Results 71 to 80 of about 3,729 (220)

Mineralogical Changes and H2 Generation Yield During Hydrothermal Alteration of a Magnetite‐Siderite Assemblage

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract To date, the generation of natural hydrogen (H2) from the alteration of FeII‐bearing minerals has mainly been studied through serpentinization in (ultra)mafic rocks. This study explores Banded Iron Formations (BIF), which are rich in FeII minerals, as a potential source for H2.
U. Geymond   +5 more
wiley   +1 more source

Mining wastes as CO oxidation mesoporous catalysts from the Fe-skarns of Serifos Island, Cyclades, Greece

open access: yesSustainable Chemistry for the Environment
The Fe-skarns from the Greek Island of Serifos in Cyclades has been utilized only for the exploitation of magnetite ores, while significantly vast amounts of red and yellow hematite ores remained unexploited as mining wastes.
Maria Mpiliou   +8 more
doaj   +1 more source

Mantle magma-thermofluidodynamic and intracrustal granitoid-hydrothermal-metasomatic auriferous systems [PDF]

open access: yes, 2007
Contents of typical models of formation of abyssal and intra-core ore-forming systems are discussed. As it has been already marked, the interaction between core and mantle ore-forming systems occurred at formation of large and unique golden-ore deposits.
Korobeynikov, A. F.
core  

Coupled Paleomagnetism and 40Ar/39Ar Dating of Latera Ignimbrites (Vulsini Volcanic District, Italy) Unravel Processes Associated to Piston‐Collapse Calderas

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Correlation of ignimbrite units at polygenic calderas is mandatory for the reconstruction of caldera‐forming events and proper identification of their eruption dynamics. However, ignimbrites erupted at different times from the same caldera can display similarities in composition and lithology that can hamper proper correlation of outcrops ...
Arianna Beatrice Malaguti   +5 more
wiley   +1 more source

Late Cretaceous adakitic magmatism in east-central Sonora, Mexico, and its relation to Cu-Zn-Ni-Co skarns

open access: yesRevista Mexicana de Ciencias Geológicas, 2014
La orogenia del Cretácico Tardío-Terciario temprano o Laramide (90–40 Ma) en el noroeste de México produjo un importante magmatismo calcialcalino, acompañado por diversos yacimientos asociados de tipo pórfido cuprífero y skarn.
Efrén Pérez-Segura   +2 more
doaj  

Dzheltulak system of the Oktyabrsky ore-placer node of the Amur gold-bearing province

open access: yesИзвестия высших учебных заведений: Геология и разведка
Background. Information on the Dzheltulak large placer system of the Amur gold-bearing province, which has produced 80 tons of gold, is presented. Aim. To determine the geological and structural position of the Dzheltulak placer system, one of the most ...
V. A. Stepanov, A. V. Melnikov
doaj   +1 more source

La terminación sur-occidental del batolito de Andorra-Mont LLluís: características petrológicas y geoquímicas [PDF]

open access: yes, 1989
El batolito de Andorra-Mont Lluís es un tipico representante de los granitos de emplazamiento epizonal de los Pirineos. En su parte sur-occidental est6 constituido principalmente por granodioritas biotíticas, granodioritas biotítico-hornbltndicas y ...
Enrique, P., Soler, A.
core   +1 more source

Rasgos generales de los skarns y mineralizaciones asociadas del Sistema Central español [PDF]

open access: yes, 1986
[Resumen] La existencia en el Sistema Central Español de gran variedad de mineralizaciones ligadas a skarns permite discriminarlas en base al protalito, profundidad de emplazamiento y composición del granito asociado.Estas variables definen las ...
Casquet Martín, César   +1 more
core   +2 more sources

A Mina-Escola de Santa Luzia-PB: um laboratório didático para estudantes de Mineração/Geologia

open access: yesTerrae Didatica, 2018
A Mina Escola representa um recurso didático localizada nas adjacências da cidade de Santa Luzia, Paraíba. Corresponde a um laboratório para estudos relacionados a mineração, em função dos seus componentes, tais como: mina subterrânea, escritório ...
Lauro Cézar Montefalco de Lira Santos   +2 more
doaj   +1 more source

Guia de campo "A febre do ouro" [PDF]

open access: yes, 2018
Programa e guia de campo do Curso de primavera do Projecto ZOM 3D ...
Araújo, António   +6 more
core  

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