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Hydrothermal Alteration, Fumarolic Deposits and Fluids from Lastarria Volcanic Complex: a Multidisciplinary Study
Andean Geology 42 (3): 166-196. May, 2016 Andean Geology doi: 10.5027/andgeoV43n2-a02 www.andeangeology.cl Hydrothermal alteration, fumarolic deposits and fluids from Lastarria Volcanic Complex: A multidisciplinary study *Felipe Aguilera1, Susana Layana2, Augusto Rodríguez-Díaz3, Cristóbal González2, Julio Cortés4, Manuel Inostroza2 1 Departamento de Ciencias Geológicas, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta, Chile. [email protected] 2 Programa de Doctorado en Ciencias mención Geología, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta, Chile. [email protected]; [email protected]; [email protected] 3 Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, Delegación Coyoacán, 04150 México D.F., México. [email protected] 4 Consultor Independiente, Las Docas 4420, La Serena, Chile. [email protected] * Corresponding Author: [email protected] ABSTRACT. A multidisciplinary study that includes processing of Landsat ETM+ satellite images, chemistry of gas condensed, mineralogy and chemistry of fumarolic deposits, and fluid inclusion data from native sulphur deposits, has been carried out in the Lastarria Volcanic Complex (LVC) with the objective to determine the distribution and charac- teristics of hydrothermal alteration zones and to establish the relations between gas chemistry and fumarolic deposits. Satellite image processing shows the presence of four hydrothermal alteration zones, characterized by a mineral -
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Pritchard, M. E., de Silva, S. L., Michelfelder, G., Zandt, G., McNutt, S. R., Gottsmann, J., West, M. E., Blundy, J., Christensen, D. H., Finnegan, N. J., Minaya, E., Sparks, R. S. J., Sunagua, M., Unsworth, M. J., Alvizuri, C., Comeau, M. J., del Potro, R., Díaz, D., Diez, M., ... Ward, K. M. (2018). Synthesis: PLUTONS: Investigating the relationship between pluton growth and volcanism in the Central Andes. Geosphere, 14(3), 954-982. https://doi.org/10.1130/GES01578.1 Publisher's PDF, also known as Version of record License (if available): CC BY-NC Link to published version (if available): 10.1130/GES01578.1 Link to publication record in Explore Bristol Research PDF-document This is the final published version of the article (version of record). It first appeared online via Geo Science World at https://doi.org/10.1130/GES01578.1 . Please refer to any applicable terms of use of the publisher. University of Bristol - Explore Bristol Research General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/red/research-policy/pure/user-guides/ebr-terms/ Research Paper THEMED ISSUE: PLUTONS: Investigating the Relationship between Pluton Growth and Volcanism in the Central Andes GEOSPHERE Synthesis: PLUTONS: Investigating the relationship between pluton growth and volcanism in the Central Andes GEOSPHERE; v. 14, no. 3 M.E. Pritchard1,2, S.L. de Silva3, G. Michelfelder4, G. Zandt5, S.R. McNutt6, J. Gottsmann2, M.E. West7, J. Blundy2, D.H. -
ABSTRACTS ACTAS IAGOD 2019 31Ene.Pmd
SALTA, ARGENTINA 28-31 AUGUST 2018 15th Quadrennial International Association on the Genesis of Ore Deposits Symposium SPONSORS PLATINUM SPONSORS GOLD SPONSORS SILVER SPONSORS BRONZE SPONSORS COPPER SPONSORS Co-sponsored by SALTA, ARGENTINA 28-31 AUGUST 2018 15th Quadrennial International Association on the Genesis of Ore Deposits Symposium SYMPOSIUM PROCEEDINGS SCIENTIFIC COMMITTEE CHAIR Lira Raúl – (University of Córdoba – CONICET, Argentina) MEMBERS Bineli-Betsi Thierry – (Botswana International University of Science and Technology) Chang Zhaoshan – (Colorado School of Mines, USA) Cherkasov Sergey – (Vernadsky State Geological Museum of Russian Academy of Sciences) Cook Nigel – (University of Adelaide, Australia) Gozalvez Martín – (Geological and Mining Survey of Argentina) Guido Diego – (CONICET/Austral Gold S.A, Argentina) Lentz David – (University of New Brunswick, Economic Geology Chair) López Luis – (National Atomic Energy Commission, Argentina) Mao Jingwen – (Chinese Academy of Geological Sciences/Hebei GEO University, China) Meinert Larry – (Consultant) Pons Josefina – (IIPG – University of Río Negro – University of Comahue – CONICET, Argentina) Rubinstein Nora – (IGEBa–University of Buenos Aires – CONICET) Sanematsu Kenzo – (Geological Survey of Japan, AIST) Schutesky Della Giustina Maria Emilia – (University of Brasília, Brasil) Tornos Fernando – (Spanish National Research Council – CSIC) Watanabe Yasushi – (Faculty of International Resource Sciences, Akita University, Japan) EDITED BY Daniel Rastelli, Dolores Álvarez, Noelia -
Effects of Volcanism, Crustal Thickness, and Large Scale Faulting on the He Isotope Signatures of Geothermal Systems in Chile
PROCEEDINGS, Thirty-Eighth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 11-13, 2013 SGP-TR-198 EFFECTS OF VOLCANISM, CRUSTAL THICKNESS, AND LARGE SCALE FAULTING ON THE HE ISOTOPE SIGNATURES OF GEOTHERMAL SYSTEMS IN CHILE Patrick F. DOBSON1, B. Mack KENNEDY1, Martin REICH2, Pablo SANCHEZ2, and Diego MORATA2 1Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA 2Departamento de Geología y Centro de Excelencia en Geotermia de los Andes, Universidad de Chile, Santiago, CHILE [email protected] agree with previously published results for the ABSTRACT Chilean Andes. The Chilean cordillera provides a unique geologic INTRODUCTION setting to evaluate the influence of volcanism, crustal thickness, and large scale faulting on fluid Measurement of 3He/4He in geothermal water and gas geochemistry in geothermal systems. In the Central samples has been used to guide geothermal Volcanic Zone (CVZ) of the Andes in the northern exploration efforts (e.g., Torgersen and Jenkins, part of Chile, the continental crust is quite thick (50- 1982; Welhan et al., 1988) Elevated 3He/4He ratios 70 km) and old (Mesozoic to Paleozoic), whereas the (R/Ra values greater than ~0.1) have been interpreted Southern Volcanic Zone (SVZ) in central Chile has to indicate a mantle influence on the He isotopic thinner (60-40 km) and younger (Cenozoic to composition, and may indicate that igneous intrusions Mesozoic) crust. In the SVZ, the Liquiñe-Ofqui Fault provide the primary heat source for the associated System, a major intra-arc transpressional dextral geothermal fluids. Studies of helium isotope strike-slip fault system which controls the magmatic compositions of geothermal fluids collected from activity from 38°S to 47°S, provides the opportunity wells, hot springs and fumaroles within the Basin and to evaluate the effects of regional faulting on Range province of the western US (Kennedy and van geothermal fluid chemistry. -
Seasonal Patterns of Atmospheric Mercury in Tropical South America As Inferred by a Continuous Total Gaseous Mercury Record at Chacaltaya Station (5240 M) in Bolivia
Atmos. Chem. Phys., 21, 3447–3472, 2021 https://doi.org/10.5194/acp-21-3447-2021 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Seasonal patterns of atmospheric mercury in tropical South America as inferred by a continuous total gaseous mercury record at Chacaltaya station (5240 m) in Bolivia Alkuin Maximilian Koenig1, Olivier Magand1, Paolo Laj1, Marcos Andrade2,7, Isabel Moreno2, Fernando Velarde2, Grover Salvatierra2, René Gutierrez2, Luis Blacutt2, Diego Aliaga3, Thomas Reichler4, Karine Sellegri5, Olivier Laurent6, Michel Ramonet6, and Aurélien Dommergue1 1Institut des Géosciences de l’Environnement, Université Grenoble Alpes, CNRS, IRD, Grenoble INP, Grenoble, France 2Laboratorio de Física de la Atmósfera, Instituto de Investigaciones Físicas, Universidad Mayor de San Andrés, La Paz, Bolivia 3Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland 4Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT 84112, USA 5Université Clermont Auvergne, CNRS, Laboratoire de Météorologie Physique, UMR 6016, Clermont-Ferrand, France 6Laboratoire des Sciences du Climat et de l’Environnement, LSCE-IPSL (CEA-CNRS-UVSQ), Université Paris-Saclay, Gif-sur-Yvette, France 7Department of Atmospheric and Oceanic Sciences, University of Maryland, College Park, MD 20742, USA Correspondence: Alkuin Maximilian Koenig ([email protected]) Received: 22 September 2020 – Discussion started: 28 October 2020 Revised: 20 January 2021 – Accepted: 21 January 2021 – Published: 5 March 2021 Abstract. High-quality atmospheric mercury (Hg) data are concentrations were linked to either westerly Altiplanic air rare for South America, especially for its tropical region. As a masses or those originating from the lowlands to the south- consequence, mercury dynamics are still highly uncertain in east of CHC. -
Report on Cartography in the Republic of Chile 2011 - 2015
REPORT ON CARTOGRAPHY IN CHILE: 2011 - 2015 ARMY OF CHILE MILITARY GEOGRAPHIC INSTITUTE OF CHILE REPORT ON CARTOGRAPHY IN THE REPUBLIC OF CHILE 2011 - 2015 PRESENTED BY THE CHILEAN NATIONAL COMMITTEE OF THE INTERNATIONAL CARTOGRAPHIC ASSOCIATION AT THE SIXTEENTH GENERAL ASSEMBLY OF THE INTERNATIONAL CARTOGRAPHIC ASSOCIATION AUGUST 2015 1 REPORT ON CARTOGRAPHY IN CHILE: 2011 - 2015 CONTENTS Page Contents 2 1: CHILEAN NATIONAL COMMITTEE OF THE ICA 3 1.1. Introduction 3 1.2. Chilean ICA National Committee during 2011 - 2015 5 1.3. Chile and the International Cartographic Conferences of the ICA 6 2: MULTI-INSTITUTIONAL ACTIVITIES 6 2.1 National Spatial Data Infrastructure of Chile 6 2.2. Pan-American Institute for Geography and History – PAIGH 8 2.3. SSOT: Chilean Satellite 9 3: STATE AND PUBLIC INSTITUTIONS 10 3.1. Military Geographic Institute - IGM 10 3.2. Hydrographic and Oceanographic Service of the Chilean Navy – SHOA 12 3.3. Aero-Photogrammetric Service of the Air Force – SAF 14 3.4. Agriculture Ministry and Dependent Agencies 15 3.5. National Geological and Mining Service – SERNAGEOMIN 18 3.6. Other Government Ministries and Specialized Agencies 19 3.7. Regional and Local Government Bodies 21 4: ACADEMIC, EDUCATIONAL AND TRAINING SECTOR 21 4.1 Metropolitan Technological University – UTEM 21 4.2 Universities with Geosciences Courses 23 4.3 Military Polytechnic Academy 25 5: THE PRIVATE SECTOR 26 6: ACKNOWLEDGEMENTS AND ACRONYMS 28 ANNEX 1. List of SERNAGEOMIN Maps 29 ANNEX 2. Report from CENGEO (University of Talca) 37 2 REPORT ON CARTOGRAPHY IN CHILE: 2011 - 2015 PART ONE: CHILEAN NATIONAL COMMITTEE OF THE ICA 1.1: Introduction 1.1.1. -
Scale Deformation of Volcanic Centres in the Central Andes
letters to nature 14. Shannon, R. D. Revised effective ionic radii and systematic studies of interatomic distances in halides of 1–1.5 cm yr21 (Fig. 2). An area in southern Peru about 2.5 km and chalcogenides. Acta Crystallogr. A 32, 751–767 (1976). east of the volcano Hualca Hualca and 7 km north of the active 15. Hansen, M. (ed.) Constitution of Binary Alloys (McGraw-Hill, New York, 1958). 21 16. Emsley, J. (ed.) The Elements (Clarendon, Oxford, 1994). volcano Sabancaya is inflating with U LOS of about 2 cm yr . A third 21 17. Tanaka, H., Takahashi, I., Kimura, M. & Sobukawa, H. in Science and Technology in Catalysts 1994 (eds inflationary source (with ULOS ¼ 1cmyr ) is not associated with Izumi, Y., Arai, H. & Iwamoto, M.) 457–460 (Kodansya-Elsevier, Tokyo, 1994). a volcanic edifice. This third source is located 11.5 km south of 18. Tanaka, H., Tan, I., Uenishi, M., Kimura, M. & Dohmae, K. in Topics in Catalysts (eds Kruse, N., Frennet, A. & Bastin, J.-M.) Vols 16/17, 63–70 (Kluwer Academic, New York, 2001). Lastarria and 6.8 km north of Cordon del Azufre on the border between Chile and Argentina, and is hereafter called ‘Lazufre’. Supplementary Information accompanies the paper on Nature’s website Robledo caldera, in northwest Argentina, is subsiding with U (http://www.nature.com/nature). LOS of 2–2.5 cm yr21. Because the inferred sources are more than a few kilometres deep, any complexities in the source region are damped Acknowledgements such that the observed surface deformation pattern is smooth. -
Area Changes of Glaciers on Active Volcanoes in Latin America Between 1986 and 2015 Observed from Multi-Temporal Satellite Imagery
Journal of Glaciology (2019), 65(252) 542–556 doi: 10.1017/jog.2019.30 © The Author(s) 2019. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Area changes of glaciers on active volcanoes in Latin America between 1986 and 2015 observed from multi-temporal satellite imagery JOHANNES REINTHALER,1,2 FRANK PAUL,1 HUGO DELGADO GRANADOS,3 ANDRÉS RIVERA,2,4 CHRISTIAN HUGGEL1 1Department of Geography, University of Zurich, Zurich, Switzerland 2Centro de Estudios Científicos, Valdivia, Chile 3Instituto de Geofisica, Universidad Nacional Autónoma de México, Mexico City, Mexico 4Departamento de Geografía, Universidad de Chile, Chile Correspondence: Johannes Reinthaler <[email protected]> ABSTRACT. Glaciers on active volcanoes are subject to changes in both climate fluctuations and vol- canic activity. Whereas many studies analysed changes on individual volcanoes, this study presents for the first time a comparison of glacier changes on active volcanoes on a continental scale. Glacier areas were mapped for 59 volcanoes across Latin America around 1986, 1999 and 2015 using a semi- automated band ratio method combined with manual editing using satellite images from Landsat 4/5/ 7/8 and Sentinel-2. Area changes were compared with the Smithsonian volcano database to analyse pos- sible glacier–volcano interactions. Over the full period, the mapped area changed from 1399.3 ± 80 km2 − to 1016.1 ± 34 km2 (−383.2 km2)or−27.4% (−0.92% a 1) in relative terms. -
Patagonia Luxury Hiking Excursion
Patagonia Luxury Hiking Excursion Please note that all of the itineraries listed in our web site are actual private tour itineraries we have prepared for clients over the past 12-18 months. By the very nature of what we do, each private tour itinerary is custom, exclusive and unique unto itself. Our over-riding goal is to create lifelong memories that you and your family will forever carry deep within your hearts. Overview Though our past hikes on the Milford Track (New Zealand), Inca Trail (Machu Picchu), Glacier (U.S.), and various areas of Switzerland and Austria were particularly memorable, we must confess that the hiking, horseback riding, and spectacular setting of, relatively inaccessible, Patagonia is unparalleled. The critical contrast is Patagonia’s pristine remoteness: no mass tourism or crowded hiking trails here! When hiking the wide range of areas in Patagonia, it is easy to see how this vast landscape still has hundreds of unnamed mountains, with many points inaccessible and unexplored. Located at the tip of the South American continent, the outstanding national parks (Torres del Paine!) and private reserves stretch across Chile and Argentina, divided by the Andes Mountains. The features of Patagonia are remarkable: wild rivers, muddy rainforests, glaciated peaks, granted monoliths, and vast steppes. This is a place for reflection, deep solitude, and unforgettable outdoor activities. Best Travel Time: Fall Winter Spring CHILE ARGENTINA Day 1 Temperature Range Temperature Range Fly to Santiago Highs: Mid 80’s Highs: Low 80’s Through our sister company, premium air provider Lows: Mid 50’s Lows: High 60’s TRAVNET, we may assist with your international airfare, as Area Area well as with mileage points conversion. -
Mesozoic to Tertiary Evolution of the Southwestern Proto-Pacific Gondwana Margin
University of Sydney, PhD Thesis, Kayla T. Maloney, 2012. The University of Sydney School of Geosciences Mesozoic to Tertiary evolution of the southwestern proto-Pacific Gondwana margin Kayla T. Maloney 2012 Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy The University of Sydney School of Geosciences Division of Geology and Geophysics Madsen Building (F09) Sydney, NSW, 2006 Australia University of Sydney, PhD Thesis, Kayla T. Maloney, 2012. i DECLARATION I declare that this thesis is less than 100,000 words in length, and that the work contained in this thesis has not been submitted for a higher degree at any other university or institution. Kayla T. Maloney August, 2012 PREFACE This PhD thesis consists of a collection of papers that are published or prepared for submission with international peer-reviewed journals appropriate to the discipline of geology. The publications form part of an integrated project and are presented in an order that represents the related elements of a connected thesis. The thesis contains an introductory section that provides an outline of the thesis, a summary of the contribution of the work to the field of geology, and a critical evaluation of the role of the thesis in informing further research in the field. Common themes in the papers are tied together and a discussion and conclusion of the whole thesis is presented at the end. No animal or ethical approvals were needed during the completion of this study. Data and interpretations in the thesis are the work of the author except where stated in the text. -
Catalog of the Types of Curculionoidea (Insecta, Coleoptera) Deposited at the Museo Argentino De Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires
Rev. Mus. Argentino Cienc. Nat., n.s. 15(2): 209-280, 2013 ISSN 1514-5158 (impresa) ISSN 1853-0400 (en línea) Catalog of the types of Curculionoidea (Insecta, Coleoptera) deposited at the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires Axel O. BACHMANN 1 & Analía A. LANTERI 2 1Museo Argentino de Ciencias Naturales, División Entomología, Buenos Aires C1405DJR. Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires C1428EHA, e-mail: [email protected]. uba.ar. 2 Museo de La Plata, División Entomología, Paseo del Bosque s/n, La Plata, B1900FWA, Argentina, e-mail: [email protected] Abstract: The type specimens of Curculionoidea (Apionidae, Brentidae, Anhribidae, Curculionidae, Platypodidae, and Scolytidae) from the Museo Argentino de Ciencias Naturales (MACN), corresponding to all current categories, are herein catalogued. A total of 344 specific and subspecific names are alphabetically recorded, for their original binomina or trinomina, and spellings. Later combinations and synonyms are mentioned, as well as the informa- tion of all the labels associated to the specimens. In order to assist future research, three further lists are added: 1. specimens deemed to be deposited at MACN but not found in the collection; 2. specimens labeled as types of species which descriptions have probably never been published (non available names); and 3. specimens of dubi- ous type status, because the information on the labels does not agree with that of the original publication. Key words: Type specimens, Curculionoidea, Coleoptera, Insecta. Resumen: Catálogo de los tipos de Curculionoidea (Insecta, Coleoptera) depositados en el Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires. -
Challenges in Ascertaining the Late Quaternary Tephrostratigraphy of Southernmost Chile and Argentina Stefan M
Challenges in ascertaining the late Quaternary tephrostratigraphy of southernmost Chile and Argentina 1 1 2 1 1 3 Stefan M. Lachowycz , Karen Fontijn , Victoria C. Smith , David M. Pyle , Tamsin A. Mather , José A. Naranjo [1] Department of Earth Sciences, University of Oxford, UK [2] Research Laboratory for Archaeology and the History of Art, University of Oxford, UK [3] Servicio Nacional de Geología y Minería, Santiago, Chile [email protected] # ## ! Overview Palaeoenvironmental archives 76°W 74°W 72°W 70°W 68°W 80°W 60°W 40°W Tephra preservation in palaeoenvironmental records Cha1 ! # 10°N ! Cha2 ! ! - The explosive eruption history and tephrostratigraphy in southernmost Chile/Argentina Minchinmávida Mic1 Issues with using tephra in palaeoenvironmental archives in this region to correlate records and constrain eruption parameters: and explosive eruption history ! # 0° ! Chaitén# Cor3 is significant for volcanic hazard assessment and as a tool to correlate and date reliably Corcovado# ! - 19 volcanic centres are thought to have been Cha2008 10°S Environment Physical preservation Chemical preservation Dating and record bias issues the many palaeoenvironmental archives here, but is currently poorly constrained. Yanteles# active in post-glacial times in southernmost # Yan1 Peat - Spatially and temporally variable - Al, Fe, alkali and alkali earth metals - Tephra layers are dispersed by root growth, 20°S 14 6 - We have reviewed the existing late Quaternary tephrostratigraphic record, and here # accumulation rates (F6, F7) ca use depth