scholarly journals Ufa mantle ridge fault – main tectonic, geological and minerogenic consequences

2020 ◽  
pp. 73-85
Author(s):  
Aleksandr Nikolaevich SAVICHEV ◽  
◽  
Vitaliy Nikolaevich OGORODNIKOV ◽  
Keyword(s):  
Rare Earth ◽  
Mineral Deposits ◽  
The Urals ◽  
Influence Zone ◽  
Tectonic Events ◽  
Deep Faults ◽  
Seismic Sounding ◽  
Zone Of Influence ◽  
Ferruginous Quartzites ◽  
North Latitude

Relevance of the work. The data on the structure and properties of the subsoil, obtained on the basis of geophysical studies, make it possible to significantly revise the ideas about the structure and patterns of formation of mineral deposits within the Ufimsky ridge fault and its zone of influence (55º–56º north latitude in the Urals). Purpose of the work: constructing a model of the formation of the Ufa mantle ridge fault and identifying its mineragenic features using the example of deposits of ferruginous quartzite, kyanites and rare earth mineralization. The methodology of the research. The published databases and their summarizing materials on deep seismic sounding of the Urals with the allocation of a mineragenic load characteristic of the Ufa mantle ridge fault and its influence zone were used as a factual basis for the research. Research results. The Ufa ridge fault is a structure formed by the uplift of the upper mantle, presumably at the intersection of intramantle shear faults. The transverse asymmetry of the mantle ridge fault and the later rift-collisional processes are reflected in the overlying complexes and lead to a distortion of the lines of the outcropping of deep faults at the level of the modern erosional section. Horst formation was complicated by rifting-collisional tectonic events with accompanying magmatic, metamorphic, metasomatic, and dislocation processes, accompanied by various types of numerous manifestations and mineral deposits exposed by erosional processes. Schemes of the location of deposits and manifestations of ferruginous quartzites, kyanites and rare earth mineralization in its more eroded part are given as examples confirming the confinement of various types of minerals to the structure of the Ufa mantle ridge fault. Conclusions. The cropping of deposits and occurrences of ferruginous quartzites, kyanite, rare earth mineralization and other minerals is closely related to the development of the Ufa mantle ridge fault.

Archipelagic Archives

2021 ◽  
Author(s):  
Yuriko Furuhata
Keyword(s):  
Rare Earth ◽  
Settler Colonialism ◽  
Mineral Deposits ◽  
Northern Island ◽  
The Pacific ◽  
Rare Earth Minerals ◽  
Geological Formation ◽  
Colonial Archives ◽  
The Pacific Ocean ◽  
Geological Map

Abstract This article examines the intertwined cultural politics of geology, mining, and archival media in the context of Japan’s development as an archipelagic empire. The first Japanese geological map (1876) was completed by American geologist Benjamin Smith Lyman, who surveyed mineral deposits in Hokkaidō, Japan’s northern island, long inhabited by the Indigenous Ainu people. Following decolonial and archipelagic thoughts, the author reads across earthly archives of geological strata and colonial archives of historical documents to elucidate the conceptual duality of archipelago as a geological formation and a geopolitical territory. In tracing this formative era of Japan’s resource extraction and settler colonialism, which precedes and informs the current rush to extract rare earth minerals necessary to maintain global digital infrastructures, this article aims to both de-Westernize the methodological orientation known as media geology and offer a prehistory of contemporary rare earth mining in the Pacific Ocean.

scholarly journals Metallogenic Specialization Of Sienitoid Small Intrusions And Dikes Of The Kumbel-Ugam Zone Of Depth Faults (Chatkal-Kurama Region, Middle Tian Shan)

2020 ◽  
Vol 6 (4) ◽  
pp. 547-576
Author(s):  
U.D. Mamarozikov ◽  
◽  
G.M. Suyundikova ◽  
S.V. Kirezidi ◽  
◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Mass Spectrometric Study ◽  
Mass Spectrometric ◽  
Material Composition ◽  
Geochemical Data ◽  
Spectrometric Study ◽  
Rare Metals ◽  
Deep Faults ◽  
Composition Of Minerals

The article describes the geological, petrographic, mineralogical and geochemical data confirming comagmatic nature of syenitoid small intrusions and dikes of the Kumbel-Ugam zone of deep faults. Specialty of syenitoids and related metasomatites and hydrothermalites for precious and rare metals is described on the basis of the results of microprobe analyzes of the forms of occurrence, the material composition of minerals, micro segregations of ore-bearing silicon-alkaline fluids and nanocrystallites in them. The results of mass-spectrometric study of syenitoids confirm their metallogenic specialization in noble, rare and rare earth metals.

Mineral Deposits of the Urals and Links to Geodynamic Evolution

2005 ◽  
Author(s):  
Richard J Herrington ◽  
Victor V Zaykov ◽  
Valery V Maslennikov ◽  
Dennis Brown ◽  
Victor N Puchkov
Keyword(s):  
Mineral Deposits ◽  
Geodynamic Evolution ◽  
The Urals

scholarly journals Rare Earth Elements and Other Critical Metals in Deep Seabed Mineral Deposits: Composition and Implications for Resource Potential

Minerals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 3 ◽  
Author(s):  
Sang-Joon Pak ◽  
Inah Seo ◽  
Kyeong-Yong Lee ◽  
Kiseong Hyeong
Keyword(s):  
Rare Earth ◽  
Deep Sea ◽  
Mineral Resources ◽  
Rare Earth Oxide ◽  
Economic Feasibility ◽  
Mineral Deposits ◽  
Low Grade ◽  
Ion Adsorption ◽  
Critical Metals ◽  
Deep Sea Sediment

The critical metal contents of four types of seabed mineral resources, including a deep-sea sediment deposit, are evaluated as potential rare earth element (REE) resources. The deep-sea resources have relatively low total rare earth oxide (TREO) contents, a narrow range of TREO grades (0.049–0.185%), and show characteristics that are consistent with those of land-based ion adsorption REE deposits. The relative REO distributions of the deep-seabed resources are also consistent with those of ion adsorption REE deposits on land. REEs that are not part of a crystal lattice of host minerals within deep-sea mineral deposits are favorable for mining, as there is no requirement for crushing and/or pulverizing during ore processing. Furthermore, low concentrations of Th and U reduce the risk of adverse environmental impacts. Despite the low TREO grades of the deep-seabed mineral deposits, a significant TREO yield from polymetallic nodules and REE-bearing deep-sea sediments from the Korean tenements has been estimated (1 Mt and 8 Mt, respectively). Compared with land-based REE deposits, deep-sea mineral deposits can be considered as low-grade mineral deposits with a large tonnage. The REEs and critical metals from deep-sea mineral deposits are important by-products and co-products of the main commodities (e.g., Co and Ni), and may increase the economic feasibility of their extraction.

An overview of mineral deposits in the Urals: A special issue of Ore Geology Reviews

2017 ◽  
Vol 85 ◽  
pp. 1-3 ◽  
Author(s):  
Richard J. Herrington ◽  
Olga Yu. Plotinskaya ◽  
Valery V. Maslennikov ◽  
Svetlana G. Tessalina
Keyword(s):  
Mineral Deposits ◽  
Special Issue ◽  
The Urals

scholarly journals Features of earthquake epicenters and mineral deposits spatial relationship in the Urals

2021 ◽  
pp. 31-36
Author(s):  
Aleksandr Guliaev ◽  
Keyword(s):  
Spatial Relationship ◽  
Ore Deposits ◽  
Tectonic Activity ◽  
Mineral Deposits ◽  
The Urals ◽  
Ural Mountain ◽  
Tectonic Structures ◽  
The West ◽  
East European ◽  
Modern Era

Introduction. Recent Ural mountain belt is an N-S Paleozoic orogen rejuvenated in the NeogeneQuaternary period. It separates the East European plate located to the west of it and the West Siberian plate located to the east of it. The Uralian orogeny presumably occurred at the Paleozoic time as a result 36 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 4. 2021 ISSN 0536-1028 of these plates interaction, which affected the geologic structure of the region. In the modern era, low tectonic activity in the bowels of the Urals continues supported by rare tangible earthquakes with a magnitude from 2.0–3.0 to 5.0–5.5, 3.0 – 3.5 on the average, and the intensity in the epicenter from 3.0–4.0 to 5.0–6.0 on MSK-64 scale. Research aim is to analyze the spatial relationship of sensible earthquakes epicenters and mineral deposits in the Urals. Research methodology included estimating the position of Ural earthquakes epicenters and mineral deposits relative to the geologic and tectonic structures of Paleozoic time, recent epoch, and the modern era. Research results. Most earthquake epicenters in the Urals are concentrated within the western part of the Uralian Orogeny to the west of the Main Uralian Fault (MUF), while most mineral deposits, especially ore deposits, are concentrated within the eastern part of the Uralian orogeny to the east of MUF. In the axial zone of MUF, earthquake epicenters are close and sometimes coincide. Consequently, the processes of ore deposits and earthquake foci formation are of a similar nature

scholarly journals Brockite in wallrock metasomatites of the Safyanovskoe copper-sulphide deposit (Middle Urals)

2020 ◽  
Vol 59 (3) ◽  
pp. 35-40
Author(s):  
Elena Industrovna SOROKA ◽  
◽  
Lyubov’ Vladimirovna LEONOVA ◽  
Mikhail Egorovich PRITCHIN ◽  
◽  
...  
Keyword(s):  
Rare Earth ◽  
South Urals ◽  
Middle Urals ◽  
Copper Sulphide ◽  
The Urals ◽  
Sulphide Deposit ◽  
Environment Change ◽  
Rare Earth Minerals ◽  
Composition Of Minerals ◽  
Academy Of Sciences

The relevance of the work is due to the need to study ore copper-sulphide deposits in the Urals. Purpose of the work: description of accessory brockite in metasomatites of the Safyanovskoe copper-sulphide deposit. Research methodology: the chemical composition of minerals was determined using the Jeol JSM-6390LV scanning electron microscope with an INCA Energy 450 X-Max 80 energy dispersive attachment from Oxford Instruments (Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg). Results and conclusions. For the first time for the Safyanovskoe copper-sulphide deposit (Middle Urals), an aqueous rare earth phosphate of calcium and thorium, brockite, has been determined; it belongs to the group of rhabdophane (Ca,Th,REE)[PO]4 ∙ _H2 O. The mineral is rare for the Urals and was described earlier in granite pegmatites of the Middle and South Urals, as well as in dikes of metaplagiogranites of the Bazhenov ophiolite complex. Brockite was found in the rocky metasomatites of the Safyanovskoe copper-sulphide deposit after crystalline lithoclastic tuff (tuffaceous sandstone) of acid composition. The main mass of the rock consists of quartz, kaolinite (sericite), carbonates (dolomite, Fe-magnesite) with rare inclusions of pyrite. Brockite is found in the dolomite-quartz matrix of the sample in intergrowths with REE-goyazite – strontium aluminophosphate. It is assumed for the Safyanovskoe copper-sulphide deposit that an alumina association with an ore mineral association and rare earth minerals, in particular, REE-alumophosphates and phosphates, will form closely at the same time as the temperature drops and the redox conditions of the mineral formation environment change.

scholarly journals Monitoring the deformation of the earth’s surface in the zone of influence construction

2020 ◽  
Vol 157 ◽  
pp. 02013
Author(s):  
Aleksandr Kazantsev ◽  
Aleksei Boikov ◽  
Vyacheslav Valkov
Keyword(s):  
Soil Mass ◽  
Deformation Monitoring ◽  
Existing Buildings ◽  
Influence Zone ◽  
Monitoring Technique ◽  
Observation Methods ◽  
Zone Of Influence ◽  
New Construction ◽  
Simulation Results ◽  
Under Construction

The issues of ensuring the safe construction and operation of buildings and structures in a metropolis are considered. A description of the monitoring technique is given, which is to control the deformation process during new construction near existing buildings. The necessity of performing geodetic observations of deformations of the earth’s surface is emphasized. A precalculation of the accuracy of determining the position of deformation grades located in the influence zone of an object under construction is given. Based on the simulation results, control zones are identified in which it is proposed to monitor the process of deformation of the soil mass at the boundary of the pit. The advantages of the integrated deformation monitoring technique over traditional observation methods are presented.

Formation features of phytoplankton of the Bolshaya river (Omsk region) in the zoo's influence zone

2021 ◽  
pp. 131-134
Author(s):  
Olga P. Bazhenova ◽  
Svetlana V. Gontarenko
Keyword(s):  
Seasonal Dynamics ◽  
Trophic Status ◽  
Taxonomic Composition ◽  
Influence Zone ◽  
Dynamics Of Abundance ◽  
Quality Class ◽  
Zone Of Influence ◽  
High Level

According to the results of processing phytoplankton samples taken in 2018–2019 on the Bolshaya River (Omsk Region), the taxonomic composition of phytoplankton, its number and biomass were established in the zone of influence of the Bolsherechensky Zoo. As part of the phytoplankton, 183 species and intraspecific taxa from 8 divisions were identified. Seasonal dynamics of abundance of river phytoplankton and its changes in zone of zoo influence were investigated. In summer, a high level of phytoplankton development and «flowering» of water caused by Aphanizomenon flos-aquae are observed in the river on the territory of the zoo. In the formation of the number and biomass of phytoplankton, a significant share belongs to Chrysophyta and Euglenophyta. The trophic status of the Bolshaya River corresponds to the category of eutrophic waters. In autumn and summer, water in the river corresponds to the 3rd quality class of «satisfactory purity».

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