Journal ArticleDOI
Sediment-hosted gold deposits: Distal products of magmatic-hydrothermal systems
TLDR
This paper proposed that gold was contributed by magmatic hydrothermal fluids and was deposited on the peripheries of base and precious-metal districts, up to several kilometres from progenitor intrusions.Abstract:
Sediment-hosted or Carlin-type gold deposits are currently thought to have been generated at shallow levels in geothermal systems, the gold having been scavenged from host sedimentary sequences by meteoric hydrothermal fluids. In contrast, we propose that gold was contributed by magmatic hydrothermal fluids and was deposited on the peripheries of base and precious-metal districts, up to several kilometres from progenitor intrusions. Support for our model is provided by relations at Bau in eastern Malaysia, Bingham in Utah, and elsewhere, combined with geologic, chronologic, and metallogenic observations from the three principal alignments of gold-bearing deposits in Nevada. The proposed model has important exploration implications, and can be tested.read more
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Journal ArticleDOI
Porphyry Copper Systems
TL;DR: Porphyry Cu systems are the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and sediment-hosted Au deposits in increasingly peripheral locations; and superjacent high and intermediate-sulfidation epithermal deposits as mentioned in this paper.
Book ChapterDOI
Exploration for Epithermal Gold Deposits
TL;DR: The successful exploration geologist uses knowledge of geologic relationships and ore-deposit styles, tempered by experience, to interpret all information available from a given prospect in order to develop an understanding of its mineral potential.
Journal ArticleDOI
100th Anniversary Special Paper: Vapor Transport of Metals and the Formation of Magmatic-Hydrothermal Ore Deposits
TL;DR: A review of the evidence for the transport of metals by vapor (which is defined as an aqueous fluid of any composition with a density lower than its critical density) can be found in this article.
Journal ArticleDOI
A Carbonaceous Sedimentary Source-Rock Model for Carlin-Type and Orogenic Gold Deposits
TL;DR: In this paper, the authors present evidence and arguments that carbonaceous sedimentary rocks were a source for Au and As in sediment-hosted orogenic and Carlin-type gold deposits and develop a corresponding genetic model.
Journal ArticleDOI
The physical and chemical evolution of low-salinity magmatic fluids at the porphyry to epithermal transition: a thermodynamic study
TL;DR: In this article, the physical evolution of low-salinity to medium-saliency fluids of variable density, en route from their magmatic source through the porphyry regime to the near-surface epithermal environment, and investigates the chemical conditions required for effective transport of gold and other components from the magmatic to the Epithermal domain.