magnetic minerals and characteristics of natural magnetic state of core in Saatly superdeep hole in depth range 3500-7500 meters

The SG-1 Saatly superdeep hole is one of the 15-km holes being drilled or which will be drilled for studying the deep structure of the earth's crust. This article presents data on magnetic minerals, carriers of natural remanent magnetization and determinations of the conditions under which they originated. Core rocks from depths of 3,500-7,500 m were used in the study. These are andesites, andesite-basalts, basalts, decites and others (a total of 120 samples were analyzed). Data on Curie temperatures (T sub C) and other parameters were analyzed in depth. The constancy of the composition of magnetic minerals (magnetite with T sub C = 575-585 C, magnetite with a low content of titanium with T sub C = 520-550 C and oxidized magnetite with T sub C = 600 C), found in the entire studied depth range, and its stability to temperature effects indicate not only a predominance of high-temperature oxidation, but also a constancy of conditions at the source of removal of the material.