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Assembly, Configuration, and Break-Up History of Rodinia
Author's personal copy Available online at www.sciencedirect.com Precambrian Research 160 (2008) 179–210 Assembly, configuration, and break-up history of Rodinia: A synthesis Z.X. Li a,g,∗, S.V. Bogdanova b, A.S. Collins c, A. Davidson d, B. De Waele a, R.E. Ernst e,f, I.C.W. Fitzsimons g, R.A. Fuck h, D.P. Gladkochub i, J. Jacobs j, K.E. Karlstrom k, S. Lu l, L.M. Natapov m, V. Pease n, S.A. Pisarevsky a, K. Thrane o, V. Vernikovsky p a Tectonics Special Research Centre, School of Earth and Geographical Sciences, The University of Western Australia, Crawley, WA 6009, Australia b Department of Geology, Lund University, Solvegatan 12, 223 62 Lund, Sweden c Continental Evolution Research Group, School of Earth and Environmental Sciences, University of Adelaide, Adelaide, SA 5005, Australia d Geological Survey of Canada (retired), 601 Booth Street, Ottawa, Canada K1A 0E8 e Ernst Geosciences, 43 Margrave Avenue, Ottawa, Canada K1T 3Y2 f Department of Earth Sciences, Carleton U., Ottawa, Canada K1S 5B6 g Tectonics Special Research Centre, Department of Applied Geology, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia h Universidade de Bras´ılia, 70910-000 Bras´ılia, Brazil i Institute of the Earth’s Crust SB RAS, Lermontova Street, 128, 664033 Irkutsk, Russia j Department of Earth Science, University of Bergen, Allegaten 41, N-5007 Bergen, Norway k Department of Earth and Planetary Sciences, Northrop Hall University of New Mexico, Albuquerque, NM 87131, USA l Tianjin Institute of Geology and Mineral Resources, CGS, No. -
Callovian and Tithonian Paleogeography Legend (.Pdf)
CALLOVIAN AND TITHONIAN AaTa Aaiun-Tarfay a Basin EVB East Venezuela Basin Mar Mardin SBet Subbetic Adha Adhami Ev ia Ev ia MarB Marmarica Basin SuBu Subbucov inian PALEOGEOGRAPHY Adri Adriatic Ex Li Ex ternal Ligurian Mars Marseille SuDa Susuz Dag LEGEND Akse Akseki Ex Ri Ex ternal Rif MAt Middle Atlas SuGe Supra-Getic Alda Aldama Ex Su Ex ternal Subetic MaU May a Uplift SuMo Supramonte Almo Almopias Ex u Ex uma MazP Mazagan Plateau Tab Tabriz Author: Caroline Wilhem Ana Anamas Fat Fatric Mec Mecsek Taba Tabas University of Lausanne - Institute of Earth Sciences Ani Anina FCB Flemish Cap Basin MC Massif Central Tac Tacchi Sheet 3 (3 sheets: 2 maps + legend; explanatory text) Ann Annecy Flor Florida Med Medv elica TadB Taoudeni Basin Anta Antaly a FoAm Foz do Amazonas Basin Mel Meliata Tahu Tahue Apu Apulia Fran Francardo Men Menderes Tal Talesh Aqui Aquitaine Basin Fri Friuli Meri Merida TaMi Tampica-Misant Basina Argo Argolis Gab Gabrov o Mese Meseta TanA Tanaulipas Arch PALEOENVIRONMENTS Armo Armorica GalB Galicia Bank MeSu Median Subbetic TaOr Talea Ori Ask Askipion Gav Gav roro Mig Migdhalista Tat Tatric Exposed land Atla Atlas GBB Grand Banks Basin Mir Mirdita Teh Tehran GeBB Georges Bank Basin Fluviodeltaic environment BaCa Baja California Mist Mistah Terek Terek BaDa Barla Dag GCau Great Caucasus Mix Mix teca TeT Tellian Trough Evaporitic platform Bade Badenli Geme Gemeric Mo Mostar Theo Theokafta Baju Bajuv aric Gen Genev a MoeP Moesian Platform TimB Timimoun Basin Terrigenous shelf and shallow basin Bako Bakony Gere Gerecse Monc -
Taoudeni Basin Report
Integrated and Sustainable Management of Shared Aquifer Systems and Basins of the Sahel Region RAF/7/011 TAOUDENI BASIN 2017 INTEGRATED AND SUSTAINABLE MANAGEMENT OF SHARED AQUIFER SYSTEMS AND BASINS OF THE SAHEL REGION EDITORIAL NOTE This is not an official publication of the International Atomic Energy Agency (IAEA). The content has not undergone an official review by the IAEA. The views expressed do not necessarily reflect those of the IAEA or its Member States. The use of particular designations of countries or territories does not imply any judgement by the IAEA as to the legal status of such countries or territories, or their authorities and institutions, or of the delimitation of their boundaries. The mention of names of specific companies or products (whether or not indicated as registered) does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA. INTEGRATED AND SUSTAINABLE MANAGEMENT OF SHARED AQUIFER SYSTEMS AND BASINS OF THE SAHEL REGION REPORT OF THE IAEA-SUPPORTED REGIONAL TECHNICAL COOPERATION PROJECT RAF/7/011 TAOUDENI BASIN COUNTERPARTS: Mr Adnane Souffi MOULLA (Algeria) Mr Abdelwaheb SMATI (Algeria) Ms Ratoussian Aline KABORE KOMI (Burkina Faso) Mr Alphonse GALBANE (Burkina Faso) Mr Sidi KONE (Mali) Mr Aly THIAM (Mali) Mr Brahim Labatt HMEYADE (Mauritania) Mr Sidi Haiba BACAR (Mauritania) EXPERT: Mr Jean Denis TAUPIN (France) Reproduced by the IAEA Vienna, Austria, 2017 INTEGRATED AND SUSTAINABLE MANAGEMENT OF SHARED AQUIFER SYSTEMS AND BASINS OF THE SAHEL REGION INTEGRATED AND SUSTAINABLE MANAGEMENT OF SHARED AQUIFER SYSTEMS AND BASINS OF THE SAHEL REGION Table of Contents 1. -
A Fundamental Precambrian–Phanerozoic Shift in Earth's Glacial
Tectonophysics 375 (2003) 353–385 www.elsevier.com/locate/tecto A fundamental Precambrian–Phanerozoic shift in earth’s glacial style? D.A.D. Evans* Department of Geology and Geophysics, Yale University, P.O. Box 208109, 210 Whitney Avenue, New Haven, CT 06520-8109, USA Received 24 May 2002; received in revised form 25 March 2003; accepted 5 June 2003 Abstract It has recently been found that Neoproterozoic glaciogenic sediments were deposited mainly at low paleolatitudes, in marked qualitative contrast to their Pleistocene counterparts. Several competing models vie for explanation of this unusual paleoclimatic record, most notably the high-obliquity hypothesis and varying degrees of the snowball Earth scenario. The present study quantitatively compiles the global distributions of Miocene–Pleistocene glaciogenic deposits and paleomagnetically derived paleolatitudes for Late Devonian–Permian, Ordovician–Silurian, Neoproterozoic, and Paleoproterozoic glaciogenic rocks. Whereas high depositional latitudes dominate all Phanerozoic ice ages, exclusively low paleolatitudes characterize both of the major Precambrian glacial epochs. Transition between these modes occurred within a 100-My interval, precisely coeval with the Neoproterozoic–Cambrian ‘‘explosion’’ of metazoan diversity. Glaciation is much more common since 750 Ma than in the preceding sedimentary record, an observation that cannot be ascribed merely to preservation. These patterns suggest an overall cooling of Earth’s longterm climate, superimposed by developing regulatory feedbacks -
Insights on the Crustal Evolution of the West African (Raton from Hf Isotopes in Detrital Zircons from the Anti-Atlas Belt
Insights on the crustal evolution of the West African (raton from Hf isotopes in detrital zircons from the Anti-Atlas belt a b c d b ]acobo Abati ,., Abdel Mohsine Aghzer , 1 , Axel Gerdes , ,2, Nasser Ennih • Departamento de Petrologfa y Geoquimica and Instituto de Geologia Econ6mica, Universidad Comp!utense/Consejo Superior de Investigaciones Cientificas. 28040 Madrid, Spain b Departament Ge% gie. Faculte des Sciences, Universite Chouaib Doukkali, EIJadida. Morocco c InstitutftirGeowissenschaften. Minera/ogie, Goethe-UniversityFrankfurt (GUF),Altenhoferallee 1. D-60438 Frankfurt amMain, Gennany d Department of Earth Sciences, SteIIenbosch University.Private BagXl. Matieland 7602, South Africa ABSTRACT The Lu-Hf isotopic composition of detrital zircons has been used to investigate the crustal evolution of the northern part of the West African (raton (WAC). The zircons were separated from six samples of siliciclastic sedimentary rocks from the main Neoproterozic stratigraphic units of the Anti-Atlas belt, from the SiIWa and Zenaga inliers. The data suggest that the north part of the WAC formed during three cycles of juvenile crust formation with variable amount of reworking of older crust. The younger group of zircons, with a main population clustering around 610 Ma, has a predominant juvenile character and Keyworili: evidences of moderate mixing with Paleoproterozoic and Neoarchean crust, which supports that most Anti-Atlas belt igneous and metamorphic rocks where zircons originally crystallized were formed in an ensialic mag Morocco Hfisotopes matic arc environment. The group of zircons in the age range 1.79-2.3 Ca corresponds to the major crust Detrital zircon forming event in the WAC: the Eburnian orogeny. -
A History of Proterozoic Terranes in Southern South America: from Rodinia to Gondwana
+ MODEL GEOSCIENCE FRONTIERS -(-) (2011) 1e9 available at www.sciencedirect.com China University of Geosciences (Beijing) GEOSCIENCE FRONTIERS journal homepage: www.elsevier.com/locate/gsf REVIEW A history of Proterozoic terranes in southern South America: From Rodinia to Gondwana C. Casquet a,*, C.W. Rapela b, R.J. Pankhurst c, E.G. Baldo d, C. Galindo a, C.M. Fanning e, J.A. Dahlquist d, J. Saavedra f a Departamento de Petrologıa y Geoquımica, IGEO (Universidad Complutense, CSIC), 28040 Madrid, Spain b Centro de Investigaciones Geologicas (CONICET-UNLP), 1900 La Plata, Argentina c Visiting Research Associate, British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom d CICTERRA (CONICET-UNC), 5000 Cordoba, Argentina e Research School of Earth Sciences, The Australian National University, Canberra, Australia f Instituto de Agrobiologıa y Recursos Naturales CSIC, 37071 Salamanca, Spain Received 3 August 2011; accepted 8 November 2011 KEYWORDS Abstract The role played by Paleoproterozoic cratons in southern South America from the Mesopro- Paleoproterozoic; terozoic to the Early Cambrian is reconsidered here. This period involved protracted continental amal- Cratons; gamation that led to formation of the supercontinent Rodinia, followed by Neoproterozoic continental Grenvillian; break-up, with the consequent opening of Clymene and Iapetus oceans, and finally continental Neoproterozoic rifting; re-assembly as Gondwana through complex oblique collisions in the Late Neoproterozoic to Early SW Gondwana assembly Cambrian. The evidence for this is based mainly on a combination of precise U-Pb SHRMP dating and radiogenic isotope data for igneous and metamorphic rocks from a large area extending from the Rio de la Plata craton in the east to the Argentine Precordillera in the west and as far north as Arequipa in Peru. -
Sa˜O Luıs Craton and Gurupi Belt (Brazil)
Sa˜o Luı´s Craton and Gurupi Belt (Brazil): possible links with the West African Craton and surrounding Pan-African belts E. L. KLEIN1,2 & C. A. V. MOURA3 1CPRM (Companhia de Pesquisa de Recursos Minerais)/Geological Survey of Brazil, Av. Dr. Freitas, 3645, Bele´m-PA, CEP 66095-110, Brazil (e-mail: [email protected]) 2Researcher at CNPq (Conselho Nacional de Desenvolvimento Cientı´fico e Tecnolo´gico) 3Laborato´rio de Geologia Isoto´pica/Para´-Iso, Universidade Federal do Para´, Centro de Geocieˆncias, CP 1611, Bele´m-PA, Brazil, CEP 66075-900 Abstract: The Sa˜o Luı´s Craton and the Palaeoproterozoic basement rocks of the Neoproterozoic Gurupi Belt in northern Brazil are part of an orogen having an early accretionary phase at 2240– 2150 Ma and a late collisional phase at 2080 + 20 Ma. Geological, geochronological and isotopic evidence, along with palaeogeographic reconstructions, strongly suggest that these Brazilian terrains were contiguous with the West African Craton in Palaeoproterozoic times, and that this landmass apparently survived subsequent continental break-up until its incorporation in Rodinia. The Gurupi Belt is an orogen developed in the southern margin of the West African–Sa˜o Luı´s Craton at c. 750–550 Ma, after the break up of Rodinia. Factors such as present-day and possible past geographical positions, the timing of a few well-characterized events, the structural polarity and internal structure of the belt, in addition to other indirect evidence, all favour correlation between the Gurupi Belt and other Brasiliano/Pan-African belts, especially the Me´dio Coreau´ domain of the Borborema Province and the Trans-Saharan Belt of Africa, despite the lack of proven physical links between them. -
The Making and Unmaking of a Supercontinent: Rodinia Revisited
Tectonophysics 375 (2003) 261–288 www.elsevier.com/locate/tecto The making and unmaking of a supercontinent: Rodinia revisited Joseph G. Meerta,*, Trond H. Torsvikb a Department of Geological Sciences, University of Florida, 241 Williamson Hall, PO Box 11210 Gainesville, FL 32611, USA b Academy of Sciences (VISTA), c/o Geodynamics Center, Geological Survey of Norway, Leif Eirikssons vei 39, Trondheim 7491, Norway Received 11 April 2002; received in revised form 7 January 2003; accepted 5 June 2003 Abstract During the Neoproterozoic, a supercontinent commonly referred to as Rodinia, supposedly formed at ca. 1100 Ma and broke apart at around 800–700 Ma. However, continental fits (e.g., Laurentia vs. Australia–Antarctica, Greater India vs. Australia– Antarctica, Amazonian craton [AC] vs. Laurentia, etc.) and the timing of break-up as postulated in a number of influential papers in the early–mid-1990s are at odds with palaeomagnetic data. The new data necessitate an entirely different fit of East Gondwana elements and western Gondwana and call into question the validity of SWEAT, AUSWUS models and other variants. At the same time, the geologic record indicates that Neoproterozoic and early Paleozoic rift margins surrounded Laurentia, while similar-aged collisional belts dissected Gondwana. Collectively, these geologic observations indicate the breakup of one supercontinent followed rapidly by the assembly of another smaller supercontinent (Gondwana). At issue, and what we outline in this paper, is the difficulty in determining the exact geometry of the earlier supercontinent. We discuss the various models that have been proposed and highlight key areas of contention. These include the relationships between the various ‘external’ Rodinian cratons to Laurentia (e.g., Baltica, Siberia and Amazonia), the notion of true polar wander (TPW), the lack of reliable paleomagnetic data and the enigmatic interpretations of the geologic data. -
U-Pb Geochronologic Evidence for the Evolution of the Gondwanan Margin of the North-Central Andes
U-Pb geochronologic evidence for the evolution of the Gondwanan margin of the north-central Andes David M. Chew† Urs Schaltegger Department of Mineralogy, University of Geneva, Rue des Maraîchers 13, 1205 Geneva, Switzerland Jan Košler Department of Earth Science, University of Bergen, Allegaten 41, N-5007 Bergen, Norway Martin J. Whitehouse Laboratory for Isotope Geology, Swedish Museum of Natural History, S-104 05 Stockholm, Sweden Marcus Gutjahr Institute for Isotope Geology and Mineral Resources, ETH-Zentrum, Clausiusstrasse 25, CH-8092 Zürich, Switzerland Richard A. Spikings Aleksandar Miškovi´c Department of Mineralogy, University of Geneva, Rue des Maraîchers 13, 1205 Geneva, Switzerland ABSTRACT zircon overgrowths from amphibolite-facies limited because they are either obscured by later schists, which reveals metamorphic events tectonic events along the convergent margin or We investigated the Neoproterozoic–early at ca. 478 and ca. 312 Ma and refutes the buried by the ubiquitous volcanic cover. Paleozoic evolution of the Gondwanan mar- previously assumed Neoproterozoic age for This problem is particularly acute in the gin of the north-central Andes by employing orogeny in the Peruvian Eastern Cordillera. north-central Andes, where Precambrian base- U-Pb zircon geochronology in the Eastern The presence of an Ordovician magmatic ment is not exposed for over 2000 km along Cordilleras of Peru and Ecuador using a and metamorphic belt in the north-central strike, from 15°S in Peru to 2°S in Colombia. combination of laser-ablation–inductively Andes demonstrates that Famatinian meta- This corresponds to the distance between the coupled plasma–mass spectrometry detrital morphism and subduction-related mag- northern extent of the Arequipa-Antofalla base- zircon analysis and dating of syn- and post- matism were continuous from Patagonia ment (Fig. -
From Rodinia to Gondwana
A history of Proterozoic terranes in southern South America: From Rodinia to Gondwana C. Casquet a,*, c.w. Rapela b, R.J. Pankhurst c, E.G. Baldo d, C. Galindo a, C.M. Fanning e, J.A. Dahlquist d, J. Saavedra f a Departamento de Petrologia y Geoquimica, ICEO (Universidad Complutense, CSIC), 28040 Madrid, Spain b Centra de Investigaciones Geologicas (CONICET-UNLP), 1900 La Plata, Argentina C 'Visiting Research Associate, British Geological SUlVey, Keyworth, Nottingham NG12 SCC, United Kingdom d CICTERRA (CONICET-UNC), 5000 Cordoba, Argentina e Research School of Earth Sciences, The Australian National University, Canberra, Australia f Instituto de Agrobiologia y Recursos Naturales CSIC, 37071 Salamanca, Spain KEYWORDS Abstract The role played by Paleoproterozoic cratons in southern South America from the Mesopro Paleoproterozoic; terozoic to the Early Cambrian is reconsidered here. This period involved protracted continental amal Cratons; gamation that led to formation of the supercontinent Rodinia, followed by N eoproterozoic continental Grenvillian; break-up, with the consequent opening of Clymene and Iapetus oceans, and finally continental Neoproterozoic rifting; re-assembly as Gondwana through complex oblique collisions in the Late Neoproterozoic to Early SW Gondwana assembly Cambrian. The evidence for this is based mainly on a combination of precise U-Pb SHRMP dating and radiogenic isotope data for igneous and metamorphic rocks from a large area extending from the Rio de la Plata craton in the east to the Argentine Precordillera in the west and as far north as Arequipa in Peru. Our interpretation of the paleogeograpbical and geodynamic evolution invokes a hypothetical Paleoproterozoic block (MARA) embracing basement ultimately older than 1.7 Ga in the Western Sierras 1. -
Archean Evolution of the Southern São Francisco
ARCHEAN EVOLUTION OF THE SOUTHERN SÃO FRANCISCO CRATON (SE BRAZIL) i ii FUNDAÇÃO UNIVERSIDADE FEDERAL DE OURO PRETO Reitor Cláudia Aparecida Marliére de Lima Vice-Reitor Hermínio Arias Nalini Júnior Pró-Reitor de Pesquisa e Pós-Graduação Sérgio Francisco de Aquino ESCOLA DE MINAS Diretor Issamu Endo Vice-Diretor José Geraldo Arantes de Azevedo Brito DEPARTAMENTO DE GEOLOGIA Chefe Luis Antônio Rosa Seixas iii EVOLUÇÃO CRUSTAL E RECURSOS NATURAIS iv CONTRIBUIÇÕES ÀS CIÊNCIAS DA TERRA - VOL. 349 TESE DE DOUTORAMENTO ARCHEAN EVOLUTION OF THE SOUTHERN SÃO FRANCISCO CRATON (SE BRAZIL) Capucine Albert Orientador Dr. Cristiano de Carvalho Lana Co-orientador Dr. Federico Farina Tese apresentada ao Programa de Pós-Graduação em Evolução Crustal e Recursos Naturais do Departamento de Geologia da Escola de Minas da Universidade Federal de Ouro Preto como requisito parcial à obtenção do Título de Doutor, Área de Concentração: Tectônica, Petrogênese e Recursos Minerais OURO PRETO 2017 v vii viii Acknowledgements Many people have contributed toward the realization of this project, bringing their geological knowledge, financial or logistic support and moral encouragements, and I have every person to acknowledge and thank for their contribution, whether small or big. Thank you! Cristiano, I am indebted to you for providing me with the opportunity to do research, and for all your support throughout the years. I am particularly grateful for your enthusiasm, your trust, and your availability. Thank you for the time and effort you dedicate to your students, providing us with the opportunity to be involved in scientific discussions, and for letting us follow our own research interests and ideas. -
Gold in Mali
Acta Montanistica Slovaca Ročník 4 (1999), 4, 311-318 Gold in Mali 1 Imrich Kušnír Zlato v Mali Článok sa, okrem stručného úvodu do geológie regiónu, zaoberá popisom hlavných zlatých ložísk Mali, kde sa t.č. ťaží viac ako 20 t zlata ročne. Súčasné objavy zlata v tejto Západoafrickej krajine sú totiž príkladom, ako orientácia geologického prieskumu územia s dobrým potenciálom pre určitú nerastnú surovinu a použitie vhodnej metódy môže viesť k úspechu. Zlato sa v Mali ťaží už od nepamäti, ale ekonomicky významné ložiská (s prepočítanými zásobami 50 až 240 ton Au), sú objavované len v poslednom období. Presnejšie odvtedy, odkedy sa prieskum sústredil na zóny proterozoických epimetamorfovaých vulkano-sedimentárnych hornín (tzv. Birrimian greenstone belts) Západoafrického kratónu, s použitím geochémie, ako jednej z hlavných prieskumných metód. Keď si prieskumári uvedomili, že "Birrimian" môže mať rovnaký potenciál na zlato ako archaické "greenstones", ktoré sú hlavným zdrojom zlata na svete a že geochémia môže byt účinnou metódou pre prieskum krajiny s plochým povrchom, bez východov hornín, ktorá je charakteristická pre väčšinu územia Mali (a celej Západnej a Strednej Afriky). Key words: Mali, West Africa, West African craton, Tuareg shield, Proterozoic, Birrimian, Pan-african orogeny, precambrian greenstones, gold, lode gold, auriferous tourmalinites. Introduction Gold mining in Mali has a long history. In 1433, its renowned emperor Kanku Mussa brought 8 tons of gold on his pilgrimage to Mecca. Local population has exploited gold since immemorial times. Nowadays, several thousands of "artisan" miners exploit numerous sites and their production is estimated at more than 2 tons of gold per year. Industrial mining began in the 1970's (Kalana mine), following a large exploration programme by SONAREM with the soviet assistance (Golder et al., 1965; Boltroukevitch, 1973).