Mineral Deposits of Europe

Total Page:16

File Type:pdf, Size:1020Kb

Mineral Deposits of Europe Mineral deposits of Europe Volume 1: Northwest Europe Edited by S. H. U. Bowie, A. Kvalheim and H. W. Haslam Non-metallic minerals editor A. J. G. Notholt Production editor M. J. Jones The Institution of Mining and Metallurgy The Mineralogical Society Contents Preface v Haveri gold-copper deposit 65 Kotalahti nickel belt 65 Steering Committee ..... vii Kotalahti nickel deposit .... 67 Makola and Hitura nickel deposits 70 Introduction by F. M. Yokes .... 1 Ahlainen-Kylmakoski nickel belt 72 Vammala (Stormi) nickel deposit 72 Geological framework .... 1 Kylmakoski nickel deposit 72 Metallogenic provinces and epochs . 3 Other sulphide deposits .... 73 Precambrian metallogeny ... 3 Hallinmaki copper deposit (Virtasalmi Phanerozoic metallogeny ... 7 mine) ...... 73 Economic importance of mineral production Korsnas lead deposit .... 75 of the region . 11 Matasvaara molybdenum deposit 76 Metal production 11 Chromite deposits ..... 77 Non-metallic mineral production . 13 Kemi ....... 77 Review of economic mineral deposits of the Iron-vanadium deposits .... 79 region ....... 15 Iron ore deposits in Finland 79 Iron 15 Otanmaki ilmenite-magnetite deposit 80 Manganese 19 Mustavaara deposit .... 82 Titanium 20 Magnetite deposits in northern Finland 82 Ferro-alloy metals . 21 Misi region ...... 82 Non-ferrous metals .... 25 Rautuvaara iron deposit .... 83 Miscellaneous metals .... 32 Uranium deposits ..... 83 Non-metallic minerals .... 33 Paukkajanvaara deposit .... 83 Non-metallic mineral deposits 84 Finland by Pauli Isokangas .... 39 Paakkila anthophyllite-asbestos deposit 84 Introduction ...... 39 Lahnaslampi soapstone (talc) deposit. 84 The mining industry .... 39 Kemio pegmatites .... 85 Metallogenic provinces .... 41 Haapaluoma pegmatite .... 86 North Karelia copper district ... 43 Nilsia quartzite deposit .... 87 Introduction ..... 43 Sokli apatite deposit .... 87 Main geological features .... 43 lhalainen wollastonite deposit . 89 The Outokumpu association ... 46 Siilinjarvi apatite deposit. 89 Outokumpu copper deposit ... 47 Placer gold deposits in Lapland . 90 Vuonos deposit ..... 48 Luikonlahti copper deposit ... 49 Sweden by E. Grip ..... 93 Hammaslahti copper deposit ... 50 Origin of the deposits .... 52 Introduction ...... 93 Vihanti-Pyhasalmi zinc belt ... 53 History of prospecting .... 95 Vihanti zinc deposit .... 54 Central Sweden (Bergslagen) 97 Pyhasalmi sulphide deposit ... 58 Geological setting .... 97 Orijarvi-Aijala ore belt . 61 History of mining activity 100 Main geological features . 61 Ore deposits ...... 100 Orijarvi copper-zinc deposit ... 62 Western Ludvika district 104 Aijala and Metsamonttu copper-zinc Eastern Ludvika district .... 108 deposits ...... 62 Ljusnarsberg district .... 110 Tampere schist belt 63 Nora-Strassa-Riddarhyttan-Norberg belt 113 Ylojarvi copper-tungsten deposit . 64 Filipstad district ..... 120 ix X Contents Contents xi Falun-Garpenberg-Sala sulphide belt 122 Introduction . .199 Iron ....... 256 Deposits formed during Jurassic to Pleistocene Northeastern district . .130 Maj or tectonic and metallogenetic provinces 199 Chromium ...... 257 sedimentation 306 Southern district 132 Mineral deposits in the Precambrian of Lead and zinc ..... 257 Epigenetic deposits . .313 Non-metallic minerals . .135 northern Norway ..... 202 Molybdenum . ' . 258 South Sweden 138 Sydvaranger quartz-banded iron ore Cryolite ...... Ireland by C.E.Williams and P. McArdle . 319 Southeastern Sweden .... 139 deposits 203 Other non-metallic minerals Hyper ite zone . .140 Raipas windows ..... 206 Uranium and other elements in the Ili- Introduction . .319 Southwestern Sweden . .141 Finnmarksvidda ..... 208 maussaq intrusion .... 259 Orthotectonic (metamorphic) Caledonides . 321 Non-metallic minerals . .141 Lofoten Islands 210 Paratectonic (slate-belt) Caledonides . 322 Central Norrland 143 Mineral deposits in the Precambrian of Avoca ....... 322 United Kingdom by Kingsley Dunham, K. E. Metalliferous minerals . .143 southern Norway . .212 Mineralization associated with Caledonian Beer, R. A. Ellis, M. J. Gallagher, M. J. C. Non-metallic minerals . .144 Northwestern gneiss complex . 212 granites . , . .325 Nutt and B. C. Webb .... Skellefte district 144 Kongsberg-Bamble Complex . 213 Old Red Sandstone . .326 Geological setting . .144 Ilmenite deposits of Egersund anorthosite Tectonics, sedimentation, metallogeny . 263 Lower Carboniferous limestones . 328 History of development . .146 province ...... 217 Mineral deposits in the Caledonides 266 Navan 329 Bolidenarea . .148 Nickel-copper deposits in norites and peri- Pre-orogenic deposits in the metamorphic Tynagh 331 Renstromarea . .152 dotites 220 Caledonides ..... 266 Silvermines 333 Petiktrask area . .153 Molybdenum deposits of Rogaland and Pre-orogenic deposits formed during Lower Gortdrum ...... 336 Menstrask-Elvabergetanticlinorium . 153 Vestagder 222 Palaeozoic sedimentation 266 Ballinalack 338 Malanaset anticlinorium . .154 Telemark-Setesdal copper sulphide prov• Deposits linked with Caledonian magmatism 269 Mallow 339 Kedtrask anticlinorium . .155 ince 224 Late and post-orogenic deposits 270 Abbeytown 339 Naslidendome 156 Quartz and feldspar deposits in granite peg• Mineral deposits in the post-Caledonian, Ballyvergin 340 Vindelgransele and Kristineberg anti- matites 226 pre-Variscan cover . 280 Keel 341 clinoria 157 Fen carbonatite complex . 226 Deposits in the Old Red Sandstone . 280 Aherlow 341 Adakdome 159 Mineral deposits in the Caledonides . 227 Deposits formed during Carboniferous Genesis ofthe sulphide deposits . 341 Nickel deposits . .161 Eocambrian lead belt .... 227 sedimentation ..... 280 Upper Carboniferous and later formations . 343 Gold-arsenic veins. .161 Strata-bound copper-zinc-iron sulphide Epigenetic deposits in the Carboniferous . 281 Iron deposits 343 Non-metallic minerals . .162 deposits 228 Mineral deposits in the Variscides 290 Phosphates 343 Norrbotten 163 Strata-bound lead-zinc-copper-iron sul• Pre-orogenic deposits .... 290 Kingscourt gypsum deposit . 343 Geological setting . .163 phide deposits ..... 236 Deposits linked with Armorican magmatism 292 Conclusion 343 Prospecting and mining activity . 165 Fissure vein deposits of copper, lead, zinc, Mineral deposits in post-Variscan cover 301 Iron ore deposits—introduction . 166 silver and gold 238 Deposits formed during Permian and Tri- Name index 347 Apatite-bearing iron ore deposits (Kiruna Sedimentary magnetite-hematite deposits 239 assic sedimentation .... 301 Subject index 350 type) 166 Nickel-copper deposits .... 242 Skarn iron ore deposits . .173 Chromite deposits 242 Banded quartz-rich iron ore deposits . 176 Other mineral deposits .... 242 Titaniferous iron ore deposits . .177 Mineral deposits of Permian age . 243 Manganese deposits . .177 Mineral deposits within igneous rocks . 243 Sulphide deposits 178 Contact metasomatic deposits . 244 Uranium ...... 184 Vein deposits in Precambrian areas . 245 Non-metallic minerals . .184 Metal resources and production statistics for The Caledonides and other Lower Palaeozoic metallic and non-metallic minerals . 246 rocks 185 Geology ofthe Swedish Caledonides . 185 Denmark and Greenland by Henning Sorensen, Prospecting and mining activity . 186 Bjarne Leth Nielsen and Fritz Lyngsie Strata-bound lead deposits of the Cale• Jacobsen .251 donian Front . .186 Lead-bearing veins in the Caledonides . 191 Denmark 251 Boda lead-zinc veins . .191 Introduction . .251 Lead deposits in sediments of the Cam• Kaolin and other refined clays . .251 brian Baltic Sea . .191 Moler and diatomaceous earth . .251 Inner Caledonian sulphide province . 192 Potash 252 Chromium, nickel and cobalt . 195 Rock salt 253 Uranium ...... 195 Bromine ...... 254 Non-metallic minerals . .195 Iron and manganese .... 254 Phosphate rock . 255 Greenland 255 Norway by J. A. W. Bugge . .199 Introduction ..... 255 .
Recommended publications
  • County Monaghan Groundwater Protection Scheme
    County Monaghan Groundwater Protection Scheme Main Report September 2002 Billy Moore, B.E., M.Sc., F.I.E.I. Melissa Swartz and Donal Daly County Engineer Groundwater Section County Offices, The Glen Geological Survey of Ireland Monaghan Beggars Bush Haddington Road, Dublin 4 Monaghan Groundwater Protection Scheme Authors Melissa Swartz, Groundwater Section, Geological Survey of Ireland Donal Daly, Groundwater Section, Geological Survey of Ireland with contributions by: Vincent Fitzsimons, Groundwater Section, Geological Survey of Ireland in collaboration with: Monaghan County Council Monaghan Groundwater Protection Scheme TABLE OF CONTENTS 1 INTRODUCTION...................................................................................................................................................... 1 1.1 GROUNDWATER PROTECTION – A PRIORITY ISSUE FOR LOCAL AUTHORITIES......................................................... 1 1.2 GROUNDWATER – A RESOURCE AT RISK................................................................................................................. 1 1.3 GROUNDWATER PROTECTION THROUGH LAND-USE PLANNING: A MEANS OF PREVENTING CONTAMINATION....... 2 1.4 ‘GROUNDWATER PROTECTION SCHEMES’ – A NATIONAL METHODOLOGY FOR GROUNDWATER POLLUTION PREVENTION ..................................................................................................................................................................... 2 1.5 OBJECTIVES OF THE COUNTY MONAGHAN GROUNDWATER PROTECTION SCHEME.................................................
    [Show full text]
  • Top 55" Deposits in Ireland"
    EXPLORATION AND MINING DIVISION IRELAND ZINC • LEAD • COPPER • GOLD • SILVER • BARYTES • GYPSUM • COAL • DOLOMITE • TALC THE “TOP 555”5” DEPOSITS Department of Communications, Marine and Natural Resources The Mining Heritage Ireland is richly endowed with a diversity of mineral deposits, with a mining heritage extending for over 4,000 years. Although much of the information is shrouded in time, enough remains to show that the country was firmly established as a significant metal producer at several distinct stages in history. During the Final Neolithic/Early Bronze Age (c.2400-1500 B.C.) Irish mines were an important source of copper, while alluvial gold may have been used for some of the abundant gold ornaments of this period. The 16th and 17th centuries were a time of extensive iron production, while the 19th century saw continuous copper, lead and silver output for over 70 years, as well as a “gold rush” around the start of the century. And finally, the period since the 1960s have seen Ireland enjoy the status of a world-ranked producer of zinc, lead and barite, and become one of the most promising exploration territories in Europe. Historical Record The first evidence of mineral deposits as an important resource in Ireland after the Stone Age is to be found in Bronze Age times (c.2300-500 B.C.) or a little earlier. Recent research has established that primitive copper mines were worked in SW Ireland in the period c.2400-1500 B.C., with the bulk of those dated during the period c.1700-1500 B.C.
    [Show full text]
  • County Cavan Groundwater Protection Scheme
    County Cavan Groundwater Protection Scheme Volume I: Main Report Final December 2008 Jack Keyes, Sonja Masterson County Manager Groundwater Section Cavan County Council Geological Survey of Ireland Courthouse Beggars Bush Farnham Street Haddington Road, Dublin 4 Cavan Cavan Groundwater Protection Scheme. Volume I. Cavan County Council and the Geological Survey of Ireland Authors Sonja Masterson, Coran Kelly and Monica Lee, Groundwater Section, Geological Survey of Ireland with Fieldwork Assistance from: Eamon O’Loughlin, Groundwater Section, Geological Survey of Ireland and Reporting Assistance from: Caoimhe Hickey, Taly Hunter Williams, Groundwater Section, Geological Survey of Ireland in partnership with: Cavan County Council Cavan Groundwater Protection Scheme. Volume I. Cavan County Council and the Geological Survey of Ireland Cavan Groundwater Protection Scheme. Volume I. Cavan County Council and the Geological Survey of Ireland Executive Summary The Groundwater Protection Scheme for Cavan County Council provides a preliminary assessment of the relative risk to groundwater quality across the county. The main elements of the risk assessment are groundwater vulnerability (primarily subsoil thickness, subsoil permeability and karst features), aquifer potential, and source protection. The source protection element involves the delineation of protection areas around the recharge areas for selected public and group scheme groundwater supplies. The results can not be used as a substitute for site investigation for particular developments, but have proved very useful in providing County Councils with an independent, defensible, planning tool for a wide range of new developments: • Major developments (e.g. for landfill site selection, developments requiring waste management and integrated pollution licensing): helping to short-list suitable sites for detailed site investigation.
    [Show full text]
  • Environmental Impact Statement Kilmainhamwood Compost Facility
    qj ENVIRONMENTAL IMPACT STATEMENT KILMAINHAMWOOD COMPOST FACILITY EXTENSION BALLYNALURGAN, KILMAINHAMWOOD, KELLS, CO. MEATH ForMay inspection purposes2010 only. Consent of copyright owner required for any other use. TOBIN CONSULTING ENGINEERS EPA Export 26-07-2013:19:07:53 REPORT PROJECT: Application for Extension of Existing Composting Facility at Kilmainhamwood, Co. Meath CLIENT: Thorntons Recycling Unit S3B Henry Road Parkwest Business Park Dublin 12 For inspection purposes only. Consent of copyright owner required for any other use. COMPANY: TOBIN Consulting Engineers Block 10-4 Blanchardstown Corporate Park Dublin 15 www.tobin.ie EPA Export 26-07-2013:19:07:53 5361- Kilmainhamwood Compost Facility Extension- EIS DOCUMENT AMENDMENT RECORD Client: Thorntons Recycling Project: Application for Extension of Existing Composting Facility at Kilmainhamwood, Co. Meath Title: Environmental Impact Statement (EIS) – Waste Licence Application For inspection purposes only. Consent of copyright owner required for any other use. PROJECT NUMBER: 5361 DOCUMENT REF: 5361-04-07 C Final ED 06-01-10 PON 24-05-10 DG 24-05-10 Revision Description & Rationale Originated Date Checked Date Authorised Date TOBIN Consulting Engineers i EPA Export 26-07-2013:19:07:53 5361- Kilmainhamwood Compost Facility Extension- EIS TABLE OF CONTENTS 1 INTRODUCTION ....................................................................................... 1 1.1 GENERAL ...............................................................................................................1
    [Show full text]
  • (SEA) Environmental Report
    The Border Regional Authority Údarás Réigiúnach na Teorann Draft Strategic Environmental Assessment (Environmental Report) of the Draft Regional Planning Guidelines (2010-2022) January 2010 Draft SEA Environmental Report The Border Regional Authority Údarás Réigiúnach na Teorann While all reasonable efforts have been made to ensure the accuracy of the material contained in this publication, complete accuracy is not guaranteed. Neither the Border Regional Authority nor the author(s) accept any responsibility whatsoever for loss or damage occasioned or claimed to have been occasioned, in part or in full, as a consequence of any person acting or refraining from acting, as a result of a matter contained in this publication. Strategic Environmental Assessment Team Project Manager: Pádraig Maguire Border Regional Authority. SEA Project Leader: Paudge Keenaghan Leitrim County Council. Project Advisors: Terry Savage Louth County Council Ciarán Tracey Leitrim County Council Draft SEA Environmental Report Non- Technical Summary Introduction ............................................................................................................................. vi Steps in the Process ............................................................................................................. vi Content of Environmental Report ......................................................................................... vii Vision and Key Strategic Goals for the Region .................................................................... vii Consultation
    [Show full text]
  • Albert Formation 25, 28 Antrim Lava Group 288 Apatite Fission Track
    Index Albert Formation 25, 28 impact on Mesozoic 391 Antrim Lava Group 288 setting 388 apatite fission track analysis 175-6, 176-7 Broadford Beds Formation 37, 58, 102, 318, 319, 324 experimental results 177-81 Bundoran 460 experimental results discussed 181-4 Bundoran Shale Formation 205, 208-9, 213 implications of results 184-7 burial histories Applecross Formation 98, 106-7 N Ireland 250 Archaeonassa 221 NW Seaboard 3-5 Arenicolites 221-3, 236 Scotland 75-7 Arran Basin 78, 85-6 burrows 234 Assaroe Lake 459-60 Asteriacites 223-5 Atlantic Basin evolution, North calcite see carbonates plate motions 401-5 Caledonian Orogen 422-5 plate reconstructions 405-10 Camasunary Fault 98, 106-7, 114 plate reconstructions discussed 410-17 Canada, continental margin of plate setting 397-401 lithostratigraphy 191-4 Atlantic Seaway evolution source rocks 28 Cretaceous 441-3 stratigraphy 25-8 Jurassic 432-41 Canice Basin 377, 381 Triassic 428-32 Canna Formation 306 Permian 425-8 Canso Group 26, 27, 192 Palaeozoic 422-5 Cantabrian Basin 399 Aulichnites 225 cap rocks see seal rocks authigenic minerals 245-8 carbonates concretion studies Bakevillia Sea 428 methods of analysis 145-6 Ballycastle 243,245,455 results 149 Ballycotton Group 61 results discussed 149-52 Ballydeenlea outlier 260 leaching 85,246 Ballymore Beds 205 precipitation 81-3 Ballyshannon Limestone Formation 205, 211,458 Carboniferous Barents Shelf and Sea 425 source rocks 449, 451 Barra Formation 306 Canada 28 Barra Volcanic Ridge System 381 Midland Valley 23 baryte 86, 87 NW Seaboard 7, 7-9,
    [Show full text]
  • 2990 Constraints Report Kingscourt to Woodland 070807 Final
    KINGSCOURT TO WOODLAND CONSTRAINTS REPORT VOLUME I July 2007 Soluziona & TOBIN Consulting Engineers CONSTRAINTS REPORT Prepared on behalf of EirGrid: EirGrid Plc 27 Lower Fitzwilliam St Dublin 2 Ireland Prepared by: TOBIN Consulting Engineers Block 10-3 Blanchardstown Corporate Park 2990Rp000 i Kingscourt to Woodland Constraints Report (Volume I) KINGSCOURT TO WOODLAND DOCUMENT AMENDMENT RECORD Client: EirGrid plc Project: Kingscourt to Woodland Power Line Route Option Title: Constraints Report (Volume I) Project Rp: 2990 Document Ref: 2990Rp0002 B Issued for Circulation MH COK COK 20/07/07 A Final Issue MH COK COK 08/06/07 D03 Final Draft Issue MH COK COK 08/04/07 D02 Draft Issue for Approval MH COK COK 13/03/07 Revision Purpose / Description Originated Checked Authorised Date TOBIN Consulting Engineers 2990Rp B ii Kingscourt to Woodland Constraints Report (Volume I) TABLE OF CONTENTS 1 EXECUTIVE SUMMARY .....................................................................................................................................................1 1.1 TERMS OF REFERENCE ........................................................................................................................................1 1.2 STRATEGIC PLANNING CONTEXT........................................................................................................................1 1.3 SOCIO-ECONOMIC .................................................................................................................................................1 1.4 LANDSCAPE
    [Show full text]
  • 8 Cavan Aquifer Hydrochemistry
    County Cavan Groundwater Protection Scheme – Volume II Water Quality 8 Cavan Aquifer Hydrochemistry 8.1 Introduction This chapter aims to provide an overview of the chemical characteristics of groundwater in County Cavan, based on available hydrochemical data. This includes the background chemistry of the various aquifer types present in Cavan, and of the water quality and chemical indicators of typical pollutants in the county. Relationships are examined between water quality problems and human pressures, and vulnerability. An understanding of these relationships will help decision-makers prioritise: • hazard surveys, • remedial measures, • more detailed water quality monitoring. This chapter is intended for use by engineers, planners, regulators and hydrogeologists who are considering the causes of groundwater quality problems across the county. 8.2 Scope 8.2.1 Key Concepts Assessments are built upon laboratory analyses of raw water samples taken prior to treatment from public water supplies, private industrial supplies, and some domestic supplies, in order to gather and present as much information as possible. The chemical signature of groundwater bodies is discussed (where data are available). Contamination indicators have been selected for discussion as follows; nitrates, chloride, ammonia, E. coli or faecal coliforms, potassium, sodium, iron and manganese. Concentrations of these indicators in each supply are compared with GSI recommended guide levels to help identify where groundwater is likely to be susceptible to pollution. Many of the results are one- off samples collated from individual reports, therefore bacteriological results in particular cannot always be taken as completely representative of the ongoing groundwater quality status, as their occurrence in groundwater is typically intermittent.
    [Show full text]
  • Cavan County Council
    Cavan County Council Establishment of Groundwater Source Protection Zones Kingscourt Water Supply Scheme Mullantra Borehole May 2011 RevC Prepared by: Peter Conroy On behalf of the Geological Survey of Ireland With contributions from: Ms. Jenny Deakin & Dr. Robert Meehan And with assistance from: Cavan County Council l v Geological Survey of Ireland Kingscourt Public Water Supply Groundwater Source Protection Zones Project description Since the 1980’s, the Geological Survey of Ireland (GSI) has undertaken a considerable amount of work developing Groundwater Protection Schemes throughout the country. Groundwater Source Protection Zones are the surface and subsurface areas surrounding a groundwater source, i.e. a well, wellfield or spring, in which water and contaminants may enter groundwater and move towards the source. Knowledge of where the water is coming from is critical when trying to interpret water quality data at the groundwater source. The Source Protection Zone also provides an area in which to focus further investigation and is an area where protective measures can be introduced to maintain or improve the quality of groundwater. Cavan County Council contracted GSI to delineate source protection zones for groundwater public water supply sources in Co. Cavan. In the current phase of investigations the sources for which delineations have been requested are Kingscourt and Ballyconnell. This report documents the delineation of the Kingscourt source protection zones for the Mullantra source borehole. A suite of maps and digital GIS layers accompany this report and the reports and maps are hosted on the GSI website (www.gsi.ie). i Geological Survey of Ireland Kingscourt Public Water Supply Groundwater Source Protection Zones TABLE OF CONTENTS 1 Introduction .............................................................................................................
    [Show full text]
  • The Top 55 Deposits
    EXPLORATION AND MINING DIVISION IRELAND ZINC • LEAD • COPPER • GOLD • SILVER • BARYTES • GYPSUM • COAL • DOLOMITE • TALC THE “TOP 555”5” DEPOSITS Department of Communications, Marine and Natural Resources The Mining Heritage Ireland is richly endowed with a diversity of mineral deposits, with a mining heritage extending for over 4,000 years. Although much of the information is shrouded in time, enough remains to show that the country was firmly established as a significant metal producer at several distinct stages in history. During the Final Neolithic/Early Bronze Age (c.2400-1500 B.C.) Irish mines were an important source of copper, while alluvial gold may have been used for some of the abundant gold ornaments of this period. The 16th and 17th centuries were a time of extensive iron production, while the 19th century saw continuous copper, lead and silver output for over 70 years, as well as a “gold rush” around the start of the century. And finally, the period since the 1960s have seen Ireland enjoy the status of a world-ranked producer of zinc, lead and barite, and become one of the most promising exploration territories in Europe. Historical Record The first evidence of mineral deposits as an important resource in Ireland after the Stone Age is to be found in Bronze Age times (c.2300-500 B.C.) or a little earlier. Recent research has established that primitive copper mines were worked in SW Ireland in the period c.2400-1500 B.C., with the bulk of those dated during the period c.1700-1500 B.C.
    [Show full text]
  • IGA/CGA KEYNOTE ADDRESS Friday 17 February 2012 the Origin of Animal Ecosystems
    IGA/CGA KEYNOTE ADDRESS Friday 17th February 2012 The origin of animal ecosystems: integrating the Cambrian Explosion and Ordovician Radiation Professor Dave Harper ([email protected]) Department of Earth Sciences, Durham University, Durham DH1 3LE, UK The Cambrian Explosion and the Great Ordovician Biodiversification Event (GOBE) marked two major turning points in the history of life. Although animals originated deep in the Neoproterozoic, some 13 animal phyla appeared for the first time during the early to mid Cambrian, many exceptionally preserved in Lagerstätten, for example Sirius Passet, and many representing some quite remarkable and bizarre body plans such as Anomalocaris, Hallucigenia and Opabinia. A modern-style marine ecosystem was already in place but that must wait some 30 million years before real biodiversity characterized community structures. During the GOBE, an interval of some 35 million years, accelerating inter-provincial (aided by dispersed continents), inter-community (migrations into deeper water) and intra-community (a narrowing of ecological niches) diversity generated a marked biodiversity spike in the later Ordovician. Traditionally both events have been viewed as discrete biotic radiations. New biodiversity trajectories for Late Precambrian - Palaeozoic biodiversity suggest that both can be placed in a sequence linking the soft-bodied ecosystems of the Neoproterozoic Ediacaran with the complex Devonian Nekton Revolution. Ecological factors, such as the escalation of predation, were major drivers of this biodiversity change. SHELL SPONSORED KEYNOTE ADDRESS Saturday 20th February 2012 On the link between climate and hominin evolution Professor Dick Kroon, University of Edinburgh, J.C.A. Joordens, University of Leiden, H.B. Vonhof, Vrije Universiteit, S.Jung, University of Edinburgh, D.
    [Show full text]
  • Texto Completo Digital
    Naturalis Repositorio Institucional Universidad Nacional de La Plata http://naturalis.fcnym.unlp.edu.ar Facultad de Ciencias Naturales y Museo Palinoestratigrafía del Paleozoico Superior de la Cuenca Colorado, República Argentina y su correlación con áreas relacionadas Balarino, M.Lucía Doctor en Ciencias Naturales Dirección: Gutiérrez, Pedro R. Co-dirección: Ballent, Sara Facultad de Ciencias Naturales y Museo 2009 Acceso en: http://naturalis.fcnym.unlp.edu.ar/id/20120126000968 Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional Powered by TCPDF (www.tcpdf.org) Balarino, M. Lucía _______________________________________________________________________________ CONTENIDO RESUMEN 1 ABSTRACT 4 I. INTRODUCCIÓN 7 II. MARCO GEOLÓGICO REGIONAL 17 II.1. Cuenca Claromecó 19 II.1.1.Grupo Pillahuincó 23 II.1.1.a. Formación Sauce Grande 23 II.1.1.b. Formación Piedra Azul 25 II.1.1.c. Formación Bonete 26 II.1.1.d. Formación Tunas 27 II.2. Cuenca Colorado 30 II.2.1. Estadío de pre-rift 32 II.2.2. Estadío de syn-rift (Jurásico Tardío-Cretácico Temprano) 33 II.2.3. Estadío de post-rift (Cretácico Temprano) 33 II.2.4. Estadío de margen pasivo (Paleógeno-Cuaternario) 34 II.3. Perforaciones realizadas en las Cuencas Colorado y Claromecó 38 II.3.1. Perforación UTAL-Cruz del Sur x-1 41 II.3.2. Perforación UTAL-Estrella x-1 41 II.3.3. Perforación YPF-Puelches x-1 42 III. MATERIALES Y MÉTODOS 45 IV. LISTADO DE ESPECIES DESCRIPTAS 55 IV.1. Auctóctonas 57 IV.2. Retrabajo 60 V. SISTEMÁTICA 61 V.1. Auctóctonas 63 V.2. Retrabajo 377 VI.
    [Show full text]