13 research outputs found
Diagenesis and reservoir quality of Pannonian lacustrine deposits in the MakĂł Trough, SE Hungary
Erdélyi gótikus és korabarokk oltårok topografikus felmérése (15-17. szåzad) = Topographic survey of the gothic and early baroque transilvanian altars (15th-17th century)
KutatĂĄsunk elsĆdleges cĂ©lja az erdĂ©lyi kĂ©sĆgĂłtikus, reneszĂĄnsz Ă©s kora barokk oltĂĄrok topografikus felmĂ©rĂ©se volt, valamint az emlĂ©kek adattĂĄrĂĄnak elkĂ©szĂtĂ©se. Ennek megfelelĆen az elkĂ©szĂŒlt katalĂłgus elsĆ rĂ©sze összefoglalja a reformĂĄciĂł elĆtti idĆszak teljes, jelenleg ismert szĂĄrnyasoltĂĄr, faszobor Ă©s tĂĄblakĂ©p ĂĄllomĂĄnyĂĄt, helyszĂni kutatĂĄsok alapjĂĄn frissĂtve, gyakran mĂłdosĂtva, Ășj tĂ©telekkel, adatokkal kiegĂ©szĂtve az eddig ismerteket. SzĂĄmos esetben sikerĂŒlt azonosĂtani az egyes ĂĄbrĂĄzolĂĄsok konkrĂ©t metszetelĆkĂ©peit is. A katalĂłgus mĂĄsodik rĂ©szĂ©t 17. szĂĄzadi oltĂĄrok alkotjĂĄk. Mivel a 17. szĂĄzadi erdĂ©lyi oltĂĄrmƱvĂ©szet kevĂ©ssĂ© kutatott terĂŒlet, itt szĂĄmos olyan emlĂ©k kerĂŒlt be az adattĂĄrba, amely korĂĄbban ismeretlen volt a szakma szĂĄmĂĄra. Ennek ellenĂ©re igyekeztĂŒnk a lehetĆ legteljesebb mĂ©rtĂ©kben feltĂ©rkĂ©pezni ezeket az oltĂĄrokat, a katalĂłgusban pedig az emlĂ©kekrĆl tudhatĂł összes adatot rögzĂtettĂŒk. Az összeĂĄllĂtott nyilvĂĄntartĂĄs kiindulĂłpontul szolgĂĄlhat tovĂĄbbi mƱvĂ©szettörtĂ©neti elemzĂ©sek szĂĄmĂĄra, jelentĆs eredmĂ©nyeket hozhat egy olyan terĂŒleten, amelynek kutatĂĄsĂĄval rĂ©gĂłta adĂłs a mƱvĂ©szettörtĂ©net. A katalĂłgus összeĂĄllĂtĂĄsa sorĂĄn mĂĄris alapvetĆ, korĂĄbban ismeretlen összefĂŒggĂ©sek körvonalazĂłdtak. Ezek egy rĂ©sze az elmĂșlt Ă©vekben közlĂ©sre kerĂŒlt, tovĂĄbbi tĂ©makörök feldolgozĂĄs alatt ĂĄllnak. A pĂĄlyĂĄzatban eredetileg vĂĄllalt katalĂłgus összeĂĄllĂtĂĄsa azonban maradĂ©ktalanul teljesĂŒlt. | Primary aim of our research was to compile a complete catalogue, based on a topographic inventory of Transylvanian winged altarpieces, dating from the late Gothic, Renaissance and early Baroque period. Thus, the first part of the catalogue contains the full number of altarpieces, wooden-sculptures and panel paintings nowadays known from the period preceding the Reformation, increasing the number of previously known pieces, modifying and completing in several cases the information known on them so far. It was also possible to identify the graphical pattern used in the compositions of several representations. The second part of the catalogue contains the altarpieces dating from the 17th century. As this topic is a much neglected one in art history, a large number of previously unknown pieces have been catalogued on this occasion. We have done our best in inventorying the complete number of these altarpieces, while the catalogue contains all the data known on the entries. The compiled database will serve as starting point for further research and will most probably bring new results in the research of a topic much ignored in art history. While working on the catalogue in point, new art historical connections were already contoured, a number of which have been published during the years of this research, while another part is being presently worked up. The compilation of the catalogue originally undertaken in the project has been entirely fulfilled
Multiphase carbonate cementation in the Miocene PĂ©tervĂĄsĂĄra Sandstone (North Hungary): implications for basinal fluid flow and burial history
The paper focuses on the reservoir heterogeneity of a sandstone formation in which the main issue is the evaluation of diagenetic features. Integrated data from field observations as well as petrographic and geochemical analyses from surface and core sections from different structural settings were applied. In the shallow marine PĂ©tervĂĄsĂĄra Sandstone, eogenetic minerals are comprised of calcite, pyrite and siderite; mesogenetic minerals are albite, ankerite, calcite, quartz, mixed layer clays and kaolinite. Dissolution occurred during mesogenetic and telogenetic phases. Ankerite is only present in the core setting, where the sandstone is at ca. 900 m depth and diagenetic calcite predates quartz cementation. Based on stable isotopic values (ÎŽ13 CV-PDB â18.3 to â11.4 â° and ÎŽ18 OV-PDB â9.5 to â7.2 â°), diagenetic calcite is of mesogenetic origin and was precipitated from fluids migrated along fault zones from the underlying, organic matter-rich formation. In outcrop setting, on the other hand, calcite is present in a larger quantity and postdates quartz cementation. Carbon isotope data (ÎŽ13 CV-PDB = â9.9 to â5.1 â°) indicate less contribution of light isotope, whereas more negative oxygen isotopic values (OV-PDB = â13.1 to â9.9 â°) likely imply higher temperature of mesogenetic fluids. However, carbonâoxygen isotope covariation can indicate precipitation from meteoric fluid. In this case, further analyses are required to delineate the final model
A kora-miocĂ©n PĂ©tervĂĄsĂĄrai HomokkĆ diagenezis-törtĂ©nete
Az eggenburgi korĂș, sekĂ©lytengeri környezetben kĂ©pzĆdött PĂ©tervĂĄsĂĄrai HomokkĆ FormĂĄciĂłt, mint ismert rezervoĂĄr kĆzet felszĂni analĂłgjĂĄt vizsgĂĄltuk. A szemcseösszetĂ©tel, a diagenezistörtĂ©net Ă©s a porozitĂĄsfejlĆdĂ©s rekonstrukciĂłjĂĄhoz
terepi vizsgĂĄlatokat Ă©s petrogrĂĄfiai megfigyelĂ©seket vĂ©geztĂŒnk, melyeket geokĂ©miai mĂ©rĂ©sek egĂ©szĂtettek ki. A vizsgĂĄlt, aprĂł-durvaszemcsĂ©s, kĆzettörmelĂ©kes homokkĆben a komponensek mennyisĂ©gi arĂĄnya alapjĂĄn nĂ©gy litofĂĄcies kĂŒlön - böztethetĆ meg; ezek a porĂłzus (LF1), mĂĄtrixgazdag (LF2), cementgazdag (LF3), Ă©s mĂĄtrix- Ă©s cementgazdag (LF4)
homokkĆtĂpusok. A diagenezis sorĂĄn, az eogenezis tartomĂĄnyĂĄban kĂ©pzĆdött autigĂ©n ĂĄsvĂĄnyok a glaukonit, a fram - boidĂĄlis pirit, sziderit, kĂĄliföldpĂĄt tovĂĄbbnövekedĂ©si cement, kaolinit Ă©s a feltĂ©telezhetĆen nagyon kis mennyisĂ©gƱ kalcit - cement. A legalĂĄbb 80 °C-os hĆmĂ©rsĂ©kletet elĂ©rve, a mezogenezis tartomĂĄnyĂĄban megjelent a kvarc tovĂĄbb növekedĂ©si cement, kevert szerkezetƱ illit/szmektit Ă©s albit keletkezett. Ăgy a fokozatosan betemetĆdött homokkĆben a porozitĂĄs folyamatosan csökkent a kompakciĂł Ă©s a megjelenĆ Ășj ĂĄsvĂĄnyfĂĄzisok miatt. A legnagyobb mennyisĂ©gben megjelenĆ,egyik legkĂ©sĆbbi autigĂ©n ĂĄsvĂĄnyfĂĄzis a kalcit. Ez fĆleg ĂĄsvĂĄnyhelyettesĂtĂ©skĂ©nt, kisebb rĂ©szben pedig cementkĂ©nt,elszigetelt lencsĂ©kben van jelen. A rendelkezĂ©sre ĂĄllĂł geokĂ©miai adatok alapjĂĄn, figyelembe vĂ©ve a terĂŒlet földtani felĂ©pĂtĂ©sĂ©t, a kalcit eredete több genetikai modellel is magyarĂĄzhatĂł. Ezek szerint kĂ©pzĆdhetett egyrĂ©szt a mezogenezis tartomĂĄnyĂĄban, az ĂŒledĂ©kkel betemetĆdött mĂłdosult tengeri eredetƱ pĂłrusfluidumbĂłl, mĂĄsrĂ©szt keletkezhetett törĂ©sek mentĂ©n a kĆzettestbe ĂĄramlott egzotikus fluidumbĂłl. Ez utĂłbbi esetben is kĂ©t vĂĄltozat lehetsĂ©ges, vagy egy magas hĆmĂ©rsĂ©kletƱ formĂĄciĂłs fluidumbĂłl vĂĄlt ki, vagy egy mĂ©lyre cirkulĂĄlt Ă©s felmelegedett meteorikus eredetƱ fluidumbĂłl. A homokkĆ jelentĆs porozitĂĄssal rendelkezik, fĆleg a kalcitot nem tartalmazĂł rĂ©szeken. Ez a porozitĂĄs a kiemelkedĂ©s sorĂĄn, a felszĂn közelĂ©ben alakulhatott ki a beszivĂĄrgĂł meteorikus vizek oldĂł hatĂĄsa rĂ©vĂ©n. A feltĂĄrĂĄsban megjelenĆ
kĂŒlönleges mĂĄllĂĄsi formĂĄk kialakulĂĄsĂĄban a homokkĆ diagenezistörtĂ©netĂ©nek jelentĆs szerepe volt.
For this paper, the Eggenburgian PĂ©tervĂĄsĂĄra Sandstone â a shallow marine siliciclastic formation â was studied as a surface analogue for known reservoir rocks. Field observation in the area of KishartyĂĄn, detailed petrography (including SEM, CL) and geochemical analysis (XRD, SEM-EDS, stable isotope analysis) were applied to find out more about the diagenetic processes, the burial history, the porosity evolution, and their relationship with the weathering forms. The composition of the fine to very coarse-grained sandstones varies between subarenite and litharenite. The most common detrital grains are mono- and polycrystalline quartz and sedimentary rock fragments (cherts, dolomites and metamorphic rock fragments). Ductile grains are represented by micas and altered volcanoclastic rock fragments. Based on the proportion of components, four lithofacies were distinguished: porous sandstone (LF1), matrix-rich sandstone (LF2),cement-rich sandstone (LF3), and matrix and cement rich sandstone (LF4). The eogenetic minerals are: glauconite,framboidal pyrite, flattened rhombohedral siderite crystals, K-feldspar overgrowth cement, kaolinite, and (supposedly)small amounts of calcite. The maximum burial temperature was likely reached at around 80 °C; this is indicated by the presence of quartz overgrowth cement, mixed layer illite/smectite, and replacive and cementing albite. These minerals were formed in the mesogenetic realm. During eogenesis and mesogenesis, the porosity of the sandstone progressively decreased due to compaction and the precipitation of authigenic minerals. Calcite is one of the latest diagenetic minerals and occurs both as a replacive phase and as cement. The distribution of calcite within the studied sandstone is heterogeneous. Calcite is present in elongated lenses where the sandstone has a very low porosity. Considering the geochemical data and the geological setting, the origin of the calcite can be explained by several genetic models. According to these models, the formation of the calcite may have taken place either in the mesogenetic realm from modified marine pore waters (buried together with the sediment), or from an exotic fluid channelled along fault zones. In the second scenario, there are two possibilities regarding the origin of the parent fluid: namely, (a) a formational fluid or
(b) a deeply circulated, warmed-up meteoric fluid. The high porosity of the sandstone is the result of dissolution by
meteoric water during uplift. Diagenetic evolution of the sandstone had a crucial role in the formation of the weathering
morphology
Dolomitization of shallow-water, mixed silicilastic-carbonate sequences: The Lower Triassic ramp succession of the Transdanubian Range, Hungary
The Lower Triassic succession of the Transdanubian Range in Hungary comprises limestones, dolomite, marl, sandstones and siltstones, deposited in tidal flat, lagoon and ooid shoal environments on the marginal ramp of the western Neotethys. Seven cores were chosen for petrographic and stable isotope investigations aiming to reconstruct the paragenetic sequence with special regard to the dolomitization and hydrothermal events. Five lithotypes were differentiated: (i) dolomite, (ii) sandy, silty, clayey dolomite, and dolomarl, (iii), dolomitic siltstone and sandstone, (iv) dolomitic limestone, and (v) limestone. In these lithotypes, three types of dolomites are present: non-ferroan replacive, ferroan replacive, and ferroan cement. Fabric retentive and fabric destructive non-ferroan replacive dolomitization are interpreted to have occurred by seepage reflux. Supporting evidence includes the presence gypsum and anhydrite in the Lower Triassic beds. Stable isotope values of the ferroan
dolomite (ÎŽ18O of â10.7 to â4.2â° and ÎŽ13C of â4.8 to 4.7â°) suggest dolomitization by fluids of relatively high temperature. The similar stable isotope values (ÎŽ18O of â9.3 to â5.8â° and ÎŽ13C of â1.9 to 2.5â°) of the non-ferroan dolomite phase suggest that the reflux dolomite was overprinted by this second dolomitization event. Traces of exotic minerals, such as barite, chalcopyrite, galena and sulphosalts were found as fillings of vugs and fractures in the dolomite-cemented sandstone. The metals could have been sourced from the underlying Permian red sandstone beds. The heterogeneous sediment composition had profound impact on the diagenesis of these sedimentary successions
A pĂ©tervĂĄsĂĄrai homokkĆ diagenezis szempontĂș petrogrĂĄfiai vizsgĂĄlata a kishartyĂĄni feltĂĄrĂĄsban
Az eggenburgi korĂș PĂ©tervĂĄsĂĄrai HomokkĆ FormĂĄciĂł egy sekĂ©lytengeri sziliciklasztos kĂ©pzĆdmĂ©ny, amely Ăszak-MagyarorszĂĄgon jelentĆs terĂŒleten jelenik meg a felszĂnen. DiplomamunkĂĄm sorĂĄn a kĂ©pzĆdmĂ©nyt, mint lehetsĂ©ges rezervoĂĄr kĆzet felszĂni analĂłgiĂĄjĂĄt vizsgĂĄltam, a KishartyĂĄn mellett talĂĄlhatĂł âKĆlyukoldalâ nevƱ feltĂĄrĂĄsban. A rĂ©szletes terepi Ă©s petrogrĂĄfiai (CL, SEM) megfigyelĂ©sek geokĂ©miai vizsgĂĄlatokkal (XRD, EDS, stabil izotĂłp) vizsgĂĄlatok egĂ©szĂŒltek ki. Ezek segĂtsĂ©gĂ©vel sikerĂŒlt meghatĂĄrozni a homokkĆ törmelĂ©kes összetĂ©telĂ©t, rekonstruĂĄlni a diagenezis törtĂ©netĂ©t, valamit a porozitĂĄs vĂĄltozĂĄsĂĄt ennek folyamĂĄn. Emellett kĂ©pet kaptunk a feltĂĄrĂĄsban megjelenĆ kĂŒlönleges mĂĄllĂĄsi formĂĄk Ă©s diagenezis összefĂŒggĂ©sirĆl is. A dolgozat tartalmaz egy mĂłdszertani rĂ©szt, melyben diagenezis vizsgĂĄlatok sorĂĄn ĂĄltalĂĄnosan hasznĂĄlt pontszĂĄmolĂĄs mechanikus Ă©s szoftveres mĂłdszerĂ©t hasonlĂtottam össze a vizsgĂĄlt mintĂĄkon.
A vizsgĂĄlt mintĂĄk aprĂł- durvaszemcsĂ©s homokkövek, az ĂŒledĂ©kszerkezetek ĂĄltalĂĄban nehezen ismerhetĆek fel a felszĂni mĂĄllĂĄs miatt. A kĆzettörmelĂ©kes homokkövek leggyakoribb vĂĄzalkotĂł szemcsĂ©i a mono- Ă©s polikristĂĄlyos kvarc, az ĂŒledĂ©kes kĆzettörmelĂ©k-szemcsĂ©ket kĂ©pviselĆ tƱzkĆ Ă©s dolomit, illetve a metamorf kĆzettörmelĂ©k-szemcsĂ©k. A kĂ©plĂ©keny szemcsĂ©ket a csillĂĄmok Ă©s mĂĄllott vulkĂĄni eredetƱ kĆzettörmelĂ©k-szemcsĂ©k kĂ©pviselik. A mĂĄtrix eloszlĂĄsa Ă©s megjelenĂ©si formĂĄi vĂĄltozatosak. A kĂ©pzĆdmĂ©nyben szabad szemmel Ă©s mikroszkĂłpos pontszĂĄmolĂĄs segĂtsĂ©gĂ©vel litofĂĄciesek kĂŒlönĂthetĆek el, melyek a törmelĂ©kes Ă©s diagenetikus komponenseik alapjĂĄn kĂŒlönböznek egymĂĄstĂłl. Ezek a következĆk: 1) porĂłzus homokkĆ (LF1), mĂĄtrix-gazdag homokkĆ (LF2), 3) cement-gazdag homokkĆ (LF3) Ă©s 4) mĂĄtrix- Ă©s cement tartalmĂș homokkĆ (LF4).
A homokkĆben az eogenezis zĂłnĂĄjĂĄban megjelenĆ legkorĂĄbbi autigĂ©n ĂĄsvĂĄnyok a dolomit szemcsĂ©k körĂ© növĆ sziderit, a framboidĂĄlis pirit Ă©s a kis mennyisĂ©gƱ, ĂĄltalĂĄban bioklasztok vĂĄzkitöltĆ ĂŒledĂ©kĂ©bĆl kĂ©pzĆdĆ glaukonit voltak. MegjelenĂ©sĂŒk reduktĂv környezetet jelez, a sekĂ©ly eltemetĆdĂ©s zĂłnĂĄjĂĄban. A fokozatos eltemetĆdĂ©s sorĂĄn a
mezogenezis zĂłnĂĄjĂĄban a kĂ©pzĆdmĂ©ny legalĂĄbb 80oC-os hĆmĂ©rsĂ©klet tartomĂĄnyba kerĂŒlt, a megjelenĆ kvarc tovĂĄbbnövekedĂ©si cement tanĂșsĂĄga szerint. EgyĂ©b mezogenetikus ĂĄsvĂĄnyok a kevert szerkezetƱ illit/szmektit, az ĂĄsvĂĄnyhelyettesĂtĆ albit Ă©s feltĂ©telezhetĆen a kaolinit egy rĂ©sze. Az eogenezis Ă©s a mezogenezis tartomĂĄnyĂĄban a kĂ©pzĆdmĂ©ny porozitĂĄsa folyamatosan csökkent, amiben nagyobb rĂ©szt a kompakciĂłnak, kisebb rĂ©szt a megjelenĆ Ășj ĂĄsvĂĄnyfĂĄzisoknak volt szerepe.
A homokkĆben legnagyobb mennyisĂ©gben megjelenĆ, egyik legkĂ©sĆbbi ĂĄsvĂĄnyfĂĄzis a kalcit, amely javarĂ©szt ĂĄsvĂĄnyhelyettesĂtĂ©skĂ©nt, kisebb rĂ©szben pedig cementkĂ©nt van jelen. A jelen pillanatban rendelkezĂ©sre ĂĄllĂł geokĂ©miai informĂĄciĂłk birtokĂĄban, a terĂŒlet földtani felĂ©pĂtĂ©sĂ©nek figyelembe vĂ©telĂ©vel nem dönthetĆ el egyĂ©rtelmƱen, hogy egy mĂłdosult meteorikus eredetƱ, vagy egy formĂĄciĂłs fluidumbĂłl vĂĄlt ki. Elszigetelt foltokban, lencsĂ©kben jelenik meg, ezeken a terĂŒleteken a kĂ©pzĆdmĂ©ny porozitĂĄsa minimĂĄlis. ValĂłszĂnƱleg telogenetikus eredetƱek a viszonylag nagy mennyisĂ©gben megjelenĆ kaolinit Ă©s a kis mennyisĂ©gƱ kĂĄliföldpĂĄt tovĂĄbbnövekedĂ©si cement.
A kĂ©pzĆdmĂ©ny jelenleg jelentĆs porozitĂĄssal rendelkezik, fĆleg a kalcit cementet nem tartalmazĂł rĂ©szeken, ez a porozitĂĄs a kiemelkedĂ©s sorĂĄn a felszĂn közelĂ©ben alakulhatott ki. A diagenezistörtĂ©net utolsĂł fĂĄzisĂĄban a felszĂnrĆl beszivĂĄrgĂł meteorikus fluidumok jelentĆs mĂ©rtĂ©kƱ oldĂłdĂĄshoz vezettek, mely kihangsĂșlyozta a cementĂĄciĂłs kĂŒlönbsĂ©geket. Ennek köszönhetĆen jöttek lĂ©tre a feltĂĄrĂĄsban lĂĄtott mĂĄllĂĄsi formĂĄk
Kalcit cementĂĄciĂł vizsgĂĄlata homokkĆben (kĂŒlönös tekintettel a kora-miocĂ©n, sekĂ©lytengeri PĂ©tervĂĄsĂĄrai HomokkĆ FormĂĄciĂłra)
Multiphase carbonate cementation in the Miocene PĂ©tervĂĄsĂĄra Sandstone (North Hungary): implications for basinal fluid flow and burial history
The paper focuses on the reservoir heterogeneity of a sandstone formation in which the main issue is the evaluation of diagenetic features. Integrated data from field observations as well as petrographic and geochemical analyses from surface and core sections from different structural settings were applied. In the shallow marine PĂ©tervĂĄsĂĄra Sandstone, eogenetic minerals are comprised of calcite, pyrite and siderite; mesogenetic minerals are albite, ankerite, calcite, quartz, mixed layer clays and kaolinite. Dissolution occurred during mesogenetic and telogenetic phases. Ankerite is only present in the core setting, where the sandstone is at ca. 900 m depth and diagenetic calcite predates quartz cementation. Based on stable isotopic values (ÎŽ13 CV-PDB â18.3 to â11.4 â° and ÎŽ18 OV-PDB â9.5 to â7.2 â°), diagenetic calcite is of mesogenetic origin and was precipitated from fluids migrated along fault zones from the underlying, organic matter-rich formation. In outcrop setting, on the other hand, calcite is present in a larger quantity and postdates quartz cementation. Carbon isotope data (ÎŽ13 CV-PDBâ=ââ9.9 to â5.1 â°) indicate less contribution of light isotope, whereas more negative oxygen isotopic values (OV-PDBâ=ââ13.1 to â9.9 â°) likely imply higher temperature of mesogenetic fluids.However, carbonâoxygen isotope covariation can indicate precipitation from meteoric fluid. In this case, further analyses are required to delineate the final model
Territorial differences of climate change impact on Romanian crop production
Effects of the climate change appear in several fields of the economy and agriculture can be considered as one of the most affected among them. In a country, where almost 10% of the total GDP is produced by the agricultural sector and more than 30% of the total work force is employed in this field, these changes may have severe economic impacts. As in Romania almost 65% of the agricultural production is represented by vegetal production, we concentrate our investigations on this agricultural sector. Our aim is to present, basing on econometric modeling, how the climate changes will affect the Romanian crop production in the next 20 years, highlighting the territorial differences which appear between the Romanian NUTS2 development regions. This paper presents some of the first results of the FP6 research project âCLAVIER â Climate Change and Variability: Impact on Central and Eastern Europeâ, contract no. 037013 (2006-2009)