Method of prospecting deposits of rare-earth elements in bauxite-bearing formations
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Method of prospecting deposits of rare
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Method of prospecting deposits of rare-earth elements in bauxite-bearing formations Abstract
FIELD: geology. SUBSTANCE: method involves the steps of: detecting carbonaceous deposits of continental lacustrine-alluvial facies on area of development of bauxite-bearing formation, taking samples in investigated sections, determining contents of aluminium (Al2O3), silicon (SiO2) and organic substance, calculating ratio M= Al2O3/SiO2 and determining the presence of ore bodies of rare-earth elements from the obtained values. EFFECT: enhanced reliability and efficiency. 1 tbl, 2 dwg Images (3)   
RU2006047C1 Russia Download PDF Find Prior Art Similar Other languages Russian
Inventor Адольф Вольдемарович Лейпциг Владимир Наумович Вильшанский Олег Тюрбеевич Мухлаев Worldwide applications 1992 RU Application events 1992-04-23 Application filed by Адольф Вольдемарович Лейпциг, Владимир Наумович Вильшанский, Олег Тюрбеевич Мухлаев 1992-04-23 Priority to SU5039696 1994-01-15 Application granted 1994-01-15 Publication of RU2006047C1 Info
External links Espacenet Global Dossier Discuss Description translated from Russian The invention relates to geological prospecting methods fields of rare earth metals and can be used in the identification and evaluation of the rare earth (Sc, Y, ETR) deposits formed in bauxite formations. There are known methods of searching rare metals, including rare earth mineralization based on the selection of a specific system profiles naked and mines and determining their content of minerals, which are associated with the accumulation of rare-metal objects related placers, with some types of intrusive rocks and weathering crusts. These methods are not applicable in cases when accumulation of rare metals with no accessory is connected, and with the main rock-forming minerals. The closest the technical essence and achieved result of the proposals is a method comprising layered (interval standardized) selection lithochemical samples along sections of the studied sequences (outcrop and core data mining) and direct determination of their content elements, including rare earth. A method of time-consuming, t. To. The associated with the implementation of large amounts of costly chemical-analytical works. In addition, this method is not effective in the search for rare earth deposits in bauxite formations spread over vast areas (hundreds of km 2) and great depth, t. To. Requires very large amounts of mining and drilling, oprobovatelskih and analysis. The invention aims to increase the efficiency of searches of deposits of rare earth elements in the bauxite formations due to the localization of prospecting area, reducing the volume of works and exceptions oprobovatelskih expensive analytical work to determine the content of the rare earths. The goal is achieved in that the rare earth deposits search method comprising stratified sampling of the studied sections in bauxite formation recovered carbonaceous deposits are inland lake-alluvial (oxbow) facies them sampled in determining the silicon module (M Si = Al 2 O3 / SiO 2) and organic matter content C org. , And M Si values from 2 to 10 and C org. more than 3, judged on the presence of rare earth deposits. The method is based on these established authors, the laws of:
2. Scandium - rare earth mineralization in reducing environment is formed as part of the lake-alluvial (oxbow) facies represented generally gray, dark gray and black in varying degrees carbonic rocks. Significant concentration of scandium and the rare earth elements are often observed in the reductive geochemical barrier - in the zone of transition from a gray-colored red rocks carbonaceous. The content of scandium, yttrium, they often reach 0.2-0.3% (first kilograms per ton). 3. The contents of scandium and yttrium in the gray-colored rocks bauxite complex also varies over a wide range - from values close to Clarke (20-30 g / t), to the first kilograms per tonne - but in general terms determined by the content in organic rocks substances (see. FIG. 1, which presents the content of yttrium and scandium in rocks, in varying degrees, converts organic matter). Red, pink and white rock bauxite complex typically contain C org. less than 1%, and are characterized by Clarke or slightly higher contents of Sc, Y, ΣTR. The gray-colored carbonaceous rocks C org. = 4-14%. Scandium and yttrium content is always greater than 0.01% (100-140 g / t). 4. Scandium - rare earth mineralization associated with the gray-colored allitol and bauxite, characterized silicon module (M Si) from 2 to 10, yttrium and scandium content in rocks always exceed 0.01% (see Figure 2, which presents the content and scandium.. yttrium in rocks with different M Si). The gray-colored kaolinite or a kaolinite-hydromicaceous clays with Si content of less than 1 unit of scandium, or yttrium is typically less than two-three Clarke (50-75 g / ton). Increasing the content of these metals is characteristic of clay, bauxite and shoddy allite deposits a silicon unit 2-10, and the highest concentrations of - 200 mg / kg - for bauxites with a silicon modulus of from 3.0 to 7.5. EXAMPLE EXAMPLE. On the search area (≈2000 km 2) in northern Kazakhstan Amangeldy district, in the bauxite formation were isolated complexes of alluvial and lacustrine-alluvial facies, performing ancient Paleocene-Eocene of the valley, isolated and delineated generally gray-colored carbonated sediments of facies - oxbow sediments operating central, the deepest part of the ancient valleys. Carbonaceous deposits have been tried in cores of core holes in the samples (chemical methods) were determined content C org. , Al 2 O 3 and SiO 2. According to the determination result (shown in Table I) have been delineated: (1) the accumulation of gray and black allite deposits and bauxite M Si of 2 to 10 and the TOC content. over 3 serving as the rare earth potential field, with an average content of ores: Sc - 158 g / m, Y - 240 g / m, ΣTR - 1200 g / m, (2) the zone rich rare earth ores, characterized by M Si = 3- 7.5 and C org. from 5 to 25 and the contents in the ore - Sc - 1860 g / m, Y - 550 g / m, ΣTR - 1500 g / t. The presence of deposits is confirmed by the subsequent detailed exploration. The proposed method allowed to localize the area of prospecting and exploration of rare earth deposits and cut ten times the volume of analytical work. (56) Fundamentals prediction, searches and prospective evaluation of tantalum and niobium deposits. Moscow: Nedra, 1983, pp. 120-167. Handbook on geochemistry. Moscow: Nedra, p. 441. Claims (1) Hide Dependent translated from Russian METHOD FOR SEARCH DEPOSITS OF RARE EARTH ELEMENTS IN bauxite formation comprising sampling, analysis and judgment based on its results the presence of the deposit, characterized in that the samples are taken in carbonaceous lacustrine alluvial deposits define therein an aluminum content (Al 2 O 3), silicon (SiO 2) and organic matter (C org.)calculated ratio M = Al 2 O 3 / SiO 2 and if the condition 2 Cited By (1) Publication numberPriority datePublication dateAssigneeTitle CN104459083A *2014-11-282015-03-25武汉工程大学Mineral prospecting method for middle and heavy rare earth enrichment area of weathered crust elution-deposited rare earth ore Family To Family Citations * Cited by examiner, † Cited by third party, ‡ Family to family citation Similar Documents PublicationPublication DateTitle Obradovich et al.1968Geochronology of the Belt series, Montana Adams et al.1958Thorium-to-uranium ratios as indicators of sedimentary processes: example of concept of geochemical facies Kanasewich1968Precambrian rift: genesis of strata-bound ore deposits Bordenave et al.1993Screening techniques for source rock evaluation Ross et al.2003Provenance of the Mesoproterozoic (1.45 Ga) Belt basin (western North America): Another piece in the pre-Rodinia paleogeographic puzzle Spivack et al.1987The sedimentary cycle of the boron isotopes Cobban1945Marine Jurassic Formations of Sweetgrass Arch, Montana Ross et al.1992Provenance and U-Pb geochronology of the Mesoproterozoic Belt Supergroup (northwestern United States): Implications for age of deposition and pre-Panthalassa plate reconstructions Chowns et al.1983Pre-Cretaceous rocks beneath the Georgia coastal plain Wronkiewicz1989Geochemistry and provenance of sediments from the Pongola Supergroup, South Africa: evidence for a 3.0-Ga-old continental craton JENKYNS et al.1997Lower Jurassic epicontinental carbonates and mudstones from England and Wales: chemostratigraphic signals and the early Toarcian anoxic event Gehrels et al.1995Detrital zircon reference for Cambrian to Triassic miogeoclinal strata of western North America Hanson et al.2001Upper Oligocene lacustrine source rocks and petroleum systems of the northern Qaidam basin, northwest China Gauthier-Lafaye et al.1989The Francevillian (lower Proterozoic) uranium ore deposits of Gabon Gale1995Cyclostratigraphy and correlation of the Cenomanian Stage in Western Europe Page1970Sur-Nacimiento fault zone of California: Continental margin tectonics Dallmeyer et al.1987Polyphase late Paleozoic tectonothermal evolution of the southwestern Meguma Terrane, Nova Scotia: evidence from 40Ar/39Ar mineral ages Genik1993Petroleum geology of Cretaceous-Tertiary rift basins in Niger, Chad, and Central African Republic Gerrard et al.1982Post-Paleozoic Succession and Structure of the Southwestern African Continental Margin: Rifted Margins: Field Investigations of Margin Structure and Stratigraphy Raiswell et al.1988Degree of pyritization of iron as a paleoenvironmental indicator of bottom-water oxygenation Matthews et al.1987Mantle-derived volatiles in continental crust: the Massif Central of France Bishop1988Petroleum geology of east-central Tunisia Kessen et al.1981Gangue mineral 87 Sr/86 Sr ratios and the origin of Mississippi Valley-type mineralization Eicher et al.1989Origin of the Cretaceous Bridge Creek cycles in the western interior, United States Halgedahl et al.1987Paleomagnetism of the Kuparuk River Formation from oriented drill core: Evidence for rotation of the Arctic Alaska plate Priority And Related Applications Priority Applications (1)
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