نتایج جستجو برای: pegmatite
تعداد نتایج: 412 فیلتر نتایج به سال:
Fluid inclusions (FIs) and associated solids in host minerals garnet, tourmaline, spodumene, quartz from six pegmatite fields of Permian origin at Koralpe (Eastern Alps) have been investigated. Although pegmatites suffered intense Eoalpine high-pressure metamorphic overprint during the Cretaceous period, studied samples originate rock sections with well-preserved magmatic textures. Magmatic low...
The petrogenesis of the world famous Koktokay No. 3 pegmatite in Chinese Altai Mountains is still enigmatic due to its superenrichment rare metals and apparent absence a parental granite. We present results from granite apophysis that was recently discovered open pit. Results show it has low K/Rb (32.35−38.76), Zr/Hf (13.78−23.30), Nb/Ta (1.00−6.02), extremely K2O/Na2O (0.12−0.20) ratios, which...
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