Results 81 to 90 of about 7,811 (229)

DISCOVERY AND DEVELOPMENT OF IULTINSKOYE TIN-TUNGSTEN DEPOSIT

Известия высших учебных заведений: Геология и разведка, 2018
The Iultinskoye deposit was discovered 80 years ago in the remote and unexplored region of Chukotka. Discovery and development of the deposit were accompanied by serious difficulties.
V. V. Romanova
doaj   +1 more source

Mineralogia dos filões aplito-pegmatíticos litiníferos da região de Segura [PDF]

, 2010
Na região de Segura, os filões aplito-pegmatíticos litiníferos Variscos intruíram o Complexo Xisto-Grauváquico, Câmbrico. Osfilões pegmatíticos são do tipo REL-Li e incluem-se na família dos pegmatitos LCT.
Antunes, I. Margarida H. Ribeiro, Neiva, Ana Margarida R., Silva, M. M. V. G., Silva, Paulo Bravo   +3 more
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REDUCING SMELTING OF CASSITERITE CONCENTRATE IN AN IONIC MELT

Литьë и металлургия, 2013
The features of coal chemical recovery cassiterite concentrate in molten salt system Na2Co3–NaNO3  (1:0,3) were studied. It is shown that cassiterite (SnO2) in the salt melt (900–950 °C) proceeds in the form metastannate (Na2SnO3) and reduced to the ...
Hosen Ri, V. V. Gostishchev, E. H. Ri
doaj  

Qualitative delineation of airborne magnetic and radiometric structures associated with cassiterite-columbite mineralization of Barikin Ladi Tin field, Jos North-Central Nigeria

Discover Geoscience
This study uses airborne magnetic and radiometric data to delineate the structures associated with Cassiterite-Columbite Mineralization of high resolution of NGSA data Tin field, Jos North Central Nigeria.
M. Umar, A. L. Ahmed, J. O. Osumeje, S. S. Magaji   +3 more
doaj   +1 more source

Minerals in Afghanistan : rare-metal deposits [PDF]

, 2007
In Afghanistan rare metals (lithium, caesium, tantalum and niobium) occur in three main deposit types: pegmatites, mineralised springs and playa-lake sediments (Figure 1).
Benham, Antony John, Coats, Stan
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Development of new all-optical signal regeneration technique [PDF]

, 2017
All-optical signal regeneration have been the active research area since last decade due to evolution of nonlinear optical signal processing. Existing all-optical signal regeneration techniques are agitated in producing low Bit Error Rate (BER) of 10-10 ...
A Mohajerin-Ariaei, AE Willner, B Das, B Das, Bhagwan Das, Bishwajeet Pandey, C Lundström, F Parmigiani, F Wen, H Zhu, I Kaminow, J Wang, L Jones, Labeeb Mohammed Adam Ahmed, M Kagawa, Mohammad Faiz Liew Abdullah, Nor Shahida Mohd Shah, R Damani, R Slavík, SL Olsson, Z Chen, Z Tong   +21 more
core   +1 more source

Petrogenesis and tectonic-magmatic context of emplacement of lepidolite and petalite pegmatites from the Fregeneda-Almendra field (Variscan Central Iberian Zone): clues from Nb-Ta-Sn oxide U-Pb geochronology and mineral geochemistry

BSGF - Earth Sciences Bulletin
The Fregeneda-Almendra pegmatite field of the Iberian Massif represents a typical expression of peraluminous rare-metal magmatism that occurred over western Europe at the end of the Variscan orogeny.
Ballouard Christophe, Carr Patrick, Parisot Flore, Gloaguen Éric, Melleton Jérémie, Cauzid Jean, Lecomte Andreï, Rouer Olivier, Salsi Lise, Mercadier Julien   +9 more
doaj   +1 more source

The cassiterite-anatase-ilmenite-monazite-sulphide-chlorite assemblage of North Tincroft Lode [PDF]

, 2013
North Tincroft Lode (New Cook's Kitchen Mine) forms a segment of an ENE-WSW-striking lode structure that can be traced for similar to2 km along strike and similar to800 m vertically through the Camborne-Redruth mining district, Lode samples from ...
Jewson, C., LeBoutillier, N.G., Shail, RK   +2 more
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Sixth annual conference on alaskan placer mining [PDF]

, 1984
An abridged format of papers, presentations and addresses given during the 1984 conference held on March 28-29, 1984, compiled and edited by Daniel E. Walsh and M.
Walsh, D.E., Wray, Susan
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Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires [PDF]

, 2006
Defects in SnO2 nanowires have been studied by cathodoluminescence, and the obtained spectra have been compared with those measured on SnO2 nanocrystals of different sizes in order to reveal information about point defects not determined by other ...
Arbiol i Cobos, Jordi, Avella, M., Cirera Hernández, Albert, Comini, Elisabetta, Faglia, G., Morante i Lleonart, Joan Ramon, Prades García, Juan Daniel, Sberveglieri, Giorgio, Zanotti, L.   +8 more
core   +2 more sources