:34:34Z Bedding dips in the CRP-3 drillhole were determined in three ways: (1) analysis of a dipmeter log, (2) identification of bed boundaries on borehole televiewer log images, and (3) identification of bed boundaries on digital images of the outer surfaces of oriented cores. All three methods determine both dip magnitude and downdip azimuth of bedding. Dipmeter results document variations in bedding dip throughout the logged interval (20-902 mbsf), whereas core and televiewer results are available at present only for selected depth intervals. Dipmeter data indicate that structural dip is remarkably constant, at 21° dip to azimuth 65°, throughout the Tertiary shelf section, except for the top 100 m where dips appear to be 5-10° shallower. This pattern, in conjunction with the systematically increasing dips throughout CRP-2A, suggests that the growth faulting active during CRP-2A deposition began during the final period of deposition at CRP-3. Normal faults at 260 and 539 mbsf in CRP-3 exhibit neither drag (localized dip steepening) nor significant changes in structural dip across them. Oriented core and televiewer analyses, covering a total of 200 m in the interval 400-900 mbsf, indicate bedding patterns that confirm the dipmeter results. The doleritic breccia at the base of the Tertiary section has steeper dips than overlying structural dips, possibly indicating a sedimentary dip to ENE in these fan sediments. Dip directions in the underlying Devonian Beacon sandstone are surprisingly similar to those in the overlying Tertiary section. Superimposed on the average Beacon dip of 22° to the ENE are localized tilts of up to 20°, probably caused by Tertiary fracturing and brecciation rather than original sedimentary dip variations. Dataset Antarc* Antarctica Ross Sea Victoria Land PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(163.719000,163.719000,-77.006000,-77.006000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Cape Roberts Project Core wireline system CRP CRP-3 CWS Ross Sea Sampling/drilling from ice |
spellingShingle |
Cape Roberts Project Core wireline system CRP CRP-3 CWS Ross Sea Sampling/drilling from ice Jarrard, Richard D Bücker, Christian J Wilson, Terry Paulsen, Timothy S Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
topic_facet |
Cape Roberts Project Core wireline system CRP CRP-3 CWS Ross Sea Sampling/drilling from ice |
description |
Bedding dips in the CRP-3 drillhole were determined in three ways: (1) analysis of a dipmeter log, (2) identification of bed boundaries on borehole televiewer log images, and (3) identification of bed boundaries on digital images of the outer surfaces of oriented cores. All three methods determine both dip magnitude and downdip azimuth of bedding. Dipmeter results document variations in bedding dip throughout the logged interval (20-902 mbsf), whereas core and televiewer results are available at present only for selected depth intervals. Dipmeter data indicate that structural dip is remarkably constant, at 21° dip to azimuth 65°, throughout the Tertiary shelf section, except for the top 100 m where dips appear to be 5-10° shallower. This pattern, in conjunction with the systematically increasing dips throughout CRP-2A, suggests that the growth faulting active during CRP-2A deposition began during the final period of deposition at CRP-3. Normal faults at 260 and 539 mbsf in CRP-3 exhibit neither drag (localized dip steepening) nor significant changes in structural dip across them. Oriented core and televiewer analyses, covering a total of 200 m in the interval 400-900 mbsf, indicate bedding patterns that confirm the dipmeter results. The doleritic breccia at the base of the Tertiary section has steeper dips than overlying structural dips, possibly indicating a sedimentary dip to ENE in these fan sediments. Dip directions in the underlying Devonian Beacon sandstone are surprisingly similar to those in the overlying Tertiary section. Superimposed on the average Beacon dip of 22° to the ENE are localized tilts of up to 20°, probably caused by Tertiary fracturing and brecciation rather than original sedimentary dip variations. |
format |
Dataset |
author |
Jarrard, Richard D Bücker, Christian J Wilson, Terry Paulsen, Timothy S |
author_facet |
Jarrard, Richard D Bücker, Christian J Wilson, Terry Paulsen, Timothy S |
author_sort |
Jarrard, Richard D |
title |
Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
title_short |
Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
title_full |
Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
title_fullStr |
Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
title_full_unstemmed |
Bedding dip data from core site CRP-3 in Victoria Land, Antarctica |
title_sort |
bedding dip data from core site crp-3 in victoria land, antarctica |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.485006 https://doi.org/10.1594/PANGAEA.485006 |
op_coverage |
LATITUDE: -77.006000 * LONGITUDE: 163.719000 * DATE/TIME START: 1999-10-09T00:00:00 * DATE/TIME END: 1999-11-19T00:00:00 |
long_lat |
ENVELOPE(163.719000,163.719000,-77.006000,-77.006000) |
genre |
Antarc* Antarctica Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctica Ross Sea Victoria Land |
op_source |
Supplement to: Jarrard, Richard D; Bücker, Christian J; Wilson, Terry; Paulsen, Timothy S (2001): Bedding dips from the CRP-3 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 167-176, hdl:10013/epic.28210.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.485006 https://doi.org/10.1594/PANGAEA.485006 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.485006 |
_version_ |
1799469699460759552 |