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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An ongoing controversy eomaniei the early Alpine tectonic evolution, the palaeogeographic situation, and tectonic position of the South Apuseni Ophiolites and flysch nappes e. Late Cretaceous exhumation of the metamorphic Gleinalm dome, Eastern Alps: Mesozoic plate tectonic reconstruction of the Carpathian region. Experimental temperatures increase from left to right. Together with petrographical and microstructural analyses Fig. The study area is marked by a black frame.
Timing of rotational motion of Apuseni Mountains Romania —paleomagnetic data from Tertiary magmatic rocks. Peer reviewed, ISI periodicals 1. Age plateaus were determined using the criteria of Dalrymple and Geoligiaand data reduction utilized ArArCalc Koppers Early Cretaceous Deformation 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.
Equal-area, lower-hemisphere stereographic plots of stretching lineation and contoured pi-plots of main foliation, separated according to the sectors given in Figs. Both samples show ductile deformation and retrogressive overprint and thus could provide arguments for a tectonic influence on these ages.
Thermal, chronological and isotopic constraints.
This age range is also shown in detrital zircons population 3: Acta Palaeontologica Romaniae, 6, Field data include measurements of foliation, stretching lineation, kinematic indicators, and fold geometries which are shown on the map in Fig. Both mega-units experienced a significant change in fossil assemblage during the Bathonian, which indicates that they had come under the influence of the Adriatic palaeobiogeographic realm e. Our kinematic observations show top-W-directed deformation under brittle conditions Fig.
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. Geological Society of Romania; 5.
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Thus, we interpret this D1 deformation phase in the study area as an interference between the neighbouring position of the Tisza and Dacia Mega-Units cf. Brittle detachment faulting D3. European Association of Vertebrate Paleontologists; 3.
Mineral exploration and sustainable development, pp — Nicolae I, Saccani E. Highschool Diploma, Mathematics and Physics Highschool no. Gheorghe, Covasna County, Romania; – New Ar—Ar muscovite and Rb—Sr biotite age data in combination with structural analyses from the Apuseni Mountains provide new constraints on the timing and kinematics of deformation during the Cretaceous.
Heinrich CA, Neubauer F. The lineation trends sub-parallel to the NE—SW-trending fold axis of isoclinal folds and its axial plane foliation.
Top-NW-directed thrusting is responsible for the present-day nappe stack and associated with a more or less pervasive retrograde greenschist-facies overprint of the tectonic units in the study area during Early—Late Cretaceous times.
A new giant pterosaur with a robust skull from the latest Cretaceous of Romania. Phase equilibrium, geothermobarometric and xenotime age dating constraints on the Alpine metamorphism recorded in chloritoid schists from the southern part of the Tisia Mega-Unit Slavonian Mts. Rom J Tecton Reg Geol. Revista de Politica Stiintei si Scientometrie. Tributes to the career of Dan Grigorescu, Ed.
Int J Earth Sci. Geological background 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.
Thermochronological data indicate rapid cooling of all tectonic units in the study area during Early—Late Cretaceous times Fig. Small theropods of the Late Cretaceous of the Hateg Basin Western Romania — an unexpected diversity at the top of the food chain. However, the combination with other thermochronological data Ar—Ar muscovite and zircon fission-track data and only little deformation observed in the thin section Fig.
Martin Kaspar Reiser, Phone: Earth Planet Sci Lett. In these parts, biotite and garnet are well preserved e. Rapid Late—Early Cretaceous cooling in the eastern periphery of the Bihor Unit is associated with E-directed tectonic unroofing in lower structural levels of the Apuseni Mountains.
Data are corrected for blanks, interfering nucleogenic reactions and decay of 37 Ar and 39 Ar. Penetratively sheared chlorite—phyllonites, variably phyllonitized amphibolites and granitoid rocks, discontinuous lenses of sericite—chlorite—schists, quartzites, and variably dolomitic marbles Mesozoic cover? The data are baseline-corrected, and error calculations include the errors on mass discrimination measurement and the J value.
Overview over the structures attributed to the deformation phases D3 and D4. The structural data set exhibits complex deformation along E—W- to NE—SW-trending, sinistral transpressive shear zones between the Tisza and Dacia Mega-Units, which precedes penetrative top-NW thrusting in the study area.
Weathered surfaces were removed from the sample material before starting the separation procedure. Tectonic, magmatic, and metallogenic evolution geloogia the Late Cretaceous arc in geologa Carpathian—Balkan orogen.
The chloritization of biotite and garnet minerals indicates retrogressive overprint sample MR15, Fig.