Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.

In this study, we investigate the thermo-mechanical controls on the formation of the Ross Sea basin (Antarctica) and the uplift of the adjacent Transantarctic Mountains (TAM) rift shoulder, which started in the Late Cretaceous and continued until the present time. Quantitative forward modelling has...

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Published in:Global and Planetary Change
Main Authors: Busetti, M., Spadini, G., van der Wateren, F.M., Cloetingh, S.A.P.L., Zanolla, C.
Format: Article in Journal/Newspaper
Language:English
Published: 1999
Subjects:
Online Access:https://research.vu.nl/en/publications/e595850e-7ad0-47ae-b882-6d051b5ee4c1
https://doi.org/10.1016/S0921-8181(99)00052-1
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spelling ftvuamstcris:oai:research.vu.nl:publications/e595850e-7ad0-47ae-b882-6d051b5ee4c1 2024-09-30T14:25:18+00:00 Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica. Busetti, M. Spadini, G. van der Wateren, F.M. Cloetingh, S.A.P.L. Zanolla, C. 1999 https://research.vu.nl/en/publications/e595850e-7ad0-47ae-b882-6d051b5ee4c1 https://doi.org/10.1016/S0921-8181(99)00052-1 eng eng https://research.vu.nl/en/publications/e595850e-7ad0-47ae-b882-6d051b5ee4c1 info:eu-repo/semantics/closedAccess Busetti , M , Spadini , G , van der Wateren , F M , Cloetingh , S A P L & Zanolla , C 1999 , ' Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica. ' , Global and Planetary Change , vol. 23 , pp. 79-103 . https://doi.org/10.1016/S0921-8181(99)00052-1 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 1999 ftvuamstcris https://doi.org/10.1016/S0921-8181(99)00052-1 2024-09-05T00:23:22Z In this study, we investigate the thermo-mechanical controls on the formation of the Ross Sea basin (Antarctica) and the uplift of the adjacent Transantarctic Mountains (TAM) rift shoulder, which started in the Late Cretaceous and continued until the present time. Quantitative forward modelling has been performed along three 700 to 800 km long East-West offshore profiles, extended inland to the front of the TAM. The modelling is constrained by an extensive database of multichannel seismic (MCS), refraction seismic, Ocean Bottom Seismographs (OBS), and gravity data. MCS data is tied to well stratigraphy from DSDP leg 28, CIROS-1 and MSTSS-1. Quantitative estimates of uplift of the TAM are provided by previous work on apatite fission track analysis. We incorporate the finite strength of the lithosphere in basin formation models using the concept of the level of necking. Lateral variations of necking level and associated bulk theological properties (with necking levels ranging from 15 km in the northernmost, to 20 km in the central and 23 km to the southernmost profiles) are required to explain the observed crustal geometries. High values of effective elastic thickness (more than 30 km) and pre-rift lithospheric thicknesses (220-230 km), indicating a cold lithosphere in a pre-rift cratonic setting, are consistent with elevation of the rift shoulder. The western parts of the profiles appear to have unusually high stretching values without the development of oceanic crust. Inferred average values of stretching factors vary from 2.3 to 2.8, equivalent with extension in the Ross Sea of 115% to 140%. The modelling result for the uplift of the TAM predicts a late Cretaceous tectonic uplift of about 1.5 to 2.0 km, and a Cenozoic uplift of about 1.3 km restricted to southern Victoria Land. (C) 1999 Elsevier Science B.V. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Victoria Land Vrije Universiteit Amsterdam (VU): Research Portal Antarctic Ross Sea Transantarctic Mountains Victoria Land Global and Planetary Change 23 1-4 79 103
institution Open Polar
collection Vrije Universiteit Amsterdam (VU): Research Portal
op_collection_id ftvuamstcris
language English
topic /dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
spellingShingle /dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
Busetti, M.
Spadini, G.
van der Wateren, F.M.
Cloetingh, S.A.P.L.
Zanolla, C.
Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
topic_facet /dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
description In this study, we investigate the thermo-mechanical controls on the formation of the Ross Sea basin (Antarctica) and the uplift of the adjacent Transantarctic Mountains (TAM) rift shoulder, which started in the Late Cretaceous and continued until the present time. Quantitative forward modelling has been performed along three 700 to 800 km long East-West offshore profiles, extended inland to the front of the TAM. The modelling is constrained by an extensive database of multichannel seismic (MCS), refraction seismic, Ocean Bottom Seismographs (OBS), and gravity data. MCS data is tied to well stratigraphy from DSDP leg 28, CIROS-1 and MSTSS-1. Quantitative estimates of uplift of the TAM are provided by previous work on apatite fission track analysis. We incorporate the finite strength of the lithosphere in basin formation models using the concept of the level of necking. Lateral variations of necking level and associated bulk theological properties (with necking levels ranging from 15 km in the northernmost, to 20 km in the central and 23 km to the southernmost profiles) are required to explain the observed crustal geometries. High values of effective elastic thickness (more than 30 km) and pre-rift lithospheric thicknesses (220-230 km), indicating a cold lithosphere in a pre-rift cratonic setting, are consistent with elevation of the rift shoulder. The western parts of the profiles appear to have unusually high stretching values without the development of oceanic crust. Inferred average values of stretching factors vary from 2.3 to 2.8, equivalent with extension in the Ross Sea of 115% to 140%. The modelling result for the uplift of the TAM predicts a late Cretaceous tectonic uplift of about 1.5 to 2.0 km, and a Cenozoic uplift of about 1.3 km restricted to southern Victoria Land. (C) 1999 Elsevier Science B.V.
format Article in Journal/Newspaper
author Busetti, M.
Spadini, G.
van der Wateren, F.M.
Cloetingh, S.A.P.L.
Zanolla, C.
author_facet Busetti, M.
Spadini, G.
van der Wateren, F.M.
Cloetingh, S.A.P.L.
Zanolla, C.
author_sort Busetti, M.
title Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
title_short Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
title_full Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
title_fullStr Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
title_full_unstemmed Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica.
title_sort thermo-mechanical modelling of the west antarctic rift system, ross sea, antarctica.
publishDate 1999
url https://research.vu.nl/en/publications/e595850e-7ad0-47ae-b882-6d051b5ee4c1
https://doi.org/10.1016/S0921-8181(99)00052-1
geographic Antarctic
Ross Sea
Transantarctic Mountains
Victoria Land
geographic_facet Antarctic
Ross Sea
Transantarctic Mountains
Victoria Land
genre Antarc*
Antarctic
Antarctica
Ross Sea
Victoria Land
genre_facet Antarc*
Antarctic
Antarctica
Ross Sea
Victoria Land
op_source Busetti , M , Spadini , G , van der Wateren , F M , Cloetingh , S A P L & Zanolla , C 1999 , ' Thermo-mechanical modelling of the West Antarctic Rift System, Ross Sea, Antarctica. ' , Global and Planetary Change , vol. 23 , pp. 79-103 . https://doi.org/10.1016/S0921-8181(99)00052-1
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container_title Global and Planetary Change
container_volume 23
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