GEOLOGIA ROMANIEI PDF

Institutul Geologic al României reprezintă una dintre cele mai vechi instituţii centrale create de statul român modern. Toate foile hărţilor geologice şi hidrogeologice ale României editate până în prezent sunt stocate Muzeul de Geologie. V. MUTIHAC Iuliana Maria STRATULAT Roxana Magdalena FECHET GEOLOGIA ROMÂNIEI BUCUREŞTI 1 ÎNCADRAREA. Din anul când a avut loc Congresul Internațional de Geologie din Bologna s-a hotărât Harta este editată de către Institutul Geologic al României.

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Ars Docendi, Bucharest 5.

Rom J Tecton Reg Geol. Late Cretaceous exhumation of the Bihor Unit Time—temperature paths, fission-track modelling Kounov and Schmidand the deposition of syn- to post-tectonic sediments on all but the lowest tectonic units in the nappe stack allow constraining general uplift of the study area during Late Cretaceous times Fig.

The thin section shows a mylonitic fabric and ductile NE-directed shearing of quartz bands. Phyllonites and metagranites are the dominant lithologies, but amphibolites and lenses of calcitic and dolomitic marbles, often associated with quartzites, characterize the retrogressed portions of pre-Mesozoic basement.

Biotite ages were calculated using the Rb-decay constant of 1.

Abbreviations of mineral names are according to Whitney and Evans a Discordant age spectrum. Legaturi paleobiogeografice ale faunei de vertebrate continentale Maastrichtian superioare din Bazinul Hateg. Furthermore, concordant Ar—Ar hornblende ca. The thin section shows an anastomising muscovite foliation romanisi around zoned garnet minerals up to 1.

Intense folding during the subsequent D2 phase is responsible for varying strike-slip bnormal fault cand thrust geometries d of the D1-phase. In general, the Rb—Sr biotite data set yields younger ages than corresponding Ar—Ar muscovite ages Fig. Polyphase overprinting of pre-Alpine basement units and a significant thermal overprint during the Alpine evolution led to a complex structure with strong lateral and vertical gradients.

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Neagu, Th, Dragastan, O. Rom J Petrol This phase of shortening is geodynamically linked to gellogia N- to NE-directed subduction of the Neotethys Vardar ocean beneath Europe-derived units romanoei.

Geologia României – V. Mutihac, Liviu Ionesi – Google Books

Time—temperature paths from the structurally highest basement nappe of the Apuseni Mountains in combination with sedimentary data indicate exhumation and a position close to the surface after the Late Jurassic emplacement of the South Apuseni Ophiolites. Insula dinosaurilor – Noi interpretari ale vertebratelor cretacice din Bazinul Hateg dupa ani de la descoperire Csiki, Z.

The lack of stratigraphic control and a strong retrogressive overprint during the following tectonic phases complicate constraining Early Cretaceous deformation in the Tisza Mega-Unit.

Tectonic implications of paleomagnetic research into Upper Cretaceous magmatic rocks in the Apuseni Mountains, Romania. Latest Cretaceous deformation Our kinematic observations show top-W-directed deformation under brittle conditions Fig. Late Cretaceous intra-oceanic magmatism in the internal Dinarides northern Bosnia and Herzegovina: Mineral exploration and sustainable development, pp — Nicolae I, Saccani E. Time—temperature paths of the Bihor Unit show cooling from medium- to low-grade thermal conditions at the transition between Early and Late Cretaceous Fig.

Mutihac, Gabriel

Geeologia biotite ages calculated with feldspar sample MR11 or whole-rock isotope composition all other samples. Shear bands in the Biharia Nappe s. Kinematic data from the Bihor Unit in the northern part of the study area sector C in Figs. However, due to the lack of index minerals, no constraint for thermal peak conditions in the Biharia Nappe s. Earth Planet Sci Lett. Eastern European Alpine system and the Carpathian orocline as an example of collision tectonics.

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Numar Special The Transylvanian Basin Romania and its relation to the Carpathian fold and thrust belt: Differences in timing of cooling between the tectonic units relate to their structural position in the nappe stack.

Balen D Microstructural, geothermobarometric and geochronological constraints on the complex Alpine collisional history recorded on the romamiei Psunj Complex metamorphic rocks of the Slavonian Mts.

Polonica, 48, 4, Late Cretaceous extension led to the formation of half-grabens and associated hanging-wall deposition of rimaniei to post-tectonic sediments in the Apuseni Mountains and the South Carpathians e.

Symposia Organizing Comittee member 1. Lithostratigraphic correlation of Precambrian in the Romanian Carpathians. New Ar—Ar muscovite and Rb—Sr biotite age data in combination with structural analyses from the Apuseni Mountains provide feologia constraints on the timing and kinematics of deformation during the Cretaceous.

Peer reviewed, ISI periodicals 1. Provinciality of the Mediterranean Lower Jurassic brachiopod fauna: However, where no sedimentary information is available, it is difficult to distinguish structures associated with Late Cretaceous half-graben formation from younger extensional structures associated with the opening of the Transylvanian Basin during the Neogene Schuller Chem Geol Isot Geosci Sect.

This exhumation takes place along low-angle detachments and exposes structurally lower parts of the basement units.

GEOLOGIA ROMANIEI PDF

Institutul Geologic al României reprezintă una dintre cele mai vechi instituţii centrale create de statul român modern. Toate foile hărţilor geologice şi hidrogeologice ale României editate până în prezent sunt stocate Muzeul de Geologie. V. MUTIHAC Iuliana Maria STRATULAT Roxana Magdalena FECHET GEOLOGIA ROMÂNIEI BUCUREŞTI 1 ÎNCADRAREA. Din anul când a avut loc Congresul Internațional de Geologie din Bologna s-a hotărât Harta este editată de către Institutul Geologic al României.

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NE—SW-trending stretching lineation and associated kinematic indicators of this deformation phase D1 are overprinted by top-NW-directed thrusting during D2. Penetratively sheared chlorite—phyllonites, variably phyllonitized amphibolites and granitoid rocks, discontinuous lenses of sericite—chlorite—schists, quartzites, and variably dolomitic marbles Mesozoic cover?

Capital letters A, B, C illustrate the relative structural position of the sectors used in Figs.

The crenulation cleavage is discrete in the mica-rich layers and less developed in the more quartz-rich layers. Shear bands in the Biharia Nappe s.

New and previously published data sets are integrated into time—temperature paths Fig. The Apuseni Mountains mainly comprise pre-Variscan, polyphase metamorphic crystalline basement, Palaeozoic granitoid intrusions, Upper Palaeozoic cover, Jurassic ophiolites, and Mesozoic sequences of variable thickness e. Palaeoenvironmental interpretation of dinosaur- and mammal-bearing continental Maastrichtian deposits, Hateg basin, Romania.

Paleo-ecological significance of the continental gastropod assemblages from the Maastrichtian dinosaur beds of the Hateg Basin. A new giant pterosaur with a robust skull from the latest Cretaceous of Romania. Alpine regional metamorphism in the main tectonic units of Hungary: From the Middle Jurassic onwards, both units were separated from Europe due to the westward propagating opening of the Piemont-Ligurian ocean.

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Geological Quarterly, 49, 2, — Electronic supplementary material Below is the link to the electronic supplementary material. Through the integration of structural and thermochronological data, new and published data sets, and local and regional constraints, our study aims to provide a new model for the tectonic evolution of the Apuseni Mountains. Professional society membership 1.

Overview on Romanian Geology. Since the Codru Unit in the study area only experienced low-grade metamorphic overprint during the Alpine evolution, we suggest lateral, orogen-parallel translation to explain its present-day position. National Center for Biotechnology InformationU. Evaluation of the 87 87 Rb decay constant by age comparison against the U—Pb system.

Time—temperature paths, fission-track modelling Kounov and Schmidand the deposition of syn- to post-tectonic sediments on all but the lowest tectonic units in the nappe stack allow constraining general uplift of the study area during Late Cretaceous times Fig.

Thus, in the following section, we correlate sedimentary, structural, and thermochronological data to constrain the Alpine tectonothermal evolution of the tectonic units in the study area Fig. Chloritized biotites indicate retrogressive overprinting.

Calculation of ages was done using Isoplot software Version 4. The thin section shows an anastomising muscovite foliation bending around zoned garnet minerals up to 1. Problems of the European continental margin in the Transylvanian-Pannonian area. Early Cretaceous, syn-tectonic sediments which unconformably overlie the Vidolm Nappe and the South Apuseni Ophiolites constrain a position close to the surface during the Early Cretaceous Figs.

Since shear bands indicate kinematics at the ductile—brittle transition, E-directed movement under cooler conditions than during the retrogressive overprint D2 can be inferred.

From nappe stacking to exhumation: Cretaceous tectonics in the Apuseni Mountains (Romania)

All four Ar—Ar muscovite age spectra show a staircase pattern Fig. Shaping mobile belts by small-scale convection. Polonica, 45, 1, Ages given on the plot represent plateau spectra.

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Anuarul Institutului de Geologie si Geofizica.

It was assumed that Alpine metamorphism of the Tisza Mega-Unit was only of retrogressive nature. The rotation of garnet—porphyroclasts indicates top-NE-directed deformation.

Geologia României – V. Mutihac, Liviu Ionesi – Google Books

Martin Kaspar Reiser, Phone: East Srednogorie-Balkan rift zone. Late Cretaceous exhumation of the metamorphic Gleinalm dome, Eastern Alps: The thin section of sample MR11 Fig. Acta Palaeontologica Romaniae, 5, Complex pattern of polyphase folding can be observed in several outcrops. However, rojaniei strike-slip, thrust and normal fault geometries share a general, top-NE direction.

European Association of Vertebrate Paleontologists; 3. Data are corrected for blanks, interfering nucleogenic reactions and decay of 37 Ar and 39 Ar.

The main foliation consists of non-retrogressed biotite and muscovite and shows only little deformation. The intense chloritization of biotites from the Biharia Nappe s. The Neojurassic and the Cretaceous of the Drocea Mts: The samples were measured with an Argus GV Instruments multicollector mass spectrometer, equipped with four high-gain 10 12 Ohms Faraday collectors for the analysis of 39 Ar38 Ar37 Arand 36 Aras well as a single Faraday collector 10 11 Ohms for the analysis of 40 Ar.

With the exception of the Biharia Nappe s.