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Articles 1 - 17 of 17
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Development Of A Low-Cost Tool For The Compositional Measurement Of Gases Derived From Mineral Water Wells From The Eastern Carpathians, Szalay Roland, Kis Boglárka-Mercedesz
Development Of A Low-Cost Tool For The Compositional Measurement Of Gases Derived From Mineral Water Wells From The Eastern Carpathians, Szalay Roland, Kis Boglárka-Mercedesz
Studia UBB Geologia
The Eastern Carpathians host CO2-rich, low temperature, dry gas vents, bubbling pools and wells/drillings, which were established for the extraction of mineral water and CO2 for the bottling industry. These wells can provide important information on the structure of the geological deposits, the depths, and the source of the gases, because they are often located at important geologic/tectonic sites. Our aim was to test the applicability of a hand-made and low-cost tool in preselected wells/drillings, in order to measure the concentration of different gas species. This was challenging due to the high water and gas discharge of …
Paleocene "Flysch-Type" Agglutinated Foraminifera From The Northern Part Of The Eastern Carpathians (Romania), Raluca Bindiu-Haitonic, Sorin Filipescu
Paleocene "Flysch-Type" Agglutinated Foraminifera From The Northern Part Of The Eastern Carpathians (Romania), Raluca Bindiu-Haitonic, Sorin Filipescu
Studia UBB Geologia
Representative assemblages of agglutinated foraminifera from the Paleocene deposits of the Suha outcrop in the Tarcău Nappe (Eastern Carpathians, Romania) were analyzed using diversity indices, morphogroups and foraminiferal biofacies in order to describe the paleoenvironmental and palaeobathymetrical conditions of the studied area. The results suggest bathyal environments, close to the Carbonate Compensation Depth (CCD) and a flysch type biofacies. The assemblages are dominated by coarsely agglutinated flysch-type taxa: tubular (Nothia, Rhizammina, Rhabdammina), globular (Saccammina), flattened planispiral and streptospiral (Rzehakina) and flattened streptospiral forms (Paratrochamminoides and Trochamminoides). The agglutinated foraminifera morphogroups display variations …
Bioerosive Structures In Orbitolinid Foraminifera: Examples From The Lower Cretaceous Of Central Iran, Felix Schlagintweit, Ioan I. Bucur, Koorosh Rashidi, Behnam Saberzadeh
Bioerosive Structures In Orbitolinid Foraminifera: Examples From The Lower Cretaceous Of Central Iran, Felix Schlagintweit, Ioan I. Bucur, Koorosh Rashidi, Behnam Saberzadeh
Studia UBB Geologia
Lower Cretaceous orbitolinid assemblages from Central Iran yield various bioerosional structures. The omnipresent traces of different boring taxa and groups (e.g., sponges, calcimicrobes, incertae sedis) represent a characteristic feature of the investigated thin-section material. The assemblage can be attributed to the Entobia ichnofacies dominated by borings assigned to the activity of sponges. The boring galleries are often concentrated in a plane parallel to the test surface, along the boundary of the marginal and the central zone of the orbitolinid tests. The borings are observed in foraminiferan-dasycladalean wackestones to poorly washed-out packstones, which can be referred to a subtidal …
Eocene-Oligocene Calcareous Nannofossils From Huedin Area, Between Hodis And Tetis (Transylvania, Romania): Biostratigraphy And Paleoecological Data, Carmen Chira, Alin Igrițan
Eocene-Oligocene Calcareous Nannofossils From Huedin Area, Between Hodis And Tetis (Transylvania, Romania): Biostratigraphy And Paleoecological Data, Carmen Chira, Alin Igrițan
Studia UBB Geologia
Eocene - Oligocene deposits from Huedin area, between the localities Hodiş and Tetiş, of the Transylvanian Basin, have been analysed. The assemblages of calcareous nannofossils are rich in the Brebi and Mera formations and relatively scarce in almost all other formations.
The Mesozoic Carbonate Deposits From The Borehole 6042 Deleni (Transylvanian Depression), Ioan I. Bucur, Marcel-Adrian Piteiu, Emanoil SăSăRan
The Mesozoic Carbonate Deposits From The Borehole 6042 Deleni (Transylvanian Depression), Ioan I. Bucur, Marcel-Adrian Piteiu, Emanoil SăSăRan
Studia UBB Geologia
The borehole 6042 Deleni is among the few wells located in the central part of the Transylvanian Depression that crossed the rocks in the basement. Among these, the Mesozoic deposits were cross-cut along 916 m. Based on the investigations carried out on core samples from the Mesozoic deposits three carbonate units attributed to the Late Oxfordian -Tithonian (?Neocomian) have been separated. A preliminary evaluation of the terrigenous and carbonate-terrigenous deposits overlaying the carbonate ones indicated an Aptian-Albian, respectively Senonian age. Considerations on the paleoenvironment of the Mesozoic deposits studied are also presented.
Microfacies Of The Triassic Limestones In The Piatra Soimului Klippe (Transylvanian Nappes Rarau Syncline, Eastern Carpathians, Romania), Daniela Popescu, Liviu Popescu
Microfacies Of The Triassic Limestones In The Piatra Soimului Klippe (Transylvanian Nappes Rarau Syncline, Eastern Carpathians, Romania), Daniela Popescu, Liviu Popescu
Studia UBB Geologia
The Piatra Şoimului klippe belongs to the allochtonous sedimentary succession of the Transylvanian Nappes in the Rarău Syncline. It is situated on the western flank of the syncline over the Callovian – Oxfordian jaspers. The identified micropaleotologic association consists of dasycladales, foraminifera, sphynctozoa, echinoderms, etc. which indicate Pelsonian–Norian age. The microfacies of these limestones demonstrate the origin of Piatra Şoimului klippe from a previously carbonate platform situated to the west of the Bucovinian sedimentary domain. The correlation between the allochemic and ortochemic components described in the numerous microfacies types proves that the Triassic sedimentation took place in an internal platform …
The Miocene Calcareous Nannofossils From Bistriţa Area (Transylvania, Romania), Carmen Chira, Ana-Maria Vulc
The Miocene Calcareous Nannofossils From Bistriţa Area (Transylvania, Romania), Carmen Chira, Ana-Maria Vulc
Studia UBB Geologia
The Middle Miocene (Badenian, Sarmatian and Pannonian) deposits from the region of Bistriţa, between the localities: Susenii Bârgăului, Livezile, Bistriţa, Sărata, Sărăţel, Budacu de Sus (Transylvanian Basin) have been analysed from the nannofloral point of view. The nannofossils are relatively scarce, excepting the ones related to Lower Badenian deposits. Only the fossil index for NN5 Zone – Sphenolithus heteromorphus, and for NN6 Zone – Discoaster exilis have been identified.
A Study On The Geology Of The Ţaga Region (Cluj District), Ioan MâRza
A Study On The Geology Of The Ţaga Region (Cluj District), Ioan MâRza
Studia UBB Geologia
The geological formations from Ţaga area (Cluj District) are Sarmatian in age (in outcrops) and Badenian (under surface). Lithologically, they are represented mainly by sands and sometimes fine sediments (clays, marls), interbedded with volcanic tuffs a low fossil content. The Badenian is the host of gas accumulations, concentrated in dome structures.
Microbial Structures And Microencrusters In The Upper Jurassic - Lower Cretaceous Deposits From Buila-Vânturariţa Massif (South Carpathians), Andreea Ut̡A, Ioan I. Bucur
Microbial Structures And Microencrusters In The Upper Jurassic - Lower Cretaceous Deposits From Buila-Vânturariţa Massif (South Carpathians), Andreea Ut̡A, Ioan I. Bucur
Studia UBB Geologia
The Upper Jurassic – Lower Cretaceous limestones from Buila-Vânturariţa massif partly consisting of reef build-ups, are characterised by an important component of microbial organisms. This paper describes and illustrates some of the most important structures interpreted as having a microbial nature: “Tubiphytes” and Bacinella-type structures, cyanobacterial structures, micritic crusts, and peloidal structures. Most of these structures are related to different shallow-water environments, from intertidal, high-energy environment, to protected low energy subtidal environment.
Arenite Concretions With Axial Channel From The Badenian Deposits Of Cheia (Turda) - A New Type Of Concretions, Ioan Mârza, Ciprian Constantina, Horea PâRlea
Arenite Concretions With Axial Channel From The Badenian Deposits Of Cheia (Turda) - A New Type Of Concretions, Ioan Mârza, Ciprian Constantina, Horea PâRlea
Studia UBB Geologia
The paper introduces a new type of arenite concretions (max. 40-50 cm in diameter). Spheroidal concretions with an axial cylindrical channel (1-6 cm in diameter) resulted from the levigation of the concretion centre consisting of soft fusiform clasts with a clayey-carbonate composition. The concretions are hosted by a level of Badenian sandstones and microconglomerates (about 10-m thick) which occur in the place called “Groapa cu Piersici” (Cheia, Turda).
The Spatial Extension And The Age Of The Tomnatec Formation In Audia Nappe, Liviu Ionesi, Florin Florea
The Spatial Extension And The Age Of The Tomnatec Formation In Audia Nappe, Liviu Ionesi, Florin Florea
Studia UBB Geologia
No abstract provided.
Major Elements Geochemistry Of The Breiner Baiut Ore Deposit (Gutai Mountains, Eastern Carpathians), Dan Costin
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 …
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
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 …
New Data On The Upper Jurassic–Lower Cretaceous Limestones From Bihor Mountains: Case Study Of Gârda Seacă-Hodobana Region, Romania, Valentin Turi, Emanoil Sasaran, Ioan I. Bucur
New Data On The Upper Jurassic–Lower Cretaceous Limestones From Bihor Mountains: Case Study Of Gârda Seacă-Hodobana Region, Romania, Valentin Turi, Emanoil Sasaran, Ioan I. Bucur
Studia UBB Geologia
This study refers to some problems regarding the lithological succession, facies and carbonate microfacies, and to biostratigraphic markers of the Upper Jurassic-Lower Cretaceous carbonates from Bihor Mountains. Three types of facies (external marginal facies, subtidal and peritidal facies) were separated for the Upper Jurassic, and two (coastal-peritidal and open shelf facies) for the Lower Cretaceous carbonates. The micropaleontological assemblages identified contain species that allow the separation of the two formations of different age: Labyrinthina mirabilis, Kurnubia palastiniensis, Neokilianina rahonensis, Clypeina sulcata (Kimmeridgian-Lower Tithonian) and Parakoskinolina? jourdanensis, Montseciella arabica, Palorbitolina lenticularis, Falsolikanella danilovae (Barremian – Lower Aptian). Field observations and data …
Mineral Chemistry Of Some Agates From Gurasada (Mures Valley, Romania), Ovidiu G. Iancu, Dorel P. Toda, Gabriela Iancu
Mineral Chemistry Of Some Agates From Gurasada (Mures Valley, Romania), Ovidiu G. Iancu, Dorel P. Toda, Gabriela Iancu
Studia UBB Geologia
The paper presents the study of some agates from the Gurasada area (Mures Valley, West Romania) and their igneous host rocks. Agates occur in the vesicles of strongly altered pyroclastic rocks (“banatites”), such as basaltic andesites, trachyandesites, trachytes and dacites or in the alluvial sediments along the Gurasada valley. The age of host-rocks is Late Cretaceous-Early Paleogene. Agates consist mainly of various types of α-quartz such as: chalcedony, quartzine and microquartz, associated with moganite. The genesis of agates is related with the hydrothermal solutions which altered the host-rocks.
Archaeometric Comparison Between The Neolithic Pottery Of Different Cultures At The Archaeological Site Of Alba Iulia (Transylvania, Romania), Bruno Fabbri, Mihai Gligor, Sabrina Gualtieri, Simona Varvara
Archaeometric Comparison Between The Neolithic Pottery Of Different Cultures At The Archaeological Site Of Alba Iulia (Transylvania, Romania), Bruno Fabbri, Mihai Gligor, Sabrina Gualtieri, Simona Varvara
Studia UBB Geologia
A large quantity of pottery has been discovered at the Lumea Nouă Neolithic and Eneolithic settlement in Alba Iulia City (Romania). It belongs to different cultures, and in this paper a comparison among three of them is made: Vinča, Lumea Nouă and Foeni. An analogous number of samples has been selected for each of the three cultures, together with some clay samples collected in the Alba Iulia settlement area. The samples have been analysed by means of XRF, XRPD, and in thin section. Significant differences among the three cultures are only related to the alkalis contents. The Lumea Nouă pottery …