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Cenozoic continental rifting in the north-western Ross Sea

Davey, Fred J. and Cande, Stephen and Stock, Joann (2021) Cenozoic continental rifting in the north-western Ross Sea. New Zealand Journal of Geology and Geophysics, 65 (3). pp. 389-396. ISSN 0028-8306. doi:10.1080/00288306.2021.1891942.

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Marine gravity and seismic data are used to derive a preliminary crustal model for the Central Basin of the northern Ross Sea. The model is consistent with the presence of a thick (8 km) ocean crust. Existing geophysical data indicates the rift forming the Central Basin continues, with offsets, into the Central Trough further south. Using limited existing data on the age (61–53 Ma), and the amount and direction of extension of the Central rift system, an estimate is made of the pole of rotation for 61–53 Ma (79°S, 170°W and rotation 6°). This pole of rotation and those for 43–26 Ma and 26–10 Ma, previously derived, are used to reconstruct the northern Ross Sea margin prior to 61 Ma. The reconstruction shows a close fit of the continental components.

Item Type:Article
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URLURL TypeDescription
Davey, Fred J.0000-0003-1294-5290
Stock, Joann0000-0003-4816-7865
Additional Information:© 2021 The Royal Society of New Zealand. Received 17 Aug 2020, Accepted 14 Feb 2021, Published online: 04 Mar 2021. Gravity modelling used Geosource Oasis montaj software. Reviews by two anonymous reviewers are greatly appreciated. Disclosure statement: No potential conflict of interest was reported by the author(s). Data availability statement: Data sharing is not applicable to this article as no new data were created or analysed in this study.
Group:Seismological Laboratory, Division of Geological and Planetary Sciences
Subject Keywords:Ross Sea; Cenozoic rifting; rotation pole; crustal gravity model; continental reconstruction
Issue or Number:3
Record Number:CaltechAUTHORS:20210413-121133507
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Official Citation:Fred J. Davey, Stephen Cande & Joann Stock (2022) Cenozoic continental rifting in the north-western Ross Sea, New Zealand Journal of Geology and Geophysics, 65:3, 389-396, DOI: 10.1080/00288306.2021.1891942
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108714
Deposited By: Tony Diaz
Deposited On:13 Apr 2021 22:16
Last Modified:11 Nov 2022 22:29

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