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Evolution of the Western Avalon Zone and Related Epithermal Systems
Open File NFLD/3318 GEOLOGICAL ASSOCIATION OF CANADA NEWFOUNDLAND AND LABRADOR SECTION FALL FIELD TRIP FOR 2013 (September 27 to September 29) EVOLUTION OF THE WESTERN AVALON ZONE AND RELATED EPITHERMAL SYSTEMS Field Trip Guide and Background Material Greg Sparkes Geological Survey of Newfoundland and Labrador Department of Natural Resources PO Box 8700 St. John’s, NL, A1B 4J6 Canada September, 2013 GAC Newfoundland and Labrador Section – 2013 Fall Field Trip 2 Table of Contents SAFETY INFORMATION .......................................................................................................................... 4 General Information .................................................................................................................................. 4 Specific Hazards ....................................................................................................................................... 4 INTRODUCTION ........................................................................................................................................ 6 Regional Geology of the Western Avalon Zone ....................................................................................... 7 Epithermal-Style Mineralization: a summary ........................................................................................... 8 Trip Itinerary ........................................................................................................................................... 10 DAY ONE FIELD TRIP STOPS ............................................................................................................... -
New Siberian Islands Archipelago)
Detrital zircon ages and provenance of the Upper Paleozoic successions of Kotel’ny Island (New Siberian Islands archipelago) Victoria B. Ershova1,*, Andrei V. Prokopiev2, Andrei K. Khudoley1, Nikolay N. Sobolev3, and Eugeny O. Petrov3 1INSTITUTE OF EARTH SCIENCE, ST. PETERSBURG STATE UNIVERSITY, UNIVERSITETSKAYA NAB. 7/9, ST. PETERSBURG 199034, RUSSIA 2DIAMOND AND PRECIOUS METAL GEOLOGY INSTITUTE, SIBERIAN BRANCH, RUSSIAN ACADEMY OF SCIENCES, LENIN PROSPECT 39, YAKUTSK 677980, RUSSIA 3RUSSIAN GEOLOGICAL RESEARCH INSTITUTE (VSEGEI), SREDNIY PROSPECT 74, ST. PETERSBURG 199106, RUSSIA ABSTRACT Plate-tectonic models for the Paleozoic evolution of the Arctic are numerous and diverse. Our detrital zircon provenance study of Upper Paleozoic sandstones from Kotel’ny Island (New Siberian Island archipelago) provides new data on the provenance of clastic sediments and crustal affinity of the New Siberian Islands. Upper Devonian–Lower Carboniferous deposits yield detrital zircon populations that are consistent with the age of magmatic and metamorphic rocks within the Grenvillian-Sveconorwegian, Timanian, and Caledonian orogenic belts, but not with the Siberian craton. The Kolmogorov-Smirnov test reveals a strong similarity between detrital zircon populations within Devonian–Permian clastics of the New Siberian Islands, Wrangel Island (and possibly Chukotka), and the Severnaya Zemlya Archipelago. These results suggest that the New Siberian Islands, along with Wrangel Island and the Severnaya Zemlya Archipelago, were located along the northern margin of Laurentia-Baltica in the Late Devonian–Mississippian and possibly made up a single tectonic block. Detrital zircon populations from the Permian clastics record a dramatic shift to a Uralian provenance. The data and results presented here provide vital information to aid Paleozoic tectonic reconstructions of the Arctic region prior to opening of the Mesozoic oceanic basins. -
New Record of a Primitive Brachiopod Benthic Fauna from the North- East Coast of India
ISSN: 2347-3215 Volume 2 Number 3 (March-2014) pp. 70-73 www.ijcrar.com New record of a primitive brachiopod benthic fauna from the North- East coast of India S.Samanta1*, A.Choudhury2 and S.K.Chakraborty3 1Department of Zoology,Vidyasagar University Midnapore-721102, West Bengal, India 2S.D.Marine Biological Research Institute, Sagar Island, Sundarban, 24 Parganas(S)- 743373.West Bengal, India 3Faculty of Science, Department of Zoology, Vidyasagar University, Midnapore-721102, West Bengal, India *Corresponding author KEYWORDS A B S T R A C T The intertidal belt at the confluence of Subarnarekha estuary, a transboundary Brachiopoda; with Bay of Bengal is an example of physically stressed heterogeneous Lingula anatina; habitats possessing a number of mudflats and sand flats that support the lives Living fossil; of an assemblage of diversified macrobenthic fauna. The Brachiopods West Bengal; (Lampshells) make up a major macrobenthic faunal group in this area which Subarnarekha estuary. includes several morphotypes of Lingula anatina distributed in some restricted areas of the world. The morpho-anatomic study of Lingula anatina- a Precambrian living fossil as a new record from the eastern part of West Bengal has been undertaken in the present study. Introduction The intertidal belt of Midnapore coast, shelled marine animal. About 30000 especially the studied area supports species and 120 genera under the phylum diversified forms of macrobenthic fauna of brachiopoda have been described in a which include good number of fossil record which extends into the lower brachiopodans which has not been reported Cambrian period of which 300 or so earlier from West Bengal coast-Talsari species of brachiopods remain. -
Current Research A
Document généré le 30 sept. 2021 00:20 Atlantic Geology Current Research A. F. King Volume 6, numéro 1, april 1970 URI : https://id.erudit.org/iderudit/ageo06_1res01 Aller au sommaire du numéro Éditeur(s) Maritime Sediments Editorial Board ISSN 0843-5561 (imprimé) 1718-7885 (numérique) Découvrir la revue Citer ce document King, A. F. (1970). Current Research. Atlantic Geology, 6(1), 37–48. All rights reserved © Maritime Sediments, 1970 Ce document est protégé par la loi sur le droit d’auteur. L’utilisation des services d’Érudit (y compris la reproduction) est assujettie à sa politique d’utilisation que vous pouvez consulter en ligne. https://apropos.erudit.org/fr/usagers/politique-dutilisation/ Cet article est diffusé et préservé par Érudit. Érudit est un consortium interuniversitaire sans but lucratif composé de l’Université de Montréal, l’Université Laval et l’Université du Québec à Montréal. Il a pour mission la promotion et la valorisation de la recherche. https://www.erudit.org/fr/ 37 Current Research Current Research by Department of Geology, Memorial University of Newfoundland^ St. John's Newfoundland compiled by A.F. KING. Newfoundland offers the most complete and superbly exposed cross section through the Appalachian System... Also, Precambrian rocks of the Grenville and Nain Provinces and the Labrador Trough are only a few hours by air from St. John's. As shown in a compilation of research workers elsewhere in this volume, the great variety of geology within this region allows wide scope for research in stratigraphyt sedimentology,. paleontology, mineralogy,, petrology, structure, Quaternary geology, geophysics, economic geology and applied geophysics. -
A Template for an Improved Rock-Based Subdivision of the Pre-Cryogenian Timescale
Downloaded from http://jgs.lyellcollection.org/ by guest on September 28, 2021 Perspective Journal of the Geological Society Published Online First https://doi.org/10.1144/jgs2020-222 A template for an improved rock-based subdivision of the pre-Cryogenian timescale Graham A. Shields1*, Robin A. Strachan2, Susannah M. Porter3, Galen P. Halverson4, Francis A. Macdonald3, Kenneth A. Plumb5, Carlos J. de Alvarenga6, Dhiraj M. Banerjee7, Andrey Bekker8, Wouter Bleeker9, Alexander Brasier10, Partha P. Chakraborty7, Alan S. Collins11, Kent Condie12, Kaushik Das13, David A. D. Evans14, Richard Ernst15,16, Anthony E. Fallick17, Hartwig Frimmel18, Reinhardt Fuck6, Paul F. Hoffman19,20, Balz S. Kamber21, Anton B. Kuznetsov22, Ross N. Mitchell23, Daniel G. Poiré24, Simon W. Poulton25, Robert Riding26, Mukund Sharma27, Craig Storey2, Eva Stueeken28, Rosalie Tostevin29, Elizabeth Turner30, Shuhai Xiao31, Shuanhong Zhang32, Ying Zhou1 and Maoyan Zhu33 1 Department of Earth Sciences, University College London, London, UK 2 School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, UK 3 Department of Earth Science, University of California at Santa Barbara, Santa Barbara, CA, USA 4 Department of Earth and Planetary Sciences, McGill University, Montreal, Canada 5 Geoscience Australia (retired), Canberra, Australia 6 Instituto de Geociências, Universidade de Brasília, Brasilia, Brazil 7 Department of Geology, University of Delhi, Delhi, India 8 Department of Earth and Planetary Sciences, University of California, Riverside, -
Tectonic Regimes in the Baltic Shield During the Last 1200 Ma • a Review
Tectonic regimes in the Baltic Shield during the last 1200 Ma • A review Sven Åke Larsson ' ', Bva-L^na Tuliborq- 1 Department of Geology Chalmers University of Technology/Göteborij U^vjrsivy 2 Terralogica AB November 1993 TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW Sven Åke Larsson12, Eva-Lena Tullborg2 1 Department of Geology, Chalmers University of Technology/Göteborg University 2 Terralogica AB November 1993 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the author(s) and do not necessarily coincide with those of the client. Information on SKB technical reports from 1977-1978 (TR 121), 1979 (TR 79-28), 1980 (TR 80-26), 1981 (TR 81-17), 1982 (TR 82-28), 1983 (TR 83-77), 1984 (TR 85-01), 1985 (TR 85-20), 1986 (TR 86-31), 1987 (TR 87-33), 1988 (TR 88-32),. 1989 (TR 89-40), 1990 (TR 90-46), 1991 (TR 91-64) and 1992 (TR 92-46) is available through SKB. ) TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW by Sven Åke Larson and Eva-Lena Tullborg Department of Geology, Chalmers University of Technology / Göteborg University & Terralogica AB Gråbo, November, 1993 Keywords: Baltic shield, Tectonicregimes. Upper Protero/.oic, Phanerozoic, Mag- matism. Sedimentation. Erosion. Metamorphism, Continental drift. Stress regimes. , ABSTRACT 1 his report is a review about tectonic regimes in the Baltic (Fennoscandian) Shield from the Sveeonorwegian (1.2 Ga ago) to the present. It also covers what is known about palaeostress during this period, which was chosen to include both orogenic and anorogenic events. -
New Geochronological Constraints on the Timing of Magmatism for the Bull Arm Formation, Musgravetown Group, Avalon Terrane, Northeastern Newfoundland
Current Research (2017) Newfoundland and Labrador Department of Natural Resources Geological Survey, Report 17-1, pages 1-17 NEW GEOCHRONOLOGICAL CONSTRAINTS ON THE TIMING OF MAGMATISM FOR THE BULL ARM FORMATION, MUSGRAVETOWN GROUP, AVALON TERRANE, NORTHEASTERN NEWFOUNDLAND A.J. Mills, G.R. Dunning1, M. Murphy1 and A. Langille1 Regional Geology Section 1Department of Earth Sciences, Memorial University of Newfoundland, St. John’s, NL, A1B 3X5 ABSTRACT The Bull Arm Formation is one of the most areally extensive volcanic units in the Avalon Terrane of Newfoundland. His- torically, the age has been interpreted from the single previous U–Pb zircon age (570 +5/-3 Ma) obtained from a rhyolite flow on Wolf Island, where no contact relations are exposed. This rhyolite was later re-interpreted as the lower part of the overly- ing Rocky Harbour Formation but the initial interpretation as Bull Arm Formation had by then become entrenched in the lit- erature. New U–Pb zircon (CA-TIMS) geochronology results have been obtained for two rock samples from the volcanic-dom- inated Bull Arm Formation, Musgravetown Group, on the Bonavista Peninsula (Plate Cove volcanic belt) of northeastern Newfoundland, and one sample from the Isthmus that connects the Avalon Peninsula to the rest of the Island. A 40-cm-thick crystal-ash tuff near the base of the Plate Cove volcanic belt, at the roadcut east of Summerville, yielded an age of 592 ± 2.2 Ma. A lapilli tuff, located approximately 1800 m to the east, at the eastern margin of the volcanic belt, yielded an age of 591.3 ± 1.6 Ma. -
Ages of Detrital Zircons
Elsevier Editorial System(tm) for Precambrian Research Manuscript Draft Manuscript Number: Title: AGES OF DETRITAL ZIRCONS (U/Pb, LA-ICP-MS) FROM THE LATEST NEOPROTEROZOIC - MIDDLE CAMBRIAN(?) ASHA GROUP AND EARLY DEVONIAN TAKATY FORMATION, THE SOUTH- WESTERN URALS: A TEST OF AN AUSTRALIA-BALTICA CONNECTION WITHIN RODINIA Article Type: SI:Precambrian Supercontinents Keywords: Urals, Detrital Zircon, Rodinia, Ediacaran, Baltica Corresponding Author: Prof. Nikolay Borisovich Kuznetsov, Ph.D. Corresponding Author's Institution: Geological Institute of Russian Academy of Science First Author: Nikolay B Kuznetsov, Ph.D. Order of Authors: Nikolay B Kuznetsov, Ph.D.; Josef G Meert, Ph.D.; Tatiana V Romanyuk, Ph.D. Abstract: Results from U/Pb-dating of detrital zircons (dZr) from sandstones of the Basu and Kukkarauk Fms. (Asha Group) of Ediacaran-Middle Cambrian(?) age along with the results obtained from the Early Devonian Takaty Fm. are presented. The age of the Asha Group is traditionally labeled as Upper Vendian in the Russian stratigraphic chart that overlaps with the Ediacaran in the International stratigraphic chart. The dZr whose ages fall within the age-interval of (500-750 Ma) are common in the Basu and Kukkarauk Fm. These ages are typical for crystalline complexes in the Pre- Uralides-Timanides orogen. The identification of zircons with this age range agrees with commonly adopted interpretations for the depositional origin of the Asha Group as a molasse resulting from the erosion of that orogenic belt. Based on the estimates of the youngest ages of dZr along with the tentative identification of inarticulate brachiopods in the Kukkarauk Fm., it appears that the upper part of the Asha Group may extend into the Middle Cambrian. -
GAC - Newfoundland and Labrador Section Abstracts: 2019 Spring Technical Meeting
Document généré le 29 sept. 2021 11:15 Atlantic Geology Journal of the Atlantic Geoscience Society Revue de la Société Géoscientifique de l'Atlantique GAC - Newfoundland and Labrador Section Abstracts: 2019 Spring Technical Meeting Volume 55, 2019 URI : https://id.erudit.org/iderudit/1060421ar DOI : https://doi.org/10.4138/atlgeol.2019.007 Aller au sommaire du numéro Éditeur(s) Atlantic Geoscience Society ISSN 0843-5561 (imprimé) 1718-7885 (numérique) Découvrir la revue Citer ce document (2019). GAC - Newfoundland and Labrador Section Abstracts: 2019 Spring Technical Meeting. Atlantic Geology, 55, 243–250. https://doi.org/10.4138/atlgeol.2019.007 All Rights Reserved ©, 2019 Atlantic Geology Ce document est protégé par la loi sur le droit d’auteur. L’utilisation des services d’Érudit (y compris la reproduction) est assujettie à sa politique d’utilisation que vous pouvez consulter en ligne. https://apropos.erudit.org/fr/usagers/politique-dutilisation/ Cet article est diffusé et préservé par Érudit. Érudit est un consortium interuniversitaire sans but lucratif composé de l’Université de Montréal, l’Université Laval et l’Université du Québec à Montréal. Il a pour mission la promotion et la valorisation de la recherche. https://www.erudit.org/fr/ Geological Association of Canada, Newfoundland and Labrador Section ABSA TR CTS 2019 Spring Technical Meeting St. John’s, Newfoundland and Labrador The annual Spring Technical Meeting was held on February 18 and 19, 2019, in the Johnson GEO CENTRE on scenic Signal Hill in St. John’s, Newfoundland and Labrador. The meeting kicked-off Monday evening with a Public Lecture entitled “Meteors, Meteorites and Meteorwrongs of NL” by Garry Dymond from the Royal Astronomical Society of Canada. -
Retallack 2014 Newfoundland Ediacaran
Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Geological Society of America Bulletin Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J. Retallack Geological Society of America Bulletin 2014;126, no. 5-6;619-638 doi: 10.1130/B30892.1 Email alerting services click www.gsapubs.org/cgi/alerts to receive free e-mail alerts when new articles cite this article Subscribe click www.gsapubs.org/subscriptions/ to subscribe to Geological Society of America Bulletin Permission request click http://www.geosociety.org/pubs/copyrt.htm#gsa to contact GSA Copyright not claimed on content prepared wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms to further education and science. This file may not be posted to any Web site, but authors may post the abstracts only of their articles on their own or their organization's Web site providing the posting includes a reference to the article's full citation. GSA provides this and other forums for the presentation of diverse opinions and positions by scientists worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society. Notes © 2014 Geological Society of America Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J. -
On the History of the Names Lingula, Anatina, and on the Confusion of the Forms Assigned Them Among the Brachiopoda Christian Emig
On the history of the names Lingula, anatina, and on the confusion of the forms assigned them among the Brachiopoda Christian Emig To cite this version: Christian Emig. On the history of the names Lingula, anatina, and on the confusion of the forms assigned them among the Brachiopoda. Carnets de Geologie, Carnets de Geologie, 2008, CG2008 (A08), pp.1-13. <hal-00346356> HAL Id: hal-00346356 https://hal.archives-ouvertes.fr/hal-00346356 Submitted on 11 Dec 2008 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Carnets de Géologie / Notebooks on Geology - Article 2008/08 (CG2008_A08) On the history of the names Lingula, anatina, and on the confusion of the forms assigned them among the Brachiopoda 1 Christian C. EMIG Abstract: The first descriptions of Lingula were made from then extant specimens by three famous French scientists: BRUGUIÈRE, CUVIER, and LAMARCK. The genus Lingula was created in 1791 (not 1797) by BRUGUIÈRE and in 1801 LAMARCK named the first species L. anatina, which was then studied by CUVIER (1802). In 1812 the first fossil lingulids were discovered in the Mesozoic and Palaeozoic strata of the U.K. -
Limestone Resources of Newfoundland and Labrador
PROVINCE OF NEWFOUNDLAND AND LABRADOR DEPARTMENT OF MINES AND ENERGY MINERAL DEVELOPMENT DIVISION REPORT 74-2 LIMESTONE RESOURCES OF NEWFOUNDLAND AND LABRADOR by JOHN R. DeGRACE ST. JOHN’S, NEWFOUNDLAND 1974 CLICK HERE TO VIEW THE TABLE OF CONTENTS Accompanying maps Map 1, Map 2 and Map 3 can be viewed by clicking on each map number PUBLISHER'S NOTE Report 74-2, Limestone Resources of Newfoundland and Labrador by John R. DeGrace, being the only comprehensive study of the limestone resources of the province to date, is being reissued to provide the nec- essary background information to facilitate limestone exploration activities in the province. However, the format of the reissue has been changed from the original to conform to the format presently used by the Geological Survey. The report is being reprinted in its entirety without any updating or corrections whatso- ever; and is being made available only digitally, including on the web. Readers should be aware that later reviews of the geology of the areas covered in Report 74-2 are those by Hibbard (1983), King (1988), Knight and James (1988), Smyth and Schillereff (1982), Stouge (1983a,b), and Knight (1983). Details concerning the economic potential of the limestone resources themselves, also have been updated in the interim. The Newfoundland Department of Mines and Energy began a reassess- ment of Newfoundland marble resources in 1985, the objective of which was to determine their industrial potential as filler and dimension stone. Significant reassessments of some of the old deposits were made and new deposits of high-purity, white marble were delineated by diamond drilling.