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Detrital Zircon Geochronology of Palaeozoic Siliciclastic Rocks from the Ellsworth Mountains, West Antarctica
O EOL GIC G A D D A E D C E I H C I L E O S F u n 2 d 6 la serena octubre 2015 ada en 19 Detrital zircon geochronology of Palaeozoic siliciclastic rocks from the Ellsworth Mountains, West Antarctica Paula Castillo* and C. Mark Fanning Research School of Earth Sciences, The Australian National University, Canberra, Australia. Rodrigo Fernández University of Texas Institute for Geophysics, The University of Texas at Austin, Austin, Texas, USA. Fernando Poblete Geosciences Rennes, Université de Rennes 1, Rennes, France. Departamento de Geología, Universidad de Chile, Santiago, Chile. *Contact email: [email protected] Abstract. In the Ellsworth Mountains there is an extensive record of sedimentation from early Cambrian to Permian times. However, the tectonic history and the palaeogeographic significance remain enigmatic. Nine sandstone samples were analysed for their U-Pb detrital zircon age spectra using SHRIMPII and RG. They belong to the early Cambrian to Carboniferous-Permian sequences and record typical Gondwana margin signatures. Variations up section/sequence in zircon provenance suggest restricted basinal deposition during the Cambrian,! with likely sources in the Namaqua-Natal and Mozambique/Maud Belts. There are little or no contributions from older cratons and so the Ellsworth basin evolved as a separate basin to that in the Transantarctic Mountains.! This basin configuration changed after the Devonian and deposition continued Figure 1. Reconstruction of part of Gondwana at ca. 500 Ma. during the late Palaeozoic, when the Ellsworth Mountains South America: SFC - Sao Francisco craton; PPC - basin only received detritus from the Ross/Pan-African Paranapanema craton; RPC - Río de la Plata craton. -
Review of the Geology and Paleontology of the Ellsworth Mountains, Antarctica
U.S. Geological Survey and The National Academies; USGS OF-2007-1047, Short Research Paper 107; doi:10.3133/of2007-1047.srp107 Review of the geology and paleontology of the Ellsworth Mountains, Antarctica G.F. Webers¹ and J.F. Splettstoesser² ¹Department of Geology, Macalester College, St. Paul, MN 55108, USA ([email protected]) ²P.O. Box 515, Waconia, MN 55387, USA ([email protected]) Abstract The geology of the Ellsworth Mountains has become known in detail only within the past 40-45 years, and the wealth of paleontologic information within the past 25 years. The mountains are an anomaly, structurally speaking, occurring at right angles to the Transantarctic Mountains, implying a crustal plate rotation to reach the present location. Paleontologic affinities with other parts of Gondwanaland are evident, with nearly 150 fossil species ranging in age from Early Cambrian to Permian, with the majority from the Heritage Range. Trilobites and mollusks comprise most of the fauna discovered and identified, including many new genera and species. A Glossopteris flora of Permian age provides a comparison with other Gondwana floras of similar age. The quartzitic rocks that form much of the Sentinel Range have been sculpted by glacial erosion into spectacular alpine topography, resulting in eight of the highest peaks in Antarctica. Citation: Webers, G.F., and J.F. Splettstoesser (2007), Review of the geology and paleontology of the Ellsworth Mountains, Antarctica, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond et al., USGS Open- File Report 2007-1047, Short Research Paper 107, 5 p.; doi:10.3133/of2007-1047.srp107 Introduction The Ellsworth Mountains are located in West Antarctica (Figure 1) with dimensions of approximately 350 km long and 80 km wide. -
Layering of Surface Snow and Firn at Kohnen Station, Antarctica – Noise Or Seasonal Signal?
View metadata, citation and similar papers at core.ac.uk brought to you by CORE Confidential manuscript submitted to replace this text with name of AGU journalprovided by Electronic Publication Information Center Layering of surface snow and firn at Kohnen Station, Antarctica – noise or seasonal signal? Thomas Laepple1, Maria Hörhold2,3, Thomas Münch1,5, Johannes Freitag4, Anna Wegner4, Sepp Kipfstuhl4 1Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A43, 14473 Potsdam, Germany 2Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen 3now at Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany 4Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany 5Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany Corresponding author: Thomas Laepple ([email protected]) Extensive dataset of vertical and horizontal firn density variations at EDML, Antarctica Even in low accumulation regions, the density in the upper firn exhibits a seasonal cycle Strong stratigraphic noise masks the seasonal cycle when analyzing single firn cores Abstract The density of firn is an important property for monitoring and modeling the ice sheet as well as to model the pore close-off and thus to interpret ice core-based greenhouse gas records. One feature, which is still in debate, is the potential existence of an annual cycle of firn density in low-accumulation regions. Several studies describe or assume seasonally successive density layers, horizontally evenly distributed, as seen in radar data. -
Memoria Antártica Nacional Campaña Antártica 2014-2015 Santiago Diciembre De 2015 Presentación Del Ministro De Relaciones Exteriores
Memoria Antártica Nacional Campaña Antártica 2014-2015 Santiago Diciembre de 2015 Presentación del Ministro de Relaciones Exteriores Sr. Heraldo Muñoz Valenzuela El 16 de diciembre de 2014, el Consejo de Política Antártica, que tengo el honor de presidir, reunido en Punta Arenas, entregó un mandato a las instituciones antárticas nacionales para la elaboración de una Memoria Antártica Nacional. El documento que presentamos, compilación inédita de las tareas que se desarrollan anualmente en ese continente, da cumplimiento a dicho mandato. El quehacer antártico nacional involucra a un amplio espectro de instituciones, las que destinan personas y recursos a la ejecución de las tareas que nuestra legislación les confiere. Cada una de estas entidades cumple un papel fundamental en el logro de los objetivos establecidos en la Política Antártica Nacional, documento rector de nuestros trabajos. El Ministerio de Relaciones Exteriores, en su rol de coordinador de la Política Antártica Nacional, ha enfatizado la difusión hacia la ciudadanía de la labor que las instituciones nacionales realizan en ese continente. Junto con describir de manera general las perspectivas que se abren para los intereses nacionales en este ámbito, este documento resalta los profundos vínculos históricos, geográficos y políticos que desde los inicios de nuestra historia patria nos unen con la Antártica. Al presentar esta primera Memoria Anual, es oportuno recordar el destacado papel de Chile durante las negociaciones del Tratado Antártico, instrumento internacional que cumplirá 55 años de vigencia en 2016, a través de sus delegados Marcial Mora, Enrique Gallardo y Julio Escudero; así como durante la evolución de las cuestiones antárticas en el ámbito multilateral, gracias a figuras como Oscar Pinochet de la Barra y Jorge Berguño. -
Station Sharing in Antarctica
IP 94 Agenda Item: ATCM 7, ATCM 10, ATCM 11, ATCM 14, CEP 5, CEP 6b, CEP 9 Presented by: ASOC Original: English Station Sharing in Antarctica 1 IP 94 Station Sharing in Antarctica Information Paper Submitted by ASOC to the XXIX ATCM (CEP Agenda Items 5, 6 and 9, ATCM Agenda Items 7, 10, 11 and 14) I. Introduction and overview As of 2005 there were at least 45 permanent stations in the Antarctic being operated by 18 countries, of which 37 were used as year-round stations.i Although there are a few examples of states sharing scientific facilities (see Appendix 1), for the most part the practice of individual states building and operating their own facilities, under their own flags, persists. This seems to be rooted in the idea that in order to become a full Antarctic Treaty Consultative Party (ATCP), one has to build a station to show seriousness of scientific purpose, although formally the ATCPs have clarified that this is not the case. The scientific mission and international scientific cooperation is nominally at the heart of the ATS,ii and through SCAR the region has a long-established scientific coordination body. It therefore seems surprising that half a century after the adoption of this remarkable Antarctic regime, we still see no truly international stations. The ‘national sovereign approach’ continues to be the principal driver of new stations. Because new stations are likely to involve relatively large impacts in areas that most likely to be near pristine, ASOC submits that this approach should be changed. In considering environmental impact analyses of proposed new station construction, the Committee on Environmental Protection (CEP) presently does not have a mandate to take into account opportunities for sharing facilities (as an alternative that would reduce impacts). -
World Cruise
EXTEND YOUR JOURNEY BEFORE OR AFTER YOUR CRUISE 2019 WORLD CRUISE Join us for the journey of a lifetime PRE: MIAMI, USA – FROM $1,069 PER PERSON POST: LONDON, ENGLAND – FROM $1,339 PER PERSON INCLUDES: INCLUDES: • 2 nights in Miami at the Loews Miami Beach Hotel (or similar) • 2 nights in London at the Conrad London St. James (or similar) • Meals: 2 breakfasts • Meals: 2 breakfasts and 1 lunch • Bon Voyage Wine and Cheese Reception • Farewell Wine and Cheese Reception • Guided City Tour • Guided City Tour • Services of a Viking Host • Services of a Viking Host • All transfers • All transfers See vikingcruises.com.au/oceans for details. NO KIDS | NO CASINOS | VOTED WORLD’S BEST 138 747 VIKINGCRUISES.COM.AU OR SEE YOUR LOCAL TRAVEL AGENT VIK0659 Brochure_World_Cruise_8pp_A4(A3)_VIK0659.indd 1 23/8/17 16:52 ENGLAND London (Greenwich) Vigo SPAIN USA Casablanca MOROCCO Pacific Miami Santa Cruz de Tenerife Ocean Atlantic Canary Islands Ocean SPAIN San Juan Dakar PUERTO RICO SENEGAL International Date Line St. George’s GRENADA Îles du Salut FRENCH GUIANA FRENCH POLYNESIA BRAZIL MADAGASCAR Recife Bora Bora (Vaitape) Salvador de Bahia Atlantic NAMIBIA Fort Dauphin Easter Island Ocean CHILE Armação dos Búzios MOZAMBIQUE Tahiti (Papeete) Santiago Rio de Janeiro Walvis Bay (Valparaíso) Maputo Perth AUSTRALIA FRENCH CHILE URUGUAY Lüderitz Port Louis Bay of Islands MAURITIUS (Freemantle) POLYNESIA Durban (Russell) Robinson Crusoe Montevideo Adelaide Sydney East London Auckland Island Buenos Aires Cape Town Port Elizabeth Indian Milford CHILE Melbourne -
Chile En La Antártica
MAGÍSTER EN POLÍTICA EXTERIOR CHILE EN LA ANTÁRTICA: NUEVOS DESAFÍOS Y PERSPECTIVAS CHILE José Javier Gorostegui Obanoz - Rodrigo Waghorn Gallegos El programa es impartido por el Instituto de Estudios Avanzados y el Departamento de EN LA Abordando aspectos específicos sobre la acción de nuestro país en el banoz Historia de la Facultad de Humanidades de continente antártico, las dos investigaciones aquí reunidas confieren una O la USACH y busca preparar especialistas excelente oportunidad para apreciar y analizar con detenimiento los elementos con enfoque interdisciplinario en el área que caracterizan la política antártica nacional, así como sus potencialidades y ANTÁRTICA de relaciones internacionales con la idea desafíos en el ámbito político, geográfico y jurídico. Mientras, por una parte, de formular propuestas concretas en José Javier Gorostegui nos plantea el terreno de la aplicación del Derecho del materia de política exterior. Con los años, Nuevos Desafíos Mar y sus implicancias para los intereses y derechos antárticos considerando este programa se ha constituido en un a distintos actores, por otra, Rodrigo Waghorn nos detalla y contextualiza y Perspectivas referente de excelencia en la investigación la amplia estructura organizacional y de gestión pública que implica una y posgrado en Ciencias Sociales y, en permanente renovación de ideas y objetivos para la presencia efectiva de particular, en los estudios internacionales. Los autores en La Haya, 2012 Chile en la Antártica. Gallegos Rodrigo Waghorn Este programa cuenta con el -
Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs CONSULTANT REPORT
Merrimack Station AR-1167 CALIFORNIA ENERGY COMMISSION Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs CONSULTANT REPORT February 2002 500-02-079F Gray Davis, Governor CALIFORNIA ENERGY COMMISSION Prepared By: Electric Power Research Institute Prepared For: California Energy Commission Kelly Birkinshaw PIER Program Area Lead Marwan Masri Deputy Director Technology Systems Division Robert L. Therkelsen Executive Director PIER / EPRI TECHNICAL REPORT Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs This report was prepared as the result of work sponsored by the California Energy Commission. It does not necessarily represent the views of the Energy Commission, its employees or the State of California. The Energy Commission, the State of California, its employees, contractors and subcontractors make no warrant, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the uses of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the California Energy Commission, nor has the California Energy Commission passed upon the accuracy or adequacy of the information in this report. Comparison of Alternate Cooling Technologies for California Power Plants Economic, Environmental and Other Tradeoffs Final Report, February 2002 Cosponsor California Energy Commission 1516 9th Street Sacramento, CA 95814-5504 Project Managers Matthew S. Layton, Joseph O’Hagan EPRI Project Manager K. Zammit EPRI • 3412 Hillview Avenue, Palo Alto, California 94304 • PO Box 10412, Palo Alto, California 94303 • USA 800.313.3774 • 650.855.2121 • [email protected] • www.epri.com DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITIES THIS DOCUMENT WAS PREPARED BY THE ORGANIZATION(S) NAMED BELOW AS AN ACCOUNT OF WORK SPONSORED OR COSPONSORED BY THE ELECTRIC POWER RESEARCH INSTITUTE, INC. -
Disclosure Guide
WEEKS® 2021 - 2022 DISCLOSURE GUIDE This publication contains information that indicates resorts participating in, and explains the terms, conditions, and the use of, the RCI Weeks Exchange Program operated by RCI, LLC. You are urged to read it carefully. 0490-2021 RCI, TRC 2021-2022 Annual Disclosure Guide Covers.indd 5 5/20/21 10:34 AM DISCLOSURE GUIDE TO THE RCI WEEKS Fiona G. Downing EXCHANGE PROGRAM Senior Vice President 14 Sylvan Way, Parsippany, NJ 07054 This Disclosure Guide to the RCI Weeks Exchange Program (“Disclosure Guide”) explains the RCI Weeks Elizabeth Dreyer Exchange Program offered to Vacation Owners by RCI, Senior Vice President, Chief Accounting Officer, and LLC (“RCI”). Vacation Owners should carefully review Manager this information to ensure full understanding of the 6277 Sea Harbor Drive, Orlando, FL 32821 terms, conditions, operation and use of the RCI Weeks Exchange Program. Note: Unless otherwise stated Julia A. Frey herein, capitalized terms in this Disclosure Guide have the Assistant Secretary same meaning as those in the Terms and Conditions of 6277 Sea Harbor Drive, Orlando, FL 32821 RCI Weeks Subscribing Membership, which are made a part of this document. Brian Gray Vice President RCI is the owner and operator of the RCI Weeks 6277 Sea Harbor Drive, Orlando, FL 32821 Exchange Program. No government agency has approved the merits of this exchange program. Gary Green Senior Vice President RCI is a Delaware limited liability company (registered as 6277 Sea Harbor Drive, Orlando, FL 32821 Resort Condominiums -
Antarctic Primer
Antarctic Primer By Nigel Sitwell, Tom Ritchie & Gary Miller By Nigel Sitwell, Tom Ritchie & Gary Miller Designed by: Olivia Young, Aurora Expeditions October 2018 Cover image © I.Tortosa Morgan Suite 12, Level 2 35 Buckingham Street Surry Hills, Sydney NSW 2010, Australia To anyone who goes to the Antarctic, there is a tremendous appeal, an unparalleled combination of grandeur, beauty, vastness, loneliness, and malevolence —all of which sound terribly melodramatic — but which truly convey the actual feeling of Antarctica. Where else in the world are all of these descriptions really true? —Captain T.L.M. Sunter, ‘The Antarctic Century Newsletter ANTARCTIC PRIMER 2018 | 3 CONTENTS I. CONSERVING ANTARCTICA Guidance for Visitors to the Antarctic Antarctica’s Historic Heritage South Georgia Biosecurity II. THE PHYSICAL ENVIRONMENT Antarctica The Southern Ocean The Continent Climate Atmospheric Phenomena The Ozone Hole Climate Change Sea Ice The Antarctic Ice Cap Icebergs A Short Glossary of Ice Terms III. THE BIOLOGICAL ENVIRONMENT Life in Antarctica Adapting to the Cold The Kingdom of Krill IV. THE WILDLIFE Antarctic Squids Antarctic Fishes Antarctic Birds Antarctic Seals Antarctic Whales 4 AURORA EXPEDITIONS | Pioneering expedition travel to the heart of nature. CONTENTS V. EXPLORERS AND SCIENTISTS The Exploration of Antarctica The Antarctic Treaty VI. PLACES YOU MAY VISIT South Shetland Islands Antarctic Peninsula Weddell Sea South Orkney Islands South Georgia The Falkland Islands South Sandwich Islands The Historic Ross Sea Sector Commonwealth Bay VII. FURTHER READING VIII. WILDLIFE CHECKLISTS ANTARCTIC PRIMER 2018 | 5 Adélie penguins in the Antarctic Peninsula I. CONSERVING ANTARCTICA Antarctica is the largest wilderness area on earth, a place that must be preserved in its present, virtually pristine state. -
Antártica Chilena Province Magallanes and Antártica Chilena Region
ANTÁRTICA CHILENA PROVINCE Magallanes and AntÁrtica Chilena Region Antártica AN ANTARCTICA BIOLOGICAL WITH FORESTS? DIVERSITY The last continent on Earth to be destinations, with landmarks such For most of its history, Antarctica was Thanks to complex interactions, the discovered. as the Russian Orthodox Church of a green continent, full of life, similar vast majority of animal and plant the Holy Trinity and the Monument to what one sees today in southern species are only able to survive on The Antártica Chilena is located about to the Antarctic Treaty. Chile. Warm temperatures were the edges of the southern continent, 1,000 km south of Punta Arenas and BASES FOR AN ICY CONTINENT. the result of a natural greenhouse where they have access to ice-free covers an area of 1,250,000 km², with The differing purposes and needs of phenomenon. However, about 28 land, the nutrients provided by the a very fragmented coastline. Chilean researchers and visitors mean that million years ago, the continent sea, and access to migration routes OTHER DOLPHINS. Hourglass sovereignty in Antarctica is ensured each base established in Antarctica began to become isolated and cool to warmer areas. As a result, many of dolphin, southern right whale by the existence of numerous bases has unique sizes and characteristics, down. First, in the inner mountains, these organisms coexist in relatively dolphin, spectacled porpoise, and shelters, where families are both in terms of infrastructure and then in the valleys and coasts, until small spaces, which sometimes sperm whale, and beaked whales. dedicated to scientific research live. accommodation and in terms of the trees could no longer survive. -
Nsf.Gov OPP: Report of the U.S. Antarctic Program Blue Ribbon
EXECUTIVE SUMMARY MORE AND BETTER SCIENCE IN ANTARCTICA THROUGH INCREASED A LOGISTICAL EFFECTIVENESS Report of the U.S. Antarctic Program Blue Ribbon Panel Washington, D.C. July 23, 2012 This booklet summarizes the report of the U.S. Antarctic Program Blue Ribbon Panel, More and Better Science in Antarctica Through Increased Logistical Effectiveness. The report was completed at the request of the White House office of science and Technology Policy and the National Science Foundation. Copies of the full report may be obtained from David Friscic at [email protected] (phone: 703-292-8030). An electronic copy of the report may be downloaded from http://www.nsf.gov/ od/opp/usap_special_review/usap_brp/rpt/index.jsp. Cover art by Zina Deretsky. Front and back inside covers showing McMurdo’s Dry Valleys in Antarctica provided by Craig Dorman. CONTENTS Introduction ............................................ 1 The Panel ............................................... 2 Overall Assessment ................................. 3 U.S. Facilities in Antarctica ....................... 4 The Environmental Challenge .................... 7 Uncertainties in Logistics Planning ............. 8 Activities of Other Nations ....................... 9 Economic Considerations ....................... 10 Major Issues ......................................... 11 Single-Point Failure Modes ..................... 17 Recommendations ................................. 18 Concluding Observations ....................... 21 U.S. ANTARCTIC PROGRAM BLUE RIBBON PANEL WASHINGTON,