Статья посвящена решению одной из научных проблем металлогении Восточного Донбасса, определяющей связь рудных проявлений с магматизмом. Актуальность исследования. В практическом отношении и в научном плане Восточный Донбасс всегда изучался основном как угленосный бассейн. Вместе тем пределах его открытой части были установлены рудопроявления цветных, редких благородных металлов. сравнении Запад...

The behavior of nickel (Ni) isotopes during magmatic differentiation is not adequately explored. Here, we find that tholeiitic rocks in the Kīlauea Iki (KI) lava lake, Hawai'i, show progressively lighter Ni isotopic compositions with increasing differentiation, whereas calc-alkaline from thick Kamchatka arc (30–45 km), located at convergent boundary Eurasian and Pacific plates isotope values as...

Hydrothermally altered samples from outcrops along the eastern Stillwater Range (NV), and scale and vein samples from Dixie Valley geothermal wells were collected for fluid-inclusion analyses. Fluidinclusion microthermometry and gas analysis by quadropole mass spectrometry were applied to establish the chemistry of the fluids trapped during alteration. Relationships between CO2/CH4, N2/Ar, and ...

Numerous important Miocene and early Pliocene epithermal Au-Ag deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite. These magmatic assemblages are petrogenetic suites that reflect variations in tectonic environment of magma generation. The bimodal assemblage is a K-rich thol...

Understanding the magmatic plumbing system of rift volcanoes is essential when examining interplay between and tectonic forces. Recent seismicity, volcanic activity, magma emplacement, volatile release make Natron basin ideal location to study these processes in East African Rift System. Here, we present first high-resolution tomographic imaging Oldoinyo Lengai volcano surrounding systems using...

mineral paragenesis of rodingitized basic rocks of iranian ophiolites are presented and metasomatic reactions between ca+2 bearing aqueous fluids issued during serpentinization of host ultramafic rock – with magmatic minerals of basic rocks leading to present paragenesis of rodingites are discussed. it is concluded that ca+2 rich aqueous fluid in equilibrium with serpentinite has high ca+2 chem...