Thermal Conductivities of Dry and Water-Saturated Low-Porosity Crystalline Rocks of the Archean Kola Series

Pre-earthquake signals: Underlying physical processes

“…Streaming potentials apply mostly to the top 3-5 km of the crust, where rocks can maintain an open porosity and allow brines to flow even under tectonically stable conditions. Below 5-7 km the lithostatic overload becomes so high that pores tend to close, shutting off most or all fluid flow (Galdin et al, 1986), limiting the development of streaming potentials at greater depths where most crustal earthquakes originate. In addition streaming potentials are very sensitive to the conductivity of the water or saline solution, decreasing rapidly with increasing conductivity.…”

Simulation of heat transfer at the Kola deep-hole site: implications for advection, heat refraction and palaeoclimatic effects

“…We divided the drilled section into seven domains representing the various volcanic, metasedimentary, gneissic and granitic rock sections. Thermal conductivity and heat production of the rock units were taken from Kremenetsky & Ovchinnikov (1986a,b), Arhavskaya et al (1987) and Galdin et al (1986Galdin et al ( , 1987 (Table 3). Thermal conductivity is assumed to depend inversely on temperature, and porosity-weighted specifies elevation variations at 250 feet (76 m) contour fluid-saturated thermal conductivities are updated according intervals ( Fig.…”

“…As the deep hole is only a few kilometres from the local topography taken from an aeronautical map of northern water divide, the FD model is cut-off there. Norway, Finland and Russia (US Air Force 1971), which Hydraulic properties of the bedrock in the deep-drill-hole Thermal conductivity (Wm-' K-I) (Kremenetsky & Ovchinnikov 1986a,b;Galdin et al 1986Galdin et al , 1987.…”