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Читать далееThe article analyses ceramic contexts dated to the early-third quarter of the 5th century AD coming from level III.2 of Ilyich I settlement. The dating finds are represented by fragments of amphoras C Snp I, C Snp II-1, Böttger III.1, Böttger II.4, LRA 1 A, C IV E, LR 4 C 2, Zeest 96/97 and red-slip wares forms PRSW 1, PRSW 3, LRC 1 D/2, LRC 3 B, LRC 3 B/C, …
Читать далееSelectivity of a number of vermiculites, montmorillonites and micas for K and Cs ions was determined by sorption of these ions from equilibrium solutions of diverse concentrations. The selectivity coefficients were related to the layer charge density and the area of the frayed edges in layer silicates.Montmorillonites had the smallest selectivity for the two …
Читать далееDistribution of water among the main rock-forming nominally anhydrous minerals of mantle xenoliths of peridotitic and eclogitic parageneses from the Udachnaya kimberlite pipe, Yakutia, has been studied by IR spectroscopy. The spectra of all minerals
Читать далееBiotite in deeply weathered granitic rocks in southwestern Australia has altered to exfoliated grains composed of biotite, mixed-layer clay minerals, kaolinite, vermiculite, gibbsite, goethite, and hematite. Discrete vermiculite and vermiculite-dominant mixed-layer clay minerals are not major weathering products. Oxidation of octahedral iron in biotite is …
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Читать далееJan 1, 1994 · The equilibrium temperatures for inclusions of garnet intergrowths with phlogopite in clinopyroxene using garnetclinopyroxene (Ellis and Green, 1979;Ravna, 2000) and garnet-biotite geothermometers ...
Читать далееКазахстан расположит в Евразии и её площадь занимает девятое…
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