Note: Page Numbers in Italic Refer to Illustrations, Those in Bold Type Refer to Tables

Total Page:16

File Type:pdf, Size:1020Kb

Note: Page Numbers in Italic Refer to Illustrations, Those in Bold Type Refer to Tables Index Note: Page numbers in italic refer to illustrations, those in bold type refer to tables. Aachen-Midi Thrust 202, 203, 233, 235 Armorican affinities 132, 283 Acadian Armorican Massif 27, 29, 148, 390 basement 36 Armorican Terrane Assemblage 10, 13, 22 Orogeny 25 drift model 27-28 accommodation cycles 257, 265 magmatic rocks 75 accommodation space 265, 277 palaeolatitudes 28 acritarchs, Malopolska Massif 93 in Rheno-Hercynian Belt 42 advection, as heat source 378, 388 separation from Avalonia 49 African-European collision 22 tectonic m61ange 39 Air complex, palaeomagnetism 23, 25 Tepl/t-Barrandian Unit 44 Albersweiler Orthogneiss 40 terminology 132 Albtal Granite 48 Terrane Collage 132 alkali basalts 158 Ashgill, glacial deposits 28, 132, 133 allochthonous units, Rheno-Hercynian Belt 38 asthenosphere, upwelling 355, 376, 377 Alps asthenospheric source, metabasites 165 collisional orogeny 370 Attendorn-Elspe Syncline 241 see also Proto-Alps augen-gneiss 68 alteration, mineralogical 159 Avalon Terrane 87 Amazonian Craton 120, 122, 123, 147 Avalonia American Antarctic Ridge 167, 168, 170 and Amazonian Craton 120 Amorphognathus tvaerensis Zone 6 brachiopods 98 amphibolite facies metamorphism 41, 43, 67, 70 and Bronovistulian 110 Brunovistulian 106 collision with Armorica 298 Desnfi dome 179 collision with Baltica 52 MGCR 223 drift model 27 Saxo-Thuringia 283, 206 extent of 10 amphibolites, Bohemian Massif 156, 158 faunas 94 anatectic gneiss 45, 389 Gondwana derivation 22 anchimetamorphic facies 324 palaeolatitude 27 Anglo-Brabant Massif 233, 234, 236 passive margin 296 ANSYS program 218, 220, 357 separation from Armorican 49 Antarctica, flood basalts 170 southern margin 79 Variscan 52 Appalachian, Acadian Orogeny 25 and West African Craton 120 Appalachian Brachiopod Realm 13, 14 Avalonian Cadomian chain 108 aquifer systems, and heat transfer 250 Avalonian-Cadomian Orogenic Belt 131,132 Arabian-Nubian Shield 122 axial depth Aranograptus murrai 135 and enrichment factors 169 Aratrosporites saharaensis Microflora 16 metabasites 168 arc volcanism, Cadomian 13 Azores plume 167 arc-continent collision 213 Ardennes anticlines 202 back-arc basins, passive rifting 156, 192, 348 basement 36 back-arc spreading foreland 200 Brunovistulian 108, 109 volcanics 12 and lower crust heating 366 Arenig-Llanvirn boundary 5, 6 Rhenish Massif 49 Argentina, Precordilleran Terrane 5 Saxo-Thuringia 149 argon ages, Erzgebirge 323 336 Vosges Basin 442 argon diffusion rates 331 backthrusting 317 argon isotopic record 331-332 Baden Baden Belt 48 argon losses 332, 333 Badenweiler-Lenzkirch belt 48, 433, 442 argon spectra, Erzgebirge 326, 327 Baltic shield 39 argon storage 333-334 Baltica Armorica basement 96 crustal fragments 132 and Bohemia 122 rifting 110 drift models 27 Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/3860213/9781862394278_backmatter.pdf by guest on 02 October 2021 446 INDEX extent of 9-10 heat sources 376-378 faunas 94 metabasites 155 174 Tornquist margin 88 metamorphic grades 157 trilobites 22, 94 Nd isotopic data 113-129 Baltica-Avalonia, southern margin 29 origin 122 Baltica-Gondwana suture 87-102 plutonism 158-- 159 Banda Arc 199 pre-Variscan ages 52 Bardo Basin 70-71 rifting 43 B/irentiegel Porphyroid 147 samples and ages 180-189 B~irhalde Granite 48 subduction-collision model 379 Barrandian Basin 133 terrane map 76 Barrovian zones Bohemian Shear Zone 390 Bohemian Massif 175, 189 Bohemian Terrane 52, 71, 75, 79, 338, 349 Rhenish Massif 212 Bohemicum 72 basal accretion 204, 212 Boppard Thrust 202, 203, 208 basal detachment Bothriolepis 14 Rhenish Massif 206 boudinage, large-scale 51, 52, 193 Saxo-Thuringia 290, 298 Bouguer anomalies 310 basaltic andesites 409, 410, 411 Bouvet plume 167, 170 basement cover relations 200 Brabant Massif, marine transgression 36 basin asymmetry brachiopods Rheno-Hercynian Basin 267 Arenig 5 Saar-Nahe Basin 245 Armorican terrane 28 basin closure, and slab break-off 393 distribution 13, 14 basin filling 257, 259, 263 phosphatic 94 basin geometry, turbidite basins 270 Branchian age 5 basin modelling 207, 236, 242, 252 Brannfi unit 184 Basin and Range Province 387 Bray Fault 272 basin width, Saxo-Thuringia 288 British North Atlantic Province 163 Bavarian Forest 45, 47 Brittany 147, 148 benthic organisms 10 microcontinent 12 Berbersdorf Granite 344 brittle domain 219 Berga Anticline 135, 284, 286, 287, 293 brittle failure 360 Bielawy-Trzebnica 72 brittle-plastic transition 200, 206, 209, 237 Bilfi Fault 75 Brno Batholith 97, 104, 106, 179 biogeography Brno Massif 104 Carboniferous 15-17 Brotterode Formation 290 Devonian 14-15 Brunia Microcontinent 114, 122, 123 East European Platform 94-95 Brunia plate Ordovician and Silurian t3-14 Cambro-Ordovician event 190 biotite dehydration melting 375, 376 underthrusting 189 biotite granodiorite 418, 423 Brunian domain 175, 184 Biteg Gneiss 46 Bruno-Silesia 94, 97, 99 Bittesch Gneiss 104, 180 Brunovistulian Block 103-112 bivalves, non-marine 16 geological map 105 Black Forest, see Schwarzwald metamorphism 106 107 Blambach Valley 134, 147 tectonic model 107-110, 108 Blansky Les 46 zircon ages 106 block rotation 132 Brunovistulicum 94, 114, 175 blueschist metamorphism 66, 68 Bukowa Quarry 97 Bochum Beds 243 Bunte Serie 45 Bohemia burial history microcontinent 12, 27, 29 Late Devonian 249 separation of 13 Rhenish Massif 238, 239, 245, 246 Bohemian Arc 78 Buschandlwand Amphibolite 45 Bohemian Margin 42 Bugin Fault 73 Bohemian Massif Armorican 110 Barrovian zones 175 Cadomian basement 120-123 arc volcanism 13 chronology 175-197 Avalonia 10 crustal blocks 157 back-arc basin 136, 148 Elbe Fault Zone 73 basement 27, 41, 66, 72, 94, 109 geological map 64, 176, 371 crust 185 Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/3860213/9781862394278_backmatter.pdf by guest on 02 October 2021 INDEX 447 deformation event 22 continental collision zones 217-230 magmatic arcs 76 continental crust Orogeny 43, 145 mass balance 410 paragneisses 36 multi-element diagram 422 radiometric ages 28 Continental Deep Drilling 42 rifting 166 continental lithosphere, and rifting 169 stratigraphy 109 continents subduction 43, 75 early Carboniferous 16 unconformity 133 early Devonian 13 calc-alkali magmatism late Carboniferous 17 Bohemian Massif 156, 170, 192 late Devonian 15 Saxo-Thuringia 283 convergent plate boundary 223 subduction zone melting 391 cooling ages, Erzgebirge 326-328 Caledonian corals, Ktodzko 70 basement 36 Cracow Fault 93, 94 detrital micas 52 crenulation cleavage, Schwarzburg Anticline 286 foreland 201 Cretan Arc 199 quartz arenites 38 crust Caledonian orogenic event 29 felsic 402, 41 l Caledonides, Scandinavian 97 formation age 118 CaIloxylon 15 crust-mantle coupling 220 Cambrian, stage boundaries 5 crustal balancing 318 Caradoc Series, base of 6 crustal blocks carbonate facies, Laurentia 9 Bohemian Massif 157 Carboniferous, base of 7 Sudetes Mountains 156-157 Carboniferous Limestone Platform 38 crustal contamination 156, 163-164, 168 cataclasites 202, 206 crustal evolution cataclastic flow 211 Rhenish Massif 237 Catalan terrane 28, 29 Variscan orogeny 409 Ce/Yb ratios 159, 162 crustal extension Ce/Zr ratios 163 Rhenish Massif 233 Central Basic Belt, Brunovistulian 106, 107, 109 Saxo-Thuringia 284 Central Bohemian Batholith 44, 46, 47, 74, 377 crustal flow, lower crust 355-368, 356 Central Europe, structural map 88 crustal growth, mantle magmatism 408 409 Cervenohorsk6 sedlo Belt 114, 120, 183-184 chaotic assemblages, G6rlitz 68 crustal imbrication 328 China Margin 199 crustal melting 109, 395 chlorite thennometry 295 crustal models 411 Clanschwitz Group 133, 135, 140 crustal profile, Erzgebirge 328 clastic sediments, Rheno-Hercynian Belt 36, 37 crustal recycling 119 coalfields crustal residence time paralic 16 (~ervenohorsk6 sedlo belt 184 Ruhr Basin 234 Desnfi dome 180, 182 coalification 237, 240, 241,243, 252 Keprnik nappe 184 collision geometry 209 Lugian Domain 119 collision zones, asymmetry 218 Silesian Domain 120 collisional deformation, orthogonal component 50-51 Stronie 189 collisional orogeny crustal rocks, high-level 156 Alps 370 crustal shortening, Saxo-Thuringia 287, 288, 290 Saxo-Thuringian Zone 281-302 crustal stacking 324, 329, 347 compatible element ratios 419 crustal structure, Rhenish Massif 237 conglomerates crustal temperature 219 Permian 64 and deformation 220 Vosges 48 crustal thickening conodonts distribution 51 Arenig 5 model 220, 224 East European Platform 94, 95 and radiogenic heat 298, 355, 356, 388, 394, 396 Gnathodus Zones 341 crustal thickness, Rhenish Massif 250 Kaczawa 68 crustal thinning, Cambro-Ordovician 190, 192 Prioniodus variabilis Subzone 6 crustal velocities 304 contact metamorphism 106, 372 Crux Thrust 284, 287, 289, 290, 296, 298 contamination trends 165 cumulates, ultramafic 70 continental accretion 199 cyclic propagation 212 continental collision, models 218, 221 cyclic sedimentation, turbidites 265, 266, 267 Downloaded from http://pubs.geoscienceworld.org/books/book/chapter-pdf/3860213/9781862394278_backmatter.pdf by guest on 02 October 2021 448 INDEX D. deflexus Zone 5 Orlica-Snie2nik Dome 67, 114 dacite 180, 189 Saxo-Thuringia 349 dating methods 5 Schwarzwald 48 deep seismic profiles 222 Velk6 Vrbno 189 see also DEKORP Eger Graben 76, 346, 347 deformation, and crustal temperature 220 Eggenburg 104 deformation partitioning 298 Eibenstock Granite 310 DEKORP sections 204, 211,225, 229, 243, 262, Eifel Anticline 241 287-290, 298, 304 Eifel Basin 233, 236, 237 delamination 377, 393-394,
Recommended publications
  • Geological Model of Western Bohemia in Relation to the Deep Borehole Ktb in Germany
    Bohemian Massif 74 MAEGS–10 Session 4 GEOLOGICAL MODEL OF WESTERN BOHEMIA IN RELATION TO THE DEEP BOREHOLE KTB IN GERMANY S. VRÁNA, V. ŠTĚDRÁ Czech Geological Survey, Klárov 3, 118 21 Prague 1, Czech Republic The project “Geological model of western Bohemia in relation to the deep borehole KTB in the FRG” was co- ordinated by the Czech Geological Survey in 1991–1994. A special volume of the Journal of Geological Sciences, series Geology (published by the Czech Geological Survey, Prague) presents the results of the project in 21 chapters on specialized topics, prepared by 50 co-authors from several geoscience institutions in the Czech Republic. The volume should appear approximately at the time of MAEGS-10 or later in 1997. Insights into the structure and evolution of the Earth's crust in the western Bohemian Massif and formulation of a new geological and geophysical model of the region were the common denominator of all the specialized studies of the project. It used, in addition to new data, geological and geophysical information amassed over several decades. Some regions not covered by the previous programs of geophysical survey, namely a belt along the state border in the W and SW Bohemia, were studied. Geophysical methods provided information on the region studied and on physical properties of the Earth's crust. These methods included regional gravimetry, airborne magnetometry and radiometry, and a 220 km long 9HR seismic profile. Gravimetry, and partly also magnetometry, gave quantitative information on subsurface extension of many contrasting plutons, intrusions, and horizons of basic metavolcanic rocks, necessary for a 3-D structural study of the Earth's crust.
    [Show full text]
  • Trans-Lithospheric Diapirism Explains the Presence of Ultra-High Pressure
    ARTICLE https://doi.org/10.1038/s43247-021-00122-w OPEN Trans-lithospheric diapirism explains the presence of ultra-high pressure rocks in the European Variscides ✉ Petra Maierová1 , Karel Schulmann1,2, Pavla Štípská1,2, Taras Gerya 3 & Ondrej Lexa 4 The classical concept of collisional orogens suggests that mountain belts form as a crustal wedge between the downgoing and overriding plates. However, this orogenic style is not compatible with the presence of (ultra-)high pressure crustal and mantle rocks far from the plate interface in the Bohemian Massif of Central Europe. Here we use a comparison between geological observations and thermo-mechanical numerical models to explain their formation. 1234567890():,; We suggest that continental crust was first deeply subducted, then flowed laterally under- neath the lithosphere and eventually rose in the form of large partially molten trans- lithospheric diapirs. We further show that trans-lithospheric diapirism produces a specific rock association of (ultra-)high pressure crustal and mantle rocks and ultra-potassic magmas that alternates with the less metamorphosed rocks of the upper plate. Similar rock asso- ciations have been described in other convergent zones, both modern and ancient. We speculate that trans-lithospheric diapirism could be a common process. 1 Center for Lithospheric Research, Czech Geological Survey, Prague 1, Czech Republic. 2 EOST, Institute de Physique de Globe, Université de Strasbourg, Strasbourg, France. 3 Institute of Geophysics, Department of Earth Science, ETH-Zurich,
    [Show full text]
  • The Environmental Mining Limits in the North Bohemian Lignite Region
    The environmental mining limits in the North Bohemian Lignite Region …need to be preserved permanently and the remaining settlements, landscape and population protected against further devastation or Let’s recreate a landscape of homes from a landscape of mines Ing. arch. Martin Říha, Ing. Jaroslav Stoklasa, CSc. Ing. Marie Lafarová Ing. Ivan Dejmal RNDr. Jan Marek, CSc. Petr Pakosta Ing. Arch. Karel Beránek 1 Photo (original version) © Ibra Ibrahimovič Development and implementation of the original version: Typoexpedice, Karel Čapek Originally published by Společnost pro krajinu, Kamenická 45, Prague 7 in 2005 Updated and expanded by Karel Beránek in 2011 2 3 Černice Jezeři Chateau Arboretum Area of 3 million m3 landslides in June 2005 Czechoslovak Army Mine 4 5 INTRODUCTION Martin Říha Jaroslav Stoklasa, Marie Lafarová, Jan Marek, Petr Pakosta The Czechoslovak Communist Party and government strategies of the 1950s and 60s emphasised the development of heavy industry and energy, dependent almost exclusively on brown coal. The largest deposits of coal are located in the basins of the foothills of the Ore Mountains, at Sokolov, Chomutov, Most and Teplice. These areas were developed exclusively on the basis of coal mining at the expense of other economic activities, the natural environment, the existing built environment, social structures and public health. Everything had to make way for coal mining as coal was considered the “life blood of industry”. Mining executives, mining projection auxiliary operations, and especially Communist party functionaries were rewarded for ever increasing the quantities of coal mined and the excavation and relocation of as much overburden as possible. When I began in 1979 as an officer of government of the regional Regional National Committee (KNV) for North Bohemia in Ústí nad Labem, the craze for coal was in full swing, as villages, one after another, were swallowed up.
    [Show full text]
  • Figure 3A. Major Geologic Formations in West Virginia. Allegheney And
    82° 81° 80° 79° 78° EXPLANATION West Virginia county boundaries A West Virginia Geology by map unit Quaternary Modern Reservoirs Qal Alluvium Permian or Pennsylvanian Period LTP d Dunkard Group LTP c Conemaugh Group LTP m Monongahela Group 0 25 50 MILES LTP a Allegheny Formation PENNSYLVANIA LTP pv Pottsville Group 0 25 50 KILOMETERS LTP k Kanawha Formation 40° LTP nr New River Formation LTP p Pocahontas Formation Mississippian Period Mmc Mauch Chunk Group Mbp Bluestone and Princeton Formations Ce Obrr Omc Mh Hinton Formation Obps Dmn Bluefield Formation Dbh Otbr Mbf MARYLAND LTP pv Osp Mg Greenbrier Group Smc Axis of Obs Mmp Maccrady and Pocono, undivided Burning Springs LTP a Mmc St Ce Mmcc Maccrady Formation anticline LTP d Om Dh Cwy Mp Pocono Group Qal Dhs Ch Devonian Period Mp Dohl LTP c Dmu Middle and Upper Devonian, undivided Obps Cw Dhs Hampshire Formation LTP m Dmn OHIO Ct Dch Chemung Group Omc Obs Dch Dbh Dbh Brailler and Harrell, undivided Stw Cwy LTP pv Ca Db Brallier Formation Obrr Cc 39° CPCc Dh Harrell Shale St Dmb Millboro Shale Mmc Dhs Dmt Mahantango Formation Do LTP d Ojo Dm Marcellus Formation Dmn Onondaga Group Om Lower Devonian, undivided LTP k Dhl Dohl Do Oriskany Sandstone Dmt Ot Dhl Helderberg Group LTP m VIRGINIA Qal Obr Silurian Period Dch Smc Om Stw Tonoloway, Wills Creek, and Williamsport Formations LTP c Dmb Sct Lower Silurian, undivided LTP a Smc McKenzie Formation and Clinton Group Dhl Stw Ojo Mbf Db St Tuscarora Sandstone Ordovician Period Ojo Juniata and Oswego Formations Dohl Mg Om Martinsburg Formation LTP nr Otbr Ordovician--Trenton and Black River, undivided 38° Mmcc Ot Trenton Group LTP k WEST VIRGINIA Obr Black River Group Omc Ordovician, middle calcareous units Mp Db Osp St.
    [Show full text]
  • Late Cretaceous to Paleogene Exhumation in Central Europe – Localized Inversion Vs
    https://doi.org/10.5194/se-2020-183 Preprint. Discussion started: 11 November 2020 c Author(s) 2020. CC BY 4.0 License. Late Cretaceous to Paleogene exhumation in Central Europe – localized inversion vs. large-scale domal uplift Hilmar von Eynatten1, Jonas Kley2, István Dunkl1, Veit-Enno Hoffmann1, Annemarie Simon1 1University of Göttingen, Geoscience Center, Department of Sedimentology and Environmental Geology, 5 Goldschmidtstrasse 3, 37077 Göttingen, Germany 2University of Göttingen, Geoscience Center, Department of Structural Geology and Geodynamics, Goldschmidtstrasse 3, 37077 Göttingen, Germany Correspondence to: Hilmar von Eynatten ([email protected]) Abstract. Large parts of Central Europe have experienced exhumation in Late Cretaceous to Paleogene time. Previous 10 studies mainly focused on thrusted basement uplifts to unravel magnitude, processes and timing of exhumation. This study provides, for the first time, a comprehensive thermochronological dataset from mostly Permo-Triassic strata exposed adjacent to and between the basement uplifts in central Germany, comprising an area of at least some 250-300 km across. Results of apatite fission track and (U-Th)/He analyses on >100 new samples reveal that (i) km-scale exhumation affected the entire region, (ii) thrusting of basement blocks like the Harz Mountains and the Thuringian Forest focused in the Late 15 Cretaceous (about 90-70 Ma) while superimposed domal uplift of central Germany is slightly younger (about 75-55 Ma), and (iii) large parts of the domal uplift experienced removal of 3 to 4 km of Mesozoic strata. Using spatial extent, magnitude and timing as constraints suggests that thrusting and crustal thickening alone can account for no more than half of the domal uplift.
    [Show full text]
  • The Role of Groundwater in the Acidification of the Hydrosphere - Examples from Small Catchments in the Bohemian Massif
    Z . HRKAL, J. BUCHTELE, E. TlKKANEN, A. KA pA H O s J. SANTRUCEK N GU -BULL 439, 2002 - PA GE 99 The role of groundwater in the acidification of the hydrosphere - examples from small catchments in the Bohemian Massif ZBYN EKHRKAL,JOSEF BUCHTELE, EEVATIKK ANEN,ASKO KApAHO &JAROMIRSANTRUCEK Hrkal, Z., Buchtele,J.,Tikkanen, E., Kapyaho, A.& Santrucek,J. 2002:The role of groundwa te r in the acidifica tion of the hydrosphere - exam ple s from small catchment s in the Bohem ian Massif.Norges qeoloqiske undersokelse Bulletin 439, 99-105 . The aim of the pre sented study was to assess the im pact of the groundwa ter on the degree of acidificati on of sur­ face w aters in small catchm ent s. Quantit ati ve hydr ogeological analy sis based on th e result s of the SACRAMENTO hydrolog ical mo de l was aime d at th e assessment of th e contribu tio n of baseflow repr esentin g th e groundwater dis­ charg e in the tot al runoff. Co mparison of single pH measureme nts in surface wate r wi th the corr espondin g actual and mo delled w ater discharge was used as th e info rmatio n in th e qu antitative part of the data processing. The obtai ned result s showed differen t prot ective pow ers of th e aq uifers against acidifica tio n,a conspicuous decrease in the soil buffer capac ity of th e Krusne hory Mts. and a significant influence of th rou gh fall precipitati on s on the gr oun dwater qu alit y.
    [Show full text]
  • Xsec A-A Sht1of2 Layout FINAL V
    U.S. DEPARTMENT OF THE INTERIOR SCIENTIFIC INVESTIGATIONS MAP 3425 U.S. GEOLOGICAL SURVEY (SHEET 1 OF 2) Explanatory pamphlet accompanies map A Ontario Allegheny Lowlands Plateau province province SEVERNE WATKINS-BEAVER LODI POINT FIRTREE DAMS ALPINE VAN ETTEN ANTICLINE ANTICLINE ANTICLINE ANTICLINE ANTICLINE ANTICLINE GLENORA SYNCLINE UNNAMED COHOCTON CORBETT POINT ENFIELD CAYUTA SYNCLINE SYNCLINE SYNCLINE SYNCLINE SYNCLINE Bend in section Bend in section Bend in section New York W SE Oatka Genesee NW SE Canisteo NW SW Pennsylvania Black Creek River Canaseraga River Tuscarora Creek Creek Creek FEET MILES 0 10 20 30 40 50 60 70 80 90 3,000 1 2 3 4 5 6 William Duchscherer, Jr. E.F. Blair and Associates NYS Natural Gas Company E.F. Blair and Associates Bowdoin Storage Service Inc. NYS Natural Gas Company No. 1 J. Klotzbach No. 1 L. Tyler No. 1 Albert McClurg No. 1 Arthur N. Kennedy No. 1 Hubbard No. 1 Robert Olin API No. 31-037-05117 API No. 31-037-04593 API No. 31-051-04552 API No. 31-051-04630 API No. 31-101-21496 API No. 31-101-03924 Genesee Co., New York Genesee Co., New York Livingston Co., New York Livingston Co., New York Steuben Co., New York Steuben Co., New York Perrysburg Formation Dunkirk Dunkirk Shale Shale 2,000 Member Wiscoy Sandstone Member Java Perrysburg West River Shale, Nunda Wiscoy Sandstone Member Formation Formation Genundewa Sandstone Member unnamed Pipe Creek 0 Pipe Creek shale member Limestone, Penn Member Shale Member Shale Member Perrysburg Yan Shale, and rmation Formation 0 Dun West River Shale, Java Fo kirk
    [Show full text]
  • Exhumation of the Orlica-Snieznik Dome
    EXHUMATION OF THE ORLICA-SNIEZNIK DOME, NORTHEASTERN BOHEMIAN MASSIF (POLAND AND CZECH REPUBLIC) A thesis presented to the faculty of the College of Arts and Sciences of Ohio University In partial fulfillment of the requirements for the degree Masters of Science Jacob M. Glascock November 2004 This thesis entitled EXHUMATION OF THE ORLICA-SNIEZNIK DOME, NORTHEASTERN BOHEMIAN MASSIF (POLAND AND CZECH REPUBLIC) BY Jacob M. Glascock has been approved for the Department of Geological Sciences and the College of Arts and Sciences by David Schneider Assistant Professor of Geological Sciences Leslie A. Flemming Dean, College of Arts and Sciences Glascock, Jacob M. M.S. November 2004. Geological Sciences Exhumation History of the Orlica Snieznik Dome, Northeastern Bohemian Massif (Poland and Czech Republic) (80 p.) Director of Thesis: David Schneider The Orlica-Snieznik Dome (OSD), located in the northeastern Bohemian massif (Czech Republic and Poland), represents a Variscan massif consisting of widespread amphibolite-facies gneisses and migmatites enclosing eclogite and granulite crustal-scale lenses. 40Ar/39Ar thermochronology yielded cooling ages for white mica and biotite between 341 ± 1 Ma to 337 ± 0.6 Ma and 342 ± 1 Ma to 334 ± 0.6 Ma from the Snieznik mountains. One amphibolite-derived hornblende yielded an integrated Ar-Ar age of ca. 400 Ma. The Orlica mountains yielded cooling ages between 338 ± 0.9 Ma to 335 ± 0.5 Ma. U-Th-total Pb monazite geochronology confirms two thermal events, likely commencing at ca. 400 Ma with granulite facies metamorphism. The cooling ages of the gneisses and schists are consistent across the dome and represent rapid wholesale cooling of the OSD, on an order of 50 oC/m.y.
    [Show full text]
  • The Sudetic Geological Mosaic: Insights Into the Root of the Variscan Orogen
    Przegl¹d Geologiczny, vol. 52, no. 8/2, 2004 The Sudetic geological mosaic: Insights into the root of the Variscan orogen Ryszard Kryza*, Stanis³aw Mazur*, Teresa Oberc-Dziedzic* A b s t r a c t: The Sudetes in the NE part of the Bohemian Massif stretch between the NW–SE-trending Odra Fault Zone and Elbe Fault Zone and represent a structural mosaic which was shaped, predominantly, during the Variscan orogeny. They are composed of various geological units, including basement units in which Neoproterozoic to Carboniferous rocks are exposed, and a post-orogenic cover of younger deposits. During the long history of geological research, the Sudetes have become a “type locality” for a range of important geological phenomena, such as granites and orthogneisses, ophiolites and (meta)volcanic sequences, granulites, eclogites and blueschists, nappe tectonics and terrane concepts. In spite of significant recent achievements, many key problems need further study, and a selection of them is proposed in this paper: (a) the presence of older, Neoproterozoic (Cadomian) rocks and their position within the Variscan collage, (b) the character and emplacement setting of Palaeozoic, pre-Variscan sedimentary successions and magmatic complexes (including ophiolites), (c) structural evolution, metamorphism (in particular HP/T grades) and exhumation of deeper crustal blocks during the Variscan orogeny, and (d) post-orogenic development. Future investigations would require an interdisciplinary approach, combining various geological disciplines: structural geology, petrology, geochemistry, geophysics and geochronology, and, also, multilateral interlaboratory cooperation. Key words: Variscan Belt, Sudetes, Cadomian orogeny, Variscan orogeny, (meta)granitoids, (meta)volcanics, ophiolites, granulites, eclogites, blueschists, nappe tectonics, terranes The Variscan orogen of Europe, one of the classically compared to the Sudetic mountain range, and largely cove- defined, global-scale orogenic systems (Suess, 1926; Kos- red by Cenozoic deposits.
    [Show full text]
  • Tors in Central European Mountains – Are They Indicators of Past Environments? ISSN 2080-7686
    Bulletin of Geography. Physical Geography Series, No. 16 (2019): 67–87 http://dx.doi.org/10.2478/bgeo-2019-0005 Tors in Central European Mountains – are they indicators of past environments? ISSN 2080-7686 Aleksandra Michniewicz University of Wroclaw, Poland Correspondence: University of Wroclaw, Poland. E-mail: [email protected] https://orcid.org/0000-0002-8477-2889 Abstract. Tors represent one of the most characteristic landforms in the uplands and mountains of Central Europe, including the Sudetes, Czech-Moravian Highlands, Šumava/Bayerischer Wald, Fichtel- gebirge or Harz. These features occur in a range of lithologies, although granites and gneisses are particularly prone to tor formation. Various models of tor formation and development have been pre- sented, and for each model the tors were thought to have evolved under specific environmental con- ditions. The two most common theories emphasised their progressive emergence from pre-Quaternary weathering mantles in a two-stage scenario, and their development across slopes under periglacial conditions in a one-stage scenario. More recently, tors have been analysed in relation to ice sheet ex- tent, the selectivity of glacial erosion, and the preservation of landforms under ice. In this paper we describe tor distribution across Central Europe along with hypotheses relating to their formation and Key words: development, arguing that specific evolutionary histories are not supported by unequivocal evidence tors, and that the scenarios presented were invariably model-driven. Several examples from the Sudetes deep weathering, are presented to demonstrate that tor morphology is strongly controlled by lithology and structure. periglacial processes, The juxtaposition of tors of different types is not necessarily evidence that they differ in their mode glacial erosion, of origin or age.
    [Show full text]
  • Large Scale Variscan Granitoid Intrusion Throughout Europe: a Lateral Geochronological Trend? K
    Large scale Variscan granitoid intrusion throughout Europe: a lateral geochronological trend? K. Oud BSc Thesis, Faculty of Earth Sciences, Utrecht University, July 2006 Abstract Large-scale granitoid intrusion during the Variscan orogeny (370 to 250 Ma) in Europe above subduction zones of that time is assumed to be the result of a heat pulse due to slab detachment. This would show from a lateral trend in age of emplacement of all granitic bodies, migrating through the complete Variscan fold belt, and thus, a younging direction perpendicular to the former subduction zones. To test this, an inventory of intrusion ages (on the basis of U-Pb, Rb-Sr and K-Ar analysis), typology (I- or S-type) and location of 70 granitic bodies in the European Variscan fold belt, from the Armorican Massif to the Bohemian Massif, was made. From the collected data, no lateral trend in age is observed. However, a trend in age parallel to former subduction zones is shown in most massifs, with a younging direction towards the thrusting vergence. This is probably the result of nappe stacking. In the Armorican Massif and Massif Central, granites are all S-type, which is probably the cause of continental subduction. In central Europe, the typology is mixed S- and I-type, which can be caused by subduction of either continental or oceanic lithosphere. 1. Introduction result of the ‘usual’ heat and melt generation attributed to subduction The Variscan orogeny yielded a large processes. However, there is another number of granitoid intrusions throughout possibility of granite emplacement that all of the European Variscides.
    [Show full text]
  • The Contact of the Bohemian Massif, Western Carpathians and Eastern Alps: Density Modelling
    GEOLOGICA CARPATHICA 70, SMOLENICE, October 9–11, 2019 GEOLOGICA CARPATHICA 70, SMOLENICE, October 9–11, 2019 The contact of the Bohemian Massif, Western Carpathians and Eastern Alps: Density modelling LENKA ŠAMAJOVÁ1, JOZEF HÓK1, MIROSLAV BIELIK 2,3 and TAMÁS CSIBRI1 1Comenius University in Bratislava, Faculty of Natural Sciences, Department of Geology and Palaeontology, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia; [email protected] 2Comenius University in Bratislava, Faculty of Natural Sciences, Department of Applied and Environmental Geophysics, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia 3Earth Science Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia Abstract: The Vienna Basin is situated at the contact of the Bohemian Massif, Western Carpathians, and Eastern Alps. Deep boreholes data and existing seismic profile were used in density modelling of the pre-Neogene basement in the Slovak part of the Vienna Basin. Density modelling was carried out along profiles oriented in NW–SE direction, across expected contacts of main geological structures. From bottom to top, the four structural floors have been defined. Bohemian Massif crystalline basement with the autochthonous Mesozoic sedimentary cover sequence. The accretionary sedimentary wedge of the Flysch Belt above the Bohemian Massif rocks sequences. The Mesozoic sediments considered to be part of the Carpathian Klippen Belt together with Mesozoic cover nappes of the Alpine and Carpathians provenance are thrust over the Flysch Belt creating the third structural floor. The Neogene sediments form the highest structural floor overlying tectonic contacts of the Flysch sediments and Klippen Belt as well as the Klippen Belt and the Alpine/Carpathians nappe structures.
    [Show full text]