نتایج جستجو برای: tourmaline
تعداد نتایج: 413 فیلتر نتایج به سال:
Abstract The thermal behaviour of an uvite from San Piero in Campo (Elba Island, Italy) was investigated at room pressure through situ high-temperature powder X-ray diffraction (PXRD), until the breakdown conditions were reached. variation structural parameters (unit-cell and mean bond distances) monitored together with site occupancies we observed thermally induced Fe oxidation process counter...
Nezamabad region is a part of Boroujerd granitoid comple)( (western Iran) which has been cut by various quartz-tourmaline veins with appro)(imately 0,5 to 2 m thickness, Mineralogical and electron microprobe analyses of the tourmalines in those veins and quartzdioritic host rock show that they are schor! and dravite one in terms of composition (with a general tendency toward dravite end me...
Lalezar Granitoid Complex is located in the south-east of Urumieh-Dokhtar volcanic belt and Dehaj-Sarduieh belt (Kerman Province). It contains plutonic rocks with granitoid composition and has been intruded into the Eocene volcano-sedimentary rocks. The plutonic rocks have granite to gabbrodiorite composition with dominance of tonalite and diorite rocks. The main mineral phases are sodic plagio...
The Yamrang Pegmatite in the Ikhabu Field, Eastern Nepal is Nepal’s primary source of aquamarine. This paper reports detailed mineralogy and whole rock granite pegmatite geochemistry, major trace element data for alkali feldspar muscovite order to classify aquamarine-bearing Pegmatite, elucidate beryl-saturation processes evaluate potential geochemical exploration tools beryl-pegmatites. Five i...
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