Results 61 to 70 of about 8,700 (211)
Copper mineral occurrences in the Wrangell Mountains-Prince William Sound area, Alaska [PDF]
, 1971 On January 9, 1970, the U.S. Bureau of Mines entered into an agreement with the University of Alaska based upon a proposal submitted by the Mineral Industry Research Laboratory.
Grybeck, D.G., Heiner, L.E., Wolff, E.N.
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Resource Geology, Volume 76, Issue 1, January/December 2026.The Leon deposit is interpreted as a sediment‐hosted gold deposit with a probable distal intrusion‐centered setting. Hydrothermal fluids migrated through fractures and bedding planes, likely leached sulfur and metals from andesitic rocks, and formed orebodies along bedding planes and at limestone–andesite contacts controlled by permeability contrasts ...
Muhammad Arba Azzaman +8 more
wiley +1 more source
The Scientific World Journal, 2002 Arsenopyrite (FeAsS) is the principal arsenic (As) mineral in mineralised mesothermal veins (typically 5,000 mg/kg As) in southeastern New Zealand. Groundwater in contact with arsenopyrite-bearing rocks has elevated As concentrations (up to 0.1 mg/l ...
D. Craw, L. Pacheco
doaj +1 more source
Gold in Britain : past, present and future [PDF]
, 2010 Britain is a country with modest gold deposits. At least six tonnes, possibly up to ten tonnes, of gold have been recovered from numerous localities in Britain.
Colman, Tim
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Resource Geology, Volume 76, Issue 1, January/December 2026.Isatomae Formation illustrating mineralogical and geochemical characteristics. (a) Overview of the Isatomae Formation, showing the marine anoxic environment and related biogenic processes. (b) Deposition of metal‐rich Fe oxyhydroxides were transformed into sulfides through diagenesis and low grade metamorphism.
June Born Born +4 more
wiley +1 more source
The Geologic Features of the Occurrence of Copper in North America [PDF]
, 1933 Copper is of such widespread natural occurrence in North America and there are so few metal-mining districts that have not contributed to its production that it is obviously necessary in any brief general treatment of the geology of the copper deposits ...
Ransome, F. L.
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Recycling of tailings from the Barruecopardo tungsten deposit for the production of glass [PDF]
, 2016 Peer ReviewedPostprint (author's final ...
Alfonso Abella, María Pura +5 more
core +2 more sources
New Zealand Journal of Geology and Geophysics, Volume 68, Issue 5, Page 1120-1152, December 2025.ABSTRACT Chemically distinctive features such as high salinity, low nutrient contents, and extremes of pH can limit the development of a vegetation cover on soil‐free bare ground. This study synthesises our previous work on the geoecology of numerous chemically distinctive bare sites in the South Island and adds a temporal component within the last ...
Dave Craw, Cathy Rufaut
wiley +1 more source
Geophysical Prospecting, Volume 73, Issue 9, November 2025.ABSTRACT Hydrothermal alteration plays a crucial role in the precipitation of gold and other metals, particularly within orogenic gold deposits hosted in mafic and ultramafic rocks. This alteration significantly modifies the rock matrix, leading to changes in its petrophysical properties.
Yasaman Nemati +6 more
wiley +1 more source
Yankuang ceshi, 2016 Quartz vein-type gold deposits of Southeastern Guizhou Province in the southwestern margin of Jiangnan Orogen, which are typical orogenic gold deposits, are hosted in Neoproterozoic Banxi Group sub-greenschist facies metamorphic rocks.
GU Shang-yi +4 more
doaj +1 more source