Инд. авторы:	Sharygin V.V.
Заглавие:	A hibonite-spinel-corundum-hematite assemblage in plagioclase-clinopyroxene pyrometamorphic rocks, Hatrurim Basin, Israel: mineral chemistry, genesis and formation temperatures
Библ. ссылка:	Sharygin V.V. A hibonite-spinel-corundum-hematite assemblage in plagioclase-clinopyroxene pyrometamorphic rocks, Hatrurim Basin, Israel: mineral chemistry, genesis and formation temperatures // Mineralogical Magazine. - 2019. - Vol.83. - Iss. 1. - P.123-135. - ISSN 0026-461X. - EISSN 1471-8022.
Внешние системы:	DOI: 10.1180/mgm.2018.138; РИНЦ: 38654212; SCOPUS: 2-s2.0-85060805807; WoS: 000461133700010;
Реферат:	eng: The intergrowths of Fe-rich corundum + Al-rich hematite + spinel + hibonite have been found as an assemblage in a plagioclase-clinopyroxene rock (paralava, former hornfels) at the Hatrurim Basin, Hatrurim combustion metamorphic Formation. Most spinels show oriented exsolution structures and vary from (Mg0.75Fe0.252+)(Al1.80Fe0.203+)O-4 (with exsolutions) to (Mg0.77Fe0.232+)(Al1.95Fe0.053+)O-4 (homogeneous) indicating a tendency towards magnesioferrite and magnetite, and enrichment in NiO (up to 1.9 wt.%) and ZnO (up to 1.4 wt.%). Hibonite is Ti rich (TiO2 > 8 wt.%) and close to CaAl9Fe3+(Mg,Fe2+)TiO19. Corundum varies in Fe2O3 (4.2-11.8 wt.%). Hematite is also inhomogeneous and contains oriented exsolution structures of corundum. It shows variable concentrations of TiO2 (0.7-5.6 wt.%), Al2O3 (0.7-8.6 wt.%), Cr2O3 (0.2-1.5 wt.%), V2O3 (0.1-1.0 wt.%) and MgO (0.3-2.0 wt.%). Crystallization of this specific assemblage is assumed to be at 1000-1200 degrees C using evaluations for the corundum hematite pair with reference to published experimental data. The active role of superheated oxidised volatiles is suggested during both crystallisation of this corundum-bearing association and host-rock transformation (melting event for hornfels -> paralava).
Ключевые слова:	Israel; hornfels; Hibonite; Hatrurim Basin; Geothermometers; Zinc oxide; Titanium dioxide; Nickel oxide; Metamorphic rocks; Magnetite; Magnesia; II-VI semiconductors; Hematite; Feldspar; Chromium compounds; Corundum; Combustion; Aluminum oxide; Alumina; paralava; Israel; hornfels; hibonite; hematite; Hatrurim Basin; corundum-hematite geothermometer; corundum; combustion metamorphism; Corundum deposits; paralava;
Издано:	2019
Физ. характеристика:	с.123-135