(Table 1) Detrital modes for sand grains in sediment core CRP-3
Detrital modes determined on 68 sandstone samples from CRP-3 drillcore indicate a continuation of the dynamic history of uplift-related erosion and unroofing previously documented in CRP-1 and CRP-2/2A. The source area is identified very strongly with the Transantarctic Mountains (TAM) Dry Valleys b...
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2001
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.484685 https://doi.org/10.1594/PANGAEA.484685 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.484685 2023-05-15T18:07:34+02:00 (Table 1) Detrital modes for sand grains in sediment core CRP-3 Smellie, John L LATITUDE: -77.006000 * LONGITUDE: 163.719000 * DATE/TIME START: 1999-10-09T00:00:00 * DATE/TIME END: 1999-11-19T00:00:00 * MINIMUM DEPTH, sediment/rock: 24.32 m * MAXIMUM DEPTH, sediment/rock: 787.66 m 2001-04-22 text/tab-separated-values, 1427 data points https://doi.pangaea.de/10.1594/PANGAEA.484685 https://doi.org/10.1594/PANGAEA.484685 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.484685 https://doi.org/10.1594/PANGAEA.484685 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Smellie, John L (2001): History of Oligocene erosion, uplift and unroofing of the Transantarctic Mountains deduced from Sandstone detrital modes in CRP-3 drillcore, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 481-490, hdl:10013/epic.28225.d001 Amphibole Biotite Cape Roberts Project Coarse fraction/modal analysis Components indeterminata Core wireline system CRP CRP-3 CWS DEPTH sediment/rock Feldspar Grain size description Matrix Metamorphite Minerals Muscovite Opaque minerals Plagioclase Pyroxene Quartz angular polycrystalline rounded Ross Sea Sampling/drilling from ice Sedimentary rock Volcanic glass brown Volcanite Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.484685 2023-01-20T08:21:48Z Detrital modes determined on 68 sandstone samples from CRP-3 drillcore indicate a continuation of the dynamic history of uplift-related erosion and unroofing previously documented in CRP-1 and CRP-2/2A. The source area is identified very strongly with the Transantarctic Mountains (TAM) Dry Valleys block in southern Victoria Land. Initial unroofing of the TAM comprised removal of much of a former capping sequence of Jurassic Kirkpatrick basalts, which preceded the formation of the Victoria Land Basin. Erosion of Beacon Supergroup outcrops took place during progressive uplift of the TAM in the Oligocene. Earliest CRP-3 Oligocene samples above 788 metres below the sea floor (mbsf) were sourced overwhelmingly in Beacon Supergroup strata, including a recognisable contribution from Triassic volcanogenic Lashly Formation sandstones (uppermost Victoria Group). Moving up-section, by 500 mbsf, the CRP-3 samples are depauperate quartz arenites dominantly derived from the quartzose Devonian Taylor Group. Between c. 500 and 450 mbsf, the modal parameters show a distinctive change indicating that small outcrops of basement granitoids and metamorphic rocks were also being eroded along with the remaining Beacon (mainly Taylor Group) sequence. Apart from enigmatic fluctuations in modal indices above 450 mbsf, similar to those displayed by samples in CRP-2/2A, the CRP-3 modes are essentially constant (within a broad data scatter) to the top of CRP-3. The proportion of exposed basement outcrop remained at < 20 %, indicating negligible uplift (i.e. relative stability) throughout that period. Dataset Ross Sea Victoria Land PANGAEA - Data Publisher for Earth & Environmental Science Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Ross Sea Transantarctic Mountains Victoria Land 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 |
Amphibole Biotite Cape Roberts Project Coarse fraction/modal analysis Components indeterminata Core wireline system CRP CRP-3 CWS DEPTH sediment/rock Feldspar Grain size description Matrix Metamorphite Minerals Muscovite Opaque minerals Plagioclase Pyroxene Quartz angular polycrystalline rounded Ross Sea Sampling/drilling from ice Sedimentary rock Volcanic glass brown Volcanite |
spellingShingle |
Amphibole Biotite Cape Roberts Project Coarse fraction/modal analysis Components indeterminata Core wireline system CRP CRP-3 CWS DEPTH sediment/rock Feldspar Grain size description Matrix Metamorphite Minerals Muscovite Opaque minerals Plagioclase Pyroxene Quartz angular polycrystalline rounded Ross Sea Sampling/drilling from ice Sedimentary rock Volcanic glass brown Volcanite Smellie, John L (Table 1) Detrital modes for sand grains in sediment core CRP-3 |
topic_facet |
Amphibole Biotite Cape Roberts Project Coarse fraction/modal analysis Components indeterminata Core wireline system CRP CRP-3 CWS DEPTH sediment/rock Feldspar Grain size description Matrix Metamorphite Minerals Muscovite Opaque minerals Plagioclase Pyroxene Quartz angular polycrystalline rounded Ross Sea Sampling/drilling from ice Sedimentary rock Volcanic glass brown Volcanite |
description |
Detrital modes determined on 68 sandstone samples from CRP-3 drillcore indicate a continuation of the dynamic history of uplift-related erosion and unroofing previously documented in CRP-1 and CRP-2/2A. The source area is identified very strongly with the Transantarctic Mountains (TAM) Dry Valleys block in southern Victoria Land. Initial unroofing of the TAM comprised removal of much of a former capping sequence of Jurassic Kirkpatrick basalts, which preceded the formation of the Victoria Land Basin. Erosion of Beacon Supergroup outcrops took place during progressive uplift of the TAM in the Oligocene. Earliest CRP-3 Oligocene samples above 788 metres below the sea floor (mbsf) were sourced overwhelmingly in Beacon Supergroup strata, including a recognisable contribution from Triassic volcanogenic Lashly Formation sandstones (uppermost Victoria Group). Moving up-section, by 500 mbsf, the CRP-3 samples are depauperate quartz arenites dominantly derived from the quartzose Devonian Taylor Group. Between c. 500 and 450 mbsf, the modal parameters show a distinctive change indicating that small outcrops of basement granitoids and metamorphic rocks were also being eroded along with the remaining Beacon (mainly Taylor Group) sequence. Apart from enigmatic fluctuations in modal indices above 450 mbsf, similar to those displayed by samples in CRP-2/2A, the CRP-3 modes are essentially constant (within a broad data scatter) to the top of CRP-3. The proportion of exposed basement outcrop remained at < 20 %, indicating negligible uplift (i.e. relative stability) throughout that period. |
format |
Dataset |
author |
Smellie, John L |
author_facet |
Smellie, John L |
author_sort |
Smellie, John L |
title |
(Table 1) Detrital modes for sand grains in sediment core CRP-3 |
title_short |
(Table 1) Detrital modes for sand grains in sediment core CRP-3 |
title_full |
(Table 1) Detrital modes for sand grains in sediment core CRP-3 |
title_fullStr |
(Table 1) Detrital modes for sand grains in sediment core CRP-3 |
title_full_unstemmed |
(Table 1) Detrital modes for sand grains in sediment core CRP-3 |
title_sort |
(table 1) detrital modes for sand grains in sediment core crp-3 |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.484685 https://doi.org/10.1594/PANGAEA.484685 |
op_coverage |
LATITUDE: -77.006000 * LONGITUDE: 163.719000 * DATE/TIME START: 1999-10-09T00:00:00 * DATE/TIME END: 1999-11-19T00:00:00 * MINIMUM DEPTH, sediment/rock: 24.32 m * MAXIMUM DEPTH, sediment/rock: 787.66 m |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.719000,163.719000,-77.006000,-77.006000) |
geographic |
Cape Roberts Ross Sea Transantarctic Mountains Victoria Land |
geographic_facet |
Cape Roberts Ross Sea Transantarctic Mountains Victoria Land |
genre |
Ross Sea Victoria Land |
genre_facet |
Ross Sea Victoria Land |
op_source |
Supplement to: Smellie, John L (2001): History of Oligocene erosion, uplift and unroofing of the Transantarctic Mountains deduced from Sandstone detrital modes in CRP-3 drillcore, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 481-490, hdl:10013/epic.28225.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.484685 https://doi.org/10.1594/PANGAEA.484685 |
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.484685 |
_version_ |
1766179774681579520 |