Liquid immiscibility in silicate melt inclusion in plagioclase phenocrysts

1981 ◽  
Vol 104 (4) ◽  
pp. 317-324 ◽  
Author(s):  
Anthony R. Philpotts
Keyword(s):  
Melt Inclusion ◽  
Liquid Immiscibility ◽  
Silicate Melt

New results in fluid and silicate melt inclusion research—ECROFI XVII

2005 ◽  
Vol 223 (1-3) ◽  
pp. 1-2
Author(s):  
Csaba Szabó ◽  
Alfons M. van den Kerkhof ◽  
Robert J. Bodnar
Keyword(s):  
Melt Inclusion ◽  
Silicate Melt

scholarly journals Liquid immiscibility and problems of ore genesis (according to experimental data)

2019 ◽  
Vol 27 (5) ◽  
pp. 577-597
Author(s):  
Yu. B. Shapovalov ◽  
A. R. Kotelnikov ◽  
I. N. Suk ◽  
V. S. Korzhinskaya ◽  
Z. A. Kotelnikova
Keyword(s):  
Partition Coefficients ◽  
Liquid Immiscibility ◽  
Ore Deposits ◽  
Silicate Melt ◽  
Distribution Of Elements ◽  
Ore Minerals ◽  
Silicate Liquids ◽  
L1 And L2 ◽  
Salt Systems ◽  
Alkaline Fluid

The results of an experimental study of phase relations and distribution of elements in silicate melt–salt systems (carbonate, phosphate, fluoride, chloride) melt, silicate melt I–silicate melt II, and also in fluid – magmatic systems in the presence of alkali metal fluorides are presented. Salt extraction of a number of ore elements (Y, REE, Sr, Ba, Ti, Nb, Zr, Ta, W, Mo, Pb) was studied in liquid immiscibility processes in a wide temperature range of 800–1250°С and pressure of 1–5.5 kbar. It is shown that the partition coefficients are sufficient for the concentration of ore elements in the quantity necessary for the genesis of ore deposits. In the fluid-saturated melt of trachyrhyolite, 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 has 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 – Ta and Nb concentrator is shown as a result of the reaction of the fluid with the rock and ore minerals.

Liquid Immiscibility in a Silicate Melt

Nature ◽  
1955 ◽  
Vol 176 (4476) ◽  
pp. 305-305 ◽  
Author(s):  
W. A. CASSIDY ◽  
E. R. SEGNIT
Keyword(s):  
Liquid Immiscibility ◽  
Silicate Melt

Atomic scale structural analysis of liquid immiscibility in binary silicate melt: A case of SiO2‒TiO2 system

2020 ◽  
Vol 53 ◽  
pp. 53-60
Author(s):  
Cuiyu Zhang ◽  
Xuan Ge ◽  
Qiaodan Hu ◽  
Fan Yang ◽  
Pingsheng Lai ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Liquid Immiscibility ◽  
Atomic Scale ◽  
Silicate Melt ◽  
Binary Silicate

Formation of the Denchai gem sapphires, northern Thailand: evidence from mineral chemistry and fluid/melt inclusion characteristics

2001 ◽  
Vol 65 (6) ◽  
pp. 725-735 ◽  
Author(s):  
P. Limtrakun ◽  
Khin Zaw ◽  
C. G. Ryan ◽  
T. P. Mernagh
Keyword(s):  
Silicate Glass ◽  
Melt Inclusions ◽  
Melt Inclusion ◽  
Vapour Phase ◽  
Silicate Melt ◽  
Alkaline Magmatism ◽  
Type I ◽  
Northern Thailand ◽  
Pixe Analysis ◽  
Solid Phases

AbstractThe Denchai gem sapphire deposits in Phrae Province, northern Thailand are closely associated with late Cenozoic alkaline basaltic rocks. The sapphires occur in alluvial placer deposits in palaeo-channels at shallow depths. Electron microprobe analysis of minor and trace element contents (Fe, Ti, Cr, Ga and V) of the sapphires indicate the following oxide abundances: Fe2O3 (0.32–1.98 wt.%), TiO2 (0.01–0.23 wt.%), Cr2O3 (<0.01 wt.%), Ga2O3 (0.01–0.03 wt.%) and V2O5 (<0.03 wt.%). Optical studies of sapphires revealed three types of primary fluid/melt inclusions. CO2-rich inclusions (Type I) contain three phases (LH2O + LCO2 + V) with the vapour phase comprising <10–15 vol.%. The presence of CO2 was confirmed by microthermometry and laser Raman analysis. Polyphase inclusions (Type II) (vapour + liquid + solid) contain a fluid bubble (20–30 vol.%), an aqueous phase (10–15 vol.%) and several solid phases. Silicate-melt inclusions (Type III) comprise vapour bubbles, silicate glass and solid phases. Proton-induced X-ray emission (PIXE) analysis revealed high concentrations of K (~;4 wt.%) as well as Ca (~;0.5 wt.%), Ti (~;1 wt.%), Fe (~;2 wt.%), Mn (~;0.1 wt.%), V (<0.03 wt.%), Rb (~;70 ppm) and Zr (~;200 ppm) in the silicate glass. The Ga2O3 abundances and Cr2O3/Ga2O3 values (<1) of the sapphires favour their formation by magmatic processes. The presence of CO2-rich fluids and high K concentrations in the silicate melt inclusions link the origin of the Denchai gem sapphires to CO2-rich alkaline magmatism.

Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt

2017 ◽  
Vol 471 ◽  
pp. 92-110 ◽  
Author(s):  
Vadim S. Kamenetsky ◽  
Michael Zelenski ◽  
Andrey Gurenko ◽  
Maxim Portnyagin ◽  
Kathy Ehrig ◽  
...  
Keyword(s):  
Liquid Immiscibility ◽  
Silicate Melt ◽  
Sulfide Liquid ◽  
Tolbachik Volcano

scholarly journals Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt

2018 ◽  
Vol 478 ◽  
pp. 112-130 ◽  
Author(s):  
Vadim S. Kamenetsky ◽  
Michael Zelenski ◽  
Andrey Gurenko ◽  
Maxim Portnyagin ◽  
Kathy Ehrig ◽  
...  
Keyword(s):  
Liquid Immiscibility ◽  
Silicate Melt ◽  
Sulfide Liquid ◽  
Tolbachik Volcano

Silicate–natrocarbonatite liquid immiscibility in 1917 eruption combeite–wollastonite nephelinite, Oldoinyo Lengai Volcano, Tanzania: Melt inclusion study

Lithos ◽  
2012 ◽  
Vol 152 ◽  
pp. 23-39 ◽  
Author(s):  
Victor V. Sharygin ◽  
Vadim S. Kamenetsky ◽  
Anatoly N. Zaitsev ◽  
Maya B. Kamenetsky
Keyword(s):  
Melt Inclusion ◽  
Liquid Immiscibility ◽  
Oldoinyo Lengai ◽  
Inclusion Study

Microstructural Analysis of SiO2-Al2O3 Glasses

1982 ◽  
Vol 40 ◽  
pp. 562-563
Author(s):  
C. M. Jantzen ◽  
D. G. Howitt
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Microstructural Analysis ◽  
Liquid Immiscibility ◽  
Metastable Region ◽  
Transmission Electron ◽  
Liquidus Temperatures

The mullite-SiO2 liquidus has been extensively studied, and it has been shown that the flattening of the liquidus is related to the existence of a metastable region of liquid immiscibility at sub-liquidus temperatures which is detectable by transmission electron microscopy (TEM) (Fig. 1).

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