PETROLOGY, PETRO-GEOCHEMISTRY AND ORE MINERALIZATION OF TIMOFEEV STOCK OF GORNYY ALTAI
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Abstract
The new data on the geological building, ore mineralization, composition, petrology, absolute age and petro-geochemistry of Timofeev stock of Gornyy Altai lead in paper. The absolute age of gabbroids of lower phase intrusion of stock determined 400 mln years, that it is correspond of Lower Devonian. Nd-model age of protolith at melting of gabbroids compose 893 mln years, that it characterize for transit zone from Middle Paleozoic consolidation to Altai – Mongolian terrain. The wall rocks of Timofeev stock has presumably Middle Ordovician age on analogy with volcanogenic-sedimentary section, injecting near arrangementing Vladimir sill. Rocks of Timofeev stock carry to calc-alkali and shoshonitic series. Geodinamic aspect of magma-generating interpreted by missing of alkali ocean basalts of plum settings and normal of ocean basalts middle-ocean ridges, had in evolution of Paleo-Asian ocean in Lower Paleozoic. Sm-Nd isotope marks of gabbroids point out on nearness of it values to chondrite meteorites. Ratio of isotopes neodium with age of gabbro point out on that under Korgon trough in Lower Paleozoic existed isotope distinctive earth crust, close to depletation mantle. Forming Timofeev skarn iron deposit related with of the same name intrusive stock of space and paragenetic. New discover prospects skarn iron Juzhnoe and porphyry iron manifestation Vodorazdelnoe characterized high concentrations of gold and scandium.
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