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

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

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

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

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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)
Title of host publication	Journal - Geological Society (London)
Pages	677-682
Number of pages	6
Volume	150
Edition	4
State	Published - 1993
Externally published	Yes

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ASJC Scopus subject areas

Earth and Planetary Sciences(all)
Environmental Science(all)
Geology

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Rowell, A. J., Rees, M. N., Duebendorfer, E. M., Wallin, E. T., Van Schmus, W. R., & Smith, E. I. (1993). An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains. In Journal - Geological Society (London) (4 ed., Vol. 150, pp. 677-682)

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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",

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T2 - evidence from the Skelton Glacier area, Transantarctic Mountains

AU - Rowell, A. J.

AU - Rees, M. N.

AU - Duebendorfer, Ernest M

AU - Wallin, E. T.

AU - Van Schmus, W. R.

AU - Smith, E. I.

PY - 1993

Y1 - 1993

N2 - 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

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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