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Type: Journal article
Title: Discussion on detachment faulting and bimodal magmatism in the Palaeoproterozoic Willyama Supergroup, south-central Australia: keys to recognition of a multiply deformed Precambrian metamorphic core complex
Author: Conor, C. H. H.
Priess, W. V.
Page, R. W.
Stevens, B. P. J.
Plimer, Ian Rutherford
Ashley, Paul M.
Gibson, G. M.
Nutman, A. P.
Citation: Journal of the Geological Society, 2005; 162(2):409-416
Publisher: Geological Society of London
Issue Date: 2005
ISSN: 0016-7649
School/Discipline: School of Earth and Environmental Sciences : Geology and Geophysics
Statement of
C. H. H. Connor, W. V. Pries, R. W. Page, B. P. J. Stevens, I. R. Plimer and P. M. Ashley
Abstract: C. H. H. Connor, W. V. Pries, R. W. Page, B. P. J. Stevens, I. R. Plimer and P. M. Ashley write: Gibson & Nutman (2004) postulate that the Willyama Supergroup in the southern Curnamona Province contains a 1690–1670 Ma metamorphic core complex, and imply that this is relevant to the genesis of the Broken Hill Pb–Zn–Ag deposit. We contend that this is a model-driven, speculative interpretation predicated upon unsupported assertions that conflict with substantial stratigraphic and geochronological data. Not only does the paper fail to demonstrate an early high-grade event and formation of a metamorphic core complex at 1690–1670 Ma, but it is also factually incorrect in several critical geological and geochronological aspects. The detachment concepts of Gibson & Nutman may appear persuasive, but only by omitting reference to a huge body of published and recent mapping and laboratory research, by companies, universities, and geological surveys, some of which are cited here. Surprisingly, Gibson & Nutman ignore much recent work (e.g. Page et al. 2004) to which one of them has contributed.
Rights: © 2005 Geological Society of London
DOI: 10.1144/0016-764904-111
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Appears in Collections:Geology & Geophysics publications

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