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This paper reports the results of electron probe x-ray microanalysis (EPMA) aimed at identification of the modes of gold and silver occurrence in loose sediments of lithochemical stream sediments (LSS) of the Dukat gold-silver deposit in northeastern Russia. Modes of occurrence of major ore elements Ag and Au have been investigated and their chemical composition has been identified. The EPMA technique has been elaborated to measure the composition of stream sediments (minerals) containing silver and gold using the...

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...

Fold axial plane traces and schistosity in the high temperature-low pressure regime PreCambrian rocks in Arkansas River region preserve the effects of a succession of 5 FIA trends (foliation intersection or inflection axes in porphyroblasts). Similar fold axial plane trace measurements in high temperature-medium pressure regime Palaeozoic rocks in Vermont preserve the effects of only the youngest two NNW-SSE and NNESSW trending FIAs of the 5 sets that developed in this region. The other three have no equivalent fo...

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 ...

Punching control is the obligatory part of calculation of shallow reinforced concrete footings exposed to considerable concentrated forces through the columns. Complexity of the stress state in the footing supported by deformable bedding requires a detailed theoretical analysis and experimental research, in order to make correct conclusions and confirm the introduced theoretical propositions. In the paper, the fundamental concept of preparation of experimental tests that were carried out on the test samples – fo...

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...

The detailed modeling of sedimentary media (alluvial sediments, deltas, etc.) that form important aquifers is very complex for two reasons. The first is the intrinsic natural heterogeneity of the geological medium and the second is that the data management tools (manipulating geological and hydrogeological data) needed to implement them in the hydrogeological models are not developed enough. The paper presents a software platform containing methodologies and tools that facilitate the integration of the 3D geologic...

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...

The Tekirova (Antalya) ophiolite is located at the southwestern part of the Antalya complex along the Tauride belt in southern Turkey. The Tekirova (Antalya) ophiolite pseudostratigraphy such as, in an ascending order: harzburgitic tectonites, ultramaficmafic cumulates, isotropic gabbros and sheeted dikes. Comagmatic volcanics rocks in the Tekirova ophiolite are not preserved and metamorphic sole rocks under the harzburgitic tectonites. Numerous isolated dikes, ranging in thickness from 5 cm to 10 m, intruded the ...

Heavy metals existing over a limit due to being used industrially or naturally found on rock, in underground water and soil effects ecological system and human life negatively. Researchers have developed different methods for the observation of these metals which influence ecological system and human life. The aim of this study is to explain the graded extraction method with an example which is one of the analysis methods used in the detection of ratio of heavy metals (sample: Al, Mn) that are found in Coastal San...

Turkey is located in a geographical region on a combination of different climatic conditions. Climatic conditions are controlled by temperature and humidity. In this study, the effect of climatic conditions on the uniaxial compressive strength of natural building stones were investigated by using 7 different types of rocks such as granite, limestone, travertine and tuff sampled from different parts of Turkey. First group of experimental studies was conducted to find out the frost resistance of some of the studied ...

Large Dams are a particularly important case of seismic risk assessment. On the one hand, the dams themselves have a high value, having implications for the whole economy, through the production of electricity, water supply systems for irrigation and flood prevention, etc. On the other hand, structural damage of a dam can lead to major disasters, the population exposure to effects caused by sudden floods. The situation in Romania is such a kind that should be given to the future safety of existing dams. The first ...

Economical conditions, Kosova after war, geological construction and also the perspectives of mineral exploration in the definite areas of Kosova has influenced that our territory to be of special importance for many researches that have arose interest to many companies whether international and local companies. Structurally, geology of Kosova is divided in two parts represented in East by Vardar area and in West by Sharr-Korab and Drino-Ivanjice area) of the one part and the other part of NNE – SSW direction be...

For a better definition of the Actual Climatic Optimum (the so called “global warming”) a detailed analysis of the Holocene climate is imperative. This paper broaches this analysis from the perspective of the “mini-glaciations” climatic cycle with a 1,000 yrs period which a series of authors took into consideration. The causes of these cycles are represented by periodical variations of the solar activity. But our analysis has covered a larger stratigraphical interval (23,000 yrs) including the W\"urm III s...