Tectonic history of mid-Miocene to present southern Victoria Land Basin, inferred from seismic stratigraphy in McMurdo Sound, Antarctica

New and existing seismic reflection data in southern McMurdo Sound have been used to investigate Neogene tectonic history of the Terror Rift adjacent to the Transantarctic Mountains and along the western margin of the West Antarctic Rift System. Seismic data image a young rifting episode that is lar...

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Bibliographic Details
Main Authors: Henrys, Stuart A, Wilson, T. J., Fielding, Christopher R., Hall, J., Naish, T. R.
Format: Text
Language:unknown
Published: DigitalCommons@University of Nebraska - Lincoln 2008
Subjects:
Earth Sciences
Antarctic
Victoria Land
McMurdo Sound
Ross Island
Transantarctic Mountains
Antarc*
Antarctica
Online Access:https://digitalcommons.unl.edu/geosciencefacpub/285
https://digitalcommons.unl.edu/context/geosciencefacpub/article/1288/viewcontent/Fielding_AAKCW_2008_Tectonic_history.pdf
Description
Summary:New and existing seismic reflection data in southern McMurdo Sound have been used to investigate Neogene tectonic history of the Terror Rift adjacent to the Transantarctic Mountains and along the western margin of the West Antarctic Rift System. Seismic data image a young rifting episode that is largely unsampled by CRP and CIROS drill holes. Data reveal up to 3.5 km of post middle Miocene strata deposited in this part of the NNW-SSE trending Terror Rift basin. Mapped fault trends in the southern Terror Rift parallel the axis of the basin and are prominent in a 40 km wide zone north of Ross Island. Displacement on individual faults in this zone can exceed 100 m and faults collectively accommodate approximately 10-15 km of middle Miocene to recent extension.

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