Physical Sciences and Mathematics Commons^™

In Memorium, Vlad Codrea, Ioan Bucur, Constantin Ianoliu, Iustinian Petrescu

Studia UBB Geologia

No abstract provided.

Evolution De La Biosphère Et Événements Géologiques, Ioan I. Bucur

Studia UBB Geologia

No abstract provided.

Considerations Sur La Limite Dacien-Romanien, Constantin Enache, Ion PăTruțoiu

Studia UBB Geologia

An approach to the Dacian-Romanian limit. The aim of this study is to emphasize the idea’s evolution related to the Dacian-Romanian limit in Oltenia, and to emphasize some conclusions on this problem. The magnetostratigraphic studies shown the presence of the Gauss-Gilbert limit between the XIth and XIIth coal seams. This limit can be paralelised to the Dacian-Romanian boundary. The Cochiti event corresponds to seams VIIth and VIIIth, and can be designated as the boundary between the Parscovian and Siensian.

Lithostratigraphy Of The Miocene Deposits In The Eastern Part Of Borod Basin (North-Western Of Romania), Mirela Popa

Studia UBB Geologia

The paper presents the lithostratigraphic units of the Miocene deposits in the eastern part of Borod Basin. Four lithostratigraphic units were defined (Borod Formation, Cornitel Formation - including Borozel Member - and Beznea Formation) according to the recommendations of the International Stratigraphic Guide.

Badenian Mollusks From Rachitova (Hateg Depression, Romania), Mirela Popa, Constantin Ianoliu

Studia UBB Geologia

The paper presents in systematic order the mollusk assemblage collected from one outcrop on Lacului Brook (left tributary to Răchitova Valley). There were identified 33 taxa (22 gastropods, 9 bivalves and 2 scaphopods) and the whole assemblage is characteristic to the Badenian deposits in the studied area.

The Presence Of Lower Miocene (Eggenburgian) In Borehole 575 Cetea (East Of Borod Basin, Nw Romania), I. Petrescu, M. Popa, N. Bican-Brișan

Studia UBB Geologia

The microfloral record evidenced in borehole 575 Cetea is very rich, consisting of 114 taxa, some of them being new species for the Tertiary of Romania. At the same time, it includes species of Eggenburgian age of the host rocks. The whole microflora assemblage suggests a forest-type vegetation developed in a warm, subtropical climate, characteristic for the Eggenburgian age of the Early Miocene. The Eggenburgian of Romania shows the same microfloral features as the Eggenburgian of Central Paratethys.

Upper Jurassic - Lower Cretaceous Deposits In The South-Western Part Of Padurea Craiului. Formal Lithostratigraphic Units, Ioan Cociuba

Studia UBB Geologia

The paper describes the Upper Jurassic – Lower Cretaceous deposits of the Bihor Unit from Pădurea Craiului Mountains, according to the International Stratigraphic Guide. All the previously described formations are included; besides, new formations are defined in case of deposits which were not previously described in agreement with this code. The Upper Jurassic units here described are Vad, Cornet, Aştileu, and Albioara Formations (the last one divided into Secătura and Valea Cuţilor Members). The corresponding Lower Cretaceous units are: Blid Formation (divided into Dobreşti and Coposeni Members), Ecleja Formation (partly divided into Gugu and Valea Bobdei Members), Valea Măgurii, and …

Badenian (Middle Miocene) Calcareous Nannofossils From Paglisa (Cluj District): Biostratigraphical Importance, Carmen Chira, Erika Szabo, Constantin Ianoliu

Studia UBB Geologia

The calcareous nannofossils from the Middle Miocene (Badenian) formations from Pâglişa (Cluj district) are typical for the Lower and Middle Badenian, respectivelly Moravian and Wielician (or Langhian). The detailed study of the calcareous nannofossils from the Pâglişa section revealed the presence of the nannoplankton assemblages belonging to the NN5 and NN6 zones. They have been remarked 40 species of calcareous nannofossils. There are mentioned especially the most representative species and their biostratigraphical significance.

New Data Concerning The Age Of Mesozoic Limestone From Scarisoara (Bihor Mountains), Ioan I. Bucur, Bogdan P. Onac

Studia UBB Geologia

Microfacies and micropalaeontologic studies on some limestone samples collected within the Scărişoara Glacier Cave are presented. The investigation pointed out that the age of the limestone around Scărişoara Cave is of Upper Jurassic (Kimmeridgian) age and not Triassic as it was considered in most of the studies.

Genesis Of Magmatic Derived Ore Deposits. 4 – Hydrothermal Metallogeny (Geneza Zăcămintelor De Origine Magmatică. 4 – Metalogenia Hidrotermală); A Şti Sau A Nu Şti. Adevărurile Vieţii Lui Emil Racoviţă, CăLin G. TăMas̡, Bogdan Petroniu Onac

Studia UBB Geologia

No abstract provided.

Heavy Metal Soil Content As An Indicator Of Pollution, Ana-Maria Rusu, William Dubbin, Nicolae Har, Katalin Bartok, William Purvis, Ben Williamson

Studia UBB Geologia

Two soil sample series were collected from 7 contaminated sites situated along a transect from the pollutant source, Zlatna copper ore-processing plant, and analyzed using different analytical methods. The soils collected in 1998 were analyzed by inductively coupled plasma-atomic emission spectrometry (ICP-AES) after extraction with DTPA for trace metals and those collected in 1999 were analyzed with flame atomic absorption spectrometry (FAAS) following two acid digestion procedures. The DTPA extraction procedure produced lower results than the acid digestions. Also, the pH values for all samples was measured and the results obtained during autumn compared with those in spring after a …

Minerale Geme Asociate Genetic Ofiolitelor Mezozoice Si Gheizeritelor Neogene, Din Muntii Apuseni De Sud, Ioan MâRza, Ciprian Constantina

Studia UBB Geologia

The paper studies the geological formations of the Geoagiu- Hărţăgani- Vălişoara- Brad region (Southern Apuseni Mountains) focusing on the content in gems minerals. Based on the field and laboratory reasearch, several perimeters of geological interest have been identified: Luncoiu Valley- Lunga Valley, Vălişoara Valley- Orăzii Valley, Baiţa-Crăciuneşti, Hărţăgani and Sanatoriu (Brad). Geologically, the minerals of gem quality (quartz, chalcedony, jasper) and they associate genetically and spatially with ophiolites, with the exception of the Brad silicolite- gems which represent geyserites generated by the neogene volcanism.

Precise U-Pb Zircon Dating Of The Syenite Phase From The Ditrau Alkaline Igneous Complex, Dinu Pană, Ioan Balintoni, Larry Heaman

Studia UBB Geologia

The Ditrău igneous complex represents the largest alkaline intrusion in the Carpathian-Pannonian region consisting of a plethora of rock types formed by complicated magmatic and metasomatic processes. A detailed U-Pb zircon age study is currently underway and the results for the syenite intrusion phase is reported herein. The U-Pb zircon emplacement age of the syenite of 229.6 +1.7/-1.2 Ma documents the quasi-contemporaneous production and emplacement of the gabbro and syenite magmas. We suggest that the syenite and associated granite formed by crustal melting during the emplacement of the mantle derived gabbroic magma around 230 Ma. The thermal contact aureole produced …

New Data Concerning Mn Bearing Minerals From Rosia Montana, Metaliferi Mountains, Romania, Marcel Benea, Laurent Bailly, CăLin G. TăMaș

Studia UBB Geologia

The paper gives new evidences on some mineral species from Romanian epithermal ore deposits. Microprobe analyses were used to identify the chemical composition of gangue and alteration minerals from Roşia Montană gold deposit. Special attention was given to rhodonite, rhodochrosite, and adularia.

Major Elements Geochemistry Of The Breiner Baiut Ore Deposit (Gutai Mountains, Eastern Carpathians), Dan Costin

Studia UBB Geologia

The Breiner Băiuţ epithermal vein – type deposit is basically a base metal ore body with important amounts of gold and silver. The frequency distribution pattern of the major elements (Au, Ag, Pb, Zn, Cu, S) is complex in many cases, but at some mining levels it is lognormal. The correlation coefficient "r" has been calculated for six pairs of major elements. The values are positive and indicate strong correlations between these elements. The average grades values for each major element at all levels have been used to highlight the vertical variation of chemistry of the mineralization. The ore body …

Geologic And Isotopic Models For The Carpathian Crystalline Evolution, Ioan Coriolan Balintoni

Studia UBB Geologia

The majority of Carpathian metamorphics protoliths have TDM model Sm/Nd ages between 1.6 and 2.0 Ga. This suggests an important episode of continental crust formation after the 2.0 Ga. The Biharia lithogroup (Apuseni Mountains) and the Tulghes lithogroup (East Carpathians) furnished Zircon U/Pb ages from metagranitoids and acid metavolcanics, respective, around 500 Ma; this is a sign of existence of some Lower Proterozoic protoliths among Carpathian metamorphics. The bimodal intrusions which are piercing the volcano-sedimentary sequence of Paiuseni lithogroup in Highiş Massif (Apuseni Mountains) have given Permian ages on Zircon U/Pb data. The Paiuseni lithogroup probably represents the fill of …

Diffusion Coronas Around Quartz Xenocrysts In Basaltic Andesite From Capus (Cionca Hill, Gilau Mountains - Romania), Nicolae Har, Ana-Maria Rusu

Studia UBB Geologia

Diffusion coronas consisting of Al – poor pyroxene (augite), glass and silica polymorphs are developed around the quartz xenocrysts in the olivine basaltic andesite from Cionca Hill (Gilău Mountains). The quartz of xenolitic origin was magmatically corroded and sometimes reacted with the basaltic melt. According to the time of coexistence between quartz and the basaltic melt, two different spatial disposition of the pyroxene of reaction can be noticed. For a shorter reaction time the Al – poor pyroxene are commonly tangentially to the quartz rim while for the crystals which presumably had longer reaction time the pyroxene are radially from …

Date Noi Privind Compozitia Mineralogica A Siltului Lutitic De La Dumbrava, Judetul Cluj (New Mineralogical Data On The Clayey Silt From Dumbrava (Cluj County), Lucreția Ghergari, Corina Ionescu, Cristina Mariș

Studia UBB Geologia

New Mineralogical Data on the Clayey Silt from Dumbrava (Cluj County). New mineralogical data on the lutitic silt occurrence from the Dumbrava (Cluj County, Romania), based on TEM and X-ray diffraction studies, are presented in the paper. Mainly kaolinite, and subordinately illite and illite/montmorillonite represent the mineralogical compounds of the clayey fraction of the rock. The lutitic silt represents a local facies, sedimented in subaquatic environments (a small lake or pool) after a short-distance transport from the sources. The source for the brown clays was probably a paleosoil formed nearby magmatic rocks. The source for the light coloured clays (creamy …

Igneous Protoliths Of The Biharia Lithotectonic Assemblage: Timing Of Intrusion, Geochemical Considerations, Tectonic Setting, Dinu Pană, Ioan Balintoni

Studia UBB Geologia

The oldest U/Pb isotopic age data for the Apuseni Mountains were determined from the Biharia meta-igneous assemblage. Two granitoid bodies yielded 489,6 ± 6,9 Ma and 502 ± 4,2 Ma ages. The geochemical data suggest an island arc tectonic setting for the Biharia meta-igneous protholits.

Removal Of Bisphenol A Model Compounds And Related Substances Using Octolig®, Rachael Josephine Alessio

USF Tampa Graduate Theses and Dissertations

Bisphenol A used in the production of polycarbonate plastics and epoxy resins is ubiquitous in the environment. The raw material is released to the environment during the manufacturing process and by leaching from consumer products. Recent studies are suggesting that low-dose amounts of Bisphenol A may have adverse health effects on humans. The possibility of removing Bisphenol A from natural water sources or from solvents used to extract the material from consumer products before they enter the market has been studied. The use of model compounds and related substances (4-isopropylphenol, 4-(t-butyl) phenol, and nitrophenols) have been used to study their …

Compound-Specific Stable Isotopic Analysis Of Protein Amino Acids: Ecological Applications In Modern And Ancient Systems, Greg Ellis

USF Tampa Graduate Theses and Dissertations

Stable isotopic analysis of the major biochemically important elements is an increasingly utilized tool in the study of ecology. Patterns of isotopic fractionation in carbon and nitrogen are used to determine trophic linkages, nutrient pathways, and sources of primary production in numerous contexts. Traditional techniques rely on measurements made of bulk samples such as tissue, but emerging methods using individual chemical compounds provide a means of achieving deeper understanding in a variety of inquiries.

Amino acids, as the building blocks of proteins, are the dominant nitrogen-bearing biomolecules and are a major constituent of all life. Patterns of isotopic fractionation during …

Synthesis And Characterization Of Nanocomposites For Electrochemical Capacitors, Farah Alvi

USF Tampa Graduate Theses and Dissertations

Presently there are deep concerns over the environmental consequences and the consumption of non-renewable energy sources, with the accelerated greenhouse effect, triggered enormous interest in the use of renewable energy sources e.g., solar, hydropower, wind and geothermal. However the intermittent nature of harvesting renewable energy sources has recently gained considerable attention in the alternative reliable, cost effective, and environmentally friendly energy storage devices. The supercapacitor and lithium ion batteries are considered more efficient electrical energy storage devices than conventional energy storage systems.

Both devices have many useful and important applications; they could be an excellent source for high power and …

A Ctd Biotag For Mid-Sized Marine Predators, Heather Broadbent

USF Tampa Graduate Theses and Dissertations

Biologging tools for investigating the study of fine-scale linkages between animal behavior and the physical microstructure of the marine habitat are technically limited by substantial size, high cost or low sensor resolution. However, recent advances in electronic technologies and process techniques present attractive alternatives to current tag designs. Motivated by the need for a low-cost, compact CTD biotag for medium-sized marine animals, the University of South Florida Center for Ocean Technology developed a multi-sensor biotag for quantitative measurements of ocean salinity. This dissertation describes the development and performance of a novel CTD biotag used for animal-borne measurements of the physical …

Hydrologic And Microclimate Characterizations Of Thornton’S Cave, West-Central Florida (Usa), Dorien K. Mcgee

Studia UBB Geologia

A cave’s environment is controlled by a suite of factors unique to the environments in which they formed, including, but not limited to, regional geologic and climate settings. These factors collectively owe to wide variations in cave biology, geomorphology and overall speleogenesis. This report combines local climate, hydrologic, and CO₂ data collected over the course of a two-year study at Thornton’s Cave, a partially-flooded cave in the West-Central Florida karst belt, to characterize its current environment and yield insight regarding how changes in regional climate and hydrology impact its past and future speleogenesis. Data loggers continuously monitoring cave and …

Sedimentary Succesion Of The Lower Cretaceous Deposits From The North-Western Part Of Pădurea Craiului (Apuseni Mountains, Romania), Daniel F. Lazar, Ioan I. Bucur, Ioan Cociuba, Emanoil Sasaran

Studia UBB Geologia

Within the general succession of the Lower Cretaceous deposits from the Vârciorog-Dobreşti area (Pădurea Craiului Mountains), carbonate and terrigenous deposits were identified. The limestones were assigned to two distinctive lithostratigraphic units: the Valea Măgurii and Vârciorog formations. Based on the orbitolinids Palorbitolina lenticularis and Mesorbitolina texana their ages are assigned to the early Aptian, and respectively late Aptian–Albian. The terrigenous facies mainly include fine grained deposits (clays, siltites, marls) and, to a lesser extent, coarser ones (glauconitic sandstones and conglomerates), and they are attributed to the Ecleja and Vârciorog formations. The marls of the Ecleja Formation have been observed in …

The Importance Of Craniofacial Sutures In Biomechanical Finite Element Models Of The Domestic Pig, Jen A. Bright

School of Geosciences Faculty and Staff Publications

Craniofacial sutures are a ubiquitous feature of the vertebrate skull. Previous experimental work has shown that bone strain magnitudes and orientations often vary when moving from one bone to another, across a craniofacial suture. This has led to the hypothesis that craniofacial sutures act to modify the strain environment of the skull, possibly as a mode of dissipating high stresses generated during feeding or impact. This study tests the hypothesis that the introduction of craniofacial sutures into finite element (FE) models of a modern domestic pig skull would improve model accuracy compared to a model without sutures. This allowed the …

Calcareous Nannofossils And Sedimentary Facies In The Upper Cretaceous Bozeş Formation (Southern Apuseni Mountains, Romania), Ramona Balc, Lóránd Silye, Luminita Zaharia

Studia UBB Geologia

The lithology, sedimentology and biostratigraphy of the Bozes Formation, which crop out in the SE Metaliferi Mountains (Apuseni Mts.) have been investigated in order to establish the age of the deposits and the depositional environment.

The sedimentary structures and facies are interpreted as indicating a deep-water depositional environment, representing part of a submarine fan lobe. Three facies assemblages have been identified and described. Calcareous nannofossils were used to determine the age of the investigated deposits. The presence of Lucianorhabdus cayeuxii and Calculites obscurus indicates the CC17 biozone, while UC13 Zone is pointed out by the continuous occurrence of Arkhangelskiella cymbiformis …

Vent-Fault Spatial Study Of Selected Volcanic Fields Of Southwestern North America And Mexico, Michelle Leonard

USF Tampa Graduate Theses and Dissertations

Of fundamental concern in volcanic hazard and risk assessment studies of volcanic systems is what role crustal structures might play in the ascent of magma through the crust. What are the processes that govern the spatial distribution and timing of eruptions, especially in populated areas or near sensitive facilities? Many studies have drawn the conclusion that faults play a critical role as easily–exploitable crustal weaknesses along which magma can ascend. Great care must be used when assuming a causative relationship between patterns of vents and faults especially when such relationships may be incorporated into hazard assessment models or other forecasting …

A Mineralogical Study Of Late Bronze Age Ceramics From Palatca (Transylvania, Romania), Lucretia M. Ghergari, Carmen Stâncel

Studia UBB Geologia

Our paper studies the mineralogical and petrographical characteristics of 28 ceramic fragments that were excavated in the village of Palatca, Transylvania (Romania). Optical microscopy, X-Ray powder diffraction (XRD), scanning electron microscopy (SEM), grain size analyses, and porosity measurements were used to investigate the samples. Our objective was to describe or reconstruct the corresponding products and to elucidate the manufacturing process, the firing techniques, and the transformation pathways. Based on our results, we conclude that the Late Bronze Age ceramics (1600-1300 BC) were produced from clay and temper material such as river sand and ceramoclasts. It has been modeled by hand …

Parts Of The Whole: Learn More, Learn Better, Dorothy Wallace

Numeracy

Building on previous columns in Numeracy, this column analyzes various teaching techniques in terms of their ability to build cognitive schema, extend existing schema, reinforce learning, move mean understanding of a group of students, and reduce variance in understanding of a group. We offer a pedagogical cycle as an example of how to address multiple learning goals using common teaching methods.