Многометальное Адрасман-Канимансурское рудное поле (Таджикистан) и его рудообразующая система: I – геология, минералогия, структурные условия рудоотложениястатья
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Дата последнего поиска статьи во внешних источниках: 23 августа 2019 г.
Аннотация:: Principal features of the geology, mineralogy, and geodynamic conditions of the ore deposition at the Adrasman-Kanimansur ore field, one of the biggest ore fields in the Central Tyan Shan Mnts., are discussed. This ore field contains a great variety of ore metals (Ag, Pb, U, Cu, Bi, Zn, F), but the silver-base-metal and uranium mineralizations predominate. In the forthcoming, second paper, physicochemical, thermobarometric, and geochemical features of the ore deposition will be discussed, and the model will be proposed of the hydrothermal ore forming system that has deep roots and complex evolution path. The ore was deposited due to effervescence of an ascending deep fluids that were mixed with meteoric waters. The temperature of ore deposition varies in the interval 120-270 degrees C, solution acidity was pH = 5 +/- 1, and activity of the sulfur and oxygen corresponded to the tripple point hematite + magnethite + pyrite. The variability of the mineral ore types relates to the polystage ore deposition. The last depends, in turn, on the high tectonic activity in the crustal block resulting in the periodic opening of the deep seated fluid collectors. These collectors are reservoirs where ore-bearing fluids are collected, developed, and differentiated. It is proposed that such collectors were distributed at several deep levels, related to the structure and evolution trends of the fluid-magmatic system.