22 research outputs found
TriĂĄsz Ă©s jura lejtĆfĂĄciesek jelentĆsĂ©ge a Neotethys ĂNy-i vĂ©gĂ©nek geodinamikai Ă©rtelmezĂ©sĂ©ben = Importance of Triassic and Jurassic slope facies in the geodynamic reconstruction of the NW termination of the Neotethys
A program cĂ©lja az Ă©szak-magyarorszĂĄgi triĂĄsz Ă©s jura medence- Ă©s lejtĆfĂĄciesek szedimentolĂłgiai Ă©s rĂ©tegtani vizsgĂĄlata volt Ășj fejlĆdĂ©störtĂ©neti szintĂ©zis kidolgozĂĄsa Ă©rdekĂ©ben, Ă©s azĂ©rt, hogy lehetĆvĂ© vĂĄljon a korrelĂĄciĂł a DinaridĂĄk Ă©s a HellenidĂĄk hasonlĂł korĂș Ă©s kifejlĆdĂ©sƱ kĂ©pzĆdmĂ©nyeivel. A kutatĂĄsokat a BĂŒkkben, a darnĂłi terĂŒleten, a MĂĄtrĂĄban mĂ©lyĂtett fĂșrĂĄsok anyagĂĄn Ă©s a RudabĂĄnyai-hegysĂ©gben vĂ©geztĂŒk. Az összehasonlĂtĂł elemzĂ©s Ă©rdekĂ©ben terepi megfigyelĂ©seket Ă©s vizsgĂĄlatokat vĂ©geztĂŒnk a DinaridĂĄkban, a HellenidĂĄkban, a Keleti- Alpokban Ă©s a Nyugati-KĂĄrpĂĄtokban. A Neotethys akkrĂ©ciĂłs komplexumĂĄnak rĂ©szĂ©t kĂ©pezĆ bĂŒkki, tovĂĄbbĂĄ a MĂĄtra aljzatĂĄt alkotĂł Ă©s a DarnĂł környĂ©ki kĂ©pzĆdmĂ©nyek alapvetĆ jellegei jĂłl megfeleltethetĆk a DinaridĂĄkban ismertekkel, Ă©s ennĂ©l fogva kĂ©pzĆdĂ©si körĂŒlmĂ©nyeik is levezethetĆek a DinaridĂĄkra a közelmĂșltban kidolgozott modellekbĆl. A RudabĂĄnyai-hegysĂ©gben megismert olisztosztrĂłmĂĄk törmelĂ©kanyaga mutat ugyan összetĂ©telbeli eltĂ©rĂ©seket a bĂŒkkiekhez Ă©s a mĂĄtraiakhoz kĂ©pest, de fontos összekapcsolĂł bĂ©lyegeket is felismertĂŒnk. Az Ăszaki MĂ©szkĆalpokban megfigyelt szubdukciĂłhoz köthetĆ jelensĂ©gek szedimentolĂłgiai jellege Ă©s idĆbeli lefolyĂĄsa jĂł korrelĂĄciĂłt mutat a BĂŒkkben megismerthez, de a medencĂ©kben felhalmozĂłdott törmelĂ©kben lĂ©nyeges eltĂ©rĂ©sek vannak. Ez az akkrĂ©ciĂłs komplexum törmelĂ©kanyagĂĄnak zömĂ©t szolgĂĄltatĂł felsĆ, kontinentĂĄlis lemez felĂ©pĂtĂ©sĂ©nek kĂŒlönbsĂ©gĂ©re vezethetĆ vissza. Az eredmĂ©nyek alĂĄtĂĄmasztjĂĄk a bĂŒkki, a mĂĄtrai-darnĂłi Ă©s a rudabĂĄnyai mezozoos összleteknek a DinaridĂĄkhoz kapcsolĂłdĂł eredeti helyzetĂ©t. | Study of sedimentological and stratigraphical characteristics of the Triassic and Jurassic basin and slope facies in North Hungary was the aim of the project. Elaboration of a new geodynamic synthesis and correlation with the coeval and genetically similar formations of the Dinarides and Hellenides were also in the focus of the project. The studies were performed in the BĂŒkk Mts., in the DarnĂł area, on cores drilled in the MĂĄtra Mts., and in the RudabĂĄnya Hills. For comparative analyses field studies were carried out in the Dinarides, Hellenides, in the Eastern Alps and Western Carpathians. Basic characteristics of the relics of the Neotethys accretionary complexes occur in the BĂŒkk, in the basement of the MĂĄtra and also in the DarnĂł area show good correspondence with those in the Dinarides and therefore their genetic conditions can be derived from the recently elaborated genetic models for the Dinarides. Although differences were pointed out in the composition of olistostromes encountered in the RudabĂĄnya Hills, and that in the BĂŒkk and MĂĄtra Mts., significant common features were also recognised. Sedimentological characteristics and timing of the subduction-related phenomena observed in the Northern Calcareous Alps can also be correlated with those in the BĂŒkk, but there are substantial differences in the composition of the clasts. This can be explained by the differences in the upper continental plate, source of dominant part of the clasts of the accretionary complex. The results support the concept on the Dinaridic relationship of the Mesozoic complexes of the BĂŒkk, MĂĄtra-DarnĂł and RudabĂĄnya Hills
Az ĂK-magyarorszĂĄgi paleozoikum Ă©s mezozoikum dinĂĄri-hellenid korrelĂĄciĂłja = Dinaridic-Hellenidic correlation of the Paleozoic and Mesozoic of NE Hungary
ElkĂ©szĂŒltek A Cirkum-Pannon rĂ©giĂł tektonosztratigrĂĄfiai tĂ©rkĂ©peinek magyarĂĄzĂł fejezetei, amelyek a XVIII. KĂĄrpĂĄt-BalkĂĄn GeolĂłgiai Kongresszuson (BelgrĂĄd, 2006) lettek bemutatva. ElkĂ©szĂŒlt a DarnĂłi komplexum Ă©s a Recsk-mĂ©lyszint ĂșjraĂ©rtĂ©kelĂ©se Ă©s tĂ©rkĂ©pe, valamint elĆzetes korrelĂĄciĂł a BelsĆ-DinaridĂĄk Ă©s BelsĆ-HellenidĂĄk irĂĄnyĂĄban, szerb Ă©s görög egyĂŒttmƱködĂ©sben; utĂłbbiban Ășj tektonikai modellek vetĆdtek fel a BĂŒkk-hegysĂ©gben. JelentĆsen elĆre haladt a RudabĂĄnyai-hegysĂ©g közĂ©psĆ rĂ©szĂ©nek szerkezeti Ă©s jĂșra megismerĂ©se, elkĂ©szĂŒlt a nem metamorf aggtelek-rudabĂĄnyai egysĂ©gek szerkezeti kersztszelvĂ©nye az orszĂĄghatĂĄrtĂłl SzalonnĂĄig. | Explanatory chapters of the Circum-Pannonian tectonostratigraphic terrane map series have been prepared for printing; they were presented at the XVIIIth Carpato-Balkan Geological Congress (Belgrade, 2006). The DarnĂł Complex and the pre-Tertiary basement of the Recsk Paleogene ore-field have been revised, the new geological map of the DarnĂł area have been prepared. Preliminary correlation with the Inner Hellenides - Inner Dinarides has been made and in Greek cooperation a partly new tectonic model was elaborated for the BĂŒkk Mts. Knowledge on the structure and Jurassic stratigraphy oh the middle part of the RudabĂĄnya Mts. has been significantly increased. Structural cross-section of the non-metamorphosed units of Aggtelek-RudabĂĄnya Mts. (from the state border to the SE margin) has been prepared for printing
Stratigraphy, facies and geodynamic settings of Jurassic formations in the BĂŒkk Mountains, North Hungary: its relations with the other areas of the Neotethyan realm.
Jurassic mélange complexes related to the subduction of the Neotethys Ocean occur
in the BĂŒkk Mountains, North Hungary. This paper characterizes the sedimentary sequence of
basin and slope facies that occur in the southwestern part of the BĂŒkk Mountains, placing special
emphasis on the redeposited sedimentary rocks (olistostromes, olistoliths: Mónosbél Group) in order
to obtain information on the provenance of the clasts, and the mode and time of their redeposition.
The series of formations studied shows a general coarsening-upwards trend. Based on radiolarians
and foraminifera, the Mónosbél Group formed in Early to Late Bathonian time. The lower part
of the complex is typified by a predominance of pelagic carbonates, shale and radiolarite with
andesitic volcaniclastic intercalations. The higher part of the succession is characterized by polymictic
olistostromes. Large olistoliths that are predominantly blocks of Bathonian shallow marine limestone
(BĂŒkkzsĂ©rc Limestone) appear in the upper part of the sequence. Based on the biostratigraphic and
sedimentological data, results of analyses of the redeposited clasts and taking into consideration
the concepts of the development of the western Neotethys domain, the evolutionary stages of the
sedimentary basins were defined. The onset of the compressional stage led to initiation of nappe
stacking that led to the formation of polymict olistostromes and then to the redeposition of large
blocks derived from out-of-sequence nappes of the former platform foreland