Placer-forming flows and mudflows as viscous fluids in river valleys

Russian Geology and Geophysics - Tập 56 - Trang 1749-1756 - 2015
A.A. Buiskikh1
1Northeast Interdisciplinary Scientific Research Institute, named after N.A. Shilo, Far Eastern Branch of the Russian Academy of Sciences, ul. Portovaya 16, Magadan, 685000, Russia

Tóm tắt

Abstract The paper is concerned with geologic processes in river valleys, such as the movement of alluvial placers and mudflows, regarded as viscous fluids. The dynamics of distribution of the placer mineral and mud-and-gravel material in a river valley was studied by modeling. Moving material was examined as an independent flow of solid particles (solid flow), free of the enclosing rocks. The flow–environment interaction was specified by mass forces, friction forces, and substance sources (drains). For the mathematical description of a solid flow, a set of viscous-liquid equations was used. The placer and mudflow parameters obtained during the numerical experiments agree satisfactorily with the full-scale data for real objects.

Tài liệu tham khảo

Bilibin, 1955, Fundamentals of Placer Geology [in Russian] Bozhinskii, 2002, Statistical modeling of the dynamics of slushflows, Vestnik Mosk. Gos. Univ., Ser. 5, Geografiya, 5, 39 Bulgakov, V.S. , 1984. On the theoretical model for formation of alluvial gold placers, in: Problems of Continental Placer Formation (Proc. VI All-Union Conf. on Placer Geology) [in Russian]. Izd. DVNTs AN SSSR, Vladivostok, pp. 18–24. Chalov, 2001, Soil Erosion and Riverbed Evolution [in Russian] Chalov, 2008, Makkaveev’s theory of a single erosion–accumulation process and theory of erosion–riverbed systems, Geomorfologiya, 3, 6 Knunyants, 1998, Chemical Encyclopedia [in Russian], 1 Chernomorets, 2012, Numerical simulation of disastrous mudfows, rock slides, and landslides with the use of a 3D discrete model, GeoRisk, 1, 16 Eglit, 1986, Unstable Motion in Riverbeds and on Slopes [in Russian] Filippov, V.E. , 1999. Modeling Gold Placer Formation. Extended Abstract Doctoral (Geol.–Mineral.) Dissertation. Inst. Mining North, Yakutsk. Fletcher, 1988, Computational Techniques for Fluid Dynamics, 1 Gebhart, 1988, Buoyancy-Induced Flows and Transport, 1 2012, Gold-2011. Annual report of the Union of Gold Producers, Zoloto i Tekhnologii, 2 Gol’dfarb, Yu.I. , 2009. Dynamics of Formation, Classification, and Age of Alluvial Gold Placers in Northeastern Asia. Extended Abstract Doctoral (Geol.–Mineral.) Dissertation. SVKNII DVO RAN, Magadan. Goncharov, 2002, The Natalka Gold Deposit [in Russian] 2012, Guidelines on “Classification of Deposit Reserves and Predicted Solid Mineral Resources: Placer Deposits” [in Russian], 2007 Kartashov, 1972, The Main Regularities of Geologic Activity of Rivers in Mountain Regions (by the Example of the Northeastern Soviet Union) [in Russian] Kocheryan, 2009, Deformation in Rock Massifs: Handbook [in Russian] Kondrat’ev, 2004, Relative Transporting Capacity and Other Riverbed Formation Factors Kondrat’ev, 1982, Fundamentals of the Hydromorphological Theory of Riverbed Evolution [in Russian] Korchuganova, 2010, Placer Geology: Guidelines [in Russian] Larionov, 2008, Mechanisms of lateral erosion in rills on slopes, Eurasian Soil Sci., 41, 294, 10.1134/S1064229308030071 Litvinenko, 2002, Gold Placer Deposits of the Omchak Cluster [in Russian] Lykov, 1978, Heat and Mass Transfer: Handbook [in Russian] Makkaveev, 1986, Riverbed Evolution [in Russian] Mavlyudov, 2011, Genaldon ice blockage destruction (Northern Ossetia) in 2002–2006, Earth Cryosphere, 15, 68 Mit’kin, 2014, Report of the Head of the Department of Natural Resources of the Magadan Region Oran, 1987, Numerical Simulation of Reactive Flow Petrakov, 2013, Changes in the area of Genaldon glacial disaster in 2002–2010, Earth Cryosphere, 17, 35 Petrov, 2012, Mudflow Studies [in Russian] Popovnin, 2003, The 2002 glacial catastrophe in North Ossetia, Earth Cryosphere, 7, 3 Samarskii, 1977, The Theory of Difference Schemes [in Russian] Samusikov, V.P. , 2000. Spatial distribution of gold in some placers of the Bol’shaya Kuobakh-Baga river basin, in: Placers, Sources, Their Genesis and Prospects (Proc. Conf. in Honor of the 90th Anniversary of I.S. Rozhkov and Yu.N. Trushkov) [in Russian]. Izd. YaNTs SO RAN, Yakutsk, pp. 134–143. Shilo, 2000, Bases of the Study about the Placer [in Russian] Shkadov, 1967, Wave modes of flow of a thin layer of viscous fluid, Izv. AN SSSR. Mekhanika Zhidkosti i Gaza, 1, 43 Simonov, Yu.G., Simonova, T.Yu., 2014. The river basins: their place and function in the system of the processes of biosphere, in: Ecological and Geographical Studies in the River Basins. Materials of the Fourth All-Russian Practical-Scientific Conf. Voronezh. Pedagog. Univers. Voronezh, pp. 21–31. Smirnov, 2012, The Verkhoyansk-Chukchi area of the recent orogeny: zoning and the main formation stages, Russian Geology and Geophysics (Geologiya i Geofizika), 53, 467, 10.1016/j.rgg.2012.03.007 Sorokhtin, 2002, The Earth’s Evolution [in Russian] Takabaev, M.K. , 1996. Numerical Simulation of a Mudflow. Extended Abstract Doctoral (Phys.–Math.) Dissertation. Kazakh National Univ., Almaty. Talapov, 2007, A geoecological basis of the scale of the destruction potential of water erosion and mudflow, Vestnik KazNTU, 5, 9 Trofimov, 1965, Placer Geology [in Russian] Trofimov, 1980, Fundamentals of Placer Geology [in Russian] Trushkov, 1975, Location of a primary source and experience in its reconstruction, in: Gold Sources: Search and Experience in Reconstruction Based on Prospected Placers [in Russian], 50 Vinogradova, 2009, Riverbed Evolution and Formation of Alluvial Gold Placers [in Russian] Yakhiyaev, 2008, Mathematical modeling of mudflow movement, Vestnik Natsional’noi Inzhenernoi Akademii Respubliki Kazakhstan, No., 1, 45