HR: 1340h
AN: MR13C-1409    [Abstracts]
TI: Thermophysical peculiarities in rocks of Earth's crust
AU: * Sidorova, O
EM: sidorova_olga2007@yandex.ru
AF: National University of Uzbekistan, 49,N.Khodjibaeva str., Tashkent, 100041, Uzbekistan
AB: This paper is devoted to a study of thermophysical properties of rocks uncovered by SG-10 deep borehole in the large gold ore deposit Muruntau /Western Uzbekistan/. The results of determination of thermal conductivity (ë,W/mK) and thermal capacity (c,J/kgK), based on 1528 bore specimens taken each 10 meters within the interval of 0-4296m, served as a basis for division of the section of Muruntau SG-10 deep hole rocks into thermophysical complexes. If division of the section is considered from a point of view of a specific character of its thermophysical features, there are three distinct complexes: the first one occupies a interval from the hole's mouth to a depth of 1000m, and is characterized by increased mean values of thermal conductivity within 2.9-3.2 W/mK, and gradient temperature raise of thermal capacity with depth from 560 to 750 J/kgK. The second one is within the interval of 1000-2500m. It is remarkable for its decrease in thermal conductivity level, especially in roof and foot parts (up to 1.30-1.45 W/mK), and for mean values of thermal capacity within 750-780 J/kgK, as well as for direct correlation between thermal conductivity and thermal capacity in some local anomalies, while, on the whole, correlations of these parameters are inverse for the section. The third complex is below 2500m. It is characterized by the lowest mean thermal conductivity (1.6 W/mK) and the highest thermal capacity (1250 J/kgK). What is thermophysical features distribution zoning explained by? There was a thermal field – one of basic factors in ore components activization and redistribution, their concentration and zoning formation within the intrusion area of the Muruntau granitoid intrusive (C3-P1). Magmatic activization produced a strong heat impulse, which resulted in the appearance of zones of permeability with high thermal and temperature conductive features favourable for energy transfer and removal of some active chemical components. The result of the influence of the Muruntau intrusive thermal field is redistribution of thermophysical parameters.
DE: 1020 Composition of the continental crust
DE: 3665 Mineral occurrences and deposits
DE: 3949 Thermal expansivity
SC: Mineral and Rock Physics [MR]
MN: 2007 Fall Meeting