DOCSLIB.ORG

Structural Studies in the Scotia Arc: Isla De Los Estados, Argentina

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Structural Studies in the Scotia Arc: Isla De Los Estados, Argentina Structural studies in the Scotia Arc: Dr. Horacio J. Harrington on an Argentine expedi- tion 30 years ago. Harringtons work (1943) showed Isla de los Estados, Argentina the island to consist almost entirely of probable Upper R/V Hero Cruise 72-2 Jurassic acidic volcanic rocks comparable to those of the Serie Tobifera (or Serie Porphyritica) that crops IAN W. D. DALZIEL out extensively in the Andean Cordillera. The north- Lamont-Doherty Geological Observatory ernmost part of Isla de los Estados (including the Columbia University offshore islets) Harrington found to consist of black shales and other sedimentary rocks of supposed Lower The objective of R/V Hero Cruise 72-2 was to Cretaceous age (fig. 1). study the geology of Isla de los Estados, Argentina, and adjacent areas of Isla Grande, the main island of The scientists participating in the present work Tierra del Fuego. The cruise formed part of a con- were: Ian Daiziel and Keith Palmer of Lamont- tinuing study of the tectonics of the Scotia Arc under Doherty Geological Observatory, Roberto Caminos National Science Foundation grant GV-19541 (Dal- and Francisco Nollo of the Direccion Nacional de ziel, 1969, 1970, 1971a and b; Daiziel et al., 1970; Geologia y Mineria, Buenos Aires, and Riccardo Palmer and Daiziel, in press), and was undertaken Casanova of the Departamento de Geologia, Univer- jointly with Argentine scientists. sidad de Buenos Aires. The vessel sailed from Punta Isla de los Estados is situated on the northern limb Arenas, Chile, on April 25, 1972, and returned to of the Scotia Arc off the eastern tip of Isla Grande (fig. 1) and is the termination of the Andean Cordil- lera. The island trends east-west. It is approximately 60 kilometers long, up to 20 kilometers wide. It is $ extremely rugged, and the coastline is deeply indented A1 by numerous fjords (fig. 2). Accounts of the topog- 4f raphy, history of exploration, plants and animals can k be found in the reports of R/V Hero Cruises 71-2 and 71-5 (Flint, 1971; Imshaug, 1972). s 2 Apart from collections made on early voyages ¶. (Hyades, 1887), previous knowledge of the geology of Isla de los Estados is entirely due to the work of Dr. Dalziel was senior scientist, Cruise 72-2. .y,.. 660 I. 64 Figure 2 (above). The mountainous interior of Isla de los Estados, consisting entirely of massive A PLANT/C OCEA N volcanic rocks of probable Late Jurassic age. 540 30 - . 1 .k TIERA DEL FUEGO Vp !.} SLA D( LOS ESTADOS Figure 1 (left). Easternmost Isla Granda (Tierra del Fuego) and DRAKE Isla de los Estados. Areas of outcrop of volcanic rocks are PASSAGE shown in black. Landing sites on Isla Grande are shown as black 0 40 dots. l—Isla Observatorio. KMS 66o 65 4. September-October 1972 151 Rio Gallegos, Argentina, on June 1, 1972. Twenty- References nine days were spent working on Isla de los Estados Daiziel, I. W. D. 1969. Structural studies in the Scotia and four at the eastern end of Isla Grande in an at- Arc: Livingston Island. Antarctic Journal of the U.S., tempt to correlate the lithic units and geologic struc- IV(4): 137. ture across the Strait of Le Maire. Daiziel, I. W. D. 1970. Structural studies in the Scotia Arc: the Patagonian and Fuegian Andes. Antarctic Journal of Over 200 landings were made around the coast of the U.S., V(4): 99-100. Isla de los Estados and on Isla Observatorio to the Daiziel, I. W. D. 1971a. Structural studies in the Scotia Arc: Canal Beagle, Tierra del Fuego. Antarctic Journal north (fig. 1). Extensive collecting was undertaken, of the U.S.,VI(4): 122-124. and lithologic and structural maps were prepared. A Dalziel, I. W. D. 1971b. Structural studies in the Scotia joint preliminary scientific report will be published Arc: the South Orkney Islands. RJV Hero Cruise 71-1. in the near future. Antarctic Journal of the U.S., VI(4): 124-126. Daiziel, I. W. D., Price, D. J . and Stirewalt, G. 1970. Struc- Thanks are due to numerous individuals in Argen- tural studies in the Scotia Arc: Elephant Island, Gibbs tina for their help in making arrangements for the Island, Hope Bay, and Livingston Island. Antarctic Journal cruise, notably Dr. R. Muller, Director Nacional de of the U.S.,V(4): 100-101. Imshaug, Henry A. 1972. K/V Hero Cruise 71-5 to Isla de Geologia y Mineria, Professors H. Harrington, J . Tur- los Estados. Antarctic Journal of the U.S., VII (2): 42-44. ner, and D. Valencio of the Universidad de Buenos Flint, 0. S. 1971. R/V Hero Cruise 71-2 to Isla de los Aires, Dr. N. Fourcade of the Instituto Antartico Estados. Antarctic Journal of the U.S., VI (6): 263-265. Argentino, Dr. A. Lonardi of the Instituto Oceano- Harrington, H. J . 1943. Observaciones geologicas en la Isla de los Estados. An. Mus. Arg. Cien. Nat., Geol. Publ. 29, graphico Argentino, and Mr. M. B. Kratzer, scientific p. 29-52. attaché at the U.S. Embassy. Hyades, J. 1887. Mission scientifique du Cap Horn (1882- 1883). Geologie, Paris, IV, 242 p. The enthusiasm and skill with which Captain Pieter Palmer, K. F., and Daiziel, I. W. D. In press. Structural Lenie operated his vessel in uncharted waters con- studies in the Scotia Arc: Andean Cordillera, Tierra del tributed immeasurably to the success of the cruise. Fuego. Antarctic Journal of the U.S., VII (1). Petrology of Deception Island volcano C.I.P.W. norms have been computer calculated. In- terpretation of these data indicates that Deception CHARLES H. SHULTZ rocks belong to the oceanic basalt-trachyte associa- Department of Geology tion, although the match is imperfect. The parent Slippery Rock State College magma is probably similar to Kunos low-potassium, high-aluminum basalt (Kuno, 1960). Chemical vari- Two years have passed since the August 1970 vol- ations of recent pyroclastics were probably caused by canic eruption at Deception Island. Perhaps, con- liquid-crystal fractionation related to the separation trary to my expectations, this most recent eruptive of diopsidic augite and titaniferous magnetite. cycle has come to an end. Assuming this to be the Very welcome support of the project has been lent case, field work on the project is essentially complete. by Prof. Bernard M. Gunn of the University of During the past year I have continued to evaluate Montreal. Prof. Gunn has been investigating low- field observations, petrographic data, and chemical potassium andesites and tholeiites of oceanic islands analysis. I have concentrated my petrographic work worldwide. He is currently analyzing my materials, on the pre-1967 pyroclastics, tuffs, and breccias, including the oldest rocks on the island, for such trace which have never been investigated satisfactorily. elements as chromium, nickel, cobalt, barium, zinc, Universal stage work on rock samples that have been copper, strontium, and rubidium. On the basis of chemically analyzed is continuing. I was fortunate preliminary results he has concluded that Deception in receiving a generous sample of the volcanic ash rocks and pyroclastics are primarily ". low-potas- and dust that fell on the Soviet Bellingauzen Station sium basaltic andesite typical of island arcs" (personal shortly after the eruption of August 12, 1970. Petro- communication). graphically, this material compares favorably with During the past year I presented a paper on the mechanically analyzed tephra collected on Deception volcanology and petrology of the recent eruptions Island. (Shultz, 1971) and published a paper giving details Much of my effort has been concentrated on eval- of the 1970 eruptions (Shultz, in press). uation of the chemistry of recent pyroclastics and the This work was supported by National Science relationship of the island to other volcanoes of the Foundation grant GA-4146 to The Ohio State Uni- world. The chemical data have been normalized, and sity. 152 ANTARCTIC JOURNAL.
Load more

Recommended publications
  • Así Nació Ushuaia. Orígenes De La Ciudad Más Austral Del Mundo1
    Dossier. Reflexiones en torno a los estudios sobre Territorios Nacionales Así nació Ushuaia. Orígenes de la ciudad más austral del mundo1 Aroldo Canclini** LA VIDA EN EL FIN DEL MUNDO (1869-1884) Aunque en Ushuaia la vida tenía mucho de rutinario, la forma en que transcurrían las cosas en la población más austral del mundo merece ser consignada brevemente. Los recuerdos de los hijos de los misioneros -Lucas Bridges en su hermoso libro y su hermano Guillermo oralmente- son coincidentes y demuestran cómo quedaron marcados por aquella experiencia. El horario cotidiano cambió varias veces durante los años, pero podemos dar como ejemplo el que regía para el verano de 1876. Todos se levantaban a las cinco menos veinte y, antes de desayunarse a las seis, los misioneros dedicaban un rato a la lectura de la Biblia y a la oración en conjunto. A la hora citada, tocaba una campana para llamar a los indígenas quienes, luego de comer, se dedicaban a sus trabajos. Algunos cuidaban las cabras y vacas que se utilizaban para el consumo y otros cultivaban las huertas que todos tenían detrás de su casita. En algunas ocasiones, se construían cercos o caminos, por ejemplo desde la iglesia hasta la playa. De nueve a diez, se celebraba un culto para implorar la bendición divina durante el día y luego se daba alguna enseñanza a los hombres y mujeres, que después volvían a su trabajo. A la una de la tarde otra campana llamaba a almorzar y de dos a cinco y media se trabajaba nuevamente. Los sábados a la tarde y los domingos eran días de descanso.
    [Show full text]
  • Malvinas Y El Mundo: Registros Portuarios Históricos De Las Islas (1826-1832 Y 1842-1914)
    Malvinas y el mundo: registros portuarios históricos de las islas (1826-1832 y 1842-1914) [Sofía Clara Haller] prohistoria año XXIII, núm. 34 - dic. 2020 Prohistoria, Año XXIII, núm. 34, dic. 2020, ISSN 1851-9504 Malvinas y el mundo: registros portuarios históricos de las islas (1826-1832 y 1842-1914)* Malvinas and the World: Historical Shipping Registers of the Islands (1826- 1832 and 1842-1914) SOFÍA CLARA HALLER Resumen Abstract Los registros históricos de entradas y salidas de The historical shipping records of the Malvinas navíos de la costa malvinense permiten explorar Islands coasts allow us to explore the maritime las conexiones navieras del archipiélago entre connections that the archipelago had between 1826 y 1914. La reconstrucción de dichas 1826 and 1914. The reconstruction of such conexiones integrada con información connections, integrated with heterogeneous heterogénea proveniente de distintos information from different archives and repositorios documentales y de bases de datos databases of historical voyages, makes it de viajes históricos, hace posible visibilizar las possible to identify the activities and needs that actividades y necesidades que convocaban a los barcos a las islas Malvinas, los distintos actores brought ships to the Malvinas Islands, the que formaron parte de su historia, el cambio de different actors that were part of their history, las relaciones marítimas de las islas antes y the change in the maritime relation before and después de la ocupación británica de 1833 y las after the British occupation of 1833, and the conexiones internacionales del archipiélago con international connections of the archipelago puntos de la Patagonia continental y el estrecho with different points in continental Patagonia de Magallanes.
    [Show full text]
  • Isla De Los Estados Su Patrimonio Natural Y Cultural
    R e s e r v a P r o v i n c i a l Isla De Los Estados Su Patrimonio Natural y Cultural Sistema Provincial de Áreas Naturales Protegidas Provincia de Tierra del Fuego Antártida e Islas del Atlántico Sur Provincia de Tierra del Fuego Antártida e Islas del Atlántico Sur Hlopec, Ricardo Reserva provincial Isla de los Estados : su patrimonio natural y cultural / Ricardo Hlopec y Nora Loekemeyer ; con colaboración de Silvia Gigli ... [et.al.]. - 1a ed. - : Secretaria de Desarrollo Sustentable y Ambiente. Dirección de Areas Protegidas y Biodiversidad. Ushuaia, 2009. 40 p. ; 30x21 cm. - (Sistema Provincial de áreas protegidas; 2) ISBN 978-950-9427-22-8 1. Recursos Naturales. 2. Reservas. 3. Conservación. I. Loekemeyer, Nora II. Gigli, Silvia, colab. III. Título CDD 333.951 6 Fecha de catalogación: 13/07/2009 © 2009 Dirección de Áreas Protegidas y Biodiversidad. Secretaría de Desarrollo Sustentable y Ambiente. Autores: Ricardo Hlopec y Nora Loekemeyer Colaboradores | Silvia Gigli (Dirección de Áreas Protegidas y Biodiversidad), Martín Vázquez (MFM), Roberto Agüero (Dirección de Catastro. Departamento Sistema Información Geográfico), Andrea Raya Rey (CADIC) y Germán Palé (FVSA). Agradecimientos | Agradecemos la colaboración prestada por los siguientes organismos y personas, sin la cual no hubiese sido posible realizar esta publicación: Dirección de Catastro y Dirección de Planeamiento Estratégico del Ministerio de Economía Museo Provincial del Fin del Mundo (MFM), Instituto Fueguino de Turismo (Infuetur), Centro Austral de Investigaciones Científicas (CADIC), Fundación Vida Silvestre Argentina (FVSA), Miguel Isla, Graciela Ortíz, Ilde Lizarralde, Marcelo Sakayan, Patricia Mosti, Adrián Schiavini, Flavio Quintana, Augusto Máspero, Fabricio Iriarte, Gustavo Valdéz, Teresa Rosas de la Fuente, Juan Carlos Rokich, Luis Bala, Mark Royo Celano, Andrés Johnson, Osvaldo Peralta, Carlos Vairo, Gustavo Aparicio y Gustavo Piaggio.
    [Show full text]
  • Tierra Del Fuego Atlantic Offshore) Geologica Acta: an International Earth Science Journal, Vol
    Geologica Acta: an international earth science journal ISSN: 1695-6133 [email protected] Universitat de Barcelona España TASSONE, A.; LODOLO, E.; MENICHETTI, M.; YAGUPSKY, D.; CAFFAU, M.; VILAS, J.F. Seismostratigraphic and structural setting of the Malvinas Basin and its southern margin (Tierra del Fuego Atlantic offshore) Geologica Acta: an international earth science journal, vol. 6, núm. 1, marzo, 2008, pp. 55-67 Universitat de Barcelona Barcelona, España Available in: http://www.redalyc.org/articulo.oa?id=50513100005 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Geologica Acta, Vol.6, Nº 1, March 2008, 55-67 DOI: 10.1344/105.000000241 Available online at www.geologica-acta.com Seismostratigraphic and structural setting of the Malvinas Basin and its southern margin (Tierra del Fuego Atlantic offshore) 1 2 3 1 2 1 A. TASSONE E. LODOLO M. MENICHETTI D. YAGUPSKY M. CAFFAU and J.F. VILAS 1 CONICET-Instituto de Geofísica “Daniel A. Valencio” (INGEODAV). Departamento de Geología Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires Ciudad Universitaria. Pabellón 2. 1428 Ciudad Autónoma de Buenos Aires. Argentina. Tassone E-mail: [email protected] Yagupsky E-mail: [email protected] Vilas Email: [email protected] 2 Istituto Nazionale di Oceanografia e Geofisica Sperimentale (OGS) Borgo Grotta Gigante 42/C. 34010 Sgonico. Trieste. Italy. Lodolo E-mail: [email protected] Caffau E-mail: [email protected] 3 Istituto di Scienze della Terra.
    [Show full text]
  • Fact Sheet Fact Sheet
    PATAGONIA FACT SHEET PATAGONIA FACT SHEET INTRODUCTION The vast wilderness of Central Patagonia features temperate rainforests, snow-capped peaks and lakes and to the west the Chilean Archipelago, a labyrinth Immense, beautiful and desolate - Patagonia is a of fjords and islands, home to the northernmost of sparsely populated region at the southern end of South Patagonia’s many sea-level glaciers. America, shared by Chile and Argentina and stretching from the Rio Colorado in the north to Tierra del Fuego in the south. The region is made up of the Andes Mountains to the west and south with low plains, deserts and plateaus to the east. Patagonia has two coasts - the Pacific Ocean to the west and the Atlantic Ocean to the east. Stretching across Chile & Argentina, the Patagonia National Park at the bottom of South America is one of the most spectacular places on Earth. The Argentine portion of Patagonia includes the provinces of Neuquén, Río Negro, Chubut, Santa Cruz and Tierra del Fuego (Land of Fire), as well as the southern tips of the provinces of Buenos Aires, Mendoza and La Pampa. The Chilean part comprises the southern part of the region of Los Lagos and the regions of Aysen and Magallanes. Patagonia can be divided into three zones - the Lake District of Northern Patagonia, Central Southern Patagonia encompasses the southern Andes Patagonia and Southern Patagonia. of Chile and Argentina as well as Tierra del Fuego. To the west of the semi-arid Patagonian plateau, immense The Lake District is a region of dramatic volcanoes, granite spires such as Cerro Torre and Fitzroy in evergreen forests and beautiful lakes.
    [Show full text]
  • TESIS DOCTORAL “La Isla De Los Estados (RA) Un Lugar Para El
    TESIS DOCTORAL Titulo: “La Isla de los Estados (RA) un lugar para el control de navegación (aérea y marítima) del Mar Argentino, que permitiría el ejercicio responsable de la soberanía nacional”. Autor: Dr. JUSTINO BERTOTTO Directora de Tesis: Dra. MARIA CARMEN PEREYRA BARRANCOS Fecha de defensa: 10 de noviembre de 2014 Resolución Decanal: 40 / 2014 Composición del Tribunal Dr. Julio j. Bardi Dr. Julio H. Rubé Ing. Horacio Ávila Dr. Carlos E. Ereño “La Isla de los Estados (RA) un lugar para el control de navegación (aérea y marítima) del Mar Argentino, que permitiría el ejercicio respon- sable de la soberanía nacional”. Introducción 1. Resumen del problema. La selección de tema de tesis fue resultado de un proceso de análisis profundo en el que debía quedar absolutamente claro que el recorte disciplinar elegido estaba centrado en un problema de variables de naturaleza geográfica y, por ende, las soluciones se de- berían encontrar en la misma área de conocimiento científico. Por ello era indispensable relacionar el sentido preponderantemente geopolítico del problema con un significado y argumento, si bien, determinado en lo geográfico, con cierto grado de transdisciplinarie- dad.1. 1GRIMBERG, Miguel. (2003), “EDGAR MORIN Y EL PENSAMIENTO COMPLEJO” Ed C a mp o d e I d e a s . M a d r id . E n e l G lo s a r io . ” Mo rín promueve una imbricación transdisciplinaria de unas ciencias en otras en pos de una cosmovisión integradora, para superar una época de saberes en compartimentos y aislados los unos de los otros”. En tal sentido, el análisis del problema, llevó a considerar hechos y circunstancias que provenían del escenario Austral, algunos con una expresión y naturaleza más geopolíti- ca y otros con datos que la geografía física, humana, económica y política cuyo aporte desde la ciencia geográfica fueron indispensables.
    [Show full text]
  • Achæoscillator Towards Incorporeal Forms of Sensing Listening and Gaze
    CAPE HORN ISLE | 2020 CAPE HORN Achæoscillator_ Towards incorporeal forms of sensing listening and gaze Research essays by: Paula López Wood | Alfredo Prieto Iglesias | Gerd Sielfeld | Alessandra Burotto 1 Terra Australis Ignota Research Group (TARIG) is working on a large exhibition in collaboration with the Contemporary Art Museum, Santiago de Chile 2021. TAIRG is part of Terra Ignota (terra-ignota.net), a research platform that was born with the idea of seeking an unconventional way of reading the southernmost territory on the planet through the transdisciplinary intersection that integrates local communities, science and art. Terra Ignota, initiated in 2015 by and for a dynamic group of Chilean and international artists, scientists, curators and producers as a recurrent nomadic lab, focusing on the austral region of Magallanes and the Antarctica peninsula as the area where to analyse the local ecosystem. Informed by archaeology, (de/colonial) history, (indigenous) practices, nature and climate of the region and is aiming to connect that to urgent global questions. Terra Ignota is rhizomatic, it moves slowly, listens, zooms in and out, and connects; it’s periodic encounters continuously (re)shape the direction and outcomes of the project, which will manifest itself in manifold collaborative manifestations such as artistic and scientific publications and presentations, and performances, interventions and installations in the context of international exhibitions. Photo by Víctor Mazón Gardoqui 2 In 2018, Terra Australis Ignota Research Group traveled to Cape Horn, the southernmost continental island in the world before Antarctica. There, the air, water and earth come together, where the line that divides the two oceans, the land and the air vanishes.
    [Show full text]
  • Dispute Between Argentina and Chile Concerning the Beagle Channel
    REPORTS OF INTERNATIONAL ARBITRAL AWARDS RECUEIL DES SENTENCES ARBITRALES Dispute between Argentina and Chile concerning the Beagle Channel 18 February 1977 VOLUME XXI pp.53-264 NATIONS UNIES - UNITED NATIONS Copyright (c) 2006 PART II Case concerning a dispute between Argentina and Chile concerning the Beagle Channel Affaire concernant un litige entre la République argentine et la République du Chili relatif au canal de Beagle CASE CONCERNING A DISPUTE BETWEEN ARGENTINA AND CHILE CONCERNING THE BEAGLE CHANNEL [Editorial note A dispute having arisen between Argentina and Chile concerning the territorial and maritime boundaries between them and the title to certain islands, islets and rocks near the extreme end of the South American continent (the region of the eastern Beagle Channel), an Arbi- tration Tribunal was established pursuant to a compromise signed on 22 July 1971 (see p. 64 below). On 18 February 1977, the Tribunal ren- dered its award (see p. 77 below). In an exchange of diplomatic notes dated 25 and 26 January 1978 (see p. 226 below), Argentina declared the award insuperably null and void in accordance with international law and Chile rejected this "decla- ration of invalidity". On 20 February 1978, Argentina and Chile signed an agreement in Puerto Montt, Chile, to resolve through negotiations issues pertaining to the relations between the two countries, particularly those stemming from the situation in the southern region (see p. 237 below). On 8 Janu- ary 1979, the two States signed the Act of Montevideo by which they requested the Holy See to act as a mediator with regard to their dispute over the southern region (see p.
    [Show full text]
  • A Newly Discovered Breeding Colony of Emperor Penguins Aptenodytes Forsteri
    2000Marine Ornithology 28: 119–120 (2000)Coria & Montalti: New Emperor Penguin breeding colony 119 A NEWLY DISCOVERED BREEDING COLONY OF EMPEROR PENGUINS APTENODYTES FORSTERI NESTOR R. CORIA1 & DIEGO MONTALTI1,2 1Departamento de Ciencias Biológicas, Instituto Antartico Argentino, Cerrito 1248, 1010 Buenos Aires, Argentina ([email protected]) 2Cátedra Fisiología Animal, Facultad de Ciencias Naturales y Museo, Paseo del Bosque s/n 1900 La Plata, Argentina Received 4 April 2000, accepted 20 July 2000 Breeding colonies of Emperor Penguins Aptenodytes forsteri observed adults and juveniles between the 1987/88 and 1995/ are distributed around the Antarctic coastline, on winter sea 96 summers (N.R. Coria unpubl. data). Between the 1993/94 ice between 66°S and 78°S (Watson 1975, Woehler 1993, to 1996/97 summers, many immature Emperor Penguins were Williams 1995). Colonies occur in three main areas: the often seen at Cockburn Island (64°22'S, 56°50'W), Seymour Weddell Sea and Dronning Maud Land, Enderby and Princess Island (64°14'S, 56°38'W) and Snow Hill Island (64°22'S, Elizabeth Lands, and the Ross Sea, with seven additional colo- 57°11'W) by Argentinean scientists (J. Lunski, R. del Valle nies discovered between 1979 and 1990 (Woehler 1993). and R. Capdevilla pers. comm.). Many colonies have not been counted for many years, and the current minimum breeding population is 202 200 pairs in 43 Here we report an additional breeding colony (the 44th known) breeding colonies (Woehler & Croxall 1997). During the of Emperor Penguins in the north-east of the Antarctic Penin- breeding season of Emperor Penguins (April–November) sula.
    [Show full text]
  • Distribution, Breeding and Status of the Striated Caracara Phalcoboenus Australis (Gmelin, 1788) in Southern Chile
    Anales Instituto Patagonia (Chile), 2006. 34: 65-74 65 DISTRIBUTION, BREEDING AND STATUS OF THE STRIATED CARACARA PHALCOBOENUS AUSTRALIS (GMELIN, 1788) IN SOUTHERN CHILE DISTRIBUCIÓN, NIDIFICACIÓN Y ESTATUS DEL CARANCHO NEGRO PHALCOBOENUS AUSTRALIS (GMELIN, 1788) EN EL SUR DE CHILE Manuel Marín1, 3, Alejandro Kusch2,3, David Oehler3 & Scott Drieschman3,4 ANTECEDENTS and Noir Island, between 11-16 November 2003, 14-21 November 2004 and 8-11 November 2005. The genus Phalcoboenus of caracaras is One trip through the exterior islands between Noir, a New World group that is comprised of four me- Recalada and Inman Islands on 12-18 November dium size species, mainly scavenger birds of prey. 2005. Additional observations were made by (MM) The four species are linked mainly to vegetation during cruises on board of M/V Terra Australis and free zone along the Andean-patagonian axis, from Mare Australis, on 13 different passages between the Ecuador south to the southern end of South America strait of Magellan and Beagle Channel, from 2001 (Vuilleumier 1970, 1991). The Striated Caracara through 2003 and dates ranging from December (Phalcoboenus australis) has been considered a to April (2001: 27 January to 3 February; 10-17 rare and near-threatened species, very local or with February; 3-10 March; 10-17 March; 17-24 March; unknown status, inhabiting the southern islands of 14-21 April; 1-8 December; 2002: 19-26 January; extreme southern South America, including the 9-16 February; 9-16 March; 23-30 March; 2003: 25 Falklands Islands (or Islas Malvinas), and as a casual January to 1 February; 22 February to 1 March).
    [Show full text]
  • No Blue, No Green”, Aimed at Protecting the Habitats and Species of the Argentine Sea and Its Coasts
    PROTECTING THE PATAGONIAN SEA 20/12/ 2018 Bill: Mitre Peninsula Protected Area CHANGING Thanks to collaborative working between Tierra del Fuego’s provincial government and civil THE CURRENT PATHsociety organizations, a bill was introduced for creating Mitre IS ON ALL OF US. Peninsula Provincial Park. 17/05/ 2019 Provincial Bill: anti-salmon farming In May, many legislators and candidates for legislators followed Ushuaia’s example and put forward a bill for prohibiting this industry in the province. We are still working for the society to say #NoALaSalmonicultura. We also worked for putting the break on the establishment of salmon industry activities in the Beagle Channel. The In May, many legislators and candidates for legislators #NoALaSalmonicultura campaign followed Ushuaia’s example and put forward a bill for fostered the passing of a prohibiting this industry in the province. We are still working municipal ordinance which for the society to say #NoALaSalmonicultura. prohibits any salmon-related activity in Ushuaia’s public land. STATE OF THE OCEANS “THE“THE SEA SEA IN IN NUMBERS” NUMBERS” Every day, 150 whales, dolphins IN ENARGENTINA, ARGENTINA WE SE THROW TIRAN and porpoises die due to tangling up in fishing gears. 1.3 1.3MILLION MILLONES OF PET DE BOTELLASBOTTLES PET CADA EVERY 24 HORAS DAY. ENDANGERED SPECIES: UP TO 1 MILLION COAST:6816 6,816 KM DE KM COSTA ARGENTINA’S36% DE TERRITORIO WATERS COVERES 36%MAR OF THE COUNTRY’S TERRITORY Argentina ocupa la posición 50% of corals and 1/3 of No 28 en el ranking seagrass have been de contaminación destroyed. por plásticos de países costeros.
    [Show full text]
  • Penguins of the Magellan Region*
    SCI. MAR., 63 (Supl. 1): 485-493 SCIENTIA MARINA 1999 MAGELLAN-ANTARCTIC. ECOSYSTEMS THAT DRIFTED APART. W.E. ARNTZ and C. RÍOS (eds.) Penguins of the Magellan region* M. BINGHAM and E. MEJIAS Environmental Research Unit, PO Box 434, Stanley, Falkland Islands. E-mail: [email protected] or [email protected] SUMMARY: The Magellan region, including the Falkland Islands, is one of the world’s most important areas for seabirds, and especially penguins. World-wide there are 17 species of penguin; 7 of these regularly breed around the coastal waters of South America, and 5 within the Magellan region. These are the King Penguin (Aptenodytes patagonicus), Gentoo Pen- guin (Pygoscelis papua), Rockhopper Penguin (Eudyptes c. chrysocome), Macaroni Penguin (Eudyptes chrysolophus) and Magellanic Penguin (Spheniscus magellanicus). During the last five years, a review of the breeding populations of penguins within the Magellan region was conducted. This work included population censuses of all the surface breeding species throughout the Falkland Islands and southern South America. The results of this work are presented, along with other cited information, to provide a summary of the current knowledge of penguin populations within the Magellan region. Key words: Penguin, Magellan, Falkland, Chile, Argentina. RESUMEN: LOS PINGÜINOS DE LA REGIÓN DE MAGELLANES. – La región de Magallanes, incluyendo las Islas Falkland, es un área muy importante para las aves marinas del mundo. Hay 17 especies de pingüinos; 7 crían en América del Sur y 5 crían en la región de Magallanes. Se trata de los Pingüino Rey (Aptenodytes patagonicus), Pingüino Papúa (Pygoscelis papua), Pingüino de Penacho Amarillo (Eudyptes c.
    [Show full text]