Tectonics, basement structures, and minerageny of the southeastern Siberian Platform adjacent to the 3-DV Tommot–Khandyga profile

   Research subject. The southeastern part of the Siberian Platform which is adjacent to the zone where the reference profile 3-DV Tommot–Khandyga runs.

   Aim. To analyze and inteprete new and published geological, geochronological, and geophysical data, as well as presenting the most recent data on tectonics and deep structure of the large basement blocks of the southeastern Siberian Platform based on the new tectonic map of the Lena-Aldan rift zone.

   Materials and methods. Using geophysical techniques, a number of large features were identified under the sedimentary cover varying in thickness from 0.5 km to 3 km, which form the southern part of the extended Lena-Aldan paleorift zone and interpreted as giant stratified basite-hyperbasite abyssolites and alkaline-ultrabasic intrusives emplaced in the Proterozoic as a result of mantle plume magmatism.

   Results. Fundamentally new data were obtained on tectonics and deep structure of the crystalline basement in the southeastern part of the Siberian Platform within the zone of the 3-DV Tommot–Khandyga reference profile and the adjacent areas. A tectonic map of its basement is proposed.

   Conclusions. A high level of knowledge derived from comprehensive geological and geophysical studies within the 3-DV reference profile zone allows us to accept the obtained results and conclusions as a working hypothesis for further medium- and large-scale geological studies and prognostication. The Lena–Aldan rift zone is ranked as a highly productive mineragenic province indicating favorable potential for nickel, copper, chromium, platinum group metals, vanadium, rare earths, and rare metals, which makes it a homologue of the unique Transvaal province of South Africa in terms of its ore potential.

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