Results 131 to 140 of about 285 (183)

Radiometric characteristics of some metallic ores and nonmetallic deposits: an example, Wadi Al-Allaqi, South Eastern Desert, Egypt. [PDF]

Sci Rep
Gobashy MM, El-Sadek MA, Mekkawi MM, Araffa SAS, Ezz Eldin MM, Khalil MH.   +5 more
europepmc   +1 more source

Integrated geophysical Investigation for gold mineralization potential over southern parts of Kebbi state and its Environs, northwestern Nigeria. [PDF]

Heliyon
Salako KA, Adetona AA, Rafiu AA, Augie AI, Jimoh MO, Alkali A, Muriana RA, Lawrence JO.   +7 more
europepmc   +1 more source

In situ gold adsorption experiment at an acidic hot spring using a blue-green algal sheet. [PDF]

Sci Rep
Nozaki T, Fukushima Y, Okada S, Takaya Y, Makabe A, Watanabe M.   +5 more
europepmc   +1 more source

Protracted metallogenic and magmatic evolution of the Kirazlı epithermal Au-Ag and porphyry Cu deposits, Biga Peninsula, NW Turkey: evidence from zircon U-Pb, muscovite ⁴⁰Ar/³⁹Ar, and molybdenite Re-Os geochronology. [PDF]

Miner Depos
Aluç A, Kuşcu İ, Ulyanov A, Selby D, Antoine C, Spikings R, Moritz R.   +6 more
europepmc   +1 more source

The fault systems that control the occurrences of iron ore deposits in northeastern Aswan, Egypt. [PDF]

Sci Rep
Abd El-Wahed M, Salem IA, Attia M, Younis D.   +3 more
europepmc   +1 more source

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A metasedimentary source of gold in Archean orogenic gold deposits

Geology, 2021
AbstractThe sources of metals enriched in Archean orogenic gold deposits have long been debated. Metasedimentary rocks, which are generally accepted as the main metal source in Phanerozoic deposits, are less abundant in Archean greenstone belts and commonly discounted as a viable metal source for Archean deposits.
Iain K. Pitcairn, Nikolaos Leventis, Georges Beaudoin, Stephane Faure, Carl Guilmette, Benoît Dubé   +5 more
openaire   +1 more source

Concepts and revised models for Phanerozoic orogenic gold deposits

Geological Society, London, Special Publications, 2022
Abstract Existing published models for orogenic gold deposits (OGDs) do not adequately describe or explain most deposits of Phanerozoic age, and there are numerous reasons why Phanerozoic OGDs might differ significantly from older deposits.
J. K. Mortensen, D. Craw, D. J. MacKenzie   +2 more
openaire   +1 more source

Supergene gold mobility in orogenic gold deposits, Otago Schist, New Zealand

New Zealand Journal of Geology and Geophysics, 2015
Gold has been chemically mobilised by groundwater from host sulphide minerals in orogenic gold deposits of Otago. Mobilisation occurred near the Cenozoic Otago Schist erosional surface beneath a sedimentary cover. Initial Au mobilisation, on a scale of micrometres, occurred when solid solution and microparticulate gold in pyrite and arsenopyrite grains
D Craw, D MacKenzie, P Grieve
openaire   +1 more source

Chapter 38: Hydrothermal Gold Deposition in Epithermal, Carlin, and Orogenic Deposits

2020
Abstract Epithermal, Carlin, and orogenic Au deposits form in diverse geologic settings and over a wide range of depths, where Au precipitates from hydrothermal fluids in response to various physical and chemical processes. The compositions of Au-bearing sulfidic hydrothermal solutions across all three deposit types, however, are broadly
Stuart F. Simmons, Benjamin M. Tutolo, Shaun L.L. Barker, Richard J. Goldfarb, François Robert   +4 more
openaire   +1 more source

Geology of the Lapa Orogenic Gold Deposit

2017
Abstract The Cadillac mining camp is known for its numerous, but relatively small, orogenic gold deposits, which are spatially associated with the Larder Lake-Cadillac fault zone. The Lapa deposit, with a total endowment of 36 t Au (1.15 Moz), represents the largest gold deposit of the Cadillac mining camp.
Patrick Mercier-Langevin, Marjorie Simard, Richard Dubuc, Jocelyn Côté, Pierre Doucet, Réal Daigneault, Damien Gaboury   +6 more
openaire   +1 more source