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3.Nishida Riesco.Pmd
11 PRELIMINARY REPORT ON PERMINERALIZED PLANT REMAINS POSSIBLY FROM THE PALEOCENE CHORRILLO CHICO FORMATION, MAGALLANES REGION, CHILE Harufumi Nishida1, Kazuhiko Uemura2, Kazuo Terada3, Toshihiro Yamada2, Miguel Rancusi Herrera4, and Luis Felipe Hinojosa5 1Faculty of Science and Engineering, Chuo University, Bunkyo, Tokyo 112-8551, Japan E-mail: [email protected] 2National Science Museum, Tokyo 169-0073, Japan 3Fukui Prefectural Dinosaur Museum, Fukui 911-8601, Japan 4Colegio Compania de Maria, Santiago, Chile 5Facultad de Ciencias, Universidad de Chile, Santiago, Chile Introduction New assemblages of well-preserved permineralized plant fossils were found in southern Patagonia on the southern shore of Riesco Island (Isla Riesco), northwest of Punta Arenas, in the Magallanes (XII) Region of Chile (Figs. 1, 2A, B). The fragments of plant organs and tissues in various sizes and degrees of preservation are present in calcium-carbonate concretions collected at the mouth of the Rio Boer river near Punta Sunshine (53°01.8’S, 71°55.6’W). The concretions are marine in origin, containing molluskcs that may help age determination and biostratigraphic correlation of their source beds. Thick Upper Cretaceous to Tertiary sediments with a NW-SE trend dipping NE are well exposed at Riesco Island. The concretions are probably derived from sediments in the Palaeocene Chorrillo Chico Formation exposed along the Rio Boer running south into the Otway Sound (Seno Otway), because no other formation is distributed in the river drainage area (Mapa geologico de Chile, Escala 1: 1,000,000, 2002). This assignation is further supported by evidence that the Chorrillo Chico Formation is characterized by lithofacies containing calcareous concretions reported by Charrier and Lahsen (1969). -
Evaluating the Role of Tectonics, Eustasy, and Climate On
This manuscript is a preprint and has been submitted to Basin Research for peer review. Please note that, this manuscript has to be formally accepted for publication. Subsequent versions may have slight differences in content according to the peer review process. If accepted, the final version of this manuscript will be available via the ‘Peer-reviewed Publication DOI’ link on the right information panel of this website. We welcome feedback on the content of this manuscript. Please feel free to contact any of the authors. EVALUATING THE ROLE OF TECTONICS, EUSTASY, AND CLIMATE ON THE MAASTRICHTIAN-DANIAN TRANSGRESSION IN THE MAGALLANES- AUSTRAL BASIN (CHILEAN PATAGONIA) Huber A. Rivera1, 2, *, Jacobus P. Le Roux1, Marcelo Farías1, Néstor M. Gutiérrez1, Alejandro Sánchez3, Sylvia Palma-Heldt4, Lissett Celle1 1Departamento de Geología, FCFM, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile 2Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France 3Departamento de Ingeniería en Minas, Universidad de Santiago de Chile, Av. O'Higgins 3363, Estación Central, Santiago, Chile 4Departamento de Ciencias de la Tierra, Universidad de Concepción, Barrio Universitario S/N°, Concepción, Chile *Corresponding author: [email protected]; [email protected] Page 1 of 65 Basin Research 1 2 3 Evaluating the role of tectonics, eustasy, and climate on the Maastrichtian-Danian 4 5 6 transgression in the Magallanes-Austral Basin (Chilean Patagonia) 7 8 9 Huber A. Rivera1, 2, *, Jacobus P. Le Roux1, Marcelo Farías1, Néstor M. Gutiérrez1, 10 3 4 1 11 Alejandro Sánchez , Sylvia Palma-Heldt , Lissett Celle 12 13 1Departamento de Geología, FCFM, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile 14 15 2Univ. -
Fauna Terrestre De Isla Riesco, Magallanes: Una Revisión Bibliográfica
Anales Instituto Patagonia (Chile), 2019. Vol. 47(3):7-18 7 ARTÍCULO CIENTÍFICO Fauna terrestre de Isla Riesco, Magallanes: una revisión bibliográfica Terrestrial fauna of Riesco Island, Magallanes: a bibliographic review Javier A. Simonetti1, 2 & Gregor J. Stipicic2, 3 Resumen Casassa et al. 2002; Leppe et al. 2012; Betka et al. Se realizó una revisión de la literatura sobre la 2016). Actualmente, Isla Riesco es foco de estudio fauna terrestre reciente de Isla Riesco, Magallanes. tanto porque las actuales operaciones mineras De 60 publicaciones, que cubren los últimos 140 son consideradas un caso de injusticia ambiental años, extrajimos la información sobre los taxones, (Bustos et al. 2017), como por el significado social temas y lugares estudiados. y ambiental de la ampliación y transformación de la Reserva Nacional Alacalufes en el Parque Nacional Palabras clave: Kawésqar (Zorondo-Rodríguez et al. 2019). arácnidos, insectos, peces, anfibios, mamíferos, aves. Isla Riesco también ha sido objeto de estudios tanto de fauna actual como fósil (e.g., Abstract Markham, 1970; Hünicken et al. 1980), We performed a review of the literature on recent inspirando incluso poemas, como “Tuco tuco terrestrial fauna of Riesco Island, Magallanes. de la Isla Riesco” (Silva, 2002). Si bien existen Information regarding taxa studied, topics covered, publicaciones de difusión y generales sobre la biota and locality of study was retrieved from 60 de la región de Magallanes, incluyendo aquella publications spanning the last 140 years. de Isla Riesco (e.g. Martinic, 1957; Markham, 1971a; Venegas & Sielfeld, 1998), no existe a Key words: la fecha una síntesis de la misma. Con objeto de arachnids, insects, fish, amphibians, mammals, birds. -
Glacial and Tectonic Control on Fjord Morphology and Sediment Deposition in the Magellan Region (53°S), Chile
Marine Geology 346 (2013) 31–46 Contents lists available at ScienceDirect Marine Geology journal homepage: www.elsevier.com/locate/margeo Glacial and tectonic control on fjord morphology and sediment deposition in the Magellan region (53°S), Chile Sonja Breuer a,⁎, Rolf Kilian a, Dirk Schörner b, Wilhelm Weinrebe b, Jan Behrmann b, Oscar Baeza a a University of Trier, Department of Geology, FB VI, Behringstraße, 54286 Trier, Germany b GEOMAR Helmholtz Institute for Ocean Research, Wischhofstraße 1-3, 4148 Kiel, Germany article info abstract Article history: In the Patagonian Andes erosion by temperate Pleistocene glaciers has produced a deeply incised fjord system in Received 12 October 2011 which glacial and non-glacial sediments were deposited since the Late Glacial glacier retreat. So far, fjord bathym- Received in revised form 6 July 2013 etry and structures in the sediment infill were widely unexplored. Here we report the results of an investigation Accepted 23 July 2013 of morphology and sediment characteristics of a 250 km long fjord transect across the southernmost Andes Available online 1 August 2013 (53°S), using multibeam and parametric echosounder data, and sediment cores. Subaquatic morphology reveals fi Communicated by J.T. Wells continuity of on-land tectonic lineaments mapped using eld and remote sensing data. Our results indicate that glacial erosion and fjord orientation are strongly controlled by three major strike-slip fault zones. Furthermore, Keywords: erosion is partly controlled by older and/or reactivated fracture zones as well as by differential resistance of reflection seismic the basement units to denudation. Basement morphology is regionally superimposed by Late Glacial and Holo- high-resolution bathymetry cene subaquatic moraines, which are associated to known glacier advances. -
Prieto 2013 Peopling Quat Int
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights Author's personal copy Quaternary International 317 (2013) 3e13 Contents lists available at SciVerse ScienceDirect Quaternary International journal homepage: www.elsevier.com/locate/quaint The peopling of the Fuego-Patagonian fjords by littoral huntere gatherers after the mid-Holocene H1 eruption of Hudson Volcano Alfredo Prieto a,b, Charles R. Stern c,*, Jordi E. Estévez b a Centro de Estudios del Hombre Austral, Instituto de la Patagonia, Universidad de Magallanes, Punta Arenas, Chile b Departament Prehistòria, Programa de Doctorado, Universitat Autònoma de Barcelona, Facultat de Lletres UAB, 08193 Bellaterra, Barcelona, Spain c Department of Geological Sciences, University of Colorado, 2200 Colorado Blvd, Boulder, CO 80309-0399, USA article info abstract Article history: Early Holocene (>8500 cal BP) littoral sites are well documented along the Pacific coast of Chile north of Available online 13 July 2013 32S, but they do not occur south of this latitude. It has been proposed that canoe Indians of Fuego- Patagonia, the earliest evidence for which is mid-Holocene (Punta Santa Ana; 7440 cal BP), adapted themselves to the sea from terrestrial hunteregatherer populations already living since >13,000 cal BP in southernmost South America south of 52S. -
11 Morello.Indd
| 139 Obsidiana verde en Tierra del Fuego y Patagonia: caracterización, distribución y problemáticas culturales a lo largo del Holoceno Flavia Morello, Charles Stern y Manuel San Román Recibido 2 de diciembre 2014. Aceptado 17 de junio 2015 RESUMEN La obsidiana verde como materia prima utilizada por los grupos cazadores recolectores prehistóricos de Fuego-Patagonia ha estado presente en la investigación macrorregional desde su descubrimiento ar- queológico, en la década de 1950. Se presenta una nueva síntesis crítica y actualizada de los estudios en torno a esta materia prima volcánica y se discuten nuevos análisis geoquímicos, para comprender su relación con aspectos culturales como aprovisionamiento, distribución y tecnología. La localización exacta de la fuente de obtención es aún desconocida, pero indicadores arqueológicos y geológicos circunscriben su ubicación al sector del mar de Otway e isla Riesco, región de Magallanes, Chile. Se evalúan aspectos referidos a la distribución espacial y temporal del registro arqueológico de obsidiana verde, la presencia de un lapso de discontinuidad en su utilización y la discusión de su relevancia como evidencia de in- teracción cultural, entre grupos cazadores recolectores terrestres y marítimos, de oeste a este, y también entre el norte y sur del estrecho de Magallanes. Palabras clave: Obsidiana verde; Patagonia; Holoceno medio y tardío; Tecnología; Interacción. ABSTRACT GREEN OBSIDIAN IN TIERRA DEL FUEGO AND PATAGONIA: CHARACTERIZATION, DISTRIBUTION AND CULTURAL ISSUES DURING THE HOLOCENE. Green obsidian as raw material used by prehistoric hunter-gatherer groups of Fuego-Patagonia has been present in the macro-regional archaeological research since its discovery in the 1950s. A new critical synthesis and updated studies for this volcanic rock are presented and new geochemical analyses are discussed in order to understand their relation with cultural issues such as sourcing, distribution and technology. -
Tectonic Evolution of the Southern Austral-Magallanes Basin in Tierra Del Fuego
LAJSBA LATIN AMERICAN JOURNAL OF SEDIMENTOLOGY AND BASIN ANALYSIS | VOLUME 26 (2) 2019, 127-154 TECTONIC EVOLUTION OF THE SOUTHERN AUSTRAL-MAGALLANES BASIN IN TIERRA DEL FUEGO Rocío E. Gallardo Jara 1, Matías C. Ghiglione 1, Lisandro Rojas Galliani 2 1 Instituto de Estudios Andinos-CONICET, Departamento de Ciencias Geológicas, Universidad de Buenos Aires, Argentina. [email protected] 2 Enap Sipetrol S.A., Santiago, Chile. ARTICLE INFO ABSTRACT Article history The evolutionary history of the Austral Magallanes has been object of several Received November 16, 2018 studies both in Chile and Argentina, due to its importance as hydrocarbon and Accepted August 1º, 2019 gas producer. In the evolution of southern South America, a stage of intracratonic Available online August 4, 2019 rifting development between the Middle-Late Jurassic has been recognized in a wide part of southern Patagonia that generated an extensional basin (Rocas Verdes Invited Editor basin). Following the creation of a synrift fault system the basins evolved towards Augusto N. Varela an Early Cretaceous postrift sag stage that deposits a thick pelitic succession in Handling Editor a marine shelf environment, constituting these deposits in the main reservoir Sebastian Richiano and source rock for the oil plays. During the middle-Late Cretaceous in the entire Austral Patagonian region took a place a compressional regime over the Keywords east and south margin of southernmost South America. Product of Andean Austral-Magallanes basin growth in this sector were produced a magmatic arc, a Basement domain and Tierra del Fuego fold-and-thrust belt, and a foreland basin related to flexural loading. -
The Curved Magallanes Fold and Thrust Belt: Tectonic Insights from a Paleomagnetic and Anisotropy of Magnetic Susceptibility
The curved Magallanes fold and thrust belt: Tectonic insights from a paleomagnetic and anisotropy of magnetic susceptibility study F Poblete, Pierrick Roperch, F Hervé, M Diraison, M Espinoza, C Arriagada To cite this version: F Poblete, Pierrick Roperch, F Hervé, M Diraison, M Espinoza, et al.. The curved Magallanes fold and thrust belt: Tectonic insights from a paleomagnetic and anisotropy of magnetic sus- ceptibility study. Tectonics, American Geophysical Union (AGU), 2014, 33 (12), pp.2526-2551. 10.1002/2014TC003555. insu-01119438 HAL Id: insu-01119438 https://hal-insu.archives-ouvertes.fr/insu-01119438 Submitted on 23 Feb 2015 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. PUBLICATIONS Tectonics RESEARCH ARTICLE The curved Magallanes fold and thrust belt: Tectonic 10.1002/2014TC003555 insights from a paleomagnetic and anisotropy Key Points: of magnetic susceptibility study • Sediments from the Magallanes fold and thrust belt have low magnetite F. Poblete1,2, P. Roperch2, F. Hervé1,3, M. Diraison4, M. Espinoza1, and C. Arriagada1 content • CCW -
Sial Et Al..Fm
International Geology Review, Vol. 43, 2001, p. XXX–XXX. Copyright © 2001 by V. H. Winston & Son, Inc. All rights reserved. Carbon and Oxygen Isotope Compositions of Some Upper Cretaceous–Paleocene Sequences in Argentina and Chile A. N. SIAL,1 V. P. F ERREIRA, Department of Geology, NEG-LABISE, UFPE, P.O. Box 7852, Recife, PE, Brazil, 50732-970 A. J. TOSELLI, INSUGEO, National University of Tucuman, S.M. Tucuman, Argentina 4000 M. A. PARADA, Department of Geology, University of Chile, P.O. Box 13518, Santiago, Chile F. G. A CENOLAZA, INSUGEO, National University of Tucuman, S.M. Tucuman, Argentina 4000 M. M. PIMENTEL, Geosciences Institute, University of Brasilia, Brasilia, D.F., Brazil 70.910-970 AND R. N. ALONSO Department of Geology, National University of Salta, P.O. Box 362, Salta, Argentina, 4400 Abstract The Cretaceous–Paleocene (K–T) transition has been recorded in sedimentary carbonate rocks in northwestern Argentina and southern Chile. In the Yacoraite Basin, Argentina, this transition has been preserved in a 2 m thick marly layer, at the base of the Tunal Formation, which overlies lacus- trine/marine carbonates of the Yacoraite Formation (Cabra Corral dam). The K–T transition is also preserved at Maimara, where Tertiary sandstones overlie a 50 m thick limestone bed of the Yacoraite Formation. In the Magellan Basin, Chile, glauconitic sandstones with calcitic cement and limestone concretions of the Maastrichtian Punta Rocallosa Formation are overlain by sandstones, claystones, and limestones of the Chorillo Chico Formation. The K–T transition is preserved in the lower portion of the Chorillo Chico Formation. δ13 Carbonates of the Yacoraite Formation display bulk-rock C values from +1 to +2‰ PDB, with δ13 a negative incursion (–4‰ PDB) at the K–T transition. -
Shore Excursions
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