Results 91 to 100 of about 7,257 (220)
Report on geophysical and geological surveys at Blackmount, Argyllshire [PDF]
, 1977 Blackmount, on the southern fringe of Rannoch Moor is largely drift covered but, where exposed, the underlying Precambrian Moine psammite contains granitic veins which probably stem from the adjacent (Devonian) Moor of Rannoch granite.
Marsden, G.R., Smith, C.G.
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Quantifying gas emissions from the "Millennium Eruption" of Paektu volcano, Democratic Peoples Republic of Korea/China [PDF]
, 2016 Paektu volcano (Changbaishan) is a rhyolitic caldera that straddles the border between the Democratic People’s Republic of Korea and China. Its most recent large eruption was the Millennium Eruption (ME; 23 km3 dense rock equivalent) circa 946 CE, which ...
Donovan, A. +12 more
core +3 more sources
Yankuang ceshi, 2016 Re-Os isotope method is a powerful tool for dating ore deposits, but digesting samples with the Carius tube is complicated and dangerous.A simple and quick method to determine the age of molybdenite Re-Os and Re content has been established.5-15 mg of ...
YANG Xue +5 more
doaj +1 more source
Infrared spectra of some sulfides and their analogs of binary composition in the long-wave region [PDF]
The far infrared spectra (500-60/cm) of some simple sulfides and their analogs were studied. In all, 22 minerals with different structure types were investigated, out of which 14 are sulfides (galena, alabandite, pyrrhotite, sphalerite, wurtzite ...
Povarennykh, A. S. +3 more
core +1 more source
Re-Os and Pb-Pb geochronology of the Archean Salobo iron oxide copper-gold deposit, Carajás mineral province, northern Brazil [PDF]
, 2018 Rhenium-osmium ages were determined for two molybdenite samples and a Pb-Pb age was derived from bornite-chalcopyrite-magnetite at the Salobo iron oxide copper-gold deposit to determine the timing of mineralization and its relation to the nearby Old ...
Chiaradia, Massimo +3 more
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Yankuang ceshi, 2017 Understanding the occurrence of Re in ore minerals is the prerequisite for comprehensive recovery of rhenium. The study on the occurrence of Re in copper-molybdenum ores of Fujiawu deposit is lacking. Chemical analysis, optical microscopic identification,
XIA Yu +4 more
doaj +1 more source
Metallogenic features of Miocene porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology [PDF]
, 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
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Oxidation roasting of molybdenite concentrate
Transactions of Nonferrous Metals Society of China, 2015 In order to investigate the oxidation roasting of molybdenite concentrate in pure oxygen atmosphere, experiments at 673, 723, 773, 873 and 973 K were carried out. The phase transitions and morphology evolutions of the samples obtained at different temperatures after reacting for different time were analyzed by X-ray diffraction (XRD) and scanning ...
Lu WANG +3 more
openaire +1 more source
Frontiers in Earth ScienceIn this paper, the Binnan molybdenum (Mo) deposit, a newly discovered deposit located in the Great Xing’an Range, eastern section of the Central Asian Orogenic Belt, has been subjected to a comprehensive integrated study involving field surveys, rhenium ...
Zhongyou Qi +6 more
doaj +1 more source
Contact Metamorphism in Southern California [PDF]
, 1954 A highly condensed introduction to "Contact metamorphism in southern California" is obviously not the place in which to indulge in semantic niceties nor to engage in terminological tussles, and thus the title is not intended to reflect a carefully ...
Campbell, Ian
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