Инд. авторы:	Sidorov E.G., Borovikov A.A., Tolstykh N.D., Bukhanova D.S., Palyanova G.A., Chubarov V.M.
Заглавие:	Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation
Библ. ссылка:	Sidorov E.G., Borovikov A.A., Tolstykh N.D., Bukhanova D.S., Palyanova G.A., Chubarov V.M. Gold Mineralization at the Maletoyvayam Deposit (Koryak Highland, Russia) and Physicochemical Conditions of Its Formation // MINERALS. - 2020. - Vol.10. - Iss. 12. - Art.1093.
Внешние системы:	DOI: 10.3390/min10121093; WoS: 000602338800001;
Реферат:	eng: Microthermometry study of fluid inclusions in quartz veins of the Maletoyvayam deposit (Koryak Highland, Russia) was carried out. This epithermal gold deposit contains unique Au compounds including maletoyvayamite, which has not been reported anywhere else. Two paragenetic mineral associations (pyrite-quartz and maletoyvayamite-quartz) with quartz of different generations corresponding to different pulses were also described. Only early generations of quartz (Q(1)) include ore minerals: pyrite for the first mineral assemblage, and in Au-bearing minerals, sulfosalts, bismuthinite, and others-for the second assemblage. A study on fluid inclusions in quartz showed a salinity (mainly NaCl + KCl) range from 0.2 to 4.3 wt.% NaCl eq., increasing from the first mineral association to the second due to boiling fluids. The obtained temperature variations for quartz crystallization were 295-135 degrees C, the fluid pressure ranged from 79 to 4 bar. On the other hand, the range of conditions obtained for the gold productive ore association is more narrow: salinity of the fluid inclusions is 4.3 wt.% NaCl eq., the temperatures vary from 255 degrees C to 245 degrees C, and the pressure from 39 to 32 bar. These physicochemical characteristics of the Maletoyvayam ore deposit greatly coincide with other HS-type epithermal deposits; however, within the Central Kamchatka Volcanic Belt it is so far the only deposit of this type reported.
Ключевые слова:	MINERALOGY; ENVIRONMENT; GEOCHEMISTRY; PORPHYRY; SYSTEM; SOUTH KAMCHATKA; FLUID INCLUSIONS; TE MINERALIZATION; EPITHERMAL DEPOSIT; gold; fluid inclusions; maletoyvayamite-quartz association; HS epithermal deposit; Central Kamchatka Volcanic Belt; LEPANTO;
Издано:	2020
Физ. характеристика:	1093