Thin-Skinned Tectonics in the Cordillera Oriental
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1.CEINTURE DE FEU, Paris
Cette ligne est matérialisée par une rainure dans la façade, dans laquelle sera logée une ligne de néons rouge/orangé, couleurd’origine dugaznéon. danslafaçade, danslaquelleseralogéeunelignedenéonsrouge/orangé, Cette ligneestmatérialisée parunerainure estla plus intense que l’activitéterrestre Ce qui projet, se déploie sur les 4 façades du bâtiment central de est la de la Ceinture Feu, représentation ligne qui par imaginaire relie, 352 points, tous les volcans le émergés long de la plaque Pacifique. C’est dans cette zone ontdatél’originedusystèmesolaire. del’IPGPqui,lespremiers, etàsonétudescientifique.Cesontleschercheurs àlaTerre dePhysiqueduGlobe,rueCuvieràParis,estundes10lieuxaumondeconsacrés L’Institut Vinson Murphy Takahe Toney Frakes Steere Siple Hampton Sidley Waesche Andrus Moulton Berlin Morning Discovery Terror Erebus - · · Melbourne autre. Overlord DE FEU. JUIN 2009 Burney Lautaro Hudson Macá AGENCE PIECES MONTEES Melimoyu Corcovado ANGELA DETANICO, RAFAEL LAIN Minchinmávida Tronador INSTITUT DE PHYSIQUE DU GLOBE, PARIS Osorno Nouvelle-Zélande dans le Pacifique Sud. LA CEINTURE DE FEU Puntiagudo Cette zone est également caractérisée par de l’Amérique Centrale et des zones côtières de Un très grand nombre des volcans mondiaux est plus de la moitié des volcans en activité au- Cette intense activité volcanique et sismique Lanín actifs sont situés dans la ceinture de feu, et d’enfoncement d’une plaque tectonique sous une l’Australie pour englober les îles Fidji et la La CEINTURE DE FEU est une ligne imaginaire qui Elle suit en grande partie la plaque pacifique. rassemblé sur cette ligne de 40 000 km de long. Parmi les 1500 volcans sur la planète, les plus dessus du niveau de la mer forme cette CEINTURE correspond à des zones de subduction, processus Cette longue guirlande d’îles volcaniques prend naissance à la pointe méridionale de l’Amérique relie les 452 volcans qui bordent l’Océan Pacifique. -
Magmatic Evolution of the Nevado Del Ruiz Volcano, Central Cordillera, Colombia Minera1 Chemistry and Geochemistry
Magmatic evolution of the Nevado del Ruiz volcano, Central Cordillera, Colombia Minera1 chemistry and geochemistry N. VATIN-PÉRIGNON “‘, P. GOEMANS “‘, R.A. OLIVER ‘*’ L. BRIQUEU 13),J.C. THOURET 14J,R. SALINAS E. 151,A. MURCIA L. ” Abstract : The Nevado del RU~‘, located 120 km west of Bogota. is one of the currently active andesitic volcanoes that lies north of the Central Cordillera of Colombia at the intersection of two dominant fault systems originating in the Palaeozoïc basement. The pre-volcanic basement is formed by Palaeozoïc gneisses intruded by pre-Cretaceous and Tertiarygranitic batholiths. They are covered by lavas and volcaniclastic rocks from an eroded volcanic chain dissected during the late Pliocene. The geologic history of the Nevado del Ruiz records two periods of building of the compound volcano. The stratigraphie relations and the K-Ar dating indicate that effusive and explosive volcanism began approximately 1 Ma ago with eruption of differentiated andesitic lava andpyroclastic flows and andesitic domes along a regional structural trend. Cataclysmic eruptions opened the second phase of activity. The Upper sequences consist of block-lavas and lava domes ranging from two pyroxene-andesites to rhyodacites. Holocene to recent volcanic eruptions, controled by the intense tectonic activity at the intersection of the Palestina fawlt with the regional fault system, are similar in eruptive style and magma composition to eruptions of the earlier stages of building of the volcano. The youngest volcanic activity is marked by lateral phreatomagmatic eruptions, voluminous debris avalanches. ash flow tuffs and pumice falls related to catastrophic collapse during the historic eruptions including the disastrous eruption of 1985. -
31 a Preliminary Study Of
31 A PRELIMINARY STUDY OF THE: TERTIARY VOLCANIC AND SEDIMENTARY ROCKS, GÜMELE, ESKİŞEHİR Eskişehir, Gümele Çevresindeki Tersiyer Volkanik ve Sedimanter Kayaçlarda Bir Ön Çalışma Taylan Lünel Middle East Technical University, Department of Geological Engineering Ankara ÖZ. — Seyitgazi-Eskişehir antiklinoriumu'nun çok fazla deforme olmuş ve metamorfizmaya uğramış kayaçlarının kuzey-kuzeybatısında bulunan sedimanter ve volkanik kayaçlar incelenmiştir. Karasal ve gölsel fasiyesde meydana gelen Tersi- yer sedimanter kayaçlar Güney Eskişehir küvetinde olunmuşlardır. Karasal fasiye- si meydana getiren kayaç birimlerini kaba kumtaşları, kumtaşları, bitki kalıntıları ihtiva eden kil ve marnlar ve serpantinit blokları taşıyan bazal konglomerası teşkil etmektedir. Gölsel fasiyes ise genellikle killi ve tüflü kalkerler, kalkerler, marnlar, kon- glomeralar ve tüflerden meydana gelmiştir. Küvetteki en eski sedimanlar ve piroklas- tikler Alt Miosen'de oluşmuşlardır. Yataya yakın konumlanmış bazik-intermediyar lav akıntıları Pliosen yaşlı olup Altüst Neojen sedimantasyon kesikliğinde meyda- na gelmiştir. Üst Neojen sedimanter kayaçları intermediyar-basaltik volkaniklerin üzerinde ince bandlar şeklinde bulunurlar. Bu birim marn ve kalkerlerden meyda- na gelmiştir. Alt Miosen’de asid volkanik faaliyetler neticesinde meydana gelen sil- lar (unweldd tuffs) oligomikt konglomeralardan evvel teşekkül etmiştir. Bu volkanik aktitivite muhtemelen kesikli ve kısıtlı olarak devam etmiş ve tüflü kalkerleri mey- dana getirmiştir. Pliosen yaşlı bazik-intermediyar -
Sr–Pb Isotopes Signature of Lascar Volcano (Chile): Insight Into Contamination of Arc Magmas Ascending Through a Thick Continental Crust N
Sr–Pb isotopes signature of Lascar volcano (Chile): Insight into contamination of arc magmas ascending through a thick continental crust N. Sainlot, I. Vlastélic, F. Nauret, S. Moune, F. Aguilera To cite this version: N. Sainlot, I. Vlastélic, F. Nauret, S. Moune, F. Aguilera. Sr–Pb isotopes signature of Lascar volcano (Chile): Insight into contamination of arc magmas ascending through a thick continental crust. Journal of South American Earth Sciences, Elsevier, 2020, 101, pp.102599. 10.1016/j.jsames.2020.102599. hal-03004128 HAL Id: hal-03004128 https://hal.uca.fr/hal-03004128 Submitted on 13 Nov 2020 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. Copyright Manuscript File Sr-Pb isotopes signature of Lascar volcano (Chile): Insight into contamination of arc magmas ascending through a thick continental crust 1N. Sainlot, 1I. Vlastélic, 1F. Nauret, 1,2 S. Moune, 3,4,5 F. Aguilera 1 Université Clermont Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, F-63000 Clermont-Ferrand, France 2 Observatoire volcanologique et sismologique de la Guadeloupe, Institut de Physique du Globe, Sorbonne Paris-Cité, CNRS UMR 7154, Université Paris Diderot, Paris, France 3 Núcleo de Investigación en Riesgo Volcánico - Ckelar Volcanes, Universidad Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile 4 Departamento de Ciencias Geológicas, Universidad Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile 5 Centro de Investigación para la Gestión Integrada del Riesgo de Desastres (CIGIDEN), Av. -
Tracing a Major Crustal Domain Boundary Based on the Geochemistry of Minor Volcanic Centres in Southern Peru
7th International Symposium on Andean Geodynamics (ISAG 2008, Nice), Extended Abstracts: 298-301 Tracing a major crustal domain boundary based on the geochemistry of minor volcanic centres in southern Peru Mirian Mamani1, Gerhard Wörner2, & Jean-Claude Thouret3 1 Georg-August University, Goldschmidstr. 1, 37077 Göttingen, Germany ([email protected], [email protected]) 2 Université Blaise Pascal, Clermont Ferrand, France ([email protected]) KEYWORDS : minor volcanic centres, crust, tectonic erosion, Central Andes, isotopes Introduction Geochemical studies of Tertiary to Recent magmatism in the Central Volcanic Zone have mainly focused on large stratovolcanoes. This is because mafic minor volcanic centres and related flows that formed during a single eruption are relatively rare and occur in locally clusters (e.g. Andagua/Humbo fields in S. Peru, Delacour et al., 2007; Negrillar field in N. Chile, Deruelle 1982) or in the back arc region (Davidson and de Silva, 1992). These studies showed that the "monogenetic" lavas are high-K calc-alkaline and their major, trace, and rare elements, as well as Sr-, Nd- and Pb- isotopes data display a range comparable to those of the Central Volcanic Zone composite volcanoes (Delacour et al., 2007). It has been argued that the eruptive products of these minor centers bypass the large magma chamber systems below Andean stratovolcanoes and thus may represent magmas that were derived from a deeper level in the crust (Davidson and de Silva, 1992; Ruprecht and Wörner, 2007). This study represents a continuation of our work to understand the regional variation in erupted magma composition in the Central Andes (Mamani et al., 2008; Wörner et al., 1992). -
Geology of the South-Central Pueblo Mountains, Oregon-Nevada
AN ABSTRACT OF THE THESIS OF WINTHROP ALLEN ROWE for the MASTER OF SCIENCE (Name) (Degree) in GEOLOGY presented on lurd IL 1q4() Major) (Sate) Title: GEOLOGY OF THE SOUTH-CENTRAL PUEBLO MOUNTAINS, OREGON-NEVADA Abstract approved: Redacted for Privacy Dr. Harold E. En lows The thesis area consists of 33 square miles in the south-central Pueblo Mountains of Humboldt County, Nevada and Harney County, Oregon.The Pueblo Mountains are tilted fault block mountains found in the extreme northwestern part of the Basin and Range province and were produced during Early Tertiary Basin and Range orogeny. Northwest and northeast trending faults of Late Tertiary time have since cut the entire stratigraphic sequence. The oldest rocks exposed are metamorphosed Permian to Triassic eugeosynclinal sedimentary rocks.The metamorphic sequence is intruded by several granitic plutons of Late Jurassic to Middle Cretaceous age. A thick sequence of Miocene basalt flows unconformably overlies the pre- Tertiary rocks. A slight angular unconformity separates the basalt sequence from overlying Miocene tuffaceous sedimentary rocks, sillar flows, and welded tuffs. Unconsolidated deposits of Quaternary alluvium include alluvial fan and lacustrine sediments. Mineralization within the area includes several gold prospects, a mercury prospect, and a possible copper deposit.The copper prospect consists of a large gossan (6, 000 feet by 3, 000 feet). Mineralization and alteration from a Cretaceous porphyritic quartz monzonite intrusion has produced potassic and quartz sericite -
Neogene Ignimbrites in the Area of Arequipa Southern Peru
NEOGENE IGNIMBRITES IN THE AREA OF AREQUIPA, SOUTHERN PERU: CORRELATIONS BASED ON FIELD OBSERVATIONS, GEOCHElVIISTRY AND GEOCHRONOLOGY Perrine PAQUEREAU (1), Jean-Claude THOURET (1), Gerhard WORNER (2), and Michel FORNARl (3) (1) Laboratoire Magmas et Volcans, Universite Blaise Pascal et CNRS, 63038 Clermont-Ferrand, France ([email protected]) ([email protected] -bpclermont.fr) (2) GZG, Abt. Geochemie, Goldschmidstrasse 1, Universitat Gottingen, 37077 Gottingen, Germany ([email protected]) (3) IRD, UMR Geosciences Azur, Sophia Antipolis, Pare Valrose, 06108 Nice cedex 2, France ([email protected]) KEY WORDS: ignimbrite, Arequipa, Peru, correlation, mineralogy, chronology. INTRODUCTION In the area of Arequipa, the ignimbrites termed "sillars" (Fenner, 1948; Jenks and Goldich, 1956) are indurated, generally nonwelded pyroclastic-flow deposits of dacitic and rhyolitic composition and middle Miocene to late Pliocene in age (this study). They encompass incipiently welded or sintered vitric tuffs, indurated by vapor-phase crystallisation, and previously welded but devitrified tuffs. They mantle an area of roughly 600 km2 around the quaternary stratovolcanoes of Chachani and Misti and they fill the depression of Arequipa with a thickness of 100 m to as much as 200 m in the Rio Chili canyon (Fig. 1). Similar ignimbrites 461 have flowed downvalley the Rio Chili and Rio Yura at least 30 km south and southwest of Arequipa beyond the confluence ofthe three rivers into the Rio Vitor canyon. Figure 2 shows two stratigraphic sections in the valley of Rio Chili that cuts the flank of the Western Cordi1lera. They encompass COMPOSITE SECTION RIOCHILl, EASTSIDE,CHARCANI two ignimbrite _'" cooling units above lyJ fT' Misti lava flows 0.83 Ma T, 00000 scona flow deposit the Jurassic ~----- nonwelded ignimbrite "pre-Misti" basement: the lavallOW ..... -
Glacier Evolution in the South West Slope of Nevado Coropuna
Glacier evolution in the South West slope of Nevado Coropuna (Cordillera Ampato, Perú) Néstor Campos Oset Master Project Master en Tecnologías de la Información Geográfica (TIG) Universidad Complutense de Madrid Director: Prof. David Palacios (UCM) Departamento de Análisis Geográfico Regional y Geografía Física Grupo de Investigación en Geografía Física de Alta Montaña (GFAM) ACKNOWLEDGEMENTS I would like to gratefully and sincerely thank Dr. David Palacios for his help and guidance during the realization of this master thesis. I would also like to thank Dr. José Úbeda for his assistance and support. Thanks to GFAM-GEM for providing materials used for the analysis. And last but not least, a special thanks to my family, for their encouragement during this project and their unwavering support in all that I do. 2 TABLE OF CONTENTS CHAPTER 1 INTRODUCTION...................................................................................... 4 1.1 Geographic settings ................................................................................................ 4 1.2 Geologic settings .................................................................................................... 6 1.3 Climatic setting....................................................................................................... 8 1.4 Glacier hazards ..................................................................................................... 10 1.5 Glacier evolution ................................................................................................. -
Field T Rip Guide Book
Volume n° 3 - from D01 to P13 32nd INTERNATIONAL GEOLOGICAL CONGRESS IGNIMBRITIC DEPOSITS IN CENTRAL ITALY: PYROCLASTIC PRODUCTS OF THE QUATERNARY AGE AND ETRUSCAN FOOTPATHS Leader: G. Nappi Associate Leaders: L. Valentini, M. Mattioli Field Trip Guide Book - P09 Field Trip Florence - Italy August 20-28, 2004 Post-Congress P09 P09_copertina_R_OK C 25-05-2004, 9:25:21 The scientific content of this guide is under the total responsibility of the Authors Published by: APAT – Italian Agency for the Environmental Protection and Technical Services - Via Vitaliano Brancati, 48 - 00144 Roma - Italy Series Editors: Luca Guerrieri, Irene Rischia and Leonello Serva (APAT, Roma) English Desk-copy Editors: Paul Mazza (Università di Firenze), Jessica Ann Thonn (Università di Firenze), Nathalie Marléne Adams (Università di Firenze), Miriam Friedman (Università di Firenze), Kate Eadie (Freelance indipendent professional) Field Trip Committee: Leonello Serva (APAT, Roma), Alessandro Michetti (Università dell’Insubria, Como), Giulio Pavia (Università di Torino), Raffaele Pignone (Servizio Geologico Regione Emilia-Romagna, Bologna) and Riccardo Polino (CNR, Torino) Acknowledgments: The 32nd IGC Organizing Committee is grateful to Roberto Pompili and Elisa Brustia (APAT, Roma) for their collaboration in editing. Graphic project: Full snc - Firenze Layout and press: Lito Terrazzi srl - Firenze P09_copertina_R_OK D 25-05-2004, 9:24:28 Volume n° 3 - from D01 to P13 32nd INTERNATIONAL GEOLOGICAL CONGRESS IGNIMBRITIC DEPOSITS IN CENTRAL ITALY: PYROCLASTIC PRODUCTS OF THE QUATERNARY AGE AND ETRUSCAN FOOTPATHS AUTHORS: G. Nappi, L. Valentini, M. Mattioli (Università di Urbino - Italy) Florence - Italy August 20-28, 2004 Post-Congress P09 P09_R_OK A 25-05-2004, 9:28:38 Front Cover: Necropolis of Sovana, Tomba Ildebranda. -
Evaluación De Seguridad Física De Áreas Aledañas Al Volcán Ubinas
INSTITUTO GEOLÓGICO MINERO Y METALÚRGICO DIRECCIÓN DE GEOLOGÍA AMBIENTAL EVALUACIÓN DE SEGURIDAD FÍSICA DE ÁREAS ALEDAÑAS AL VOLCÁN UBINAS POR: JERSY MARIÑO SALAZAR MARCO RIVERA PORRAS LOURDES CACYA DUEÑAS VICENTINA CRUZ PAUCCARA Septiembre, 2006 EVALUACIÓN DE SEGURIDAD FÍSICA DE ÁREAS DE INFLUENCIA DEL VOLCÁN UBINAS ÍNDICE RESUMEN 1. INTRODUCCIÓN 2. UBICACIÓN Y CARACTERÍSTICAS GENERALES 3. GEOLOGÍA DEL VOLCÁN UBINAS 3.1. Ubinas I (~800,000 – 370,000 años) 3.2. Ubinas II (370,000 a tiempos históricos) 4. EVALUACIÓN DE LA ACTIVIDAD HISTÓRICA 5. CARACTERÍSTICAS DE LA ERUPCIÓN DEL AÑO 2006 5.1. Efectos en el medio ambiente producidos por la erupción del volcán Ubinas del año 2006 6. PRINCIPALES PELIGROS VOLCÁNICOS DEL UBINAS 6.1 Peligros por caídas o lluvias de cenizas y escoria 6.2. Peligros por flujos piroclásticos (mezcla de cenizas, fragmentos de rocas y gases a alta temperatura) 6.3. Peligros por flujos de barro (huaycos) y desbordes 6.4. Peligros por el colapso de flanco sur y generación de avalanchas de escombros 6.5. Peligros por flujos de lava 7. MAPA DE PELIGROS VOLCÁNICOS 8. EVALUACIÓN DE SEGURIDAD FÍSICA DE ÁREAS ALEDAÑAS AL VOLCÁN UBINAS 9. CONCLUSIONES Y RECOMENDACIONES 9.1. Conclusiones 9.2. Recomendaciones Referencias citadas Anexo RESUMEN El volcán Ubinas se encuentra localizado en el departamento de Moquegua, a 90 km al Norte de la ciudad de Moquegua y a 65 km al Este de la ciudad de Arequipa (16º 22' S, 70º 54' O; 5,672 msnm.). El Ubinas es el volcán más activo del sur peruano, debido a que en los últimos 500 años ha presentado hasta 24 erupciones de baja a moderada magnitud. -
Geochemical Characterization and Fission Track
Geochemical characterization and fission track ages of historical ignimbrite flows : the sillar of Arequipa (Western cordillera, Southern Peru) Nicole Vatin Perignon, Gérard Poupeau, Richard Oliver, Ludovic Bellot-Gurlet, Erika Labrin, Francine Keller, Salas Guido To cite this version: Nicole Vatin Perignon, Gérard Poupeau, Richard Oliver, Ludovic Bellot-Gurlet, Erika Labrin, et al.. Geochemical characterization and fission track ages of historical ignimbrite flows : the sillarof Arequipa (Western cordillera, Southern Peru). Géodynamique andine : résumés étendus, ORSTOM, pp.461-464, 1993, Géodynamique Andine : Symposium International 2, Oxford (UK), 21-23 october 1993, 2-7099-1154-X. hal-02133522 HAL Id: hal-02133522 https://hal.archives-ouvertes.fr/hal-02133522 Submitted on 18 May 2019 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. Second ISAG, Oxford (UK),21 -23f911993 461 GEOCHEMICAL CHARACTERIZATION AND FISSION TRACK OFAGES HISTORICAL IGNIMBRITE FLOWS: THE SILLAR OF AREQUIPA (WESTERN CORDILLERA, SOUTHERN PERU) ATIN-PERIGNON( 1, Gérard PO ( 1, Richar?, p. OLIVERNico1?2Y , Ludovic BELL T-GURLET ('1 yPyril@)LABRIN , Francine KELLER?' ) & Guido SALAS A . (1) Laboratoire de Géologie,UA 69 CNRS, Université Joseph- Fourier, 15, rue Maurice Gignoux, 38031 Grenoble Cedex, France (2) Institut Laüe-Langevin, B.P.I56X, Avenue des Martyrs, 38042 Grenoble Cedex, France (3) Universidad Nacional San Agustin, Casilla 1203, Areq- uipa, PerG RESUMEN El SA tufo corresponde a unahica venida volchica de en- friamiento con dos unidades. -
Fecha: Abril De 2020
INFORME VULCANOLÓGICO 1 Fecha: abril de 2020 Instituto Geofísico del Perú Presidente Ejecutivo: Hernando Tavera Director Científico: Danny Scipión Informe vulcanológico IGP/CENVUL-UBI/IV 2020-0001 La actividad sísmica en el volcán Ubinas y su variación temporal (1998-2019) para la identificación de patrones de sismicidad a ser considerados en la gestión del riesgo de desastres Autores: José Alberto Del Carpio Calienes José Luis Torres Aguilar Este informe ha sido producido por el Instituto Geofísico del Perú Calle Badajoz n.° 169, Mayorazgo, Ate Teléfono: 51-1-3172300 2 RESUMEN Durante los últimos veinte años, el volcán Ubinas ha registrado tres periodos eruptivos: 2006- 2009, 2013-2017, 2019-actualidad. El Instituto Geofísico del Perú (IGP), gracias a la red de monitoreo implementada en este macizo, ha logrado registrar y analizar un total de 594 705 señales sísmicas, de las cuales el 38 % corresponde a eventos de tipo Volcano-Tectónico (VT), ligadas al fracturamiento de rocas, mientras que el 32.5 % corresponde a eventos de tipo Largo Periodo (LP) y Tornillo que estarían asociados a la circulación de fluidos volcánicos (magma, gases) al interior del volcán. Además, durante todo el periodo de análisis se han registrado un total de 38 979 señales sísmicas de tipo Híbrido que estarían relacionadas al ascenso de magma. En cuanto a las explosiones volcánicas, definidas sísmicamente como señales de gran energía, se han acumulado un total de 852 eventos. Durante la actividad eruptiva 2006-2009, se han identificado tres periodos de actividad: (i) el primero ligado al inicio de la erupción, durante el cual se registró una mayor actividad explosiva; (ii) un segundo periodo con el registro de explosiones que continuaron ocurriendo debido a nuevos ascensos de magma inferidos por el registro de señales de tipo Híbrido, aunque disminuidas en número; y (iii) leve actividad sísmica, ligada a explosiones esporádicas ocurridas al final de la erupción.