scholarly journals Stream Sediments of the Pestrinsk Silver-Bearing System (Northeastern Russia)

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 65
Author(s):  
Artem S. Makshakov ◽  
Raisa G. Kravtsova
Keyword(s):  
Fine Fraction ◽  
Component Composition ◽  
Stream Sediments ◽  
Northeastern Russia ◽  
Alluvial Sediments ◽  
Multi Scale ◽  
Main Indicator ◽  
Composition Structure ◽  
Indicator Elements ◽  
Bearing System

The composition, structure, and formation features of the exogenous anomalous geochemical fields (AGCFs) identified through stream sediments (SSs) are considered here within the Pestrinsk silver-bearing system and the Goltsovy silver-polymetallic deposit. The research was performed in the southern part of the Balygychan-Sugoy trough (northeastern Russia). The exogenous AGCFs of the main indicator elements of ores, formed in cryolithogenesis zone conditions, were studied. We used the results of multi-scale areal geochemical surveys of SSs. A survey of SSs at 1:200,000 scale was found to be effective at the stage of regional forecasting. Indeed, it is characterized by simplicity and the possibility of obtaining information operatively regarding the metallogeny of the area. It was found that at the local forecast stage, when prospecting for mineralization, the most effective was a survey of SSs at 1:50,000 scale. The AGCFs identified during this survey were distinguished by a richer component composition, higher contrast, and closer relationship with ores. During the lithochemical sampling of the watercourse heads, where alluvial sediments were found to be almost completely absent, a positive result was obtained by the bryolithochemical method, which is based on moss sampling together with a fine fraction of alluvium held by a moss cushion. The method enabled the sampling of watercourse heads and thus yielded information about the presence or absence of anomalous concentration fields of ore elements.

Comparison between the geochemical response of BLEG and fine fraction stream sediments to mineralization in the Eastern Black Sea region, Turkey

2020 ◽  
Vol 217 ◽  
pp. 106609
Author(s):  
Huseyin Yilmaz ◽  
Reza Ghezelbash ◽  
David R. Cohen ◽  
Ramazan Sari ◽  
Fatma Nuran Sönmez ◽  
...  
Keyword(s):  
Black Sea ◽  
Fine Fraction ◽  
Stream Sediments ◽  
Black Sea Region

scholarly journals Investigation of the damp-heating processing of multilayer fabric

2020 ◽  
Vol 71 (06) ◽  
pp. 568-571
Author(s):  
SNEZHINA ANDONOVA ◽  
IVAN AMUDZHEV
Keyword(s):  
Technology Development ◽  
Complex Structure ◽  
Component Composition ◽  
Limit Values ◽  
Textile Materials ◽  
Technological Processes ◽  
Operating Modes ◽  
Controllable Factors ◽  
Composition Structure

With the global industrial technology development, technological processes in the textile and clothing industry areconstantly evolving. These rapid rates of development necessitate the need for continuous research and analysis toestablish optimal operating modes for various technological processes. The damp-heating processing/DHP is one of themain technological processes in the sewing industry. The quality of the sewing article depends to a large extent on thequality of the performance of operations in the damp-heating processing. The wide variety of textile materials, each withdifferent composition, structure and properties, is a prerequisite for conducting extensive research to refine manageablefactors of the DHP process. In recent years, textile materials with an increasingly complex structure and multi-component composition have become increasingly important. Of particular interest are the so-called double wovenfabrics. Therefore, the subject of this study is the damp-heating processing of an innovative textile fabric tissue –amultilayer weave type “double cloth”. One of the main controllable factors of the damp-heating processing is the amountof moisture introduced into the processed textile materials. The aim of this paper is to determine the limit values for theamount of steam used in the damp-heating processing of a tissue –a multilayer weave type “double cloth”.

scholarly journals Investigating high zircon concentrations in the fine fraction of stream sediments draining the Pan-African Dahomeyan Terrane in Nigeria

2012 ◽  
Vol 27 (8) ◽  
pp. 1525-1539 ◽  
Author(s):  
Roger M. Key ◽  
Christopher C. Johnson ◽  
Matthew S.A. Horstwood ◽  
Dan J. Lapworth ◽  
Katherine V. Knights ◽  
...  
Keyword(s):  
Fine Fraction ◽  
Stream Sediments ◽  
Pan African

scholarly journals Influência da Mineração no Incremento e na Disponibilidade Geoquímica de Cobre em Sedimentos Fluviais - O Caso das Minas do Camaquã, RS, Brasil.

1996 ◽  
Vol 23 (1-2) ◽  
pp. 51
Author(s):  
LUCIANO LAYBAUER
Keyword(s):  
Copper Content ◽  
Fine Fraction ◽  
Contamination Factor ◽  
Stream Sediments ◽  
Mining Operations ◽  
Copper Contamination ◽  
Pollution Levels ◽  
The Mean ◽  
Contamination Levels ◽  
Background Area

This work presents an analysis of copper contamination levels and copper availability in stream sediments of the João Dias Creek in the Minas do Camaquã region, caused by mineral exploitation. Fluvial sediments are predominantly sandy with less than 1% fine fraction (< 63µm), which leads to negligible amounts of environment available metals. The mean copper content in the CH3COONH4 (1M) exchangeable fraction of stream sediments showed an average availability around 7% in the region affected by mining operations. In background area this ratio is less than 2% and up to 13% in the sample point situaded downstream the sludge dam. The mean copper content in the HNO3 (0,1N) extractable fraction of stream sediments showed an average availability around 55% in the region affected by mining operations. In background area this availability is around 10% and reached 90% in the sludge dam. The pollution levels stablished by USEPA for sediments, the contamination factor (CF) and the geoaccumulation index (Igeo) determined in the fine fraction indicated a high copper contamination in the drainage segments affected by mining effluents.

scholarly journals Investigation of the damp-heating processing of multilayer fabric

2020 ◽  
Vol 71 (06) ◽  
pp. 568-571
Author(s):  
SNEZHINA ANDONOVA ◽  
IVAN AMUDZHEV
Keyword(s):  
Technology Development ◽  
Complex Structure ◽  
Component Composition ◽  
Limit Values ◽  
Textile Materials ◽  
Technological Processes ◽  
Operating Modes ◽  
Controllable Factors ◽  
Composition Structure

With the global industrial technology development, technological processes in the textile and clothing industry areconstantly evolving. These rapid rates of development necessitate the need for continuous research and analysis toestablish optimal operating modes for various technological processes. The damp-heating processing/DHP is one of themain technological processes in the sewing industry. The quality of the sewing article depends to a large extent on thequality of the performance of operations in the damp-heating processing. The wide variety of textile materials, each withdifferent composition, structure and properties, is a prerequisite for conducting extensive research to refine manageablefactors of the DHP process. In recent years, textile materials with an increasingly complex structure and multi-component composition have become increasingly important. Of particular interest are the so-called double wovenfabrics. Therefore, the subject of this study is the damp-heating processing of an innovative textile fabric tissue –amultilayer weave type “double cloth”. One of the main controllable factors of the damp-heating processing is the amountof moisture introduced into the processed textile materials. The aim of this paper is to determine the limit values for theamount of steam used in the damp-heating processing of a tissue –a multilayer weave type “double cloth”.

scholarly journals Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

Minerals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 789
Author(s):  
Artem S. Makshakov ◽  
Raisa G. Kravtsova ◽  
Vasiliy V. Tatarinov
Keyword(s):  
Component Composition ◽  
Basic Element ◽  
Stream Sediments ◽  
Relative Depth ◽  
Low Contrast ◽  
North East ◽  
The North ◽  
Binding Forms ◽  
Gold Silver ◽  
Silver Mineralization

The composition, structure and formation features of the exogenous anomalous geochemical fields (AGFs) identified by lithochemical stream sediments (LSSs) are considered using the examples of the Dukat gold–silver ore-forming system and the deposit with the same name. The research was carried out in the Balygychan–Sugoy trough (Magadan region, north–east of Russia). Areal geochemical surveys on the 1:200,000 and 1:50,000 scales were conducted. Exogenous AGFs of basic element indicators of all known mineralization types were studied. It is shown that the surveys on the 1:200,000 scale are characterized by simplicity, relative depth and the possibility to obtain information operatively about the metallogeny of the area as a whole. At the same time, the anomalies were revealed as a result of surveys often making a relatively poor component composition and low contrast compared with ores. The violation of quantitative and sometimes qualitative relationships can be seen between elements, especially those related to gold–silver mineralization. In this situation, the most informative are surveys of LSSs on the 1:50,000 scale. The AGFs were revealed as a result of their performance to have a richer component composition and high contrast, conforming to different ore types. It is shown that, while prospecting for gold–silver mineralization with LSSs in cryolithogenesis zone conditions, the binding forms study of mineralization element indicators is effective. In watercourse heads, where alluvium is practically absent, mosses are proposed for sampling, as they hold the sandy silt material firmly. The obtained results are recommended for use at all stages of prospecting, not only in the north–east of Russia but also in other similar climatic regions.

scholarly journals Distribution of Pb, Zn and Cd in stream and alluvial sediments in the area with past Zn smelting operations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Gorazd Žibret ◽  
Barbara Čeplak
Keyword(s):  
Stream Sediments ◽  
Acid Digestion ◽  
Alluvial Sediments ◽  
Alluvial Sediment ◽  
Waste Dumps ◽  
Icp Ms ◽  
Sava River ◽  
Ore Roasting ◽  
Historically Contaminated Soil ◽  
The Sava River

AbstractThe sources of Zn, Pb and Cd in alluvial and stream sediments have been studied in the area of historical Zn smelting tradition. 30 samples of stream sediments and samples from 4 alluvial sediment profiles were collected. Fractions 0.125–0.063 and < 0.063 mm were analysed by the means of ICP-MS prior 4-acid digestion. The highest levels of Zn, Cd and Pb were detected in the alluvial sediments in the closest vicinity to the abandoned slag and ore roasting residue waste dumps, reaching 96 and 4520 mg/kg, 522 and 26,800 mg/kg and 3.7 and 31 mg/kg for Pb, Zn and Cd in stream and alluvial sediments, respectively. The Voglajna River then transports contamination particles into the Savinja River, which afterwards flows into the Sava River. Consequently, the anomaly can even be detected in the Sava River, more than 30 km downstream. Higher levels of Pb, Zn and Cd have been found in fraction < 0.063 mm compared to 0.125–0.063 mm fraction. Impacts of historically contaminated soil erosion and in particular the wash-out of Zn-smelting waste from the improperly managed waste dump were recognised as the dominant sources of Zn, Cd and Pb in the stream and alluvial sediments.

Euhedral crystals of ferroan platinum, cooperite and mertieite-II from alluvial sediments of the Darya river, Aldan Shield, Russia

2004 ◽  
Vol 68 (6) ◽  
pp. 871-885 ◽  
Author(s):  
G. G. Shcheka ◽  
A. N. Solianik ◽  
B. Lehmann ◽  
A. Bieniok ◽  
G. Amthauer ◽  
...  
Keyword(s):  
Solid Solution ◽  
Detection Limit ◽  
Aldan Shield ◽  
Stream Sediments ◽  
Coarse Grained ◽  
Alluvial Sediments ◽  
X Ray ◽  
Cubic Lattice ◽  
Crystallographic Planes ◽  
Analytical Detection

AbstractIdiomorphic crystals (up to 3.5 mm) of ferroan platinum, cooperite and mertieite-II were found in a heavy-mineral concentrate from stream sediments of the Darya river in the Aldan Shield, Russia. Pt-Fe crystals display cubic and thin platy habits; occasionally they are twinned. The chemical composition ranges from Pt2.64Fe1.00 to Pt2.88Fe1.00 with Os, Ru, Ir, Rh and Pd below the analytical detection limit of the electron microprobe. X-ray diffractometry of Pt-Fe crystals suggests a F-centred cubic lattice, characteristic of ferroan platinum. Some of the ferroan platinum crystals have large (about 100 μm wide) cooperite overgrowth rims or are covered by a Au-Ag alloy. Cooperite also occurs as large euhedral crystals (up to 3 mm across, partly twinned). Crystals of mertieite-II are speckled with μm-sized (2–5 μm) inclusions of sperrylite and intergrown with minerals of cooperite-braggite solid solution, Pt-Pd-Hg alloy, keithconnite and Au-Ag alloy. Fractures along crystallographic planes of the mertieite-II crystals are filled with Pd-Pt-Fe-Sb-As-Hg-Te-Bi-bearing oxides. The coarse-grained PGM from the Darya have a geological setting similar to the Kondyor PGE placer 75 km to the northeast and are probably related to clinopyroxenite-hornblende-magnetite units of Alaskan-/Uralian-type intrusions.

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