Excursions All of Our Tours Have Been Designed to Allow a Genuine Connection with the Desert Highland Plains
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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. -
Lithium Extraction in Argentina: a Case Study on the Social and Environmental Impacts
Lithium extraction in Argentina: a case study on the social and environmental impacts Pía Marchegiani, Jasmin Höglund Hellgren and Leandro Gómez. Executive summary The global demand for lithium has grown significantly over recent years and is expected to grow further due to its use in batteries for different products. Lithium is used in smaller electronic devices such as mobile phones and laptops but also for larger batteries found in electric vehicles and mobility vehicles. This growing demand has generated a series of policy responses in different countries in the southern cone triangle (Argentina, Bolivia and Chile), which together hold around 80 per cent of the world’s lithium salt brine reserves in their salt flats in the Puna area. Although Argentina has been extracting lithium since 1997, for a long time there was only one lithium-producing project in the country. In recent years, Argentina has experienced increased interest in lithium mining activities. In 2016, it was the most dynamic lithium producing country in the world, increasing production from 11 per cent to 16 per cent of the global market (Telam, 2017). There are now around 46 different projects of lithium extraction at different stages. However, little consideration has been given to the local impacts of lithium extraction considering human rights and the social and environmental sustainability of the projects. With this in mind, the current study seeks to contribute to an increased understanding of the potential and actual impacts of lithium extraction on local communities, providing insights from local perspectives to be considered in the wider discussion of sustainability, green technology and climate change. -
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. -
Unraveling the Peruvian Phase of the Central Andes: Stratigraphy, Sedimentology and Geochronology of the Salar De Atacama Basin (22°30-23°S), Northern Chile
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/271538622 Unraveling the Peruvian Phase of the Central Andes: Stratigraphy, sedimentology and geochronology of the Salar de Atacama Basin (22°30-23°S), northern Chile Article in Basin Research · March 2015 DOI: 10.1111/bre.12114 CITATIONS READS 5 127 4 authors: Sebastián Bascuñán Cesar Arriagada University of Chile University of Chile 4 PUBLICATIONS 5 CITATIONS 90 PUBLICATIONS 664 CITATIONS SEE PROFILE SEE PROFILE Jacobus Philippus Le Roux Katja Deckart University of Chile University of Chile 141 PUBLICATIONS 1,668 CITATIONS 28 PUBLICATIONS 610 CITATIONS SEE PROFILE SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Jacobus Philippus Le Roux letting you access and read them immediately. Retrieved on: 09 August 2016 EAGE Basin Research (2015) 1–28, doi: 10.1111/bre.12114 Unraveling the Peruvian Phase of the Central Andes: stratigraphy, sedimentology and geochronology of the Salar de Atacama Basin (22°30–23°S), northern Chile Sebastia´ n Bascun˜ a´ n,* Ce´ sar Arriagada,* Jacobus Le Roux*,† and Katja Deckart* *Departamento de Geologıa, Universidad de Chile, Santiago, Chile †Centro de Excelencia en Geotermia de los Andes (CEGA), Universidad de Chile, Santiago, Chile ABSTRACT The Salar de Atacama Basin holds important information regarding the tectonic activity, sedimen- tary environments and their variations in northern Chile during Cretaceous times. About 4000 m of high-resolution stratigraphic columns of the Tonel, Purilactis and Barros Arana Formations reveal braided fluvial and alluvial facies, typical of arid to semi-arid environments, interrupted by scarce intervals with evaporitic, aeolian and lacustrine sedimentation, displaying an overall coarsening- upward trend. -
Late Mesozoic to Paleogene Stratigraphy of the Salar De Atacama Basin, Antofagasta, Northern Chile: Implications for the Tectonic Evolution of the Central Andes
Late Mesozoic to Paleogene stratigraphy of the Salar de Atacama Basin, Antofagasta, Northern Chile: Implications for the tectonic evolution of the Central Andes Constantino Mpodozisa,T,Ce´sar Arriagadab, Matilde Bassoc, Pierrick Roperchd, Peter Cobbolde, Martin Reichf aServicio Nacional de Geologı´a y Minerı´a, now at Sipetrol. SA, Santiago, Chile bDepartamento de Geologı´a, Universidad de Chile, Santiago, Chile cServicio Nacional de Geologı´a y Minerı´a, Santiago, Chile dIRD/Dep. de Geologı´a, Universidad de Chile, Santiago, Chile eGe´osciences-Rennes (UMR6118 du CNRS), France fDepartment of Geological Sciences University of Michigan, United States Abstract The Salar de Atacama basin, the largest bpre-AndeanQ basin in Northern Chile, was formed in the early Late Cretaceous as a consequence of the tectonic closure and inversion of the Jurassic–Early Cretaceous Tarapaca´ back arc basin. Inversion led to uplift of the Cordillera de Domeyko (CD), a thick-skinned basement range bounded by a system of reverse faults and blind thrusts with alternating vergence along strike. The almost 6000-m-thick, upper Cretaceous to lower Paleocene sequences (Purilactis Group) infilling the Salar de Atacama basin reflects rapid local subsidence to the east of the CD. Its oldest outcropping unit (Tonel Formation) comprises more than 1000 m of continental red sandstones and evaporites, which began to accumulate as syntectonic growth strata during the initial stages of CD uplift. Tonel strata are capped by almost 3000 m of sandstones and conglomerates of western provenance, representing the sedimentary response to renewed pulses of tectonic shortening, which were deposited in alluvial fan, fluvial and eolian settings together with minor lacustrine mudstone (Purilactis Formation). -
Vegetation and Climate Change on the Bolivian Altiplano Between 108,000 and 18,000 Years Ago
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by DigitalCommons@University of Nebraska University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Earth and Atmospheric Sciences, Department Papers in the Earth and Atmospheric Sciences of 1-1-2005 Vegetation and climate change on the Bolivian Altiplano between 108,000 and 18,000 years ago Alex Chepstow-Lusty Florida Institute of Technology, [email protected] Mark B. Bush Florida Institute of Technology Michael R. Frogley Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL Paul A. Baker Duke University, [email protected] Sherilyn C. Fritz University of Nebraska-Lincoln, [email protected] See next page for additional authors Follow this and additional works at: https://digitalcommons.unl.edu/geosciencefacpub Part of the Earth Sciences Commons Chepstow-Lusty, Alex; Bush, Mark B.; Frogley, Michael R.; Baker, Paul A.; Fritz, Sherilyn C.; and Aronson, James, "Vegetation and climate change on the Bolivian Altiplano between 108,000 and 18,000 years ago" (2005). Papers in the Earth and Atmospheric Sciences. 30. https://digitalcommons.unl.edu/geosciencefacpub/30 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in the Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Alex Chepstow-Lusty, Mark B. Bush, Michael R. Frogley, Paul A. Baker, Sherilyn C. Fritz, and James Aronson This article is available at DigitalCommons@University of Nebraska - Lincoln: https://digitalcommons.unl.edu/ geosciencefacpub/30 Published in Quaternary Research 63:1 (January 2005), pp. -
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. -
Vestigios Arqueológicos Incaicos En Las Cumbres De La Zona Atacameña
Estudios Atacameños Nº 6, pp. 37-48 (1978) Vestigios arqueológicos incaicos en las cumbres de la zona atacameña Gustavo Le Paige1 Introducción acompañen fogones y rumas de leña la que a veces encontramos diseminada en diferentes sectores y a Desde hace un tiempo hemos tenido la intención diferentes alturas en nuestras ascensiones, lo cual de entregar a nuestros lectores algunas evidencias parece indicar que se trató de mantener una buena arqueológicas del Periodo Inca en la zona atacame- cantidad de madera para cualquier ocasión. ña. Cuestión que habíamos adelantado ya en algo en el número 5 de esta revista (Le Paige 1977). Sin En relación al material e información que tenemos, embargo, esa vez además de planos, croquis y fo- la cumbre del volcán Licancabur es la que más nos tografías presentamos el trabajo sobre una hipótesis ha aportado. Esta cumbre fue ascendida en 1886 por de distribución espacial y cómo ocuparon los incas una expedición francesa dando a conocer por primera estas cumbres. Sin duda se trata de funciones de vez las ruinas y leña que se encontraban en la cima. carácter sagrado y sirvieron además como medio de Cuestión que fue corroborada los años 1956 y 1972 comunicación y respeto religioso por parte de los por un equipo de militares y el autor, confirmando incas. Además, en nuestra zona este periodo recién además la pérdida de una estatuilla donada al Museo empieza a conocerse a la luz de nuevos trabajos de Historia Natural de Santiago por la expedición de sistemáticos como es el caso de la excavación del 1886, a la vez que logramos describir los conjuntos tambo de Catarpe por parte de un equipo chileno- ceremoniales (Figuras 1, 2, 3 y 4), cuestión que fue norteamericano. -
Hoyas Hidrográficas De Chile: Segunda Región
HOYAS HIDROGRÁFICAS DE CHILE: SEGUNDA REGIÓN REALIZADO POR: HANS NIEMEYER F. HOVA DEL RlO LOA La hoya hidrográfica del río Loa~ con una superf! cie tota~'de 33 570 km2 , se desarrolla en el tercio norte de la IIa R~ gión de Chile, entre latitudes extremas 20Q52' y 22Q57' L.S. ylongit~ des 68QOO' y 7oQ02' L.o. El río Loa nace en la falda norte del Vn. Mi ño~ en los Ojos del Hiño, casi en los límites entre la la y IIa Regio nes de Chile, en 21Q15' L.S. y 70Q L.O~ Su longitud total se acerca a 440 km. A pesar de su extensa hoya, los recursos h!dricos provienen de la cuenca alta que comprende alrededor del 20% de la su~ perficie total. Con curso aproximadamente norte-sur~ el Loa reco rre casi 150 km en un profundo cañón de altura variable, desde su nací miento hasta el oasis de Chiu ~hiu, pueblo que se levanta en su margen izquierda. En este trayecto recibe sus dos tributarios más importantes que le caen del este: el río San Pedro o Inacaliri y el río Salado. En Chiu Chiu dobla su curso sensiblemente hacia el oeste para alcanzar en un recorrido de 115 km el punto denominado Chacance. En él se le reúne por la derecha el río San Salvador. En Chacance,el Loa toma franca di= recci6n sur-norte hasta fertilizar el oasis de Quillagua, despu~s de una trayectoria de 80 km. A partir de Quillagua el Loa describe un gran arco y luego desemboca en el Pacífico~ en Caleta Huel~n, despu~8 de trasponer el macizo costero en un tajo profundo~ de más de 500 m de al tura. -
00-P. P.Ginas + Editorial
Estudios Atacameños Nº 16 - 1998 La tradición surandina del desierto: Etnobotánica del área del Salar de Atacama (Provincia de El Loa, Región de Antofagasta, Chile)1 CAROLINA VILLAGRÁN*, VICTORIA CASTRO**, GILBERTO SÁNCHEZ***, MARCELA ROMO**, CLAUDIO LATORRE** y LUIS FELIPE HINOJOSA** RESUMEN El área del Salar de Atacama, Provincia de El Loa, to de las plantas en los territorios de estas culturas segunda Región de Antofagasta del norte de Chi- y definir sus singularidades etnobotánicas, en co- le, es una de las más secas del mundo, correspon- rrespondencia con su situación tan especial den- diendo al área de máxima penetración del Desier- tro de los Andes del norte de Chile. Con este pro- to de Atacama en la costa Pacífica de Sudamérica. pósito, se realizó una recolección exhaustiva de la En efecto, y en concordancia con la disminución flora del área y un muestreo sistemático de la ve- de las lluvias en sentido NW-SE, desde los Andes getación, este último siguiendo un transecto de Arica (18°S), hacia los de Antofagasta (24°S), altitudinal desde el Salar de Atacama (2.700 m) se observa que la vegetación se retrae paulatina- hasta el Salar de Aguas Calientes (4.500 m). Pos- mente hacia mayores altitudes. Así, extensas áreas teriormente, se entrevistaron 38 personas prove- al interior de la ciudad de Calama, representadas nientes de San Pedro de Atacama, Toconao, por el Salar de Atacama, Cordillera de Domeyko Talabre, Camar, Socaire y Peine. y sectores bajos de la vertiente occidental andina corresponden a desiertos ‘absolutos’, con valores Para las 173 especies de plantas consultadas se de coberturas de plantas vasculares prácticamen- registraron 416 nombres vernaculares, correspon- te nulos. -
Situacion De La Biodiversidad En Chile, Desafios Para La Sustentabilidad
SITUACIÓN DE LA BIODIVERSIDAD EN CHILE DESAFÍOS PARA LA SUSTENTABILIDAD María Isabel Manzur FOUNDATION FOR DEPP ECOLOGY PROGRAMA CHILE SUSTENTABLE / SITUACIÓN DE LA BIODIVERSIDAD EN CHILE 1 SITUACIÓN DE LA BIODIVERSIDAD EN CHILE Desafíos para la Sustentabilidad © Programa Chile Sustentable ISBN: 956-7889-25-2 Registro Propiedad Intelectual: 144.149 Primera Edición Septiembre 2005 Se imprimieron 1000 ejemplares Elaboración: María Isabel Manzur Edición: M. Paz Aedo Sara Larraín Diseño de Portada y Diagramación: Mauricio Rocha Impresión: LOM Ediciones ESTA PUBLICACIÓN HA SIDO POSIBLE GRACIAS A LA COLABORACIÓN DE LA FUNDACIÓN FORD, LA FOUNDATION FOR DEEP ECOLOGY, Y LA FUNDACIÓN HEINRICH BÖLL. 2 PROGRAMA CHILE SUSTENTABLE / SITUACIÓN DE LA BIODIVERSIDAD EN CHILE INDICE PRESENTACIÓN ..................................................................................................................... 7 PRIMERA PARTE - BIODIVERSIDAD EN CHILE CAPÍTULO I. SITUACIÓN DE LA BIODIVERSIDAD EN CHILE .............................................. 15 1.1 ¿Qué es la Biodiversidad? ..................................................................................... 15 1.1.1 Diversidad de Especies .......................................................................................... 16 1.1.2 Diversidad de Ecosistemas ..................................................................................... 19 1.1.3 Diversidad Genética .............................................................................................. 22 1.2 Estado de Conservación -
Erosion, Transport and Segregation of Pumice and Lithic Clasts in Pyroclastic ¯Ows Inferred from Ignimbrite at Lascar Volcano, Chile
Journal of Volcanology and Geothermal Research 104 (2000) 201±235 www.elsevier.nl/locate/jvolgeores Erosion, transport and segregation of pumice and lithic clasts in pyroclastic ¯ows inferred from ignimbrite at Lascar Volcano, Chile E.S. Caldera,*, R.S.J. Sparksa, M.C. Gardewegb aDepartment of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK bServicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Casilla 10465, Santiago, Chile Received 4 November 1998; revised and accepted 4 May 2000 Abstract Investigations have been made on the distribution of pumice and lithic clasts in the lithic rich Soncor ignimbrite (26.5 ka) and the 1993 pumice ¯ow deposits of Lascar Volcano, Chile. The Soncor ignimbrite shows three main lithofacies which grade into one another. Coarse lithic breccias range from matrix poor strati®ed varieties, irregular shaped sheets and elongate hummocks in proximal environments, to breccia lenses with pumiceous ignimbrite matrix. Massive, lithic rich facies comprise the bulk of the ignimbrite. Pumice rich facies are bimodal with abundant large pumice clasts (often with reverse grading), rare lithic clasts and occur distally and on high ground adjacent to deep proximal valleys. In the 1993 pyroclastic ¯ow deposits lithic rich facies are deposited on slopes up to 148 whereas pumice rich facies are deposited only on slopes ,48. Lithic rich parts show a thin pumice rich corrugated surface which can be traced into the pumice rich facies. The high lithic content in the Soncor ignimbrite is attributed to the destruction of a pre-existing dome complex, deep explosive cratering into the interior of the volcano and erosion during pyroclastic ¯ow emplacement.