Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology
The denudational history along a transect across the western margin of the Lambert Graben, northern Prince Charles Mountains, East Antarctica, is quantified on the basis of thermal history modeling of apatite fission track data from four vertical profiles. Early Cretaceous paleogeothermal gradients...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/76464 2024-01-14T09:59:51+01:00 Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology Lisker, Frank Brown, Roderick William Fabel, Frederick http://hdl.handle.net/1885/76464 unknown American Geophysical Union 0278-7407 http://hdl.handle.net/1885/76464 Tectonics Keywords: Cretaceous denudation fission track dating geothermal gradient Gondwana graben thermal evolution Antarctica East Antarctica Lambert Glacier Gondwana Landscape evolution Paleotemperature Rifting Journal article ftanucanberra 2023-12-15T09:37:58Z The denudational history along a transect across the western margin of the Lambert Graben, northern Prince Charles Mountains, East Antarctica, is quantified on the basis of thermal history modeling of apatite fission track data from four vertical profiles. Early Cretaceous paleogeothermal gradients estimated from the fission track data increase from ∼19°C km-l ∼50 km west of the rift margin to ∼29°C km-1 within the immediate vicinity of the western master fault. Two discrete phases of enhanced denudation during the Phanerozoic are inferred for the western rift margin. The first occurred during the early Paleozoic, with minimum denudation of between 1.6 and 5.0 km, which is broadly coeval with initial rifting and the major period of Permo-Triassic sedimentation within the Lambert Graben. The formation of the graben was related to the formation of the ancestral Gamburtsev Mountains due to Variscan compression and substantial crustal thickening of the East Antarctic Craton. The second phase of denudation commenced in the Early Cretaceous, with estimated amounts ranging between 1.0 and 4.5 km, generally increasing toward the rift margin, with the maximum total denudation occurring ∼20 km west of the western master fault of the graben. The Early Cretaceous phase of denudation was probably related to tectonic reactivation of the earlier Permo-Triassic rift during the initial separation of the Indian and Antarctic sector of Gondwana. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Lambert Glacier Prince Charles Mountains Australian National University: ANU Digital Collections Antarctic East Antarctica Indian Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) |
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Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Cretaceous denudation fission track dating geothermal gradient Gondwana graben thermal evolution Antarctica East Antarctica Lambert Glacier Gondwana Landscape evolution Paleotemperature Rifting |
spellingShingle |
Keywords: Cretaceous denudation fission track dating geothermal gradient Gondwana graben thermal evolution Antarctica East Antarctica Lambert Glacier Gondwana Landscape evolution Paleotemperature Rifting Lisker, Frank Brown, Roderick William Fabel, Frederick Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
topic_facet |
Keywords: Cretaceous denudation fission track dating geothermal gradient Gondwana graben thermal evolution Antarctica East Antarctica Lambert Glacier Gondwana Landscape evolution Paleotemperature Rifting |
description |
The denudational history along a transect across the western margin of the Lambert Graben, northern Prince Charles Mountains, East Antarctica, is quantified on the basis of thermal history modeling of apatite fission track data from four vertical profiles. Early Cretaceous paleogeothermal gradients estimated from the fission track data increase from ∼19°C km-l ∼50 km west of the rift margin to ∼29°C km-1 within the immediate vicinity of the western master fault. Two discrete phases of enhanced denudation during the Phanerozoic are inferred for the western rift margin. The first occurred during the early Paleozoic, with minimum denudation of between 1.6 and 5.0 km, which is broadly coeval with initial rifting and the major period of Permo-Triassic sedimentation within the Lambert Graben. The formation of the graben was related to the formation of the ancestral Gamburtsev Mountains due to Variscan compression and substantial crustal thickening of the East Antarctic Craton. The second phase of denudation commenced in the Early Cretaceous, with estimated amounts ranging between 1.0 and 4.5 km, generally increasing toward the rift margin, with the maximum total denudation occurring ∼20 km west of the western master fault of the graben. The Early Cretaceous phase of denudation was probably related to tectonic reactivation of the earlier Permo-Triassic rift during the initial separation of the Indian and Antarctic sector of Gondwana. |
format |
Article in Journal/Newspaper |
author |
Lisker, Frank Brown, Roderick William Fabel, Frederick |
author_facet |
Lisker, Frank Brown, Roderick William Fabel, Frederick |
author_sort |
Lisker, Frank |
title |
Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
title_short |
Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
title_full |
Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
title_fullStr |
Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
title_full_unstemmed |
Denudational and termal history along a transect across the Lambert Graben, northern Prince Charles Mountains, Antarctica, derived from apatite fission track thermochronology |
title_sort |
denudational and termal history along a transect across the lambert graben, northern prince charles mountains, antarctica, derived from apatite fission track thermochronology |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/1885/76464 |
long_lat |
ENVELOPE(67.246,67.246,-71.427,-71.427) ENVELOPE(67.490,67.490,-73.065,-73.065) |
geographic |
Antarctic East Antarctica Indian Prince Charles Mountains Lambert Glacier |
geographic_facet |
Antarctic East Antarctica Indian Prince Charles Mountains Lambert Glacier |
genre |
Antarc* Antarctic Antarctica East Antarctica Lambert Glacier Prince Charles Mountains |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Lambert Glacier Prince Charles Mountains |
op_source |
Tectonics |
op_relation |
0278-7407 http://hdl.handle.net/1885/76464 |
_version_ |
1788061277663264768 |