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Anabar Shield
The Mal’dzhangarka Carbonatite Massif (Anabar Shield): The Age of Magmatism and Mineralization (U–Pb and Re–Os Isotope Systems)
Carbonatite-Like Rock in a Dike of the Aikhal Kimberlite Pipe: Comparison with Carbonatites of the Nomokhtookh Site (Anabar Area)
Geodynamic Characteristics of Neotectonic Structures in the Olenek and Vilyui Areas of the Yakutian Kimberlite Province
Recent crustal uplift of Precambrian cratons: key patterns and possible mechanisms
Basites of the Vilyui paleorift: geochemistry and sequence of intrusive events
Abstract Radon-222 and carbon dioxide (CO 2 ) emissions were studied around four remote Nepalese thermal springs near the Main Central Thrust: Timure and Chilime in the upper Trisuli Valley, central Nepal; and Sulighad and Tarakot in Lower Dolpo, western Nepal. A total of 279 radon fluxes and 670 CO 2 fluxes were measured on the ground, complemented by radon concentration measurements in soil and water, and assisted by thermal infrared imaging. In Lower Dolpo, mean radon fluxes ranging from 270×10 −3 to 450×10 −3 Bq m −2 s −1 , radon concentration in water greater than 100 Bq l −1 , low mean CO 2 fluxes (18–32 g m −2 day −1 ), and integrated radon and CO 2 discharges of 70–180 Bq s −1 and (2.3–3.8)×10 −3 mol s −1 , respectively, suggest shallow-water-dominated transport with simultaneous radon and CO 2 degassing from the hydrothermal water. In the upper Trisuli Valley, mean radon fluxes ranging from 140×10 −3 to 570×10 −3 Bq m −2 s −1 , larger mean CO 2 fluxes that range from 430 to 2930 g m −2 day −1 , radon concentration in water of less than 6 Bq l −1 , and integrated radon and CO 2 discharges of 290–840 Bq s −1 and (390–830)×10 −3 mol s −1 , respectively, indicate fast gas-dominated transport of deep metamorphic-origin CO 2 charged in radon along a fault network. Radon can thus give precious information on the gas transport properties of the shallow continental crust. Supplementary material: Additional radon and carbon dioxide flux measurement profiles are available at https://doi.org/10.6084/m9.figshare.c.3582128
Mineral composition of alkaline lamprophyres of the Tomtor massif as reflection of their genesis
The 1501 Ma Kuonamka Large Igneous Province of northern Siberia: U–Pb geochronology, geochemistry, and links with coeval magmatism on other crustal blocks
Extraterrestrial factors and their role in the Earth’s tectonic evolution in the Early Precambrian
Main minerals of abnormally high-grade ores of the Tomtor deposit (Arctic Siberia)
Mineral inclusions in Fe–Pt solid solution from the alluvial ore occurrences of the Anabar basin (northeastern Siberian Platform)
Mineralogical criteria for the diamond potential of Upper Triassic placers on the northeastern margin of the Siberian Platform
Jurassic and Cretaceous stratigraphy of the Anabar area (Arctic Siberia, Laptev Sea coast) and the Boreal zonal standard
The Kotuikan ring structure as possible evidence for a large impact event in the northern Siberian craton
Apatite-bearing greenstone belts in Russia
Abstract The Siberian craton consists of crystalline rocks and superimposed Precambrian sedimentary rocks deposited in rift basins. Palaeozoic rocks, mainly carbonates, were deposited along the margins of the craton to form an outwardly younger concentric pattern that underlies an outward-thickening Mesozoic sedimentary section. The north and east margins of the Siberian craton subsequently became foreland basins created by compressional deformation during collision with other tectonic plates. The Tunguska Basin developed as a Palaeozoic rift/sag basin over Proterozoic rifts. The geological provinces along the north and east margins of the Siberian craton are immature with respect to exploration, so exploration-history analysis alone cannot be used for assessing undiscovered petroleum resources. Therefore, other areas from around the world having greater petroleum exploration maturity and similar geological characteristics, and which have been previously assessed, were used as analogues to aid in this assessment. The analogues included those of foreland basins and rift/sag basins that were later subjected to compression. The US Geological Survey estimated the mean undiscovered, technically recoverable conventional petroleum resources to be c. 28 billion barrels of oil equivalent, including c. 8 billion barrels of crude oil, 103 trillion cubic feet of natural gas, and 3 billion barrels of natural gas liquids.