Nature Around the ALMA Site – Part 1
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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. -
Atmospheric Conditions at a Site for Submillimeter Wavelength Astronomy
Atmospheric conditions at a site for submillimeter wavelength astronomy Simon J. E. Radford and M. A. Holdaway National Radio Astronomy Observatory, 949 North Cherry Avenue, Tucson, Arizona 85721, USA ABSTRACT At millimeter and submillimeter wavelengths, pressure broadened molecular sp ectral lines make the atmosphere a natural limitation to the sensitivity and resolution of astronomical observations. Trop ospheric water vap or is the principal culprit. The translucent atmosphere b oth decreases the signal, by attenuating incoming radiation, and increases the noise, by radiating thermally.Furthermore, inhomogeneities in the water vap or distribution cause variations in the electrical path length through the atmosphere. These variations result in phase errors that degrade the sensitivity and resolution of images made with b oth interferometers and lled ap erture telescop es. Toevaluate p ossible sites for the Millimeter Array, NRAO has carried out an extensive testing campaign. At a candidate site at 5000 m altitude near Cerro Cha jnantor in northern Chile, we deployed an autonomous suite of instruments in 1995 April. These include a 225 GHz tipping radiometer that measures atmospheric transparency and temp oral emission uctuations and a 12 GHz interferometer that measures atmospheric phase uctuations. A sub- millimeter tipping photometer to measure the atmospheric transparency at 350 mwavelength and a submillimeter Fourier transform sp ectrometer have recently b een added. Similar instruments have b een deployed at other sites, notably Mauna Kea, Hawaii, and the South Pole, by NRAO and other groups. These measurements indicate Cha jnantor is an excellent site for millimeter and submillimeter wavelength astron- omy. The 225 GHz transparency is b etter than on Mauna Kea. -
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. -
Energy, Water and Alternatives – Chilean Case Studies
A Global Context and Shared Implications • Change • Uncertainty • Ambiguity Social • Technical Challenge Technical • Expansion • Constraint • Knowledge • Rapid Pace Suzanne A. Pierce Research Assistant Professor Assistant Director Center for International Energy & Environmental Policy Digital Media Collaboratory Jackson School of Geosciences Center for Agile Technology The University of Texas at Austin The University of Texas at Austin ‘All the instances of scientific development and practice . are as much embedded in politics and cultures as they are creations of the researchers, practitioners, and industries.’ (Paraphrased from Heymann, 2010; Dulay, unpublished image) Common Pool Resources Come into Conflict Integrated Water Resources Management Collaborative processes meld the use of scientific information with citizen participation and technical decision support systems Finding rigorous and effective approaches to science- based resource management and dialogue. IWRM Case Study – Northern Chile Coyahuasi Copper Mine February 2012 Mining Water Energy Multi-Scale Complexity Global demand for Copper drives localized use of energy and water resources Energy and Water Primary Resource Candidates Geothermal: Estimated 3,300 and 16,000 MW potential estimated by the Energy Ministry. Key sites throughout country with highest potential sites currently at Puchuldiza, Tatio, and Tolhuaca. Playa lake: an arid zone feature that is transitional between a playa, which is completely dry most of the year, and a lake (Briere, 2000). In this study, a salar is an internally drained evaporative basin with surface water occurring mostly from spring discharge. Energy Context Installed Capacity: 15.420 MW NextGen: 33.024 MW Per Ministerio de Energía, Perez-Arce, May 2011 Renewables Recurso Eólico Recurso Solar Recurso Hidrológico Recurso Geotérmico (Concesiones) (En desarrollo) Per Ministerio de Energía, Perez-Arce, May 2011 Geothermal Energy Resource Development • Chile has about 3000 volcanoes along the Andes, and ~150 are active. -
Archaeological, Radiological, and Biological Evidence Offer Insight Into Inca Child Sacrifice
Archaeological, radiological, and biological evidence offer insight into Inca child sacrifice Andrew S. Wilsona,1, Emma L. Browna, Chiara Villab, Niels Lynnerupb, Andrew Healeyc, Maria Constanza Cerutid, Johan Reinharde, Carlos H. Previglianod,2, Facundo Arias Araozd, Josefina Gonzalez Diezd, and Timothy Taylora,3 aDepartment of Archaeological Sciences, and cCentre for Chemical and Structural Analysis, University of Bradford, Bradford BD7 1DP, United Kingdom; bLaboratory of Biological Anthropology, Department of Forensic Medicine, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark; dInstitute of High Mountain Research, Catholic University of Salta, Salta A4400FYP, Argentina; and eNational Geographic Society, Washington, DC 20036 Edited by Charles Stanish, University of California, Los Angeles, CA, and approved June 18, 2013 (received for review March 21, 2013) Examination of three frozen bodies, a 13-y-old girl and a girl and defining, element of a capacocha ritual. We also recognize that boy aged 4 to 5 y, separately entombed near the Andean summit the capacocha rite analyzed here was embedded within a multi- of Volcán Llullaillaco, Argentina, sheds new light on human sac- dimensional imperial ideology. rifice as a central part of the Imperial Inca capacocha rite, de- The frozen remains of the ∼13-y-old “Llullaillaco Maiden,” the scribed by chroniclers writing after the Spanish conquest. The 4- to 5-y-old “Llullaillaco Boy,” and the 4- to 5-y-old “Lightning high-resolution diachronic data presented here, obtained directly Girl” provide unusual and valuable analytical opportunities. Their from scalp hair, implies escalating coca and alcohol ingestion in the posture and placement within the shrine, surrounded by elite lead-up to death. -
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. -
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. -
Explora Atacama І Hikes
ATACAMA explorations explora Atacama І Hikes T2 Reserva Tatio T4 Cornisas Nights of acclimatization Nights of acclimatization needed: 2 needed: 0 Type: Half day Type: Half day Duration: 1h Duration: 2h 30 min Distance: 2,3 km / 1,4 mi Distance: 6,7 kms / 4,2 mi Max. Altitude: 4.321 m.a.s.l / Max. Altitude: 2.710 m.a.s.l / HIKES 14.176 f.a.s.l 8.891 f.a.s.l Description: This exploration Description: Departing by van, we offers a different way of visiting head toward the Catarpe Valley Our hikes have been designed according the Tatio geysers, a geothermal by an old road. From there, we to different interests and levels of skill. field with over 80 boiling water hike along the ledges of La Sal They vary in length and difficulty so we sources. In this trip there are Mountains, with panoramic views always recommend travelers to talk to their excellent opportunities of studying of the oasis, the Atacama salt flat, guides before choosing an exploration. the highlands fauna, which includes and The, La Sal, and Domeyko Every evening, guides brief travelers vicuñas, flamingos and foxes, Mountains, three mountain ranges on the different explorations, so that among others. We walk through the that shape the region’s geography. they can choose one that best fit their reserve with views of The Mountains By the end of the exploration we interests. Exploration times do not consider and steaming hot water sources. descend through Marte Valley’s sand transportation. Return to the hotel by van. -
Three-Dimensional Resistivity Image of the Magmatic System Beneath
PUBLICATIONS Geophysical Research Letters RESEARCH LETTER Three-dimensional resistivity image of the magmatic system 10.1002/2015GL064426 beneath Lastarria volcano and evidence for magmatic Key Points: intrusion in the back arc (northern Chile) • Electrical resistivity images of the Lastrarria volcano Daniel Díaz1,2, Wiebke Heise3, and Fernando Zamudio1 • The magmatic source is located to the south of Lastarria volcano 1Departamento de Geofísica, Universidad de Chile, Santiago, Chile, 2Centro de Excelencia en Geotermia de Los Andes, • Deep conductor in the back arc 3 suggests magmatic intrusion Santiago, Chile, GNS Science, Lower Hutt, New Zealand Supporting Information: Abstract Lazufre volcanic center, located in the central Andes, is recently undergoing an episode of uplift, • Readme conforming one of the most extensive deforming volcanic systems worldwide, but its magmatic system and • Text S1 • Figure S1 its connection with the observed uplift are still poorly studied. Here we image the electrical resistivity structure • Figure S2 using the magnetotelluric method in the surroundings of the Lastarria volcano, one of the most important • Figure S3 features in the Lazufre area, to understand the nature of the magmatic plumbing, the associated fumarolic • Figure S4 activity, and the large-scale surface deformation. Results from 3-D modeling show a conductive zone at 6 km Correspondence to: depth south of the Lastarria volcano interpreted as the magmatic heat source which is connected to a shallower D. Díaz, conductor beneath the volcano, showing the pathways of volcanic gasses and heated fluid. A large-scale [email protected] conductive area coinciding with the area of uplift points at a magma intrusion at midcrustal depth.