UDC (552.3:551.21):551.76/.77+(553.2:551.763/.783)(571.1) |
MESOZOIC-CENOZOIC TECTONIC MAGMATIC ACTIVATION AND LATE CRETACEOUS-PALEOGENIC ORE-LITHOGENESIS IN THE CIS-YENISEI ZONE OF THE WEST-SIBERIAN PLATE. Pt. 2
G. N. Cherkasov, N. V. Belyaev
The authors have revealed that the autochthonous Aptian-Cenomanian bauxites in the southern Cis-Yenisei part of the West-Siberian Plate correspond to the allochthonous volcanogenic Albian-Cenomanian bauxite-bearing interval in the northern part of the platform, which was formed by explosion-derived ore material of the Triassic ferrous bauxites with hydrargillite-hydrogoethite colloid cement and hematitemagnetite peas containing corundum-diaspore concretions. The paper contains mineralogical and petrographic description of volcanogenic-sedimentary deposits in the Cis-Yenisei zone that host thick iron accumulation, which forms the world-largest hydrothermal-sedimentary West-Siberian iron-ore-bearing basin.
Key words: volcanism, thermal springs, underwater bursts, hydrogoethite ore, bauxite, siderite, hydrohematite, hydrargillite, corundum, diaspore, genesis, phosphates, leptochlorite, quartz, microcline.