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Liquid Immiscibility and Problems of Ore Genesis: Experimental Data
Petrology ( IF 1.5 ) Pub Date : 2019-09-17 , DOI: 10.1134/s0869591119050060
Yu. B. Shapovalov , A. R. Kotelnikov , N. I. Suk , V. S. Korzhinskaya , Z. A. Kotelnikova

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.

中文翻译:

液体不溶混性和成矿问题:实验数据

该论文报道了硅酸盐熔体-盐熔体系统(碳酸盐,磷酸盐,氟化物,氯化物),硅酸盐熔体I-硅酸盐熔体II以及流体-岩浆系统中元素的相关系和元素分布的实验研究结果。碱金属氟化物。在800-1250°C的宽温度范围内,通过液体不混溶过程研究了盐成分萃取多种矿石元素(Y,REE,Sr,Ba,Ti,Nb,Zr,Ta,W,Mo,Pb)的过程。和1–5.5 kbar的压力。结果表明,分配系数足以使矿石元素集中到矿床成矿所需的数量上。在饱和流体的菱锰矿中,已经确定了两种硅酸盐液体的分离。L相之间多个元素(Sr,La,Nb,Fe,Cr,Mo,K,Rb,Cs)的分配系数已获得图1和L 2。在650–850°C和P = 1 kbar的条件下研究了花岗岩(石英)-矿石-矿物-异相流体(Li,Na,K-氟化物)系统中多相流体的相互作用过程。由于流体与岩石和矿石矿物的相互作用,显示了浓缩了Ta和Nb的高碱性流体饱和的硅酸盐熔体的相的形成。
更新日期:2019-09-17
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