As a result of integral investigation of the Paleoproterozoic magmatic complexes the trend of remagnetisation has been obtained. The direction of remagnetisation was propagated from North-West to the South-East. Probably, the new trend of remagnetisation reflects the strike of Paleoproteorozoic collision. Correlation between remagnetisation processes and composition of the rocks have been deduced. Probably the extent of keeping of early and late secondary components is caused not only with protolithic composition but with different transformations of the rocks including whose fluid saturation.

Geomorphological units of Madagascar were established on the basis of structural-geomorphological analysis. The article contains description of these units and their relationship to general geological structure of the island.

The distribution of admixed Cr⁶⁺ in 25 vanadate, phosphate and arsenate minerals from the oxidation zone of six ore deposits of the Urals has been studied based on the data of more than 600 electron microprobe analyses. There are lead minerals belonging to the brackebuschite, apatite, adelite, and tsumcorite groups and to the alunite supergroup alunite, as well as carminite, cornwallite and baildonite. Vanadates and arsenates with brackebuschite-type structures show the greatest affinity to Cr⁶⁺. The maximum content of admixed Cr⁶⁺ is observed in minerals that include as the dominant trivalent cations Fe³⁺ (ferribushmakinite, arsenbrackebuschite, gartrellite) or Al³⁺ (plumbogummite, bushmakinite). The prevailing scheme of isomorphous substitutions involving chromium in these minerals is heterovalent: Cr⁶⁺ + M²⁺ → T⁵⁺ + M³⁺ (where T = V, As, P; M³⁺ = Fe, Al; M²⁺ = Cu, Zn), whereas a role of isovalent substitutions Cr⁶⁺ → S⁶⁺ or Cr⁶⁺ → Mo⁶⁺ in the oxysalt minerals formed in the Ural deposits is insignficant.

A system of equations of thermobarometer for Cromian spinel - silicate melt equilibrium was obtained by multiple linear regression of 234 experimental data of the solubility of chromian spinels in basaltic melts. Equation reproduces with small error experimental data in a wide range of basalt compositions, temperatures and pressures. Verification of thermobarometers showed the maximum error in liquidus temperature reproducing does not exceed ±12 °C. The level of cumulative Cr-spinels appearance in the vertical structure of Burakovsky intrusion predicted with the error ±50 m.

A magnetotelluric data processing code has been developed, which demonstrates high robustness to intense electromagnetic noise occurring in measured MT data. Key features of the code are specific approach for estimating different transfer functions and capability to utilize all four channels acquired at remote reference station. The code utilizes various techniques to reduce estimate errors, including robust Huber estimator, jackknife approach, improved remote reference technique and compensating for overestimation of power spectra. The proposed code has shown high efficiency in processing of low signal-to-noise data.

We consider the geological conditions of the location and the chemical composition of water carbon source Firuza MGU opened in 2015 in the North Pamirs. A detailed mikromponentny composition of water produced by ICP-MS, and compares it with similar content of microcomponents in waters carbonic sources of Kamchatka and the Far East. On the basis of the ratio B:Cl and the ratio of K:Li:Rb:Cs, close to the same relationship to chloride-sodic term areas of active volcanism, concluded that the origin of the deep water source. The calculation of the temperature of formation water obtained by the Na-K geothermometer method showed the importance 147,3^oC, suggesting the formation of a source of water at a depth of about 5 km.

The article shows results of test electrical surveys conducted on one of deposits of Western Kazakhstan. Digital geoelectric model and test sections of the area were constructed by the results of processing and interpretation of electrometric data. Effective using of MT sounding with complex of seismic and well- logging data for classification of a geological structure and allocation of prospective oil and gas areas ofterrigeneusly-sedimentary deposits of Mesozoic period is also shown in the article.

Essentially new method of allocation of diamondiferous kimberlite pipes against surrounding rocks is proposed. The method is based on interpretation of multispectral satellite images LANDSAT-7 ETM+ and allows to localize the most promising areas within perspective sites revealed by other methods. It was demonstrated that application of GIS-technologies for complex use of geological, geophysical, mineralogical data and results of interpretation of satellite images is efficient in forecasting kimberlite diamond deposits in both studied areas and poorly explored territories.