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The present study aims to develop methodological approaches for the investigation of fine-dispersed gold in ores from primary (bedrock) deposits and placers, with the objective of improving recovery efficiency. The type of gold under investigation exhibits a number of distinctive characteristics that substantially differentiate the conditions of its concentration, distribution within ore horizons and bodies, and the reliability of its analytical determination using conventional methods from those applicable to sma...

Rare metals such as Sn, W, Ta, Nb, Li and rare earth elements are essential for modern technologies, renewable energy systems and advanced materials. Their growing demand increases the importance of studying rare-metal provinces and identifying new perspective areas. The Kalba–Narym belt in Eastern Kazakhstan is one of the main rare-metal regions of Central Asia. However, the potential of its south-eastern part remains insufficiently evaluated. This paper considers the Cherdoyak deposit as an example of greisenâ...

The territory surrounding the Tekeli polymetallic tailing storage facility (SE Kazakhstan) represents a highly transformed technogenic landscape where natural ecosystems have been replaced by heterogeneous ecotopes with distinct abiotic constraints. This study aims to classify technogenic ecotopes and characterize their abiotic parameters to provide a scientific basis for ecological restoration. Four major ecotopes were identified based on geomorphology, substrate origin, granulometric structure, moisture regime, ...

The Alasehir Graben hosts a thick sedimentary sequence of terrestrial clastics deposited from the Early Miocene to the present. Oil shales occur with thin- to medium-bedded sandstones, siltstones, and shales in the upper part of Alasehir Formation. This study evaluates depositional settings and paleoenvironmental conditions via inorganic geochemistry of oil shales. X-Ray Diffractometer results show the presence of quartz, clay, mica, feldspar, calcite, chlorite, pyrite, and ilmenite. Al2O3 shows strong positive co...

The spatial and temporal relationship between petroleum and ore deposits has attracted the attention of scientists since the 1960s, when a connection was determined between oil-gas formation processes and ore-forming processes, which led to the formation of Pb-Zn Mississippi-type deposits, Carlin-type gold deposits, and stratiform copper deposits. These studies concluded that there is a paragenetic relationship between petroleum fluids and ore mineralization. To date, studies concerning the relationship between se...

The aim of this study is to conduct an in-depth analysis of data on the genesis of pegmatite deposits of the Kalba-Narym rare metal belt, features of rare metal mineralization. The research methodology includes the analysis of existing information on the study of geology and structural-tectonic conditions of the formation of rare metal deposits within the central part of the Kalba-Narym batholith. Field studies, sampling (more than 40 samples), and study of the mineralogical composition of pegmatites and host rock...

Miocene deposits are widespread in the Carpathian Foredeep in Poland (the northernmost part of Central Paratethys). The Poreba Zegoty XXV/25 borehole is located about 25 km on the west from Krak-w in the western part of the Carpathian Foredeep. The profile of Miocene deposits in this borehole includes the Klodnica and Skawina Formations. The Skawina Formation sediments are represented by grey and ash-gray claystones slightly brecciated in places. Micropalaeontological studies were conducted on the Skawina Formatio...

Hydrothermal processes, particularly hydrothermal eruptions, play a key role in forming epithermal gold-silver deposits. Such deposits, first described by White [1] and Lloyd [2], are found in both active and ancient hydrothermal systems [3]. These processes are linked to geothermal systems, volcanic activity, and fluid circulation, but their exact mechanisms and influence on metal concentration remain debated. This study examines the role of hydrothermal eruptions and key factors (temperature, boiling, chemical c...

The Globigerina–bearing Tuffs and Marls are deposits included in the Slanic Molasse. Several formations can be separated within these deposits some of the units maintaining remarkable lithofacial consistency, so that they can be recognized in the entire out – cropping area of the Carpathian Molasse. Th e Globigerina–bearing Tuffs and Marls has been described and separated by V. Marutiu under the name of the “Slanic Tuff”[1] . The most spectacular exposures of this formation occur at Piatra Verde near Sla...

Post collisional volcanic rocks cover large areas in the east of the Biga peninsula, which is located in the NW Anatolian magmatic belt along the southern margin of Marmara Sea. These volcanic units span a compositional range from calc-akaline (i.e. andesite, dacite, and rhyodacite to rhyo lite), to alkaline (olivine basa lts) lavas. All rock units display coherent variation trends on the major and trace element Harker diagrams. Cenozoic volcanic sequences exposed in the east of Biga are divided into three volcano...

The Dardanian zone (Serbian-Macedonian massif) represents the western part of the Rhodope crystalline basement. This zone was structured and metamorphosed during the Hercynian and post Hercynian tectonic st ages. The geological mapping at 1:25.000 [1] show that a of the studied region is built of crystalline Pale ozoic basement. The important aspects have been identified in the structure and metamorphism from this part of western Rhodopes. The study of the deformed Variscian and Hercynian tectonic phases are diffi...

Diagenesis and geochemistry of three selected and well exposed outcrops of Qamchuqa Formation (Early Cretaceous) at Kurdistan Region northeastern Iraq were examined. Lithologically this formation is mainly composed of dolomite, and limestone beds. Petrographic study of the Qamchuqa Formation reveals that the skeletal and some non- skeletal grains within the limestone a nd dolomitic limestone beds are the main components of this formation. Micritizati on, cementation, neom orphism, compaction, dissolution and dolom...

The Upper Cretaceous Flysch series between Suhareka and Bajice is developed in the psamitic and brecciaed facies . The relation between them is tectonic, but south of the area a gradual transitio n from one to the other facies has been established. Psamitic Flysch facies is characterized by a constant composition and regular graded bedding on the whole area of its distribution. It is represented by three lithogenous types: limy, sandy and conglomeratic. The limy lithogenous types : is characterized by a fairly goo...

At Eastern Taurid , the age of Carbonate rocks, outcroping at soutgh of Yahyali (Kayseri) had been defined as Jurassic-Cret aceous age in previous studies. The unit wich had been named as Köroğlutepesi Limestones in previous studies, outcroping also Eastern Tufanbeyli (Adana) at Gümelek Hill, arround Kayap ınar and İğdebel villages. Foraminiferal biostratigraphy of The sedimantery rocks surfacing at these locationes, hase been defined. Have been get three measured stratigraph ic section in Tufanbeyli region....

This paper presents correlations of a porti on of bordering zone Kosova – Albania, in other words sheet K-34-78-A - Shishtavec. Sheet of the three neighbouring countries boarders Kosova –Macedonia – Albania and covers the are of roughly 387 km 2. Out of this area, 148 km2 or 38 % lay in Albania territory, more precisely in the surrounding of Kukës and Dibra towns. Othe r part, however, roughly 239 km 2 or 62 % lay in Kosova territory, Dragash Municipality (Sharr Mountain area). Geological map of each of the...

This work presents the geological structure of the Chipupushi area which is located on the border between the Northwestern Province and Copperbelt Province in the Republic of Zambia. Geological structure of the Luswishi dom e, within which the Chipupushi area is, consists of: Igneous rocks, the complex of ultra basic, basic, intermediate and acid magmatic rocks, the Basement Complex, which was built of schist, gneiss, granite - gneiss and subordinated pegmatite as well as the Katanga super group out of which the C...

During mining activities, as a result of removal of inert materials for unfolding layers of lignite, has resulted into covering and degradation of large areas of land. This inert material is now distributed in some areas, in the form of landfill, often referred to as wastelands or dump tuck, and occupied this area: Folding Lismir – Kuzmin 780 ha, folding Shipitullë – 136 ha, folding deep Lugu 437 ha, folding Vasilevo 157 ha, folding Palaj 49 ha. From the above data results that the degraded land from wastelan...

Forecast of international experts shows that by the end of the first quarter of this century there will be about 20-30% less copper produced from natural resources in relation to consumption (needs) in the world. Therefore, it is planned to compensate for the lack of processing of raw materials with recycling of technogene waste, which contains copper. In this respect the planned implementation of this process (technological process) has a special significance, especially as the processi ng of these raw materials,...

Significant economic mineralizations of Kosova territory are hydrothermal deposits of Pb-Zn. These deposits are located mainly in northern and eastern part of Kosovo, the so- called Trepca ore belt, which has a longitudinal stretch about 80 km and consists of a number of mineralized deposits and occurrences. In the geological context, this ore belt is part of the Vardar zone and associated with volcanic and sub volcanic rocks. Most of these deposits are located in the sequences carbonate and other rocks of differe...

The main topic of the article is mineralogical research in the North Bohemian Brown Coal Basin. This work summarises new knowledge for the 2002 – 2009 period, five new minerals were identified in the basin in the interval: anorthite, esseneite, ferrierite, melilite, and srebrodolskite. The second object of the article is the situation of important localities of the Krušné Hory Mountains. Main attention is devoted to a newly discovered amethyst locality Černý Potok.

The studied area is situated about 70 Km in west of Damghan, and from the structural point of view, the area is part of south of central Alborz zone. Granitoid bodies intruded into late Eocene volcanic and volcanoclastic, mainly composed of monzonite and granite composition. Mineralogically, these rocks contain qua rtz, plagioclase, alkali- feldspare, amphibole, clinopyr oxene, biotite, zircon, apatite, and opaque minerals. Textures of rocks are microgranular and fi eld and textural evidences show that the plutone...

The Maastrichtian aged Dikmendede Formation in the Orhaniye (Kazan-Ankara) area formed in a deep-marine environment. The formation consists of alternating green, grey-coloured turbiditic conglomerate, sands tone, shale, claystone and marl. The unit has typical flysch features and has sediment ary structures such as thin/thick bedding, normal graded bedding, erosional surfaces, flut e casts, load structures, ball-and-pillow structures, bounce marks, slump structur es and numerous biogenic traces. The conglomerates ...

Sedimentary analysis was based on formati ons of inferior Molasse which belong to Burdigalian and Badenian, being performed in representative natu ral claddings from Prahova, Romanian area. Complete successions of Variegated Formation and Globigerina – bearing Tuffs and Marls Formation may be followed in V. Mare – Alunis and Slanic–Piatra Verde Quarry (Prahova). The Variegated Formation is mostly ruditic– arenitic at its base, grading into a silty–lutitic sequence at the top. It mainly consists of conglo...

The most recent glacial period span in the interval 110,000 to 10,000 years ago. Recent geomorphologic studies in the Eastern Thracian plane have shown significant change in the sedimentation rates since the Younger Driass (between 10,800 and 9500 BC), which may provide a new inside on the climatic evol ution of the region. It was found that all local rivers are in an aggradation phase, depositing up to 3 m thick mudstone deposits on top of a colder climate’s well-washed, coarse sandstones. The aggradation resul...

Dinarido-Albanido-Hellenic folded alpine belt is interpreted as a result of Mesozoic - Cenozoic convergence and continental collision of a series of micro-blocks localized between the Eurasian and African plates. The ophiolites of the Balkan Peninsula are particularly formed in the ocean basins wh ich were divided by micro-continents during the Mesozoic period and they are products of the Mesozoic - Cenozoic obduction. The Vardar Ophiolites from the region of Gjilan are covered by a chaotic sequence, well stratifi...

Every cyclic geological phenomenon may sugge st a structural image of the geological time. The dynamic cycles with very long periods can characterize the whole geological time, but especially the Precambrian. The cy cles with periods between 4 and 26 Ma are useful for the temporal individualization of th e Phanerozoic and the cycles with a short periods are very representative for Cenozoic. But the Earth’s geological history also provides a good perspective over the cosmic time through a super-mega-cycle (~2.56 ...

The aim of this paper is to show the possi bilities, how effective use GIS for modelling of mineral deposits, for example of brown coal deposit NovГЎky. The work results - seam base model and seam thickness model, ash content and heat value of coal presented in the ArcGIS are an example of a modern appr oach to the processing of geological data. The form of presentation offered by GIS allows much more efficient deposit data processing and provides greater op portunities for planning and optimization mining activit...

Brief Development of tunnel would be partially through flotation tailing dump and partially through rock massif. Krivelj`s river stream would be regulated by new tunnel, because the old manifold could be destructed. Project No. 17004 (2008-2010) Ministry of Science and Technology Development explored all aspects of the environment in which the new tunnel is designed (primarily engineering-geological, hydrogeological and petrology features).

For all territory of Kosova during 1966 – 1982 were compiled geological map sheets at scale 1:100 000 and description texts. During 2005 – 2006 ICMM had projects on compiling Geological map at scale 1:200 000 and digitalization of geological map sheets at scale 1:100 000. Projects were realized by Beak Consultants GmbH and in close corporation with geology staff of ICMM. During map digitalization were observed some discrepancies between some map sheets. In order to verify exacts description, during 2005 were o...

In 2009 engineering geological zoning of the riparian area of the town of Ruse, including the Danubian bank, the low floodplain terrace, the loess slope and the terraces T3,4, was carried out by the Geotechnical Research Station. The ports, the park, the Sextaginta Prista Roman fortress, the central urban part with impressive architectural ensembles and part of the West Industrial Zone are found in this area. The investigations were conducted within the frame of a contract with the Ruse municipality. Since the ori...

Investigations of explosive consolidation technology of nano sized Al, ultra-disperse Ni and Ti powder compositions are discussed. The mixtures of ultra-disperse Ti (Ni) - nano sized (<50nm) Al powder compositions were consolidated to full or near-full density by explosive-compaction technology. The emulsion and ammonium nitride based industrial explosives were used for generation of shock waves. To form ultra-fine grained NiAl and TiAl intermetallides with different compositions, ultra-disperse Ni and Ti particle...

The general properties and distribution of low rank coal occurrences were investigated in Biga Peninsula, Turkey. Coal occurrences were alternated along with Tertiary clastic, volcanoclastic and continental units in the peninsula, one of the basic metallic and industrial mineral potential regions in Turkey. The collected twenty-six lignite samples from different beds were analyzed and evaluated. Proximate analyses contain to measure of moisture, ash, volatile matter, and fixed carbon parameters. The parameters of ...

Continental intraplate magmatism commonly leads to formation of subvolcanic complexes, for which it is important to characterize their mantle sources. It is necessary to distinguish between the effects on the mantle signature of fractional crystallization and the assimilation processes during magma ascent and its residence in the crust before the final emplacement. Elucidation of these processes requires besides information on Sr and Nd isotopic ratios also detailed geochemical data, especially information on conc...

Ulukisla (Nigde/Turkey) evaporites that compose the study area are situated in Ulukisla Basin at the east of Nigde, South of Central Anatolia. The aim of the study is to investigate the geological, mineralogical and geochemical properties of the gypsum and anhydrites in Ulukisla Evaporites and to determine usage area of the evaporites as an industrial material. For this scope, 50 anhydrite and gypsum samples were collected systematically from the Ulukisla evaporites in 900 m thick area. By XRD (X - Ray Diffraction...

Reconstruction of climate change in Central Asia over the last millennium with an annual resolution was made using geochemical and biological proxy in lake bottom sediments and tree-ring data. We investigated the lake in Central Asia- Teletskoe (Altai), Kucherla (Altai), Baikal, Arahlei (Chita) - and adjacent areas. Cores of bottom sediments were investigated by method of scanning X-ray fluorescent analysis with synchrotron radiation with the spatial resolution of 0.1 mm. It corresponds to the time resolution 0.2-...

The greatest reserves of hydrocarbons on the territory of the Siberian platform confine to the Vendian terrigenous collectors. The paper is dedicated to the analysis of the lithological factors, influenced the formation of these reservoirs. The void space of the sandstones was examined on the basis of the detailed petrographic and electron microscopic studies. The analysis of dependencies of the filtration-capacity properties and the structural and material characteristics carried out. Established that the sedimen...

The native gold containing high silver, extracted from gold bulk of few kilograms, was comprehensively researched. The studied through the optical microscope gold samples seem homogeneous and their fineness varies from 200 to 500 ppm. The fineness deviates from the mean value about В±20-30 ppm, however zonation is not observed. When the gold samples were dissolved in nitric acid, only silver was released into solution and gold remained in the insoluble remainder as the spongy-porous skeleton, consisting of pure go...

Middle and Upper Jurassic deposits from the area of Piatra Craiului are part of the Piatra Craiului Formation [5] and are made up of deep facies appearing at the surface, especially on the western side of the massif. On the eastern side, these facies appear sporadically, thinned due to tectonic effects. Also, they may be accompanied aby lowdepth carbonatic facies corresponding to the shelf. Lithologically, it is possible to highlight microconglomerates, quartzitic gritstones, silts, reef limestone, brown-reddish l...

The mineralogical and technological study of gold ores and dressing products demonstrate the persistence of both the ores and products of their dressing, especially Floatation concentrates. The gold loss in the tails of Floatation beneficiation are primarily associated with the smallest size fractions less than 20 microns, which make up to 70\% of the total lost gold in the Floatation tails. It is obvious that increasing the extraction of gold by Floatation is directly linked to the development of the technologica...

Organic matter of lignites from five Tertiary deposits in the Czech Republic was studied and the general goal was to characterize a series of different coal lithotypes in relation to depositional environment from the viewpoint of organic petrology and geochemistry. Coal samples were chosen to cover various lithotypes: xylite rich coals, matrix coals, liptobioliths, and sapropelic coals. The samples differ in ash, sulphur, carbon, hydrogen, oxygen and volatile matter contents, and calorific values. Xylite rich and ...

Gouda Nature cheese maturation is the most difficult operation of the whole technological manufacturing process. This paper shall present some of the physical chemical modifications that occur during this kind of Gouda cheese maturation, and the value of these parameters at the end of the validity period.

We consider a model of viscosity $\eta$ of volcanic lavas. The equation, describes with high accuracy the existing experimental data on temperature and pressure dependence of viscosity of igneous materials. It is demonstrated that, the activation energy E(Tg) can be expressed through the glass transition temperature Tgo. The dependencies of the parameters of the viscosity equation are discussed for most of geoscientifically relevant systems. According to the model viscosity of lava depends on the depth inside the ...

A number of scattering and diffraction problems concerning semi infinite wave guides have been solved by many authors and for many years. Theoretical analysis of electromagnetic wave scattering and diffraction problems has been investigated extensively with regard to a number of scatterers which have physical and geometrical discontinuities. As is well-known, Sommerfeld introduced the exact solutions to the diffraction by a wedge by defining the idea of multiple-valued functions. His method is known as the Sommerf...

In this paper we report the experimental measurements of Vp-Vs on Triassic marble samples that are Mugla White and Aubergine from Mugla region. The measurements of P-S wave velocities were performed at room temperature and high confining pressure up to 300 MPa in a heard type pressure vessel at ETH Zurich using the pulse transmission technique on 26 mm diameter cores. The white Mugla marble was isotropic and displayed Vp of 6.86 km/s and Vs of 4.34 km/s at 300 MPa confining pressure. The Aubergine marble from Mugl...

The possibility to obtain a low cost petrurgical material by direct sintering of alkaline basaltic tuffs is demonstrated. The parent rock was milled for 10-15 min and the resulting powder was pressed at 100 MPa. The sintering and the phase formation in air and inert atmospheres were studied by dilatometry and DTA, respectively. The phase composition of obtained samples was evaluated by XRD whereas the stricture was highlighted in details by SEM. Some mechanical and thermal properties of the new materials were meas...

The accumulation Mihoiesti was to ensure, primarily, the water in the area of mines Apuseni Mountains - Rosia Poieni use fall created to produce electricity and other uses of the river basin Aries. Waiving further develop water requirements for the operation of copper Rosia Poieni, imposed, as in the current situation, accumulation conducted to act as temporary accumulation over a period of time greater, with some implications for the function. Currently, the dam does not meet the conditions of safety in operation...

In this study, enhancement and stabilization of photoluminescence (PL) by porous silicon (PS) were investigated. The PS samples were metallized in solutions containing 3 mM NaNO3 metal salt using immersing plating method. The surface bond configuration of PS was monitored by Fourier Transmission Infrared Spectroscopy (FTIR) and it was found that the PS surface was oxidized after the metallization. The PL intensity increased after certain critical immersion times and PL spectrum shifted towards the high energy regi...

Sedimentation of loess deposits in southern, southeastern and eastern Romanian Plain is a consequence of developments in Romanian Carpathian chain and the outer rigid platforms based on global climate changes, which have succeeded in the Quaternary period. The Loess deposition took place in at least two interglacial stages, the last one took place at the end of the upper Pleistocene, when is finalized, mostly the Romanian Plain relief. MostiЕџtea plain is situated at east of Bucharest; the area is bordered by rive...