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https://hdl.handle.net/2440/45069
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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 Responsibility: | 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 |
Published version: | http://jgs.geoscienceworld.org/cgi/content/extract/162/2/409 |
Appears in Collections: | Geology & Geophysics publications |
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