Computer Science
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.331..254g&link_type=abstract
Nature (ISSN 0028-0836), vol. 331, Jan. 21, 1988, p. 254-257. Research supported by the Western Australian Mining and Petroleum
Computer Science
15
Carbon Isotopes, Enrichment, Gold, Mineral Deposits, Sea Water, Australia, Carbon Dioxide, Carbonates, Geology, Planetary Evolution
Scientific paper
Evidence for seafloor alteration and fault-controlled regional alteration, two carbonate-alteration styles that predate regional metamorphism and gold mineralization in the Norseman-Wiluna greenstone belt of Western Australia, is summarized. It is shown that these styles have completely different carbon isotope compositions. Fault-controlled regional alteration implies a major juvenile carbon flux from the mantle during greenstone-belt evolution, and is thus of fundamental importance in itself. It is shown why the mere existence of two carbon-in-carbonate reservoirs and variation in carbon isotope ratio of carbonates between individual gold deposits in one area negate some of the fundamental assumptions used to support magmatic-fluid models.
Barley Mark E.
Golding Suzanne D.
Groves D. I.
McNaughton Neal J.
Rock Nicholas M. S.
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