DOCSLIB.ORG

University of Nevada Reno Faulting and Tectonics in the Foreland Basin

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
University of Nevada Reno Faulting and Tectonics in the Foreland Basin University of Nevada Reno J Faulting and Tectonics in the Foreland Basin Fold/Thrust Belt of the San Juan Province, Argentina, and a Comparison to the Yakima Fold/Thrust Belt of the Northwestern United States A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Geology by Robert A. Whitney January, 1991 1 MINES library T he s is The dissertation of Robert A. Whitney is approved: 275S University of Nevada Reno January, 1991 ABSTRACT The San Juan Province of west-central Argentina lies in a region of crustal shortening, the result of sub­ horizontal subduction in the Peru-Chile trench to the west. This crustal shortening is manifest as a north-south trending fold/thrust belt affecting the western edge of the South American craton and the adjacent continental slope. Shortening is accomplished on flattening thrusts, with decollement at moderate depths, controlled by bedrock lithology. Seismicity occurs in the subducted slab as Benioff zone seismicity and in the upper portions of the continental crust. A major strike-slip fault separates the foreland basin/craton shortening from the Andes uplift. The crustal shortening episode began about 9 Ma, but Quaternary activity is limited to the western edge of the craton and the eastern edge of the Paleozoic continental shelf. Historically, large earthquakes in the fold/thrust belt have not produced primary surface rupture, but secondary rupture on bending moment faults has occurred, both normal and reverse in mechanism. This phenomena indicates small secondary displacements can be indicative of very large events. The pattern of bending moment fault hypocenters complicates efforts to determine the geometry of the causative fault and to choose the correct focal plane solution iii The Yakima fold/thrust belt of the northwestern U.S. is an area undergoing north-south crustal shortening similar to that in South America, although less active by about an order of magnitude. Comparison between the two regions indicates fault geometry and structure resulting from the crustal shortening are similar. Seismic risk analyses in the Columbia Plateau region have underestimated earthquake hazard by using incorrect models for the faulting and failing to consider the possibility of large magnitude events that do not have primary surface rupture. i iv CONTENTS Page ABSTRACT ii FIGURES vi PLATES viii INTRODUCTION 1 Purpose and Scope 1 Climate and Vegetation 5 Study Methods 7 Previous Work 7 Acknowledgements 8 REGIONAL GEOLOGIC SETTING 11 Physiographic Description 11 Plate Geometries and Movement 12 GEOLOGIC HISTORY 22 Introduction 22 Frontal Cordillera 22 Precordillera 25 Western Precordillera 26 Eastern Precordillera 28 Western Pampean Ranges 29 STRUCTURE WITHIN THE MORPHOSTRUCTURAL PROVINCES 31 Frontal Andes-Western Precordillera Boundary 31 Western Precordillera 48 North of the San Juan River 48 Sierra del Tigre 49 Sierra de la Invernada 50 Sierra del Talacasto 51 Sierras la Cantera 52 Sierras de Dehesa 52 South of the San Juan River 53 Sierra Tontal 53 Cordon de Espiracito 54 Sierra Alta de Zonda 54 Eastern Precordillera 60 North of the San Juan River 61 Sierra de Villicum 61 Lomas de las Tapias 63 South of the San Juan River-Sierra Chica de Zonda 64 V CONTENTS (cont) Page Western Pampean Ranges 72 Sierra Pie de Palo 72 Sierra de Valle Fertil 90 Other Precambrian Outcrops 91 Bermejo Valley 92 Interprovincial Border Characteristics 94 Western-Eastern Precordillera Boundary Zone 94 Eastern Precordillera-Pampean Boundary Zone 95 GEOTECTONIC SYNTHESIS 98 NOTES ON THRUST FAULTING 104 Bending Moment Faulting 104 Aftershock Determination of Fault Geometry 114 COMPARISON TO THE YAKIMA FOLD/THRUST BELT 117 Introduction 117 Geologic Background 117 Models of Fold/Thrust Geometry 120 Age of Deformation 124 Seismic Risk in the Pasco Basin 127 Observations 130 SUMMARY AND CONCLUSIONS 132 REFERENCES 136 APPENDIX A 146 vi FIGURES Figure Page 1. Southern South America showing location of the San Juan Province and the study area. 2 2. Location map of the Yakima fold/thrust belt showing the Pasco basin. 4 3. Two cross-sections showing inferred geometries of descending Nazca plate and continental South American plate in central Peru and northern Chile. 14 4. Cross-section of earthquake hypocenters for South America between about latitudes 28 and 30 degrees south. 15 5. Peru-Chile subduction zone. 17 6. Globally reconstructed positions of the Nazca plate indicated by the Nazca and Juan Fernandez ridges, relative to South America. 19 7. Plate configuration 50-60 Ma for the western United States. 21 8. Generalized geologic map of the study region showing morphostructural provinces. 23 9. Stereographic aerial photographs of the El Tigre fault in the west-central study area. 33 10. Stereographic aerial photographs of the El Tigre fault in the west-central study area. 34 11. Stereographic aerial photographs of the El Tigre fault in the west-central study area. 35 12. Reconnaissance map of the El Tigre fault from geologic interpretation aerial photos of Figures 9, 10 and 11. 36 13. Low-sun angle photograph of the scarp of the El Tigre fault in the location of trench 2. 37 14. Stereographic aerial photographs of the falla del Tigre about 14 miles (22 km) north of the San Juan river. 38 vii FIGURES (cont.) 15. Block diagram, plan of vectors and parameters used to describe plate motions at a subduction zone. 45 16. Generalized structural map of sequence of folding- faulting-folding found in the Sierra Alta de Zonda. 56 17. Photograph of the south end of Sierra Alta de Zonda. 57 18. Block diagram of possible planar rotation of bedrock in plunging anticlines. 58 19. Photograph of normal fault graben formation in the north wall of the spillway of the Dique de Ullun. 65 20. Generalized structural map of region of the Dique de Ullun. 66 21. Thrusting just south of the south abutment of the Dique de Ullun. 68 22. Trench in colluvium on the main thrust surface for Sierra Chica de Zonda. 70 23. Photograph of stacked thrust sheets forming the north end of the Sierra Chica de Zonda. 71 24. Generalized structural map of the Sierra Pie de Palo. 74 25. Preliminary map of surface rupture from 1977 earthquake from photogeologic interpretation of Figure 27 photos. 75 26. Stereographic aerial photographs of the Niquizanga fault zone of southeastern Sierra Pie de Palo. 76 27. Photograph of the northeast flank of Sierra Pie de Palo showing the overthrusting of the east limb of the anticline by Tertiary and Quaternary valley sediments. 77 viii FIGURES (cont.) Figure Page 28. Photograph of displacement from the 1977 earthquake on an abandoned road across the Niquizanga fault zone. 79 29. Photograph of trench 10 across a graben of the Niquizanga fault zone. 80 30. Photograph of Trench 11 excavation of the scarp of the Pajarito fault zone. 84 31. Stereographic aerial photographs of the Pajarito fault zone. 85 32. Photograph of road on graben wall in Sierra Pie de Palo. 87 33. Photograph of horizontal Quaternary alluvium overlying vertical Quaternary alluvium in Campo de Matagusanos. 96 34. Generalized structural cross-section A-A'. 102 35. Diagram of fold axis parallel-bending moment graben formation. 105 36. Diagram of fold axis perpendicular-bending moment graben formation. 107 37. Diagram of opposite dip-bending moment thrust formation. 109 38. Diagram of same dip-bending moment thrust formation. 110 39. Diagram of flexural slip-bending moment faulting. 113 40. Stratigraphic column for the Saddle Mountains. 119 41. Proposed models for the Wind River thrust fault. 121 42. Photograph of the Pomona flow in the south limb of the Saddle Mountains anticline. 123 PLATES Plate 1. Quaternary fault map of a portion of the San Juan Province, Argentina. In Pocket 1 INTRODUCTION Purpose and Scope The San Juan Province of Argentina (Fig. 1) is an area with very active tectonism, whose major geomorphic expression is compressional horst-and-graben mountain ranges. These ranges and intervening valleys form the foreland basin fold/thrust belt known as the Precordillera and the fold/thrust ranges on the western edge of the South American craton known as the Pampean ranges. This study was undertaken to better delineate the structural geometry within the province and to delineate active faulting within the province for the purposes of seismic risk. This will aid to better understand geologic structure and potential earthquake size and mechanism in compressional tectonic regimes in this and other parts of the world. Other areas of compressional tectonics which may be similar in deformational style to the San Juan Province include the Yakima fold/thrust belt in the Columbia Plateau, the El Asnam, Algeria, area, and the folding and associated seismic activity in the Great Valley-Coastal Range boundary zone in California, as in the Coalinga area. I While deformational style of these areas may be similar, causative tectonics are not considered. In addition, it is believed that the geologic structure in older fold/thurst belts, such as the Laramide overthrust belt and Figure 1. Southern South America showing location of the San Juan Province and the study area. 3 the fold/thrust belt of the foreland basin of the Appalachian orogeny, may be better understood by comparison to the presently forming structures in the San Juan Province. As an example of this type of comparison, the structure and tectonics of the Yakima fold/thrust belt of the northwestern United States (Fig. 2) is discussed and compared to those in the San Juan Province. The fieldwork for the Argentine portion of this study was accomplished in the Precordillera and Pampean Ranges and along the eastern border of the Andes Cordillera in the southern and eastern portions of the San Juan Province (Fig. 1, Pi.
Load more

Recommended publications
  • Late Quaternary Morphodynamics in the Quebrada De Purmamarca, NW Argentina
    Quaternary Science Journal GEOZON SCIENCE MEDIA Volume 59 / Number 1–2 / 2010 / 21–35 / DOI 10.3285/eg.59.1-2.02 ISSN 0424-7116 E&G www.quaternary-science.net Late Quaternary morphodynamics in the Quebrada de Purmamarca, NW Argentina Jan-Hendrik May, Ramiro Daniel Soler Abstract: � This study aims to document the geomorphic, sedimentary and paleopedogenic archives in the Quebrada de Purmamarca.The paleoenvironmental interpretation of these archives and the reconstruction of landscape evolution are mainly based on field observations and geomorphological mapping (May 2008). A series of aggradational terraces mostly consisting of coarse debris- flow deposits are the main focus of this investigation. While the associated cut-and-fill processes are probably the result of an interplay between climatic and tectonic controls, the deposition of the youngest terrace level (> 150 m thickness) may likely be attributed to a drop of the periglacial belt of more than 1000 meters below its modern elevation. For the time after terraceac- cumulation has ceased, the interpretation of alluvial fans, aeolian sand and a well-developed paleosol points to Late Quaternary humidity changes as an important control on landscape evolution. The major phase of downcutting and incision significantly postdates the end of terrace deposition and may have been triggered by markedly increased amounts of monsoonal precipita- tion. Finally, minor humidity changes of possible Holocene age are indicated by paleopedogenic and geomorphic observations on terrace surfaces and along valley slopes. (Spätquartäre Morphodynamik in der Quebrada de Purmamarca, NW Argentina) Kurzfassung: Ziel dieser Arbeit ist die Dokumentation geomorphologischer, sedimentärer und paläopedologischer Archive in der Quebrada de Purmamarca.
    [Show full text]
  • Presentación De Powerpoint
    S11D-0385: Three major faults in northeastern Colombia (Sierra Nevada de Santa Marta & Perija Range): seismotectonic model and scope of its seismic hazard Germán Chicangana 1, Andreas Kammer 2, Hector Mora - Páez 3, Carlos Alberto Vargas 2, Augusto Gómez - Capera 4. 1. Universidad Santo Tomas, Villavicencio, Colombia. 2. Universidad Nacional de Colombia, Bogotá D.C., Colombia. 3. Servicio Geológico Colombiano, Bogotá D.C., Colombia. 4..Istituto Nazionale di Geofísica e Vulcanologia, Milano, Italy. ABSTRACT 2. REGIONAL GEOLOGY 3. HISTORICAL EARTHQUAKE In the northeasternCORO Colombia, the northernmost foothills of the Andes are present, whose representatives are 1. LOCATION the Sierra Nevada de Santa Marta (SNSM) and the Perija Range. This orogenic system is delimited by three major faults that limit three large basins. In its order from west to east are the Santa Marta Fault that limits the Sierra Nevada de Santa Marta with the Lower Magdalena Basin. The Oca Fault that limits with the low basin of the Rancheria River to the north in the south of Guajira Peninsula, and toward the east the Perija – El Tigre Fault that limits with the Maracaibo Basin. Each of these faults have a great size. Since 2008, when the National Seismological Network of Colombia (RSNC) increased its number of seismological stations in this region of Colombia, the recording of surface seismicity that is associated with the tectonic mobility of this orogenic system began. The strong earthquakes in this region do not exceed in magnitude M = 5.5, emphasizing earthquakes with M ≈ 4.5 in average. The origin of the tectonic mobility of this orogenic system obeys to the convergence between the Caribbean Plate and the northwestern corner of South America.
    [Show full text]
  • Crustal-Seismicity.Pdf
    Tectonophysics 786 (2020) 228450 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Crustal seismicity in the Andean Precordillera of Argentina using seismic broadband data T ⁎ Agostina Venerdinia,b, , Patricia Alvaradoa,b, Jean-Baptiste Ammiratia,1, Marcos Podestaa, Luciana Lópezc, Facundo Fuentesd, Lepolt Linkimere, Susan Beckf a Grupo de Sismotectónica, Centro de Investigaciones de la Geósfera y la Biósfera (Consejo Nacional de Investigaciones Científicas y Técnicas CONICET– Facultad de Ciencias Exactas, Físicas y Naturales, UNSJ), San Juan, Argentina b Departamento de Geofísica y Astronomía, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina c Instituto Nacional de Prevención Sísmica, San Juan, Argentina d YPF S.A., Buenos Aires, Argentina e Escuela Centroamericana de Geología, Universidad de Costa Rica, San José, Costa Rica f Department of Geosciences, University of Arizona, Tucson, AZ, United States ARTICLE INFO ABSTRACT Keywords: In this study, we analyze 100 crustal Precordilleran earthquakes recorded in 2008 and 2009 by 52 broadband Crust seismic stations from the SIEMBRA and ESP, two temporary experiments deployed in the Pampean flat slab Focal mechanism region, between the Andean Cordillera and the Sierras Pampeanas in the Argentine Andean backarc region. Fold-thrust belt In order to determine more accurate hypocenters, focal mechanisms and regional stress orientations, we Andean retroarc relocated 100 earthquakes using the JHD technique and a local velocity model. The focal depths of our relocated Flat slab events vary between 6 and 50 km. We estimated local magnitudes between 0.4 ≤ M ≤ 5.3 and moment South America L magnitudes between 1.3 ≤ Mw ≤ 5.3.
    [Show full text]
  • Seismic Hazard, Risk, and Design for South America by Mark D
    Bulletin of the Seismological Society of America, Vol. 108, No. 2, pp. 781–800, April 2018, doi: 10.1785/0120170002 Seismic Hazard, Risk, and Design for South America by Mark D. Petersen, Stephen C. Harmsen, Kishor S. Jaiswal, Kenneth S. Rukstales, Nicolas Luco, Kathleen M. Haller, Charles S. Mueller, and Allison M. Shumway Abstract We calculate seismic hazard, risk, and design criteria across South America using the latest data, models, and methods to support public officials, sci- entists, and engineers in earthquake risk mitigation efforts. Updated continental scale seismic hazard models are based on a new seismicity catalog, seismicity rate models, evaluation of earthquake sizes, fault geometry and rate parameters, and ground- motion models. Resulting probabilistic seismic hazard maps show peak ground accel- eration, modified Mercalli intensity, and spectral accelerations at 0.2 and 1 s periods for 2%, 10%, and 50% probabilities of exceedance in 50 yrs. Ground shaking soil amplification at each site is calculated by considering uniform soil that is applied in modern building codes or by applying site-specific factors based on VS30 shear- wave velocities determined through a simple topographic proxy technique. We use these hazard models in conjunction with the Prompt Assessment of Global Earth- quakes for Response (PAGER) model to calculate economic and casualty risk. Risk is computed by incorporating the new hazard values amplified by soil, PAGER fra- gility/vulnerability equations, and LandScan 2012 estimates of population exposure. We also calculate building design values using the guidelines established in the build- ing code provisions. Resulting hazard and associated risk is high along the northern and western coasts of South America, reaching damaging levels of ground shaking in Chile, western Argentina, western Bolivia, Peru, Ecuador, Colombia, Venezuela, and in localized areas distributed across the rest of the continent where historical earth- quakes have occurred.
    [Show full text]
  • PDF Linkchapter
    Index Page numbers in italic denote Figures. Page numbers in bold denote Tables. Abanico extensional basin 2, 4, 68, 70, 71, 72, 420 Andacollo Group 132, 133, 134 basin width analogue modelling 4, 84, 95, 99 Andean margin Abanico Formation 39, 40, 71, 163 kinematic model 67–68 accommodation systems tracts 226, 227, 228, 234, thermomechanical model 65, 67 235, 237 Andean Orogen accretionary prism, Choapa Metamorphic Complex development 1, 3 20–21, 25 deformation 1, 3, 4 Aconcagua fold and thrust belt 18, 41, 69, 70, 72, 96, tectonic and surface processes 1, 3 97–98 elevation 3 deformation 74, 76 geodynamics and evolution 3–5 out-of-sequence structures 99–100 tectonic cycles 13–43 Aconcagua mountain 3, 40, 348, 349 uplift and erosion 7–8 landslides 7, 331, 332, 333, 346–365 Andean tectonic cycle 14,29–43 as source of hummocky deposits 360–362 Cretaceous 32–36 TCN 36Cl dating 363 early period 30–35 aeolian deposits, Frontal Cordillera piedmont 299, Jurassic 29–32 302–303 late period 35–43 Aetostreon 206, 207, 209, 212 andesite aggradation 226, 227, 234, 236 Agrio Formation 205, 206, 207, 209, 210 cycles, Frontal Cordillera piedmont 296–300 Chachahue´n Group 214 Agrio fold and thrust belt 215, 216 Neuque´n Basin 161, 162 Agrio Formation 133, 134, 147–148, 203, Angualasto Group 20, 22, 23 205–213, 206 apatite ammonoids 205, 206–211 fission track dating 40, 71, 396, 438 stratigraphy 33, 205–211 (U–Th)/He thermochronology 40, 75, 387–397 Agua de la Mula Member 133, 134, 205, 211, 213 Ar/Ar age Agua de los Burros Fault 424, 435 Abanico Formation
    [Show full text]
  • The Argentine Precordillera: a Foreland Thrust Belt Proximal to the Subducted Plate
    The Argentine Precordillera: A foreland thrust belt proximal to the subducted plate Richard W. Allmendinger and Phoebe A. Judge Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, New York 14853, USA ABSTRACT of constructing balanced cross sections with- thickening in the lower crust, much as described out worrying about exactly where lower crustal by Bird (1988) for the Laramide Rocky Moun- The Precordillera thrust belt of west- shortening commences, how the transition from tain foreland of the western United States. ern Argentina is anomalously close, both upper crustal to whole crust shortening occurs, horizontally and vertically, to the coeval or even how the thrust plates will restore relative TECTONIC AND GEOLOGIC SETTING subduction zone of the Nazca plate. The to the trench. thin-skinned part of the belt has an unusu- The Precordillera thrust belt of western The Argentine Precordillera overlies a region ally deep décollement that is well defi ned by Argentina, in contrast, is located 350 km from of fl at subduction of the Nazca plate (Cahill industry seismic refl ection and recent broad- the Chile Trench and just 100 km above the and Isacks, 1992; Gans et al., 2011) located at band experiments. New area and line-length subducted Nazca plate. Thus the amount of the southern end of the Central Andes (Fig. 1). balanced cross sections show that the cen- crust to work with when attempting to bal- This region of fl at subduction has been linked tral Precordillera has accrued ~90 ± 21 km ance the shortening in the thrust belt is signifi - to the subduction of the Juan Fernández Ridge, of shortening since 13 Ma; much of that cantly less than elsewhere, raising questions which, because of a dogleg in its now sub- shortening occurred between 12 and 9 Ma.
    [Show full text]
  • Microbialitas Lacustres De Secuencias Triásicas De Argentina
    Tesis Doctoral Microbialitas lacustres de secuencias triásicas de Argentina Benavente, Cecilia Andrea 2014-03-06 Este documento forma parte de la colección de tesis doctorales y de maestría de la Biblioteca Central Dr. Luis Federico Leloir, disponible en digital.bl.fcen.uba.ar. Su utilización debe ser acompañada por la cita bibliográfica con reconocimiento de la fuente. This document is part of the doctoral theses collection of the Central Library Dr. Luis Federico Leloir, available in digital.bl.fcen.uba.ar. It should be used accompanied by the corresponding citation acknowledging the source. Cita tipo APA: Benavente, Cecilia Andrea. (2014-03-06). Microbialitas lacustres de secuencias triásicas de Argentina. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Cita tipo Chicago: Benavente, Cecilia Andrea. "Microbialitas lacustres de secuencias triásicas de Argentina". Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 2014-03-06. Dirección: Biblioteca Central Dr. Luis F. Leloir, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Contacto: [email protected] Intendente Güiraldes 2160 - C1428EGA - Tel. (++54 +11) 4789-9293 UNIVERSIDAD DE BUENOS AIRES FACULTAD DE CIENCIAS EXACTAS Y NATURALES DEPARTAMENTO DE CIENCIAS GEOLÓGICAS Microbialitas lacustres de secuencias triásicas de Argentina Tesis para optar por el título de Doctor de la Universidad de Buenos Aires en el área de Ciencias Geológicas Lic. Cecilia Andrea Benavente Directora de Tesis: Dra. Nora Graciela Cabaleri Directora Asistente: Dra. Adriana Cecilia Mancuso Consejero de Estudios: Dr. Sergio Marenssi Ciudad Autónoma de Buenos Aires, 2013 Cambiaré de opinión tantas veces y tan a menudo como adquiera conocimientos nuevos, el día que me aperciba que mi cerebro ha dejado de ser apto para esos cambios, dejaré de trabajar.
    [Show full text]
  • Carlos H. Costa - Curriculum Vitae
    Carlos H. Costa - Curriculum Vitae CURRICULUM VITAE Carlos Horacio COSTA Lugar y fecha de nacimiento: Bahía Blanca (Argentina), 30/08/1955. Pasaporte: 11.794.024 N (Argentina), DNI: 11.794.024, CUIL/CUIT 20-11794024-2 Domicilio laboral: Ejército de los Andes 950, 5700 San Luis, Argentina [email protected] - http://www.unsl.edu.ar TE: 54 266 45200300-Int.2525; 54 266 4459128 (part), 54 266 4485023 (cel.) FORMACIÓN ACADÉMICA . Licenciado en Ciencias Geológicas, Universidad Nacional de San Luis (UNSL), 1981. Fotogeólogo. Centro Interamericano de Fotointerpretación (CIAF), Colombia, 1982. Doctor en Ciencias Geológicas, Universidad Nacional de San Luis, 1992. POSICIÓN ACTUAL . Profesor Titular Exclusivo Efectivo, Universidad Nacional de San Luis, Argentina ÁREAS DE INTERÉS . Neotectónica, paleosismología, análisis de la fracturación y macizos rocosos, peligro sísmico, neotectónica de los Andes y Sierras Pampeanas, geología estructural aplicada a obras de ingeniería. PRINCIPAL EXPERIENCIA PROFESIONAL . Asesor de campo, Curso Internacional para Ingenieros Civiles, CIAF, Colombia, 1983. Geólogo responsable Proyecto Vial del Río Margua, Convenio CIAF-MOPT, Colombia, 1983-84. Investigador Invitado Fundación Venezolana de Investigaciones Sismológicas (FUNVISIS) proyectos "Amenaza Sísmica en la región del Lago de Valencia (para el Gob. Estado Lara) y "Riesgo sísmico en la región del Proyecto Sumandes II (para INTEVEP-Petróleos de Venezuela), 1988. Jefe de Proyecto. Relevamiento Hojas Geológicas 1:250.000: 3366-I San Francisco, 3366-II Santa Rosa, 3366-III San Luis y 3366-IV Villa Mercedes. SEGEMAR, 1994-2001. Responsable de “Deformaciones Cuaternarias y Riesgo Sísmico”. Hoja de Peligrosidad Geológica 3369-I, Mendoza. SEGEMAR, 2001. Invited Senior Researcher del Institute of Geological and Nuclear Sciences collaborative research, New Zealand, 2001.
    [Show full text]
  • Special P Aper
    ISSN: 207-9656 November 2011 - Volume 1 - Number 1 Special Issue LL11-02SP Published on behalf of the Latin American Association of Paleomagnetism and Geomagnetism by the Instituto de Geofisica, Universidad Nacional Autónoma de México. Proceedings of Second Biennial Meeting of LATINMAG, Tandil, Argentina November 2011 4 short courses 13 invited lectures 85 regular presentations Latinmag Letters can be viewed and copied free of charge at: SPECIAL PAPER http://www.geofisica.unam.mx/LatinmagLetters/ Papers contents can be reproduced meanwhile the source is cited Latinmag Letters Volume 1, Special Issue (2011), LL11-02SP SPECIAL PAPER Published on behalf of Latin American Association of Paleomagnetism and Geomagnetism by the Instituto de Geofisica, Universidad Nacional Autónoma de México Volume 1, Special Issue This special issue of LATINMAG LETTERS contents the contributions presented at the 2011 Biennial Meeting of LATINMAG (Latin-American Association of Paleomagnetism and Geomagnetism), held at the Universidad Nacional del Centro de la Provincia de Buenos Aires (National University of the Center of Buenos Aires Province), Tandil, Argentina, performed from 23 to 26 November of 2011. Preface Sessions contributions A. GEOMAGNETISM & GEOPHYSICAL MÉTHODS B. PALEOMAGNETISM & TECTONICS C. ARCHEOMAGNETISM, PALEOINTENSITY & PALEOSECULAR VARIATIONS D. ROCK MAGNETISM & ENVIRONMENTAL MAGNETISM E. SHORT COURSES Editors Committee: Ana Maria Sinito: Associated Editor in charge Cecilia I. Caballero Miranda: Technical Editor Ana Maria Soler Arrechadle, Leda Sánchez Bettucci & Milagrosa Aldana: Editorial Board (reviewers and technical edition assistance) 1 Proceedings of 2nd Biennieal Meeting / Latinmag Letters 1, Special Issue (2011), LL11-02SP Preface This special issue of Latinmag Letters contents the contributions presented at the Second Biennial Meeting of the Latin-American Association of Paleomagnetism and Geomagnetism (LATINMAG).
    [Show full text]
  • Crustal Motion in the Southern Andes (26°–36°S): Do the Andes Behave Like a Microplate?
    Article Geochemistry 3 Volume 4, Number 10 Geophysics 8 October 2003 1085, doi:10.1029/2003GC000505 GeosystemsG G ISSN: 1525-2027 AN ELECTRONIC JOURNAL OF THE EARTH SCIENCES Published by AGU and the Geochemical Society Crustal motion in the Southern Andes (26°–36°S): Do the Andes behave like a microplate? Benjamin A. Brooks and Michael Bevis School of Ocean and Earth Science and Technology, University of Hawaii, 1680 East-West Road, Honolulu, Hawaii 96822, USA ([email protected]; [email protected]) Robert Smalley Jr. Center for Earthquake Research and Information, University of Memphis, 3876 Central Ave Ste 1, Memphis, Tennessee 38152, USA ([email protected]) Eric Kendrick School of Ocean and Earth Science and Technology, University of Hawaii, 1680 East-West Road, Honolulu, Hawaii 96822, USA ([email protected]) Rene´ Manceda RepsolYPF, 1330 Lake Robbins Drive, The Woodlands, Texas 77380, USA ([email protected]) Eduardo Laurı´a Instituto Geogra´fico Militar Argentina, Cabildo 381, Buenos Aires, Argentina ([email protected]) Rodrigo Maturana Instituto Geogra´fico Militar Chile, Dieciocho N ° 369, Santiago, Chile ([email protected]) Mario Araujo Instituto Nacional de Prevencio´n Sı´smica, Roger Balet Norte 47, 5400, San Juan, Argentina ([email protected]) [1] A new Global Positioning System (GPS)-derived velocity field for the Andes mountains (26°–36°S) allows analysis of instantaneous partitioning between elastic and anelastic deformation at the orogen’s opposing sides. Adding an ‘‘Andes’’ microplate to the traditional description of Nazca-South America plate convergence provides the kinematic framework for nearly complete explanation of the observed velocity field.
    [Show full text]
  • Case of the Andean Foreland of Western Argentina (28°S-33°S) Lionel Siame, O
    Deformation partitioning in flat subduction setting : Case of the Andean foreland of western Argentina (28°S-33°S) Lionel Siame, O. Bellier, Michel Sébrier, M. Araujo To cite this version: Lionel Siame, O. Bellier, Michel Sébrier, M. Araujo. Deformation partitioning in flat subduction set- ting : Case of the Andean foreland of western Argentina (28°S-33°S). Tectonics, American Geophysical Union (AGU), 2005, 24, pp.1-24. 10.1029/2005TC001787. hal-00022417 HAL Id: hal-00022417 https://hal.archives-ouvertes.fr/hal-00022417 Submitted on 19 Feb 2021 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. TECTONICS, VOL. 24, TC5003, doi:10.1029/2005TC001787, 2005 Deformation partitioning in flat subduction setting: Case of the Andean foreland of western Argentina (28°S––33°S) L. L. Siame and O. Bellier Centre Europe´en de Recherche et d’Enseignement de Ge´osciences de l’Environnement, UMR 6635, Universite´ Paul Ce´zanne, Aix-en-Provence, France M. Se´brier Laboratoire de Tectonique, UMR 7072, Universite´ Pierre et Marie Curie, Paris, France M. Araujo Instituto Nacional de Prevencio´n Sı´smica, San Juan, Argentina Received 10 January 2005; revised 12 May 2005; accepted 17 June 2005; published 13 September 2005.
    [Show full text]
  • Estudios Geofísicos Aplicados a La Neotectónica De La Falla El Tigre, Precordillera De San Juan
    Tesis Doctoral Estudios geofísicos aplicados a la neotectónica de la falla El Tigre, precordillera de San Juan Fazzito, Sabrina Yesica 2011 Este documento forma parte de la colección de tesis doctorales y de maestría de la Biblioteca Central Dr. Luis Federico Leloir, disponible en digital.bl.fcen.uba.ar. Su utilización debe ser acompañada por la cita bibliográfica con reconocimiento de la fuente. This document is part of the doctoral theses collection of the Central Library Dr. Luis Federico Leloir, available in digital.bl.fcen.uba.ar. It should be used accompanied by the corresponding citation acknowledging the source. Cita tipo APA: Fazzito, Sabrina Yesica. (2011). Estudios geofísicos aplicados a la neotectónica de la falla El Tigre, precordillera de San Juan. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Cita tipo Chicago: Fazzito, Sabrina Yesica. "Estudios geofísicos aplicados a la neotectónica de la falla El Tigre, precordillera de San Juan". Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 2011. Dirección: Biblioteca Central Dr. Luis F. Leloir, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Contacto: [email protected] Intendente Güiraldes 2160 - C1428EGA - Tel. (++54 +11) 4789-9293 UNIVERSIDAD DE BUENOS AIRES Facultad de Ciencias Exactas y Naturales Departamento de Ciencias Geológicas ESTUDIOS GEOFÍSICOS APLICADOS A LA NEOTECTÓNICA DE LA FALLA EL TIGRE, PRECORDILLERA DE SAN JUAN Tesis presentada para optar al título de Doctor de la Universidad de Buenos Aires en el área Ciencias Geológicas Sabrina Yesica Fazzito Directores de Tesis: Dr. Augusto Ernesto Rapalini Dr. José María Cortés Consejero de Estudios: Dr.
    [Show full text]