Results 101 to 110 of about 9,030 (251)

Metallogenic features of Miocene porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology [PDF]

open access: yes, 2018
Mineralization and alteration events at ten Miocene porphyry Cu and porphyry-related epithermal mineral deposits in southern, central, and northern Ecuador were dated by means of molybdenite Re-Os, biotite and alunite 40Ar/39Ar, and titanite U-Pb ...
Barra, Fernando   +4 more
core  

Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2014
Leaching of molybdenite concentrate with hydrogen peroxide in sulfuric acid solution was investigated to determine the effects of reaction time, reaction temperature, H2O2 concentration, H2SO4 concentration, pulp density and rotation speed on molybdenum ...
Mehdi Moazemi Goodarzi   +2 more
doaj  

Kinetics roasting low grade concentrates molybdenite [PDF]

open access: yes, 2013
El molibdeno es un metal atractivo para la fabricación de aceros y fundiciones debido a que promueve un marcado endurecimiento, aumentando la resistencia mecánica cuando la aleación se somete a enfriamientos controlados en un rango de temperaturas ...
Bazan Brizuela, Vanesa Lucia   +2 more
core   +1 more source

Concordant ages for the giant Kipushi base metal deposit (DR Congo) from direct Rb-Sr and Re-Os dating of sulfides [PDF]

open access: yes, 2018
We report concordant ages of 451.1 ± 6.0 and 450.5 ± 3.4Ma from direct Rb-Sr and Re-Os isochron dating, respectively, of ore-stage Zn-Cu-Ge sulfides, including sphalerite for the giant carbonate-hosted Kipushi base metal (+Ge) deposit in the ...
Brauns, Michael   +2 more
core  

Transfer of molybdenum disulfide to various metals [PDF]

open access: yes
Sliding friction experiments were conducted with molybdenum disulfide single crystals in contact with sputter cleaned surfaces of copper, nickel, gold, and 304 stainless steel.
Barton, G. C., Pepper, S. V.
core   +1 more source

The Geologic Features of the Occurrence of Copper in North America [PDF]

open access: yes, 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.
core  

Plutonic associations of North-East, Bahia [PDF]

open access: yes, 1987
Dans le but d'illustrer une excursion géologique, les auteurs décrivent les associations plutoniques du nord-est de l'Etat de Bahia. Ils abordent le cadre géologique régional et ils présentent les caractéristiques pétrologiques et structurales à l ...
Giuliani, Gaston   +2 more
core  

Molybdenite investigations in southeastern Alaska [PDF]

open access: yes, 1946
_;__________--__,-_-_--_-----____-_-.r_--_-___-_-...---"7 Molybdenite deposits of the Nunatak area, Muir Inlet, Glacier Bay, by W.'S. Twenhofel.----"--_____.._-_..____________..___ 9 Introduction._________________________________________________ 9 Climate..--_-----___-__--__--_.-.____._-_.______ 10 Geology.___-_--__---. .--_-__-----__--_____--_______ ..
openaire   +1 more source

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