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Table of contents
1.U UINTRODUCTIONU
U2.U UGEOLOGICAL SETTING OF THE VELENCE MOUNTAINSU
U2.1U UREGIONAL GEOLOGYU
U2.2U UMAJOR GEOLOGICAL FORMATIONS OF THE VELENCE MOUNTAINSU
U2.2.1U UVariscan granite (Velence Granite Formation)U
U2.2.2U UEarly Palaeozoic Slate (Lovas Slate Formation)U
U2.2.3U UCretaceous igneous rocks (Budakeszi Picrite Formation)U
U2.2.4U UPalaeogene igneous rocks (Nadap Andesite Formation)U
U2.3U UGENERAL GEOLOGY OF THE SZABADBATTYÁN AREAU
U2.4U UHYDROTHERMAL SYSTEMS IN THE VELENCE MTS.U
U2.4.1U UMineralization of the granite and the shaleU
U2.4.2U UHydrothermal processes related to the igneous activity of the Palaeogene ageU
U2.4.3U UHydrothermal mineralization of Palaeogene age in the Variscan graniteU
U2.5U UHYDROTHERMAL MINERALIZATION OF THE SZABADBATTYÁN AREAU
U3.U UTHEORETICAL BACKGROUND AND APPLIED METHODSU
U3.1U UFLUID INCLUSION PLANESU
U3.2U UFLUID INCLUSION STUDIES: PRINCIPLES AND METHODSU
U3.3U UMETHODS OF ANALYSIS OF HYDROTHERMAL VEIN NETWORKS, JOINTS, FRACTURESU .
U3.4U UFRACTAL ANALYSIS OF HYDROTHERMAL VEINSU
U3.5U UCLAY MINERAL STUDIES: SAMPLE PREPARATION, METHODOLOGYU
U3.6U URADIACTIVE AND STABLE ISOTOPE STUDIESU
U4.U URESULTSU
U4.1U UDELINEATION AND CHARACTERIZATION OF SUPERIMPOSING HYDROTHERMAL PROCESSES
ON THE BASIS OF CLAY MINERALOGY IN THE ARGILLIC ALTERATION ZONES OF THE VELENCE GRANITEU
U4.1.1U UThe aim of the clay mineral studies and previous studiesU
U4.1.2U UArgillic alteration in and around the andesite dikes of Palaeogene age and
hydrothermal breccias hosted by the granite around the quartz-barite hydrothermal veinsU
U4.1.3U UArgillic alteration around the quartz-fluorite-base metal veins and regional argillic alteration of graniteU
U4.1.4U UTemperature conditionsduring the formation of the clay mineral assemblagesU
U4.2U UAGE, ORIGIN AND TEMPERATURE OF HYDROTHERMAL FLUID FLOW EVENTS IN THE VELENCE MTS.U
UK-Ar analysesU
U4.2.1U UK-Ar analysesU
U4.2.1.1U UK-Ar ages for rock forming mineralsU
U4.2.1.2U UK-Ar ages measured on hydrothermal mineralsU
U4.2.1.3U UInterpretation of K-Ar radiometric age data from the aspect of the extent of superimposing hydrothermal events that affected the granite intrusionU
U4.2.2U UPb isotope studies: age and genetical relationships of the quartz-fluorite-base metal veins and their geotectonical connectionsU
U4.2.3U USulphur isotope analysis: temperature estimation for the formation of the quartzfluorite- base metal veinsU
U4.3U UFLUID INCLUSION STUDIESU
U4.3.1U UType I FIA: Carbonic-aqueous fluid inclusion assemblages trapped from an inhomogeneous fluid (Photoplate 1/A.)U
U4.3.2U UType II and Type III FIA: Aqueous fluid inclusion assemblages trapped from homogeneous parent fluidU
U4.3.3U UType IV FIA: Aqueous fluid inclusion assemblages, trapped from inhomogeneous fluidU
U4.3.4U UInterpretation of the fluid inclusion analysisU
U4.3.5U UProving vertical movements in the granite by means of fluid inclusion studiesU
U4.4U UANALYSIS OF THE STRUCTURAL ELEMENTS OF THE GRANITE AND THE ANDESITE DIKESU
U4.4.1U UThe Székesfehérvár areaU
U4.4.2U UPákozd areaU
U4.4.3U UThe Nadap-Sukoró areaU
U4.4.4U UThe Nadap areaU
U4.4.5U UPalaeogene Volcanic UnitU
U4.4.6U URelatinships between FIP orientations, fluid inclusion petrography and microthermometryU
U4.5U USTATISTICAL ANALYSIS OF PALAEOGENE HYDROTHERMAL VEIN ARRAYS: FRACTAL ANALYSIS AND PERMEABILITY CALCULATIONU
U4.5.1U UFractal analysisU
U4.5.2U UPermeabilities calculated from the geometrical data of the veinsU
U4.6U UFIP STATISTICAL PARAMETERS: AVERAGE LENGTH, LENGTH DENSITY, NUMBER DENSITYU
U4.6.1U UIso-Fracture density map of the Nadap area and comparison of statistical parametersU
U5.U UDISCUSSIONU
U5.1U UVARISCAN TECTONISM AND ITS CONSEQUENCES ON THE FORMATION OF THE INITIAL FRACTURE SYSTEM OF THE GRANITEU
U5.2U UREGIONAL TRIASSIC FLUID FLOW IN THE GRANITE: GENETIC MODEL AND STRUCTURAL CONTROLU
U5.2.1U URadiometric age constraintsU
U5.2.2U UModel for the Triassic fluid mobilization processes in the Velence Mts.U
U5.2.3U UGeotectonical considerationsU
U5.2.4U UStructural control of the Triassic fluid flow: uplift of the granite and its effect on the fracture evolution on the graniteU
U5.3U UEVOLUTION OF THE FRACTURE SYSTEM OF THE GRANITE RELATED TO THE PALAEOGENE MAGMATIC-HYDROTHERMAL PROCESSESU
U5.3.1U UReopening of FIP in the illitic Palaeogene alteration zones and thermal propagation of the fracture networkU
U5.3.2U UFracture formation and evolution: thermal reopening versus mechanical fracture formationU
U5.4U UPOST-PALAEOGENE STRUCTURAL EVENTSU
U5.5U USTATISTICAL ANALYSIS OF THE FRACTURE SYSTEMS AT DIFFERENT SCALES: PRACTICAL
APPLICABILITYU
U6.U USUMMARYU
U7.U UACKNOWLEDGEMENTU
U8.U UREFERENCESU
