Results 91 to 100 of about 4,838 (230)

Ore geology problems and the human factor. Part 1. Mineral-petrochemic zoning of the nearvveins metasomatic aureoles in the mesothermal gold deposits: theory, experiment, nature

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2017
The relevance of the research. In reconstruction of gold, coloured metals, uranium deposits formation there are the problems which have not been solved up to now.
Igor Vasilyevich Kucherenko
doaj   +2 more sources

Effect of magnetic field on current colection on bare tether in LEO [PDF]

open access: yes, 2002
An eiectrodynamic Tether is a long thin conductive string deployed from a spacecraft. A part of the ED tether near one end, which is rendered positive by the Electromotive force (EMF)along the tether, collects electrons from the ambient plasma.
Cooke, D.L.   +3 more
core  

Genesis of the Bairendaba Ag-Zn-Pb Deposit, Southern Great Xing’an Range, NE China: A Fluid Inclusion and Stable Isotope Study

open access: yesGeofluids, 2017
The Bairendaba deposit is the largest Ag-Zn-Pb deposit in Inner Mongolia. Vein and disseminated ores occur in biotite-plagioclase gneiss and quartz diorite along regional EW trending faults.
Shunda Li   +4 more
doaj   +1 more source

The importance of mineralogical knowledge in the sustainability of artisanal gold mining: a mid-south Peru case [PDF]

open access: yes, 2019
Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy.
Alfonso Abella, María Pura   +7 more
core   +2 more sources

Mineralogy of gold and the characteristics of host rock in the Podpolom (Klokoè) high sulfidation type epithermal deposit [PDF]

open access: yes, 2003
V strednej èasti stratovulkanického komplexu Javorie sa vyskytuje v podpolomskej oblasti epitermálne zrudnenie báden-pannón-skeho veku. Zrudnenie je radené k tým hydrotermálnym centrám, ktoré vznikli vo vrchnej èasti stockovitých dioritových telies ...
Földessy János, Seres-Hartai Éva
core  

Data Analysis of the Floating Potential Measurement Unit aboard the International Space Station [PDF]

open access: yes, 2009
We present data from the Floating Potential Measurement Unit (FPMU), that is deployed on the starboard (S1) truss of the International Space Station. The FPMU is a suite of instruments capable of redundant measurements of various plasma parameters.
Barjatya, Aroh   +3 more
core   +1 more source

Identification and sequence analyses of novel lipase encoding novel thermophillic bacilli isolated from Armenian geothermal springs

open access: yesBMC Microbiology, 2017
Background Among the huge diversity of thermophilic bacteria mainly bacilli have been reported as active thermostable lipase producers. Geothermal springs serve as the main source for isolation of thermostable lipase producing bacilli.
Grigor Shahinyan   +3 more
doaj   +1 more source

Earthquake slip surfaces identified by biomarker thermal maturity within the 2011 Tohoku-Oki earthquake fault zone. [PDF]

open access: yes, 2020
Extreme slip at shallow depths on subduction zone faults is a primary contributor to tsunami generation by earthquakes. Improving earthquake and tsunami risk assessment requires understanding the material and structural conditions that favor earthquake ...
Kirkpatrick, James D   +4 more
core  

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

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