The origin of gold in Archaean epigenetic gold deposits. by M. Meyer and R. Saager
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The origin of gold in Archaean epigenetic gold deposits. by M. Meyer and R. Saager

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Published by University of the Witwatersrand in Johannesburg .
Written in English

Subjects:

  • Gold

Book details:

Edition Notes

11

ContributionsSaager, R.
The Physical Object
Pagination11 p.
Number of Pages11
ID Numbers
Open LibraryOL22014879M

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  Archaean gold-quartz vein/shear zone systems constitute one of the most important types of gold ore deposit; however, their origin is controversial. Here we discuss newly obtained δ13C(PDB. The generally smaller gold deposits formed mainly in ultramafic or greywacke hosts. Younger (ca. Ga) platform-phase greenstones appear intermediate in nature but, unlike other greenstones, have significant epigenetic gold deposits in originally oxide-facies BIF, which were deposited on relatively deep-water by: The Case for Gold An Introduction to Geology and Resources of Gold in the United States By DANIEL R. SHAWE Geochemistry of Gold in Hydrothermal Deposits By SAMUEL B. ROMBERGER U.S. GEOLOGICAL SURVEY BULLETIN GEOLOGY AND RESOURCES OF GOLD IN THE UNITED STATES DANIEL R. SHAWE and ROGER P. ASHLEY, Scientific Author: Daniel R. Shawe, Samuel B. Romberger. G.N Phillips, D.I Groves, J.E MartynAn epigenetic origin for Archean banded iron formation hosted gold deposits Econ. Geol., 79 (), pp. Google ScholarCited by: 3.

Precambrian deposits are the dominant members of the IOCG group in terms of both copper and gold resources. The 12 IOCG deposits with > tonnes (t) resources are located in intracratonic settings within about km of the margins of Archean or Paleoproterozoic cratons or other lithospheric boundaries, and formed to m.y. after Cited by: Jonathan Law, Neil Phillips, "Witwatersrand gold-pyrite-uraninite deposits do not support a reducing Archean atmosphere", Evolution of Early Earth's Atmosphere, Hydrosphere, and Biosphere - Constraints from Ore Deposits, Stephen E. Kesler, Hiroshi Ohmoto. No mass-independent sulfur isotope fractionation in auriferous fluids supports a magmatic origin for Archean gold deposits Article (PDF Available) in Geology 41(7) . The conspicuous abundance of epigenetic gold mineralization in the Archaean, however, is attributed to the unique geologic and metamorphic history .

Archaean Geochemistry - The realisation that the continental crust contains well-preserved relics which date as far back as 4/5 of the Earth's age has given a great impetus to the study of early Precambrian terrains. As late as the mid . The Kalahari Goldridge Mine is located within the Archaean Kraaipan Greenstone Belt, about 60 km southwest of Mafikeng in the North West Province, South Africa. The ore body thickness varies from 15 to 45 m along a strike length of about km within approximately N-S striking banded iron formation (BIF). The Geochemistry of Gold and Its Deposits (Geological Survey Bulletins: No. ) by Boyle, R. W. and a great selection of related books, art and collectibles available now at In addition however, around 22% of the gold from the Abitibi Belt in Quebec has come from massive sulphide base metal deposits within felsic volcanics. The largest of these was Horne, at Noranda, now exhausted, which yielded 58 Mt @ % Cu, g/t Au for t Au.