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Mitigation of Environmental Extremes As a Possible Indicator of Extended Habitat Sustainability for Lakes on Early Mars
Invited Paper Mitigation of Environmental Extremes as a Possible Indicator of Extended Habitat Sustainability for Lakes on Early Mars Nathalie A. Cabrol*a, Edmond A. Grina, Andrew N. Hockb aNASA Ames Research Center/SETI Carl Sagan Center, Space Science Division, MS 245-3. Moffett Field, CA 94035- 1000, USA; bUCLA. Dpt. of Earth & Space Sciences. 595 Charles Young Drive East, Los Angeles, CA 90095-1567. ABSTRACT The impact of individual extremes on life, such as UV radiation (UVR), temperatures, and salinity is well documented. However, their combined effect in nature is not well-understood while it is a fundamental issue controlling the evolution of habitat sustainability within individual bodies of water. Environmental variables combine in the Bolivian Altiplano to produce some of the highest, least explored and most poorly understood lakes on Earth. Their physical environment of thin atmosphere, high ultraviolet radiation, high daily temperature amplitude, ice, sulfur-rich volcanism, and hydrothermal springs, combined with the changing climate in the Andes and the rapid loss of aqueous habitat provide parallels to ancient Martian lakes at the Noachian/Hesperian transition 3.7-3.5 Ga ago. Documenting this analogy is one of the focuses of the High-Lakes Project (HLP). The geophysical data we collected on three of them located up to 5,916 m elevation suggests that a combination of extreme factors does not necessarily translate into a harsher environment for life. Large and diverse ecosystems adapt to UVR reaching 200%-216% that of sea level in bodies of water sometimes no deeper than 50 cm, massive seasonal freeze-over, and unpredictable daily evolution of UVR and temperature. -
And Gas-Based Geochemical Prospecting Of
Water- and gas-based geochemical prospecting of geothermal reservoirs in the Tarapacà and Antofagasta regions of northern Chile Tassi, F.1, Aguilera, F.2, Vaselli, O.1,3, Medina, E.2, Tedesco, D.4,5, Delgado Huertas, A.6, Poreda, R.7 1) Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121, Florence, Italy 2) Departamento de Ciencias Geológicas, Universidad Católica del Norte, Av. Angamos 0610, 1280, Antofagasta, Chile 3) CNR-IGG Institute of Geosciences and Earth Resources, Via G. La Pira 4, 50121, Florence, Italy 4)Department of Environmental Sciences, 2nd University of Naples, Via Vivaldi 43, 81100 Caserta, Italy 5) CNR-IGAG National Research Council, Institute of Environmental Geology and Geo-Engineering, Pzz.e A. Moro, 00100 Roma, Italy. 6) CSIS Estacion Experimental de Zaidin, Prof. Albareda 1, 18008, Granada, Spain. 7) Department of Earth and Environmental Sciences, 227 Hutchinson Hall, Rochester, NY 14627, U.S.A.. Studied area The Andean Central Volcanic Zone, which runs parallel the Central Andean Cordillera crossing from North to This study is mainly focused on the geochemical characteristics of water and gas South the Tarapacà and Antofagasta regions of northern Chile, consists of several volcanoes that have shown phases of thermal fluids discharging in several geothermal areas of northern Chile historical and present activity (e.g. Tacora, Guallatiri, Isluga, Ollague, Putana, Lascar, Lastarria). Such an intense (Fig. 1); volcanism is produced by the subduction process thrusting the oceanic Nazca Plate beneath the South America Plate. The anomalous geothermal gradient related to the geodynamic assessment of this extended area gives El Tatio, Apacheta, Surire, Puchuldiza-Tuya also rise to intense geothermal activity not necessarily associated with the volcanic structures. -
Jürgen Reinmüller
JÜRGEN REINMÜLLER KLIMAVERHÄLTNISSE IN EXTREMEN HOCHGEBIRGEN DER ERDE Ergebnisse eines Sonderklimamessnetzes Diplomarbeit zur Erlangung des akademischen Grades „Magister der Naturwissenschaften“ an der Naturwissenschaftlichen Fakultät der Karl-Franzens-Universität Graz Betreuung durch: Ao. UNIV. PROF. DR. REINHOLD LAZAR Institut für Geographie und Raumforschung 2010 Eidesstattliche Erklärung 2 Eidesstattliche Erklärung Ich, Jürgen Reinmüller, erkläre hiermit, dass die vorliegende Diplomarbeit von mir selbst und ohne unerlaubte Beihilfe verfasst wurde. Die von mir benutzten Hilfsmittel sind im Literaturverzeichnis am Ende dieser Arbeit aufgelistet und wörtlich oder inhaltlich entnommene Stellen wurden als solche kenntlich gemacht. Admont, im März 2010 Jürgen Reinmüller Vorwort 3 Vorwort Die höchstgelegenen Bereiche der Hochgebirge der Erde weisen bis dato eine außerordentlich geringe Dichte an Klimastationen und damit ein Defizit an verfügbaren Klimadaten auf. Aussagen zu den thermischen Aspekten in den Gipfellagen extremer Hochgebirge jenseits der 6000 m Grenze konnten bis dato nur unbefriedigend erörtert werden. Als staatlich geprüfter Berg- und Schiführer und begeisterter Höhenbergsteiger liegen die beeindruckenden, hochgelegenen Gipfel seit Jahren in meinem Interessensbereich. Zudem sehe ich mich in meinem bergführerischen Arbeitsbereich zunehmend mit den Zeichen des aktuellen Klimawandels konfrontiert. Schmelzende Gletscher oder auftauender Permafrost stellen für Bergsteiger ein nicht unwesentliches Gefahrenpotential dar. Die durch das von Univ. Prof. Dr. Reinhold Lazar ins Leben gerufene Projekt HAMS.net (High Altitude Meteorological Station Network) gewonnenen Daten können künftig bei der Tourenplanung diverser Expeditionen miteinbezogen werden und stellen eine wichtige Grundlage für klimatologische Hochgebirgsforschung in großen Höhen dar. Ich selbst durfte dieses interessante Projekt durch den Data-Logger-Tausch am Aconcagua im Februar 2007 ein wenig unterstützen und werde dem Projekt auch in Zukunft mit Rat und Tat zur Seite stehen. -
Field Excursion Report 2010
Presented at “Short Course on Geothermal Drilling, Resource Development and Power Plants”, organized by UNU-GTP and LaGeo, in Santa Tecla, El Salvador, January 16-22, 2011. GEOTHERMAL TRAINING PROGRAMME LaGeo S.A. de C.V. GEOTHERMAL ACTIVITY AND DEVELOPMENT IN SOUTH AMERICA: SHORT OVERVIEW OF THE STATUS IN BOLIVIA, CHILE, ECUADOR AND PERU Ingimar G. Haraldsson United Nations University Geothermal Training Programme Orkustofnun, Grensasvegi 9, 108 Reykjavik ICELAND [email protected] ABSTRACT South America holds vast stores of geothermal energy that are largely unexploited. These resources are largely the product of the convergence of the South American tectonic plate and the Nazca plate that has given rise to the Andes mountain chain, with its countless volcanoes. High-temperature geothermal resources in Bolivia, Chile, Ecuador and Peru are mainly associated with the volcanically active regions, although low temperature resources are also found outside them. All of these countries have a history of geothermal exploration, which has been reinvigorated with recent changes in global energy prices and the increased emphasis on renewables to combat global warming. The paper gives an overview of their main regions of geothermal activity and the latest developments in the geothermal sector are reviewed. 1. INTRODUCTION South America has abundant geothermal energy resources. In 1999, the Geothermal Energy Association estimated the continent’s potential for electricity generation from geothermal resources to be in the range of 3,970-8,610 MW, based on available information and assuming the use of technology available at that time (Gawell et al., 1999). Subsequent studies have put the potential much higher, as a preliminary analysis of Chile alone assumes a generation potential of 16,000 MW for at least 50 years from geothermal fluids with temperatures exceeding 150°C, extracted from within a depth of 3,000 m (Lahsen et al., 2010). -
Appendix A. Supplementary Material to the Manuscript
Appendix A. Supplementary material to the manuscript: The role of crustal and eruptive processes versus source variations in controlling the oxidation state of iron in Central Andean magmas 1. Continental crust beneath the CVZ Country Rock The basement beneath the sampled portion of the CVZ belongs to the Paleozoic Arequipa- Antofalla terrain – a high temperature metamorphic terrain with abundant granitoid intrusions that formed in response to Paleozoic subduction (Lucassen et al., 2000; Ramos et al., 1986). In Northern Chile and Northwestern Argentina this Paleozoic metamorphic-magmatic basement is largely homogeneous and felsic in composition, consistent with the thick, weak, and felsic properties of the crust beneath the CVZ (Beck et al., 1996; Fig. A.1). Neodymium model ages of exposed Paleozoic metamorphic-magmatic basement and sediments suggest a uniform Proterozoic protolith, itself derived from intrusions and sedimentary rock (Lucassen et al., 2001). AFC Model Parameters Pervasive assimilation of continental crust in the Central Andean ignimbrite magmas is well established (Hildreth and Moorbath, 1988; Klerkx et al., 1977; Fig. A.1) and has been verified by detailed analysis of radiogenic isotopes (e.g. 87Sr/86Sr and 143Nd/144Nd) on specific systems within the CVZ (Kay et al., 2011; Lindsay et al., 2001; Schmitt et al., 2001; Soler et al., 2007). Isotopic results indicate that the CVZ magmas are the result of mixing between a crustal endmember, mainly gneisses and plutonics that have a characteristic crustal signature of high 87Sr/86Sr and low 145Nd/144Nd, and the asthenospheric mantle (low 87Sr/86Sr and high 145Nd/144Nd; Fig. 2). In Figure 2, we model the amount of crustal assimilation required to produce the CVZ magmas that are targeted in this study. -
Full-Text PDF (Final Published Version)
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. -
Preliminary Ranking of Geothermal Potential in the Cascade and Aleutian Volcanic Arcs, Part I: Data Collection
GRC Transactions, Vol. 39, 2015 Preliminary Ranking of Geothermal Potential in the Cascade and Aleutian Volcanic Arcs, Part I: Data Collection Lisa Shevenell1, Mark Coolbaugh1,2, Nicholas H. Hinz2, Pete Stelling3, Glenn Melosh4, William Cumming5, and Corné Kreemer2 1ATLAS Geoscience, Inc., Reno NV, USA 2Nevada Bureau of Mines and Geology, UNR, Reno NV, USA 3Western Washington University, Bellingham WA, USA 4GEODE, Santa Rosa CA, USA • 5Cumming Geoscience, Santa Rosa CA, USA [email protected] • [email protected] • [email protected] • [email protected] [email protected] • [email protected] • [email protected] Keywords Cascade, Aleutian, volcanic, geothermal, potential, structure, database ABSTRACT As part of a DOE funded project on Geothermal Play Fairway Analysis, a geothermal assessment of volcanic centers in the Cascade and Aleutian volcanic arcs is being conducted that includes a large data gathering effort dis- cussed in this paper, and a statistical modeling effort to qualitatively rank the geothermal potential of individual VCs in these two US arcs, discussed in a second companion paper. The data compiled from the Cascades and Aleutians are compared to geologic, geochemical and geophysical information from productive volcanic arc centers in the other parts of the world. Seven other volcanic arc segments from around the globe are used in this comparative study. Preliminary findings from data evaluation indicate that there are systematic changes in structural setting, from an extensional influ- ence south of Mt. Hood (in part due to encroachment of the back arc in the southern half) to more compressional north of Mt. Hood. Comparison with productive geothermal fields around the world shows that large fumarolic areas are associated with most >240°C power-producing geothermal systems outside the US arcs (e.g., Kamojang, Indonesia, among others), whereas there is a general absence of large fumarolic areas in the Cascades and Aleutian arcs, aside from of the Lassen volcano area. -
Compositional Zoning of the Bishop Tuff
JOURNAL OF PETROLOGY VOLUME 48 NUMBER 5 PAGES 951^999 2007 doi:10.1093/petrology/egm007 Compositional Zoning of the Bishop Tuff WES HILDRETH1* AND COLIN J. N. WILSON2 1US GEOLOGICAL SURVEY, MS-910, MENLO PARK, CA 94025, USA 2SCHOOL OF GEOGRAPHY, GEOLOGY AND ENVIRONMENTAL SCIENCE, UNIVERSITY OF AUCKLAND, PB 92019 AUCKLAND MAIL CENTRE, AUCKLAND 1142, NEW ZEALAND Downloaded from https://academic.oup.com/petrology/article/48/5/951/1472295 by guest on 29 September 2021 RECEIVED JANUARY 7, 2006; ACCEPTED FEBRUARY 13, 2007 ADVANCE ACCESS PUBLICATION MARCH 29, 2007 Compositional data for 4400 pumice clasts, organized according to and the roofward decline in liquidus temperature of the zoned melt, eruptive sequence, crystal content, and texture, provide new perspec- prevented significant crystallization against the roof, consistent with tives on eruption and pre-eruptive evolution of the4600 km3 of zoned dominance of crystal-poor magma early in the eruption and lack of rhyolitic magma ejected as the BishopTuff during formation of Long any roof-rind fragments among the Bishop ejecta, before or after onset Valley caldera. Proportions and compositions of different pumice of caldera collapse. A model of secular incremental zoning is types are given for each ignimbrite package and for the intercalated advanced wherein numerous batches of crystal-poor melt were plinian pumice-fall layers that erupted synchronously. Although released from a mush zone (many kilometers thick) that floored the withdrawal of the zoned magma was less systematic than previously accumulating rhyolitic melt-rich body. Each batch rose to its own realized, the overall sequence displays trends toward greater propor- appropriate level in the melt-buoyancy gradient, which was self- tions of less evolved pumice, more crystals (0Á5^24 wt %), and sustaining against wholesale convective re-homogenization, while higher FeTi-oxide temperatures (714^8188C). -
Volcán Lascar
Volcán Lascar Región: Antofagasta Provincia: El Loa Comuna: San Pedro de Atacama Coordenadas: 21°22’S – 67°44’O Poblados más cercanos: Talabre – Camar – Socaire Tipo: Estratovolcán Altura: 5.592 m s.n.m. Diámetro basal: 8.9 km Área basal: 62.2 km2 Volumen estimado: 28.5 km3 Última actividad: 2015 Última erupción mayor: 1993 Volcán Lascar. Vista desde el norte Ranking de riesgo (Fotografía: Gabriela Jara, SERNAGEOMIN) 14 específico: Generalidades El volcán Láscar corresponde a un estratovolcán compuesto, elongado en dirección este-oeste, activo desde hace unos 240 ka y emplazado en el margen oeste de la planicie altiplánica. Está conformado por lavas andesíticas, que alcanzan más de 10 km de longitud, y por potentes lavas dacíticas que se extienden hasta 5 km, las que fueron emitidas desde los flancos NO a SO. La lava más reciente se estima en 7 mil años de antigüedad. En los alrededores del volcán se reconocen depósitos de flujo y caída piroclástica, además de numerosos cráteres de impacto asociados a la eyección de bombas durante erupciones plinianas y subplinianas. El principal evento eruptivo durante su evolución se denomina Ignimbrita Soncor, generado hace unos 27 ka al oeste del volcán y con un volumen estimado cercano a los 10 km3. En la cima de este volcán se observan seis cráteres, algunos anidados, y el central de estos se encuentra activo. Registro eruptivo Este volcán ha presentado alrededor de 30 erupciones explosivas desde el siglo XIX, lo que lo convierte en el volcán más activo del norte de Chile. Estos eventos han consistido típicamente en erupciones vulcanianas de corta duración, con emisión de ceniza fina y proyecciones balísticas en un radio de 5 km, donde el último evento de este tipo ocurrió el 30 de octubre del 2015. -
GY 111: Physical Geology
UNIVERSITY OF SOUTH ALABAMA GY 111: Physical Geology Lecture 9: Extrusive Igneous Rocks Instructor: Dr. Douglas W. Haywick Last Time 1) The chemical composition of the crust 2) Crystallization of molten rock 3) Bowen's Reaction Series Web notes 8 Chemical Composition of the Crust Element Wt% % of atoms Oxygen 46.6 60.5 Silicon 27.7 20.5 Aluminum 8.1 6.2 Iron 5.0 1.9 Calcium 3.6 1.9 Sodium 2.8 2.5 Potassium 2.6 1.8 Magnesium 2.1 1.4 All other elements 1.5 3.3 Crystallization of Magma http://myweb.cwpost.liu.edu/vdivener/notes/igneous.htm Bowen’s Reaction Series Source http://www.ltcconline.net/julian Igneous Rock Composition Source: http://hyperphysics.phy-astr.gsu.edu Composition Formation Dominant Silica content Temperature Minerals Ultramafic Very high Olivine, pyroxene Very low (<45%) Mafic High Olivine, pyroxene, low Ca-plagioclase Intermediate Medium Na-Plagioclase, moderate amphibole, biotite Felsic Medium-low Orthoclase, quartz, high (>65%) muscovite, biotite Igneous Rock Texture Extrusive Rocks (Rapid Cooling; non visible* crystals) Intrusive Rocks (slow cooling; 100 % visible crystals) *with a hand lens Igneous Rock Texture Igneous Rock Texture Today’s Agenda 1) Pyro-what? (air fall volcanic rocks) 2) Felsic and Intermediate Extrusive Rocks 3) Mafic Extrusive Rocks Web notes 9 Pyroclastic Igneous Rocks Pyroclastic Igneous Rocks Pyroclastic: Pyro means “fire”. Clastic means particles; both are of Greek origin. Pyroclastic Igneous Rocks Pyroclastic: Pyro means “fire”. Clastic means particles; both are of Greek origin. Pyroclastic rocks are usually erupted from composite volcanoes (e.g., they are produced via explosive eruptions from viscous, “cool” lavas) Pyroclastic Igneous Rocks Pyroclastic: Pyro means “fire”. -
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. -
Signature Andes: Highlands of Peru, Bolivia and Chile
16 days 11:13 01-09-2021 We are the UK’s No.1 specialist in travel to Latin As our name suggests, we are single-minded America and have been creating award-winning about Latin America. This is what sets us apart holidays to every corner of the region for over four from other travel companies – and what allows us decades; we pride ourselves on being the most to offer you not just a holiday but the opportunity to knowledgeable people there are when it comes to experience something extraordinary on inspiring travel to Central and South America and journeys throughout Mexico, Central and South passionate about it too. America. A passion for the region runs Fully bonded and licensed Our insider knowledge helps through all we do you go beyond the guidebooks ATOL-protected All our Consultants have lived or We hand-pick hotels with travelled extensively in Latin On your side when it matters character and the most America rewarding excursions Book with confidence, knowing Up-to-the-minute knowledge every penny is secure Let us show you the Latin underpinned by 40 years' America we know and love experience 11:13 01-09-2021 11:13 01-09-2021 This thrilling private journey captures the natural and cultural highlights of the southern Andes of Peru, the altiplano of Bolivia and the salt flats straddling the border with Chile. Arrive in the vast metropolis of the Peruvian capital, Lima, and move on to historic Cusco, the former Inca capital and a treasure trove of Inca stonework and colonial architecture.