Bauxite Reservoirs at the Contact Zone between Paleozoic and Mesozoic Deposits of the West Siberian Plate

AbstractBauxite rocks of the pre-Jurassic complex of the Urmano-Archinskaya oil and gas zone of the West Siberian Plate, which mainly formed due to redeposition of the products of crust weathering into karst traps, are considered. Igneous rocks of the intermediate composition and shales exposed in erosion–tectonic uplift of the basement to the northeast of the studied area could be the parent rocks. The aluminous composition and reservoir properties of bauxite rocks are due to filtration of hydrothermal solutions at the intermediate or deep burial diagenesis.