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

Research output: Chapter in Book/Report/Conference proceedingChapter

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 languageEnglish (US)
Title of host publicationJournal - Geological Society (London)
Pages677-682
Number of pages6
Volume150
Edition4
StatePublished - 1993
Externally publishedYes

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ASJC Scopus subject areas

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

Cite this

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)