Results 81 to 90 of about 22,117 (186)

NEW METALLOGENETIC CONCEPTS AND SUBSTAINABILITY PERSPECTIVES FO NON-ENERGY METALLIC MINERALS IN CENTRAL MACEDONIA, GREECE [PDF]

open access: yes, 2010
Greece’s geology favours a potent and dynamic use of mineral resources, which became a major incentive of the country’s mining business, and economic and social growth.
Arvanitidis, N.D.
core   +1 more source

Regional geologic setting and metallogenesis of central Inner Mongolia, China: guides for exploration of mesothermal gold deposits

open access: yesOre Geology Reviews, 1999
Abstract The central Inner Mongolia district forms one of the most important metallogenic provinces in China, because the district has been influenced by repeated distinct tectonomagmatic activity. The genetic relationships and spatial–temporal evolution of ancient tectonism and associated geologic structures and metallogeny are discussed in this ...
Hong Tao Zhang   +2 more
openaire   +2 more sources

Optical Trajectory of the Insulator-to-metal Transition of Ultra-thin Gold Films [PDF]

open access: yesarXiv, 2009
We apply interferometric picometrology to measure the complex refractive index and dielectric properties of ultra-thin gold films as a continuous function of thickness from 0.2 nm to 10 nm deposited on thermal oxide on silicon. Three distinct regimes are found for the dielectric constant trajectory in the complex plane.
arxiv  

REE geochemistry of ore zones in the Archean auriferous schist belts of the eastern Dharwar Craton, south India [PDF]

open access: yes, 2001
The eastern Dharwar Craton of southern India includes at least three ~2700Ma supracrustal belts (schist belts) which have mesothermal, quartz-carbonate vein gold mineralization emplaced within the sheared metabasalts.
Giritharan, T. S., Rajamani, V.
core   +1 more source

Formation of oreshoots in mesothermal gold-quartz vein deposits: examples from Queensland, Australia

open access: yesOre Geology Reviews, 1993
Abstract Mesothermal gold/quartz vein deposits in granitoid-hosted and melange/sediment-hosted goldfields, contain oreshoots in areas of structural dilation. The environment of formation is localized at depths of 2–5 km in brittle to brittle-ductile shear zones which have stick-slip seismic movement.
openaire   +2 more sources

Active geothermal systems with entrained seawater as analogues for low-sulphidation epithermal mineralization [PDF]

open access: yes, 2005
The paradigm for low-sulphidation (LS) volcanic-arc associated mineralization is the active geothermal systems located along the Taupo Volcanic Zone (e.g. Broadlands). However, this analogue is inapt where fluid salinities are consistently in excess of 3.
Darbyshire, Fiona   +2 more
core   +1 more source

THE BALKAN MOUNTAINS PALEOZOIC GOLD DEPOSITS [PDF]

open access: yes, 2004
A number of Paleozoic gold deposits are situated in the Hercynian terrains of the Balkan Mountain. On Bulgarian territory Govezhda and Svishti Plaz deposits are the most important ones.
Dimitrova, D.   +2 more
core   +1 more source

GEOLOGIC SETTING, CHARACTERISTICS, AND GEOCHEMISTRY OF GOLD-BEARING QUARTZ VEINS IN THE KLAMATH MOUNTAINS IN THE REDDING 1x2 DEGREE QUADRANGLE, NORTHERN CALIFORNIA [PDF]

open access: yes, 2020
More than three million ounces of gold have been produced from several geological terranes of the Eastern Klamath Mountains in the Redding, California 1x2 degree quadrangle.
Joanne Danielson   +2 more
core  

Mono-, bi- and tri- graphene layers deposited on conductive Au/Cr/SiO2/Si substrate studied by scanning tunnelling spectroscopy [PDF]

open access: yesarXiv, 2008
Graphene devices require electric contacts with metals, particularly with gold. Scanning tunneling spectroscopy studies of electron local density of states performed on mono-, bi- and tri- graphene layer deposited on metallic conductive Au/Cr/SiO2/Si substrate shows that gold substrate causes the Fermi level shift downwards which means that holes are ...
arxiv  

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