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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
Contributor(s): Connor, CHH (author); Pries, WV (author); Page, RW (author); Stevens, BPJ (author); Plimer, IR (author); Ashley, Paul (author)
Publication Date: 2005
DOI: 10.1144/0016-764904-111
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Abstract: 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.
Publication Type: Journal Article
Source of Publication: Journal of the Geological Society, 162(2), p. 409-416
Publisher: Geological Society Publishing House
Place of Publication: London, United Kingdom
ISSN: 0016-7649
Field of Research (FOR): 040313 Tectonics
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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