Liquid Immiscibility and Problems of Ore Genesis: Experimental Data
| Autor: | V. S. Korzhinskaya, N. I. Suk, Yu. B. Shapovalov, Z. A. Kotelnikova, A. R. Kotelnikov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
020209 energy Analytical chemistry Salt (chemistry) 02 engineering and technology 010502 geochemistry & geophysics Alkali metal 01 natural sciences Silicate Partition coefficient chemistry.chemical_compound Ore genesis chemistry Geochemistry and Petrology Phase (matter) 0202 electrical engineering electronic engineering information engineering Carbonate Quartz Geology 0105 earth and related environmental sciences |
| Zdroj: | Petrology. 27:534-551 |
| ISSN: | 1556-2085 0869-5911 |
| DOI: | 10.1134/s0869591119050060 |
| Popis: | The paper reports the results of an experimental study of phase relations and distribution of elements in silicate melt–salt melt systems (carbonate, phosphate, fluoride, chloride), silicate melt I – silicate melt II, and fluid–magmatic systems in the presence of alkali metal fluorides. Extraction of a number of ore elements (Y, REE, Sr, Ba, Ti, Nb, Zr, Ta, W, Mo, Pb) by salt components was studied in liquid immiscibility processes within a wide temperature range of 800–1250°С and pressure of 1–5.5 kbar. It is shown that partition coefficients are sufficient for concentration of ore elements in amounts necessary for the genesis of ore deposits. In a fluid-saturated trachyrhyolite melt, the separation into two silicate liquids has been determined. The partition coefficients of a number of elements (Sr, La, Nb, Fe, Cr, Mo, K, Rb, Cs) between phases L1 and L2 have been obtained. The interaction processes of a heterophase fluid in the granite (quartz)–ore mineral–heterophase fluid (Li, Na, K-fluoride) system were studied at 650–850°C and P = 1 kbar. The formation of the phase of a highly alkaline fluid-saturated silicate melt concentrating Ta and Nb is shown as a result of the interaction of the fluid with rock and ore minerals. |
| Databáze: | OpenAIRE |
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