An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains

A. J. Rowell; M. N. Rees; E. M. Duebendorfer; E. T. Wallin; W. R. Van Schmus; E. I. Smith

doi:10.1144/gsjgs.150.4.0677

An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains

A. J. Rowell, M. N. Rees, E. M. Duebendorfer, E. T. Wallin, W. R. Van Schmus, E. I. Smith

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

Metamorphosed supracrustal rocks in the central Ross Sea sector of the Transantarctic Mountains are of Neoproterozoic age and not Cambrian. They include pillow basalts with a mantle separation age of 700-800 Ma. In the Sklelton glacier area, these rocks experienced two strong phases of deformation that produced folds and associated foliations. Both rocks and structures are cut by a 551±4 Ma unfoliated quartz syenite (late Neoproterozoic). The deformation and limited geochemical data suggest an active Antarctic plate margin whose late Neoproterozoic history is markedly different from that of the temporally equivalent rift to drift transition recorded along the autochthonous western margin of Laurentia. If these two cratons were ever contiguous, separation occurred by c700-800 Ma. -Authors

Original language	English (US)
Pages (from-to)	677-682
Number of pages	6
Journal	Journal - Geological Society (London)
Volume	150
Issue number	4
DOIs	https://doi.org/10.1144/gsjgs.150.4.0677
State	Published - Jan 1 1993
Externally published	Yes

ASJC Scopus subject areas

Geology

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title = "An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains",

abstract = "Metamorphosed supracrustal rocks in the central Ross Sea sector of the Transantarctic Mountains are of Neoproterozoic age and not Cambrian. They include pillow basalts with a mantle separation age of 700-800 Ma. In the Sklelton glacier area, these rocks experienced two strong phases of deformation that produced folds and associated foliations. Both rocks and structures are cut by a 551±4 Ma unfoliated quartz syenite (late Neoproterozoic). The deformation and limited geochemical data suggest an active Antarctic plate margin whose late Neoproterozoic history is markedly different from that of the temporally equivalent rift to drift transition recorded along the autochthonous western margin of Laurentia. If these two cratons were ever contiguous, separation occurred by c700-800 Ma. -Authors",

author = "Rowell, {A. J.} and Rees, {M. N.} and Duebendorfer, {E. M.} and Wallin, {E. T.} and {Van Schmus}, {W. R.} and Smith, {E. I.}",

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AU - Rowell, A. J.

AU - Rees, M. N.

AU - Duebendorfer, E. M.

AU - Wallin, E. T.

AU - Van Schmus, W. R.

AU - Smith, E. I.

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AB - Metamorphosed supracrustal rocks in the central Ross Sea sector of the Transantarctic Mountains are of Neoproterozoic age and not Cambrian. They include pillow basalts with a mantle separation age of 700-800 Ma. In the Sklelton glacier area, these rocks experienced two strong phases of deformation that produced folds and associated foliations. Both rocks and structures are cut by a 551±4 Ma unfoliated quartz syenite (late Neoproterozoic). The deformation and limited geochemical data suggest an active Antarctic plate margin whose late Neoproterozoic history is markedly different from that of the temporally equivalent rift to drift transition recorded along the autochthonous western margin of Laurentia. If these two cratons were ever contiguous, separation occurred by c700-800 Ma. -Authors

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An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains

Abstract

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