TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA)
The USARP Mountains comprise two N-S-aligned mountain ranges (Daniels Range, Pomerantz Tableland) located along the western margin of the RennickGlacier inNorthernVictoria Land (NVL). Four zircon and titanite ¢ssion track (FT) ages fromgranitic samples from the PomerantzTableland fall in a common ra...
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ftunivroma3iris:oai:iris.uniroma3.it:11590/117259 2024-02-27T08:35:16+00:00 TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) LISKER F A. L. LAUFER A. L OLESCH W. M SCHAFER T. ROSSETTI, FEDERICO Lisker, F A. L., Laufer A., L OLESCH W., M Rossetti, Federico Schafer, T. 2006 http://hdl.handle.net/11590/117259 eng eng volume:18 firstpage:497 lastpage:520. journal:BASIN RESEARCH http://hdl.handle.net/11590/117259 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33845369173 info:eu-repo/semantics/article 2006 ftunivroma3iris 2024-01-31T17:36:09Z The USARP Mountains comprise two N-S-aligned mountain ranges (Daniels Range, Pomerantz Tableland) located along the western margin of the RennickGlacier inNorthernVictoria Land (NVL). Four zircon and titanite ¢ssion track (FT) ages fromgranitic samples from the PomerantzTableland fall in a common range of 369^392Ma.The apatite FTages from20GraniteHarbour Intrusive rocks sampled throughout theUSARPMountains are distinctively younger (86^270Ma); their mean track lengths (MTL) vary between11.0 and13.9mm. Six samples fromRenirie Rocks and the Kavrayskiy Hills east of theUSARPMountains have even younger, concordant apatiteFTages of 43^71Ma, andMTL of 12.2^14.0 mm.Thermal history modelling of the thermochronological data indicate that both the Daniels Range and PomerantzTableland experienced a common Phanerozoic geologic history consisting of a mid-Devonian pulse of rapid denudation, followed by a protracted denudation stage between the Carboniferous and Jurassic.This latter period of denudationwas contemporaneous with the formation of theTransantarctic Basin to the east.We consequently suggest that theUSARP Mountains were one of the major source areas for the Beacon Supergroup that formed the ¢ll of the Transantarctic Basin.Subsequent to the deposition of the Beacon sequence, the now-outcropping rocks of theUSARPMountains were buried to a maximum depth of 4.2km. A palaeogeothermal gradient of 25 8 1Ckm1was inferred at the time of maximumburial. Inversion of theTransantarctic Basin due to the breakup of Gondwana, and in response to Cenozoic rifting and uplift of theTransantarctic Mountains, has triggered the ¢nal denudation stages recorded inNVL since the Cretaceous.Thereby, the amounts of denudation increase eastward.Whereas 2.4^4.2 km of crustal unloading are recognized for theUSARPMountains since the Cretaceous,more than 4 km of denudation has occurred towards the RennickGraben alone since the Eocene.This denudationwas associatedwith major fault activities involving earlyENE^WSWtoE^W-directed extension.Related ... Article in Journal/Newspaper Antarc* Antarctica Victoria Land Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Victoria Land Daniels Range ENVELOPE(160.000,160.000,-71.250,-71.250) Usarp Mountains ENVELOPE(160.000,160.000,-71.167,-71.167) Kavrayskiy Hills ENVELOPE(161.083,161.083,-70.450,-70.450) Pomerantz Tableland ENVELOPE(159.833,159.833,-70.633,-70.633) |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
description |
The USARP Mountains comprise two N-S-aligned mountain ranges (Daniels Range, Pomerantz Tableland) located along the western margin of the RennickGlacier inNorthernVictoria Land (NVL). Four zircon and titanite ¢ssion track (FT) ages fromgranitic samples from the PomerantzTableland fall in a common range of 369^392Ma.The apatite FTages from20GraniteHarbour Intrusive rocks sampled throughout theUSARPMountains are distinctively younger (86^270Ma); their mean track lengths (MTL) vary between11.0 and13.9mm. Six samples fromRenirie Rocks and the Kavrayskiy Hills east of theUSARPMountains have even younger, concordant apatiteFTages of 43^71Ma, andMTL of 12.2^14.0 mm.Thermal history modelling of the thermochronological data indicate that both the Daniels Range and PomerantzTableland experienced a common Phanerozoic geologic history consisting of a mid-Devonian pulse of rapid denudation, followed by a protracted denudation stage between the Carboniferous and Jurassic.This latter period of denudationwas contemporaneous with the formation of theTransantarctic Basin to the east.We consequently suggest that theUSARP Mountains were one of the major source areas for the Beacon Supergroup that formed the ¢ll of the Transantarctic Basin.Subsequent to the deposition of the Beacon sequence, the now-outcropping rocks of theUSARPMountains were buried to a maximum depth of 4.2km. A palaeogeothermal gradient of 25 8 1Ckm1was inferred at the time of maximumburial. Inversion of theTransantarctic Basin due to the breakup of Gondwana, and in response to Cenozoic rifting and uplift of theTransantarctic Mountains, has triggered the ¢nal denudation stages recorded inNVL since the Cretaceous.Thereby, the amounts of denudation increase eastward.Whereas 2.4^4.2 km of crustal unloading are recognized for theUSARPMountains since the Cretaceous,more than 4 km of denudation has occurred towards the RennickGraben alone since the Eocene.This denudationwas associatedwith major fault activities involving earlyENE^WSWtoE^W-directed extension.Related ... |
author2 |
Lisker, F A. L., Laufer A., L OLESCH W., M Rossetti, Federico Schafer, T. |
format |
Article in Journal/Newspaper |
author |
LISKER F A. L. LAUFER A. L OLESCH W. M SCHAFER T. ROSSETTI, FEDERICO |
spellingShingle |
LISKER F A. L. LAUFER A. L OLESCH W. M SCHAFER T. ROSSETTI, FEDERICO TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
author_facet |
LISKER F A. L. LAUFER A. L OLESCH W. M SCHAFER T. ROSSETTI, FEDERICO |
author_sort |
LISKER F |
title |
TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
title_short |
TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
title_full |
TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
title_fullStr |
TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
title_full_unstemmed |
TRANSANTARCTIC BASIN: NEWINSIGHTS FROM FISSION TRACKAND STRUCTURAL DATA FROM THE USARP MOUNTAINS AND ADJACENT AREAS (NORTHERN VICTORIA LAND,ANTARCTICA) |
title_sort |
transantarctic basin: newinsights from fission trackand structural data from the usarp mountains and adjacent areas (northern victoria land,antarctica) |
publishDate |
2006 |
url |
http://hdl.handle.net/11590/117259 |
long_lat |
ENVELOPE(160.000,160.000,-71.250,-71.250) ENVELOPE(160.000,160.000,-71.167,-71.167) ENVELOPE(161.083,161.083,-70.450,-70.450) ENVELOPE(159.833,159.833,-70.633,-70.633) |
geographic |
Victoria Land Daniels Range Usarp Mountains Kavrayskiy Hills Pomerantz Tableland |
geographic_facet |
Victoria Land Daniels Range Usarp Mountains Kavrayskiy Hills Pomerantz Tableland |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
volume:18 firstpage:497 lastpage:520. journal:BASIN RESEARCH http://hdl.handle.net/11590/117259 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33845369173 |
_version_ |
1792041736469479424 |