Инд. авторы:	Prokopev I.R., Borovikov A.A., Pavlova G.G., Borisenko A.S.
Заглавие:	The role of chloride-carbonate melts in the formation of Sideritic Carbonatites of the Karasug Fe-F-REE deposit (Tyva Republic, Russia)
Библ. ссылка:	Prokopev I.R., Borovikov A.A., Pavlova G.G., Borisenko A.S. The role of chloride-carbonate melts in the formation of Sideritic Carbonatites of the Karasug Fe-F-REE deposit (Tyva Republic, Russia) // Doklady Earth Sciences. - 2014. - Vol.455. - Iss. 2. - P.446-449. - ISSN 1028-334X. - EISSN 1531-8354.
Внешние системы:	DOI: 10.1134/S1028334X14050092; SCOPUS: 2-s2.0-84902982682; WoS: 000335769200019;
Реферат:	eng: The authors have studied melt-fluid and fluid inclusions in quartz and fluorite of sideritic and ankerite-calcitic carbonatites of the Karasug ore field, as well as melt inclusions in apatite from granosyenites. The content of salt and fluid components in brine-melt inclusions was evaluated on the basis of the thermodynamic data, the calculations of volumes and densities of the solid phases, a solution of about 50% concentration, and the gas phase of the inclusions, as well as the results of the LA-ICP-MS analysis. The content of salt phases, the solution, and the gas phase amounted to 85-70, 10-25, and about 5% of the inclusion substance, respectively. The total percentage of salt and fluid components (H2O and CO2) amounted to 90- 80 and 10-20 wt %, respectively. The fraction of a carbonate constituent in the inclusions was as high as 45- 50% and over in ankerite-calcite carbonatites and about 15 wt % in sideritic carbonatites. The 117.2 ± 1.3 Ma age of these carbonatites by 40Ar/39Ar, along with other datings for this area, shows that their formation was associated with a manifestation of the Cretaceous alkaline-mafic magmatism (117-120 Ma). The presented model of the formation of carbonatites is in agreement with the sequence of the development of magmatic processes and mineralization in this area. The model is also confirmed by the results of the studies of melt and fluid inclusions in minerals. © Pleiades Publishing, Ltd., 2014.
Ключевые слова:	siderite; rare earth element; quartz; ore deposit; mineralization; magmatism; iron; fluorite; fluid inclusion; concentration (composition); chloride; carbonatite; carbonate; calcite; ankerite; Tuva; Thermodynamic data; Solid phasis; Melt inclusions; Magmatic process; LA-ICP-MS analysis; Fluid inclusion; Fluid components; Carbonatites; Quartz; Phosphate minerals; Inductively coupled plasma mass spectrometry; Gases; Chlorine compounds; Carbon dioxide; Mineralogy; Russian Federation;
Издано:	2014
Физ. характеристика:	с.446-449