Liquid Immiscibility and Problems of Ore Genesis: Experimental Data
- Authors: Shapovalov Y.B.1, Kotelnikov A.R.1, Suk N.I.1, Korzhinskaya V.S.1, Kotelnikova Z.A.2
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Affiliations:
- Korzhinskii Institute of Experimental Mineralogy (IEM), Russian Academy of Sciences
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM), Russian Academy of Sciences
- Issue: Vol 27, No 5 (2019)
- Pages: 534-551
- Section: Article
- URL: https://journals.rcsi.science/0869-5911/article/view/177750
- DOI: https://doi.org/10.1134/S0869591119050060
- ID: 177750
Cite item
Abstract
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.
About the authors
Yu. B. Shapovalov
Korzhinskii Institute of Experimental Mineralogy (IEM), Russian Academy of Sciences
Author for correspondence.
Email: shap@iem.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432
A. R. Kotelnikov
Korzhinskii Institute of Experimental Mineralogy (IEM), Russian Academy of Sciences
Author for correspondence.
Email: kotelnik@iem.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432
N. I. Suk
Korzhinskii Institute of Experimental Mineralogy (IEM), Russian Academy of Sciences
Email: kotelnik@iem.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432
V. S. Korzhinskaya
Korzhinskii Institute of Experimental Mineralogy (IEM), Russian Academy of Sciences
Email: kotelnik@iem.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432
Z. A. Kotelnikova
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM),Russian Academy of Sciences
Email: kotelnik@iem.ac.ru
Russian Federation, Moscow, 119017