scholarly journals Geochemical specialization of the Shubarkol deposit coals

2020 ◽  
pp. 5-10
Author(s):  
V. I Parafilov ◽  
A Amangeldikyzy ◽  
V. S Portnov ◽  
A. N Kopobayeva ◽  
A. D. Maussymbayeva
Keyword(s):  
Geochemical Specialization

scholarly journals Ore and Geochemical Specialization and Substance Sources of the Ural and Timan Carbonatite Complexes (Russia): Insights from Trace Element, Rb–Sr, and Sm–Nd Isotope Data

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 711
Author(s):  
Irina Nedosekova ◽  
Nikolay Vladykin ◽  
Oksana Udoratina ◽  
Boris Belyatsky
Keyword(s):  
Trace Element ◽  
Mantle Source ◽  
Crustal Evolution ◽  
Trace Element Data ◽  
The Urals ◽  
Nd Isotope ◽  
Enriched Mantle ◽  
Depleted Mantle ◽  
Mantle Sources ◽  
Geochemical Specialization

The Ilmeno–Vishnevogorsk (IVC), Buldym, and Chetlassky carbonatite complexes are localized in the folded regions of the Urals and Timan. These complexes differ in geochemical signatures and ore specialization: Nb-deposits of pyrochlore carbonatites are associated with the IVC, while Nb–REE-deposits with the Buldym complex and REE-deposits of bastnäsite carbonatites with the Chetlassky complex. A comparative study of these carbonatite complexes has been conducted in order to establish the reasons for their ore specialization and their sources. The IVC is characterized by low 87Sr/86Sri (0.70336–0.70399) and εNd (+2 to +6), suggesting a single moderately depleted mantle source for rocks and pyrochlore mineralization. The Buldym complex has a higher 87Sr/86Sri (0.70440–0.70513) with negative εNd (−0.2 to −3), which corresponds to enriched mantle source EMI-type. The REE carbonatites of the Chetlassky сomplex show low 87Sr/86Sri (0.70336–0.70369) and a high εNd (+5–+6), which is close to the DM mantle source with ~5% marine sedimentary component. Based on Sr–Nd isotope signatures, major, and trace element data, we assume that the different ore specialization of Urals and Timan carbonatites may be caused not only by crustal evolution of alkaline-carbonatite magmas, but also by the heterogeneity of their mantle sources associated with different degrees of enrichment in recycled components.

Geochemical specialization of terrigenous deposits of the Bashkirian meganticlinorium

2017 ◽  
Vol 72 (4) ◽  
pp. 269-278
Author(s):  
S. G. Kovalev ◽  
V. I. Snachev ◽  
M. A. Romanovskaya
Keyword(s):  
Geochemical Specialization

On the geochemical specialization of deep-seated high-carbonaceous systems

2010 ◽  
Vol 433 (1) ◽  
pp. 962-965 ◽  
Author(s):  
F. A. Letnikov ◽  
A. A. Zayachkovskii ◽  
A. F. Letnikova
Keyword(s):  
Geochemical Specialization

Geochemical specialization of limescale of water sources illustrated by two regions in Siberia

2010 ◽  
Vol 3 (4) ◽  
pp. 498-507 ◽  
Author(s):  
A. E. Tapkhaeva ◽  
T. T. Taisaev ◽  
L. P. Rikhvanov ◽  
E. G. Yazikov ◽  
N. V. Baranovskaya
Keyword(s):  
Water Sources ◽  
Geochemical Specialization

scholarly journals Role of the Environment in the Placement of Apocarbonate Gold Mineralization Chakylkalyan Megablock (Southern Uzbekistan)

2021 ◽  
Vol 7 (6) ◽  
Author(s):  
T. Yarboboev ◽  
Sh. Sultanov ◽  
I. Ochilov
Keyword(s):  
Carbonate Rocks ◽  
Gold Mineralization ◽  
Gold Deposits ◽  
Gold Deposition ◽  
Sufficient Detail ◽  
Available Information ◽  
Gold Bearing ◽  
Geochemical Specialization

Analysis of the available information and the results of many years of research on gold deposits in Uzbekistan made it possible to identify the main unconventional types of deposits. Among them, the most interesting are apocarbonate, crustal, sulfide-carbonaceous and apovolcanogenic quartzite (Upper-Kattakashkasai ore occurrence). The apocarbonate type is widespread in Uzbekistan, has been studied in sufficient detail and information is provided on it in this article. The article examines the existence, distribution and genesis of ores of Karlin type gold deposits. The generalizing characteristics of the Karlin type gold mineralization are given. The issues of geochemical specialization of the Paleozoic strata of the Chakylkalyan megablock are considered, the most favorable stratolevel for the localization of mineralized zones is determined, and the features of carbonate rocks in the process of gold deposition during reactions with silicic solutions are characterized. Based on the materials of regional geochemical profiling, the behavior of the main ore-forming elements in the rocks of both carbonate and volcanogenic-terrigenous strata is analyzed. As a result of the analysis, subclarkic contents of the main ore-forming elements (As, Co, Ni, Pb, Cu, Ag, V, Cr, Sc) were revealed, which create increased concentrations in gold-bearing pyrites of both apocarbonate gold mineralization and related formations.

scholarly journals Structure and age of the fluorite-berillium deposit of the field Rainbow, Western Sayan Mountains: to the problem of assessment of metallogenic prospects of the territory

2019 ◽  
Vol 488 (3) ◽  
pp. 282-287
Author(s):  
D. A. Lykhin ◽  
V. V. Yarmolyuk ◽  
A. A. Vorontsov ◽  
A. V. Travin
Keyword(s):  
Carbonate Rocks ◽  
Rare Metal ◽  
Early Paleozoic ◽  
Geochemical Parameters ◽  
Rare Metal Mineralization ◽  
Metallogenic Zone ◽  
Western Sayan ◽  
The Relationship ◽  
Good Agreement ◽  
Geochemical Specialization

The age and geochemical parameters of the muscovite-fluorite-euclase-beryl Raduga deposit, which is located within the Kizir-Kazyr zone of rare-metal magmatism, are determined. In contrast to other deposits and ore occurrences of the zone, represented by alkaline granites characterized by rare metal mineralization, the Raduga deposit is associated with metasomatites in carbonate rocks. The age of the deposit, estimated at 40Ar/39Ar by the muscovite method of beryllium fluorite-muscovite greisens, is 469.3± 4.5Ma. It corresponds to the age of the ore-bearing alkaline granites of the zone. The dikes which occur within the deposit are identical by the composition to the dikes of rare-metal alkaline granitic massifs, one of which is located in a few kilometers from the deposit. The nature of the ore Be-Li mineralization of the deposit is in good agreement with the geochemical specialization of the Early Paleozoic Kizir-Kazyr metallogenic zone. The revealed features of the relationship between Raduga deposit and rare-metal deposits in alkaline granites suggests a variety of mechanisms involved in the formation of rare-metal deposits of the Kizir-Kazyr zone. Thus, it allows to expand approaches for prediction and exploration of rare-metal deposits in the region.

scholarly journals THE CONTENT AND DISTRIBUTION OF TRACE ELEMENTS IN SOILS DURING THE DEVELOPMENT OF OIL FIELDS IN THE REPUBLIC OF KALMYKIA

2021 ◽  
pp. 14-21
Author(s):  
M. S. Yessenamanova ◽  
Ts. D. Davaeva ◽  
L. Kh. Sangadzhieva ◽  
B. V. Tsombueva ◽  
O. S. Sangadzhieva ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Oil Spills ◽  
Water Discharge ◽  
Total Content ◽  
Petroleum Products ◽  
Oil Fields ◽  
Maximum Value ◽  
Chloride Sulfate ◽  
The Republic ◽  
Geochemical Specialization

The article presents the results of chemical analysis soils of drilling sites of the Sostinsky and Mezhozerny oil fields of the Republic of Kalmykia. The content of sodium ions is more than 2 times higher in both deposits. At the same time, the content of chlorides in some areas of the Mezhozerny field reaches its maximum. As a result, the soils are highly saline in terms of the degree of salinity and are mainly chloride-sulfate-sodium in terms of the type of salinity. In oil fields, oil spills lead to the accumulation of organic carbon many times, with the total content of organic matter exceeding up to 5 times. The increase in the content of petroleum products is greatest in water discharge and wellheads. Studies on the content of heavy metals in the soils of oil fields showed that the average content of elements does not exceed the maximum permissible concentration of substances. At the same time, the content of most heavy metals exceeds the background ones, for example, lead, cadmium up to 2 times, strontium up to 8 times, mercury up to 6-12 times. In comparison with the clarke of the lithosphere (according to Vinogradov), an ecological-geochemical specialization in cadmium is noted. In the soils of the Sostinsky deposit, in the series of distribution of heavy metals, the maximum value is typical for cadmium, and in the Mezhozernoye deposit for mercury. At the Sostinskoye deposit, higher than the background is characteristic of such elements as: lead, vanadium, copper, strontium, and at the Mezhozernoye deposit, the excess of the background is achieved for such elements as: cadmium, zinc, lead, vanadium, copper, chromium, strontium.

scholarly journals APATITE-ALBITE METASOMATITES (ACEITES) OF THE EASTERN ALDAN-STANOVOY SHIELD

2021 ◽  
Vol 40 (5) ◽  
pp. 59-73
Author(s):  
V.E. Kirillov ◽  
Keyword(s):  
Rare Earth ◽  
Structural Control ◽  
Earth Element ◽  
Rare Metal ◽  
Igneous Rocks ◽  
Metamorphic Rocks ◽  
Intrusive Rocks ◽  
Characteristic Features ◽  
Metasomatic Zoning ◽  
Geochemical Specialization

The paper summarizes the findings of research on Riphean ore-bearing apatite-albite metasomatites (aceites) identified in metamorphic, volcanic and intrusive rocks in the eastern Aldan-Stanovoy shield. The characteristic features of lithological and structural control of aceites, their mineral and petrochemical composition, geochemical associations, ontogeny, metasomatic zoning, and geochemical specialization are outlined. Aceites in metamorphic rocks are assigned to the albite-chlorite-apatite facies and in igneous rocks to the albite-apatite facies. Apatite-albite metasomatites host mineralization of two types: uranium (in aceites after metamorphic rocks) and uranium – rare earth element – rare metal (in aceites after volcanic and intrusive rocks).

Geochemical specialization of the tin-bearing granitoid massifs of NW Bohemia

1991 ◽  
Vol 26 (4) ◽  
Author(s):  
K. Breiter ◽  
M. Sokolov� ◽  
A. Sokol
Keyword(s):  
Geochemical Specialization
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