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A Novel Conceptual Model Of Intrusion Related Gold Bearing Systems And Exploration Tools, Eugen Orlandea, Şerban-Nicolae Vlad

Studia UBB Geologia

Despite numerous debates conducted in the last two decades, the concept of intrusion related gold systems IRGS remains controversial and sometimes befuddling. The key issue drifts from case to case, i.e., initial to subsequent proposed classifications, presence of gold in reduced fluids-porphyritic environments, non-porphyry gold in orogenic terrains and participation of non-magmatic gold fluids in depositional processes. Trying to avoid atypical or particular aspects of certain deposits, a genuine metallogenetic depiction intends to enhance the intrusion related systems meaning. Gold is either a major constituent or a mere byproduct. A vertical metal zonation develops from surface to depth: Au, Ag …

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 …

A Middle Miocene Rhinoceros Find In Transylvania: 19Th Century Forgotten Correspondence, Vlad A. Codrea, Márton Venczel

Studia UBB Geologia

The single report in Romania of the Middle Miocene rhinoceros Brachypotherium brachypus, a rare species in our country or elsewhere in Europe, is from Petros locality in Hațeg basin. This find is an old one, nearly a century and half ago. A fragmentary letter written by the Hațeg naturalist Ádám Buda to Prof. Antal Koch retrieved in the Paleontological Museum of Babeș-Bolyai University Cluj-Napoca brings some light about this find. The letter was probably written around 1881-1882 and reveals the active exchanges of scientific data between the professor from Cluj and country people interested in natural sciences.

Review “A Memoir Of My Life And Work”, Bica Ionesi, Junimea Publishing House, Iaşi, 2015, Ioan Mârza

Studia UBB Geologia

No abstract provided.

Late Oligocene Calcareous Nannofossils From Albanian-Thessalian Intramontane Basin (Bozdovec Section, Albania) – A Quantitative Approach, Mădălina-Elena Kallanxhi, Stjepan Ćorić, Arben Koçiu

Studia UBB Geologia

Quantitative and semi-quantitative analyses of calcareous nannofossils were performed on samples collected from Bozdovec Section (Albanian-Thessalian intramontane basin, Albania). The calcareous nannofossil assemblages are dominated by: small reticulofenestrids, Cycligargolithus floridanus, Coccolithus pelagicus, Sphenolithus spp., Reticulofenestra scrippsae, Helicosphaera spp., Clausicoccus spp., Reticulofenestra bisecta, Cycligargolithus abisectus. Biostratigraphically, the studied outcrop is assigned to the Late Oligocene NP25 - Sphenolithus ciperoensis Zone. In the Mediterranean area, this interval can be correlated with the MNP25a - Sphenolithus ciperoensis Zone, while according to the zonation for low to middle latitudes the investigated material would belong to the CNO5 - Sphenolithus …

Foraminiferal Biostratigraphy And Paleoenvironments Of The Middle Eocene Deposits From The Northern Part Of The Tarcău Nappe (Eastern Carpathians, Romania), Raluca Bindiu, Sorin Filipescu

Studia UBB Geologia

Middle Eocene foraminiferal assemblages have been analyzed from three representative sections of bathyal deposits cropping out along the Brodina Valley and Voroneţ Valley in the northern part of the Tarcău Nappe (Eastern Carpathians, Romania). The foraminiferal assemblages are dominated by agglutinated species with tubular forms (Psammosiphonella cylindrica, Nothia spp., Bathysiphon sp.), globular (Saccammina spp., Psammosphaera spp.), coiled (Recurvoides spp., Reticulophragmium spp.) and flattened streptospiral (Paratrochamminoides spp., Trochamminoides spp.). Coarsely agglutinated taxa are characteristic for the “flysch – type” agglutinated foraminiferal biofacies. The depositional setting was probably upper to middle bathyal, as suggested by the …

Dasycladalean Algae From Upper Jurassic–Lower Cretaceous Limestones Of Piatra Craiului Massif (South Carpathians, Romania) And Their Relationship To Paleoenvironment, Cristian Victor Mircescu, Ioan I. Bucur, Emanoil Săsăran

Studia UBB Geologia

The Mesozoic limestones of Piatra Craiului Massif were deposited in the Dâmbovicioara sedimentary area, at the eastermost part of the Getic carbonate platform. In order to study the microfacies and to provide a more detailed biostratigraphy, we sampled the carbonate succession from Piatra Craiului Massif along several sections. The identified microfacies point to reef slope, carbonate platform margin or restrictive, lagoon-type internal depositional environments. Some of the identified microfossils are biostratigraphic markers for the Tithonian-Lower Valanginian. The calcareous algae form associations typical for reef slopes and internal platforms. The latter can be subdivided into: (1) restrictive environments (low-energy subtidal-intertidal), dominated …

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 …

Sedimentology And Biostratigraphy Of The Early-Middle Miocene Transition In Nw Transylvanian Basin (Pâglişa And Dej Sections), Claudia Beldean, Răzvan Bercea, Sorin Filipescu

Studia UBB Geologia

The Early - Middle Miocene transition can be studied in several sections from the north-western Transylvanian Basin, across the boundary between the Hida and Dej Formations. The Pâglişa and Râpa Dracului (Dej locally outcrop) sections offer a very good record of the changes in the sedimentary facies and micropaleontological content across the boundary. The lower parts of the sections display the upper Hida Formation with prodelta fine grained sediments covered by coarser grained sediments related to a delta front progradation. Four sedimentary facies associations have been separated based on grain size and associated sedimentary structures. Micropaleontological assemblages are moderately to …

Facies Analysis And Sequence Stratigraphy Of The Asmari Formation In The Northern Area Of Dezful Embayment, South-West Iran, Fateme Zabihi Zoeram, Mohammad Vahidinia, Asadollah Mahboubi, Hasan Amiri Bakhtiar

Studia UBB Geologia

This paper concerns the sequence stratigraphy of the Oligocene (Rupelian–Chattian)–Early Miocene (Burdigalian) Asmari Formation based on microfacies analysis of the sediments in the Ghale Nar Oilfield, central area of Zagros fold-thrust belt. Fourteen facies types typical for upward shallowing trend from open marine (MF 1–3), to shoal (MF 4-5), semi-restricted and restricted lagoon (MF 6–12) and finally to near-shore lagoon (MF 13-14) depositional environments were identified. Based on the environmental interpretations, we reconstructed a homoclinal ramp mainly represented by its inner and middle sectors. Facies types MF 4–14 are characterized by the occurrence of large and small porcelaneous benthic foraminifera …

"Rosalina" Marginata Reuss 1845 (Foraminifera) And Its Taxonomic Position, Theodor Neagu

Studia UBB Geologia

The central idea of this article is the obligation of a micropaleontologist to respect without any doubt the rules and demands stipulated by the International Commission on Zoological Nomenclature (ICZN), in order to avoid taxonomical mistakes. An unusual example of confusion generated by disregard for the ICZN Code rules is the case of Rosalina marginata REUSS. The species Rosalina marginata REUSS, 1845 emend. REUSS, 1854 is here transferred to the genus Dicarinella. Other specimens illustrated as “Marginotruncana marginata” for example the “neotype” established by Jirova (1956) are placed in the new species Marginotruncana pseudomarginata nom. novum.

New Insights Into Troglotella Incrustans Wernli & Fookes, 1992, A Fascinating Upper Jurassic-Upper Cretaceous Foraminifer, Felix Schlagintweit

Studia UBB Geologia

New data about the highly variable test morphology of the benthic foraminifer Troglotella incrustans WERNLI & FOOKES (Oxfordian-Lower Cenomanian) are presented, permitting an emended species/genus diagnosis. This concerns mainly the existence of a large final chamber with fistulose extensions that may follow the uniserial or the irregular-branching test part. The way of life of T. incrustans (cryptoendolithic vs. euendolithic) is discussed against the background of different existing models in the literature. The study is based on material (thin-sections and provided photographs) mainly from the Upper Jurassic of Austria, Italy, Romania, Ukraine, and also the type-locality of France.

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 …

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 …

Agglutinated Foraminifera From The Northern Tarcău Nappe (Eastern Carpathians, Romania), Raluca Bindiu, Sorin Filipescu

Studia UBB Geologia

The Tarcău Nappe is the most important unit of the Carpathian flysch due to its size, stratigraphic, and tectonic complexity. Our purpose was to identify the major types of foraminifera assemblages in relation to the paleoenvironmental settings and their biostratigraphic potential. The identified assemblages are characteristic to the Cretaceous and Paleogene, consisting mostly of benthic agglutinated and, in lower proportions, benthic calcareous and planktonic species. Local abundances of Glomospira specimens allowed the correlation of the examined strata to the early Eocene “Glomospira event” described from the Carpathians in Poland, Morocco, and Labrador. Rzehakina fissistomata (Grzybowski) identified at Palma makes …

Geomathematical Characterisation Of The Mineralization Indicators: A Case Study From Tincova Magmatic Intrusion (Romania), George Tudor

Studia UBB Geologia

Indicators of the hydrothermal mineralization in the Tincova Laramian intrusion were tested at the contact zone between the intrusive body and the metamorphic host rocks. The mineralization consists of Cu, Pb and Zn sulfides, arsenopyrite, pyrrhotite and pyrite in gangue of quartz, carbonates, feldspar, sericite or clay minerals, and includes areas of hydrothermal alteration or oxidation. Seventy-nine samples were analyzed and processed as two distinct populations. Geomathematical methods highlight the importance of factors such as the shape, sizes of the mineralized zones and geological processes involved in the ore genesis. Trend maps for Cu, Pb + Zn, and Ag interpolated …

Morphological Specification Of Chinianella Scheympflugi Hofmann, 1994, A Late Jurassic (?Earliest Cretaceous) Dasycladalean Alga Of The Western Tethyan Domain, Felix Schlagintweit

Studia UBB Geologia

The dasycladalean alga Chinianella? scheympflugi was described by Hofmann (1994) from the Tithonian of the Ernstbrunn Limestone of Lower Austria. This alga, so far unreported besides its type-locality, is reported from the Late Jurassic of Poland, the Northern Calcareous Alps of Austria, Crimea (Ukraine), and Greece (Parnassos Zone). Facies are well-agitated outer platform habitats (peri-reefal and back-reefal facies). The cylindrical thallus consists of three parts: a sterile Salpingoporella-like basal part (stalk), a fertile Chinianella-type main portion and a short sterile top part. The transition from the stalk to the main thallus portion is well marked and abrupt. The stratigraphic range …

New Data On Facies Development And Micropaleontology Of The Eastern Margin Of The Getic Carbonate Platform (South Carpathians, Romania): Case Study Of Mateiaş Limestone, Ioan I. Bucur, Daniela Beles, Emanoil Sasaran, Constantin Balica

Studia UBB Geologia

Mateiaş Limestone represents a lithostratigraphic unit included in the Braşov Series, which is a component of the eastern end of the Getic Nappes’ cover (the Getic carbonate platform). The study of the Mateiaş Limestone in Hulei-Mateiaş-Măgura area has evidenced three main facies, and five microfacies types. The Kimmeridgian (possibly also Early Tithonian) age of the Mateiaş Limestone has been assigned based on a microfossil association identified in thin sections. The regional framework, as well as their sedimentological and micropaleontological features point to the deposition of these limestones on shelf margin and slope environments; the succession in the studied area corresponds …

Late Jurassic–Early Cretaceous Foraminifera From Štramberk-Type Limestones, Polish Outer Carpathians, Daria Ivanova, Boguslaw Kolodziej

Studia UBB Geologia

Foraminifera studies were carried out on the Štramberk-type limestones which occur as pebbles to small boulders (exotics) within the uppermost Jurassic–Palaeogene flysch deposits of the Polish Outer Carpathians. The studies were focused on foraminifera from (1) reef and peri-reef facies, and (2) lagoonal algal-foraminiferal facies. The paper deals with 34 species (including 8 in open nomenclature) representing 30 genera, 22 families, 14 superfamilies, 11 suborders, and 7 orders. A more precise age determination has been obtained for 30 exotics, representing a Tithonian (mostly) to Valanginian age. Foraminiferal assemblages from at least two exotics suggest a Valanginian age as indicated by …

Soil-Plant Relationship Of Pteropyrum Olivieri, A Serpentine Flora Of Wadh, Balochistan, Pakistan And Its Use In Mineral Prospecting, Shahid Naseem, Erum Bashir, Khaula Shireen, Sheraz Shafiq

Studia UBB Geologia

Biogeochemical investigation of Pteropyrum olivieri, a flora of Wadh area in perspective of plant-soil-rock relationship has been made. It is a native of Irano-Turanian region which extended into Saharo-Sindian region of Pakistan. The distribution of P. olivieri and some other co-ecological flora in relation to lithology was also discussed. Field observations showed its controlled population on the serpentine soil. The average abundance of Mg and Ca in soil was estimated as 2.43% and 5.46 respectively. The Mg/Ca ratio of the soils of the study area was below unity (0.445), indicating pedogenesis from serpentinite. Quantitative estimation of Cr, Ni, Co and …

Development And Usage Of Geosites: New Results From Research And Conservation Activities In The Piemonte Region (Italy), Luca Ghiraldi, Paola Coratza, Ermanno De Biaggi, Marco Giardino, Mauro Marchetti, Luigi Perotti

Studia UBB Geologia

This paper describes a series of activities carried out by public institutions, whose aim is to identify possible ways of acquiring knowledge and of allowing enjoyment of the Piemonte Region’s geological heritage. The activities concern the inventory, the evaluation, the storage and the publication of information, both alphanumerical and geographical, in relation to geosites. A database accessible directly from Web and a Web-GIS application has been developed in order to supply valuable and comprehensive instruments for both, representing the results of research and promoting the knowledge of the geological heritage to a large number of people.

Roşia Montană Cultural Heritage In The Context Of A New Mining Development, Adrian Gligor, Calin Tamas

Studia UBB Geologia

The Roşia Montană Project represents a responsible mining project in progress in the Apuseni Mountains, Romania. It is the first mining project developed in Romania according to up-to-date Romanian and international (EU) standards. Besides specific geological and mining aspects, the Project comprises various other aspects concerning the culture and the community. The present paper presents the cultural heritage of Roşia Montană in the framework of the new mining development proposed by Roşia Montană Gold Corporation.

Natural And Historic Heritage Of The Bochnia Salt Mine (South Poland), Janusz Wiewiorka, Krzysztof Dudek, Józef Charkot, Małgorzata Gonera

Studia UBB Geologia

The Bochnia Salt Mine, presented in this paper, is situated ca. 40 km E of Cracow, in the southern part of the Neogene Carpathian Foredeep, close to the Carpathian edge. In this region the rock-salt deposits formed as a result of the Late Miocene folding and local tectonic thickening of Badenian evaporites. The Bochnia deposit, situated in the almost vertical N limb of the Bochnia Anticline, stretches ca. 7 km WE, but only 15-200 m NS. Salt mining in Bochnia began in the thirteenth c. and continued until 1990. The historic part of the mine, since 1995 operated by a …

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.

Baia Mare Geological And Mining Park – A Potential New Geopark In The Northwestern Part Of Romania, Marinel Kovacs, Alexandrina Fülöp

Studia UBB Geologia

The Baia Mare region is a very well known mining area, with an excellently studied regional geology in Romania. The geological heritage has been strongly incorporated in the economic and social development of the region which is now subject to the cease of the mining-based activities. The natural heritage, as well as the historical and cultural values of the region, will contribute substantially to the future development. The region of Baia Mare has a high potential for founding a new Geopark in the Gutâi Mts. volcanic area. The main geological, mining/archaeological/historical, ecological and cultural issues of the Baia Mare region …

Geochemical Sediments & Landscape; Cave Geology; Karst Hydrogeology And Geomorphology, Bogdan P. Onac

Studia UBB Geologia

No abstract provided.

Scărişoara. The Realm Of Scărişoara, Robert Brinkmann

Studia UBB Geologia

No abstract provided.

Mammut Borsoni (Hays 1834) From The Early Pliocene Of Husnicioara (Mehedinţi District, Romania), Vlad Codrea, Florina Diaconu

Studia UBB Geologia

A mastodon tooth has been found at Husnicioara coal open pit, in Mehedinţi district (southwestern Romania). It originates from the Lower Pliocene (Dacian) gravel and sand deposits lying just above the coal bed IV, mined in this quarry. The tooth exposing zygodont features undoubtedly belongs to Mammut borsoni (“Borson’s mastodont”). Although this species is very common in the Pliocene vertebrate faunas from this part of Europe, until now it was missing from the Lower Pliocene (Dacian) assemblage’s lists in our country.

On The Cretaceous Occurrences Of Ammogloborotalia Zheng, 2001 (Foraminifera), Michael A. Kaminski, Claudia Cetean, Andrew Henderson, Sorin Filipescu

Studia UBB Geologia

Three species of agglutinated foraminifera from Cretaceous deep-water deposits that have been described as trochamminids are here transferred to the genus Ammogloborotalia ZHENG, 2001. These species are Trochammina abrupta GEROCH, 1959; Trochammina quinqueloba GEROCH, 1959, and Ammoanita globorotaliaeformis Gradstein and Kaminski, 1999. A fourth species, Ammogloborotalia sp.1, which is probably a new species from the Turonian of the southern East Carpathians of Romania is reported here for the first time. We hereby extend the known stratigraphic range of the genus Ammogloborotalia to the Late Jurassic (Tithonian).