Gheorghe Damian

Gheorghe Damian
Universitatea Alexandru Ioan Cuza | UAIC · Department of Geology

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65
Publications
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848
Citations
Citations since 2016
12 Research Items
430 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080

Publications

Publications (65)
Article
Full-text available
Sphalerite is an abundant mineral in the hydrothermal deposits from the Baia Mare and Oaș areas (northwestern Romania). Sphalerite samples were analyzed with an electron probe microanalyzer and Raman spectroscopy. The obtained results indicated different amounts of Fe in the various deposits from the Baia Mare and Oaș areas. The sphalerites from Ba...
Article
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The objective of this study is to describe the mineralogical composition and chemical properties of the Oraşu Nou bentonite, from northwestern Romania. For mineralogical determinations, the following were used: X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FR-IR), thermogravimetric analysis, scanning electron microscopy coupled...
Article
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In the current study, different heavy minerals typical of gold placer deposits were identified by means of micro-Raman spectroscopy, and their chemical composition analyzed and discussed (garnet, kyanite, staurolite, zircon, allanite, monazite, xenotime, rutile, anatase, cassiterite, titanite, barite). Even complex solid solution series, such as th...
Article
The effect of applying organo-zeolitic (OZ) amendment in supporting phytoremediation of a copper mine waste dump, using a substrate obtained from Ľubietová, Central Slovakia, was studied. Three plant growth substrates were prepared: (i) the untreated substrate sample from the contaminated site (D–O), (ii) the contaminated sample treated with OZ mat...
Article
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The study of the iron content of natural sphalerites collected from the Breiner-Băiuţ epithermal deposit was performed by combining analytical methods SEM-EDS and micro-Raman spectroscopy. For this study, sphalerites containing chalcopyrite “disease” and homogeneous sphalerites were used. Following SEM-EDS analyzes, iron contents ranging from 1.68...
Article
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The Copşa Mică area is one of the most polluted anthropic sites in Romania. Because higher heavy metal concentrations occur in finer fractions, this research focuses on the size fraction < 500 μm. Two kilograms soil sample was sieved on the 500-μm sieve and was air classified into size fractions down to the low micrometer range. The size fraction’s...
Article
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Natural samples containing tetrahedrite-tennantite, bournonite seligmannite and geocronite-jordanite from the Coranda-Hondol ore deposit (Romania) were investigated by Raman spectrometry in order to determine the capability of Raman spectrometry to provide estimates of solid solutions in three common and widespread sulfosalt minerals series. Raman...
Article
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The chemical composition of phlogopite, tourmaline, and illite from altered rocks of the Nistru Cu-Au-Bi deposit has been examined. Phlogopite of potassic alteration is enriched in fluorine and is similar in chemical composition to phlogopite from potassic alteration at porphyry copper deposits. Tourmaline occurs as three generations. The first-gen...
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The present study focuses on the physical, mineralogical and geochemical characterization of the tailings pond from Straja Valley, resulted from the now abandoned ore-processing plant of Tarniţa (Ostra). In terms of granulometry, around 70% of waste material consists of fine and very fine particles. The sulfides of the waste are pyrite, subordonate...
Article
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Electron microprobe analyses are reported on newly-identified occurrences of Pb–Sb/As sulfosalts from the Coranda-Hondol ore deposit, Certej area, South Apuseni Mountains, Romania. The Coranda-Hondol deposit is an intermediate-sulfidation Au–Ag epithermal system hosted in propylitic altered andesitic rocks covered by Cretaceous and Neogene sediment...
Article
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The Coranda-Hondol ore deposit (Certej, Romania) is a sulfide ore deposit that was mined primarily for gold, silver, lead, and zinc. Secondary minerals were formed through a precipitation process from sulfate solutions with a high concentration of dissolved metals (especially Fe). These sulfate solutions resulted from acid mine drainage. Fourteen w...
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The Sediment Assessment Tool for Effective Erosion Control (SATEEC) acts as an extension for ArcView GIS 3, with easy to use commands. The erosion assessment is divided into two modules that consist of Universal Soil Loss Equation (USLE) for sheet/rill erosion and the nLS/USPED modeling for gully head erosion. The SATEEC erosion modules can be succ...
Conference Paper
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The paper describes sphalerite composition (Fe, Mn, and Cd contents) from five epithermal base-metal deposits of the Baia Mare district: Nistru, Herja, Baia Sprie, Cavnic, and Cisma. Sphalerite is usually featured by X FeS decrease with lowering temperature and sulfur fugacity. Published in: Romanian journal of mineral deposits. 2014. V. 87(1). P....
Article
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Au-Ag- and Ag-tellurides are widely abundant in the vast majority of the “Golden Quadrilateral” (Metaliferi Mts., Romania) ore deposits. Optical microscope observations, electron microprobe and μ-Raman analyses have been successfully carried out to identify Au-Ag-Te minerals from Coranda-Hondol open pit (part of Certej deposit, South Apuseni Mounta...
Article
The new mineral gratianite, MnBi2S4, is described from the Baita Bihor skarn deposit, Bihor County, Romania. Gratianite occurs as thin lamellae, intimately intergrown with cosalite and bismuthinite, or as flower-shaped blebs within chalcopyrite, where it is associated with cosalite and tetradymite. Gratianite displays weak to modest bireflectance i...
Article
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We report new 15 lead isotope analyses performed on galena from different ore deposits in western Romania, by using a high-precision version of MC-ICP-MS method. The data were compared with already published data in the literature and split in 4 distinct groups in 206 Pb/ 204 Pb vs. 208 Pb/ 204 Pb and 207 Pb/ 204 Pb diagrams. Lead isotopes of the N...
Article
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Crystal inclusions (plagioclase, biotite, magnetite) and melt inclusions were studied in minerals of the Laleaua Alba`´ dacite (Baia Sprie, Romania). Electron microprobe analysis of 29 melt inclusions in the plagioclase, K-feldspar, and quartz confirm that crystallization of these minerals took place from typical silicic melts enriched in potassium...
Article
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Soil pollution is one of the key issues requiring priority resolution in a small mining area Baiut - Varatic. A field survey was conducted to investigate the metal contamination in soils of Baiut Varatec base metal mining area, near Baia Mare, northwestern Romania. Based on detailed geochemical and mineralogical analyses, carried out on soil sample...
Article
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Crystalline and melt inclusions were studied in large (up to 2 cm across) dipyramidal quartz phenocrysts from Miocene dacites in the area of the Rosia Montana Au-Ag deposit in Romania. Data were obtained on the homogenization of fluid inclusions and the composition of crystalline inclusions and glasses in more than 40 melt inclusions, which were an...
Article
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The effect of heavy metals’ immobilization with natural zeolitic tuffs and with organo-zeolitic material in soils polluted by Pb, Zn, Cu and Cd affected by the nonferrous metallurgy industry it has been studied in an experiment with Lolium perenne in laboratory and greenhouse conditions. Surface soil samples (0-20 cm) of 100 kg each (as global samp...
Article
Balkan Endemic Nephropathy (BEN) is a disease which appears in the Balkan Peninsula. The starting point for this research is an observation of an overlap of the area where BEN occurs and a geological formation known as the ex-alluvial cone of the Danube of the Sarmatia Sea. Based on the chrome in the water of this geological structure, a direct rel...
Article
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The area of Bozânta tailings management facility, well known after the cyanide spill that occurred in the year 2000, has been evaluated from the point of view of the groundwater quality and the influence of using this resource as a drinking water source on the human exposure. Water samples were collected and analyzed in the laboratory for heavy met...
Article
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Sphalerite at the Cisma deposit (Baiut ore district, Eastern Carpathians, Romania) occurs in two generations formed in different environments. Sphalerite-1 is characterized by a negative correlation between Fe and Mn and precipitated under equilibrium conditions. Sphalerite-2 was deposited in a non-equilibrium environment; it contains chalcopyrite...
Article
Zeolitic tuff (from the region of Barsana, Maramures, Romania) was used in the experimental determinations for retaining the Pb and Zn ions from industrial wastewater. The determination was performed in static regime using 10 g zeolitic tuff/100 cm 3 wastewater (from the slag granulation basin of the metallurgical factory S.C. Romplumb S.A. Baia Ma...
Article
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Abstract Zeolitic tuff (from the region of Barsana, Maramures, Romania) was used in the experimental determinations for retaining the Pb and Zn ions from industrial wastewater. The determination was performed in static regime using 10 g zeolitic tuff/100 cm(3) wastewater (from the slag granulation basin of the metallurgical factory S.C. Romplumb S...
Article
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Raman and infrared spectroscopy has been used to analyze three samples from the Hondol open pit, in order to identify and characterize these samples using vibrational features. The minerals found are secondary hydrated sulfate minerals associated with both the alteration of sulfide-bearing mine wastes and primary minerals. The minerals found by vib...
Article
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Preliminary investigations were carried out on secondary minerals formed by weathering in the Minei Hill open pit (Baia Sprie deposit, Romania). Several samples were analyzed using vibrational spectroscopy (Raman and FT-IR) in order to identify the mineral species formed by the weathering of the main ore minerals. The Raman spectra revealed the pre...
Conference Paper
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Soil pollution by heavy metals in Baia Mare (north-western Romania) is now recognized as a serious risk to the health of the population and the ecological system. It is due to mining and metallurgy.The current paper had the purpose to assess the influence of heavy metals generated in time by mining activities on the environmental quality of the stu...
Article
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The studied area is placed south of the copper plant Baia Mare and was under the impact of gaseous emissions for many years. Heavy metals pollution and landslide caused by pedogenetic conditions were the factors that led to the limitation of land use for agriculture. Based on the physical and chemical characteristics and soil composition profile th...
Article
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Tellurides are significant minerals in gold deposits both as gold carriers and as indicators of PTx-conditions. In the Inner Carpathians belt tellurides are abundant in most deposits of the golden Quadrilateral (Apuseni Mountains) and sporadic in the Banska Stiavnica zone and the Zlata Bania zone. In the presenr paper we describe for first time alt...
Article
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The intrusive rock from Nistru zone represents the subvolcanic suite of the igneous activity from the southern part of the Gutâi Mountains. The subvolcanic magmatic rocks from Nistru zone follow, in succession, the phase of Sarmatian pyroxene andesites. They are spatially associated to the volcanic rocks, being distinguished by morphological and st...
Article
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INTRODUCTION Wide-spread environmental contamination associated with historic mining in Europe has triggered social responses to improve related environmental legislation, the environmental assessment and management methods for the mining industry. Pollution by acid mine drainage (AMD) from ore and coal mining is the outstanding and most important...
Article
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Ag-Bi-sulphosalts are reported from Cu-rich ores within base metal mineralization situated beneath Au-ores below level 750-800 m in the Cremenea vein of the Şuior epithermal vein deposit, Baia Mare region, Romania. Microanalytical data show the presence of a homogeneous unnamed phase with empirical composition [(Ag0.81Cu0.12)0.93Pb0.91(Bi1.11Sb0.06...
Article
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In Baia Mare area there have been studied the control factors of the spatial distribution and mobility within soil profile for Pb, Cu, Zn, Cd in various type of soils, eutricambosol, luvosol, aluviosol. Lead concentration is higher (1429 - 6563 ppm) in Romplumb areal compared to the Cuprom areal (909 - 995 ppm) and is associated with the rich in hu...
Article
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The pollution of the soils with heavy metals, Pb, Cu, Zn and Cd, was studied on a surface over 20.53km 2 of Baia Mare. The total concentration of heavy metals was measured in the upper horizon for the entire surface of Baia Mare city and for each pedogenetical horizon within the soil profiles up to 1.20 m depth in the industrial zones. In both indu...
Article
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Extensive compositional heterogeneity is displayed by Pb-Sb-Au tellurides from the type locality at S \checka\check{\rm{a}} c \checka\check{\rm{a}} rîmb. These phases are collectively considered as varieties of nagyágite in the absence of crystal chemical data confirming the presence of distinct, but topologically closely related compounds. Chemi...
Article
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The concentration and distribution of Pb, Cu, Zn and Cd in the soils from Zlatna and Copşa Mică (Romania) highly polluted by metallurgical activity, have been studied in the soil profile for different types of soils related with the physical and chemical properties of the soils. In Zlatna area, there have been studied the Aluviosol, Dystricambosol...
Article
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The Badenian deposits from the Coştiui zone form a small sedimentary basin in the north of Maramureş depression. The Badenian is disposed discordantly over the Eocene deposits and includes dacitic tuffs having a thickness of about 250m with globigerines. Sarmatian formations represented by marls, marls-sandstone, friable sandstone and sands. In the...
Article
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The concentration of the heavy metals in the soils from the strong affected zones because of the mining and metallurgical industry, Baia Mare and Zlatna (Romania), is significant due to the high values of the contents and association of the four metals Pb, Cu, Zn, Cd. The efficacy of the natural zeolites in heavy metals immobilization from the stud...
Article
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Gold mineralization occurs in the Şoimuş Ilii vein, the main Cu prospect in the Highiş Massif, Western Apuseni Mts., Romania. The Highiş Massif is part of the Highiş Biharia Shear Zone, a 320–300 Ma Variscan greenschist belt, with a 114–100 Ma Alpine overprint. In Highiş, phyllonites enclose an igneous core consisting of an Early Permian basic comp...
Article
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The mineralogical composition of the mine waste dumps influence the chemical composition of the products resulted from the specific weathering reactions of the metallic and gangue minerals. The geochemistry characteristics of the mine waste dump influence natural installation of the plants species. The chemical analysis of the material and of the n...
Article
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Bismuth tellurides (tetradymite, tellurobismuthite and buckhornite) are identified in salband mineralization at Sacarimb. Nagyagite is ubiquitously present, whereas other Au(Ag)-tellurides (sylvanite, petzite, hessite, stützite) and native tellurium are only locally abundant. Tellurides are mainly hosted within Sb-As-sulphosalts, textures indicate...