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8th ISAG

8th ISAG (18)

 

If you want to attend the meeting, please send an email to Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo..

Peter Molnar

Professor of geological sciences at University of Colorado, Boulder

His research focuses on how mountain ranges form and by studying the deformation of the continental lithosphere.

He was awarded by the prestigious Crafoord prize in 2014 "for his ground-breaking contribution to the understanding of global tectonics, in particular the deformation of continents and the structure and evolution of mountain ranges, as well as the impact of tectonic processes on ocean-atmosphere circulation and climate".

https://www.colorado.edu/geologicalsciences/peter-molnar

Suzanne M. Kay

Professor of geological sciences at Cornell University

Her research focuses on the applications of petrology and geochemistry to the origin and evolution of the continental crust, with particular emphasis on the relation of regional tectonics to magmatic processes at the Andean context.

She was recently awarded by distinguished career award from the Mineralogy, Geochemistry, Petrology, Volcanology division of the Geological Society of America.

https://www.eas.cornell.edu/faculty-directory/suzanne-mahlburg-kay

Víctor A. Ramos

Emeritus Professor at Universidad de Buenos Aires

His research focus on the tectonic evolution of South America. In 2017, he was awarded by the TWAS-Lenovo Science Prize “for his contributions to the understanding of the formation of the Andes and the crustal evolution of South America”.

http://www.idean.gl.fcen.uba.ar//wp-content/cvs/andina_cv_ramos_v.pdf

Eric Calais

Professor of Geosciences at Ecole Normale Superieure in Paris, member of the French National Academy of Sciences, and Senior Fellow of the Institut Universitaire de France.

His research interests concern the kinematics and dynamics of active tectonic processes, using as a main tool space geodesy, in particular the Global Positioning System (GPS), and the mechanical modelling of lithospheric deformation. He has also been involved in applied seismic hazard studies.

http://www.geologie.ens.fr/~ecalais/

Seventeen years (1999-2016) of eruptive activity at the Tungurahua andesitic volcano

Organizers:
Silvia Vallejo Vargas1, Benjamin Bernard1
Pablo Samaniego2, Silvana Hidalgo1, Patricia Mothes1, Jean-Luc Le Pennec2, Mario Ruiz1, Patricio Ramon1, Hugo Yepes1

1 IG-EPN, 2 IRD
September 28th to October 1st, 2019

Tungurahua volcano is one of the most active volcanoes of the Ecuadorian Andes. After ~75 years of quiescence, Tungurahua reactivated in October 1999 and remained active until March 2016. During this time, the volcano experienced low-to-moderate eruptive activity characterized by frequent explosions, local ash dispersal and frequent lahars. However, its pattern of activity changed in 2006, when one subplinian eruption occurred (August 16th) and produced large pyroclastic density currents and regional tephra dispersal. Since then, eruptive activity evolved to short-lived violent Strombolian to Vulcanian episodes followed by smaller explosions and frequent ash emissions (February 2008, May 2010, December 2012, July 2013, February and April 2014, February 2016).

The main goal of this workshop is to commemorate the 20th anniversary of the beginning of this eruption by bringing together volcanologists that have worked or still work on Tungurahua, and more broadly researchers interested in how andesitic volcanoes work.

We seek contributions from different approaches, such as physical volcanology, petrology, geophysics and those interested on the social issues associated with this long-lived eruption period.


UPDATE:
You can access the full programme from this location.

 

Date

Session

Saturday, September 28th, 2019 Afternoon

Session 1: Geological and petrological process
Conveners: Silvana Hidalgo and Pablo Samaniego

Sunday, September 29th, 2019 Morning

Session 2: Geophysical Monitoring and Early Warning at Tungurahua
Conveners: Patricia Mothes and Mario Ruiz

Sunday, September 29th, 2019 Afternoon

Session 3: Contributions and teachings of volcano-physics in the follow-up of a long-lasting volcanic eruption
Conveners: Jean-Luc Le Pennec and Benjamin Bernard

Monday, September 30th

Fieldtrip: Tungurahua monitoring system and volcanic deposits
Leaders: Jean-Luc Le Pennec, Patricio Ramón, Peter Hall, Patricia Mothes, Benjamin Bernard

Tuesday, October 1st, 2019 Morning

Session 4: Hazard and risk assessment
Conveners: Hugo Yepes and Patricio Ramón

For information about this event please contact:
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SESSIONS

Session 1: Geological and petrological process
Conveners: Silvana Hidalgo and Pablo Samaniego
(Saturday, September 28th, 2019. Afternoon)

Tungurahua volcano is an archetypical andesitic stratovolcano located in the Eastern Cordillera of the Ecuadorian arc. It is one of the most active Ecuadorian volcanoes with at least 4 eruptive episodes during historical times (i.e. since the beginning of the Spanish conquest). These eruptions include the 1641, 1773, 1889 and 1916-1918 events. In 1999, just before the Tungurahua reawakening, Hall et al. (1999) published their pioneering work on the eruptive chronology of Tungurahua volcano. Based on this work, Tungurahua was constructed by 3 successive edifices, the younger being the Tungurahua III that was formed during the last 3000 years, after a large sector collapse. During the last two decades, a series of in-depth studies was devoted to improve several aspects of the geological and petrological evolution of this volcano. Among the most important advances, we should mention: (1) a new geochronological dataset that allows to better constraint the main eruptive stages of this volcano and to estimate its eruptive and erosion rates; (2) the efforts to propose a new, high-frequency eruptive chronology for the last 3000 years BP; (3) the new geochemical and petrological data for the last 3 millennia, that allow us to identify the pre-eruptive magmatic process active at Tungurahua.


Session 2: Geophysical Monitoring and Early Warning at Tungurahua
Conveners: Patricia Mothes and Mario Ruiz
(Sunday, September 29th, 2019. Morning)

Tungurahua volcano in its nearly 20 years of on-off eruptive activity that began in 1999 produced a huge suite of seismic, infrasound, deformation, laharic and gas signals, and as well an important dataset of visual and infrared images. Since 2006, this volcano has a permanent and modern network of broad band seismic and infrasound stations. Real time data streams were used to forecast possible strengthening or decline of volcanic activity. Temporal deployments of geophysical instruments have also contributed to enhance our understanding of volcanic activity. Strong correlations also exist between patterns seen in the geophysical data and surface activity (ash falls and gravitational flows) of the volcano. In this session we invite those who have worked on Tungurahua geophysical data to present the results and perspectives of their investigations. We would also like to explore other avenues of investigation to be made with the existing data bank that could be exploited through collaborative research.


Session 3: Contributions and teachings of volcano-physics in the follow-up of a long-lasting volcanic eruption
Conveners: Jean-Luc Le Pennec and Benjamin Bernard
(Sunday, September 29th, 2019. Afternoon)

This session aims to present the main results from volcano-physical studies of the Tungurahua 1999-2016 eruption from the ground up. In order to define the volcanic activity, it is critical to obtain qualitative and quantitative data on the eruptive processes. These data are mostly obtained after detailed field work using up-dated acquisition and processing methods. Tungurahua 1999-2016 eruption exhibited almost every volcanic phenomenon including gas and pyroclastic plumes, pyroclastic fallouts and density currents, lava flows and lahars. The study of those phenomena and their deposits allowed to extract eruption source parameters and test numerical models. Based on the results obtained and their comparison with geophysical monitoring data we would like to open a discussion about the eruptive dynamics at Tungurahua that would be useful for long-term hazard assessment and short-term crisis management. This session is also the opportunity to focus on the debated characterization of Strombolian, violent Strombolian, Vulcanian and sub-Plinian eruptive styles at Tungurahua and other andesitic volcanoes worldwide.


Session 4: Hazard and risk assessment and early warning systems
Conveners: Hugo Yepes and Patricio Ramón
(Tuesday, October 1st, 2019. Morning)

Once the eruptive period in the Tungurahua began in 1999, hazard assessment was aided by a hazard map prepared in 1988 (Hall et al) which was used to discuss with the authorities and the community on the preparedness plans and mitigation activities. With the new information that was acquired afterwards by the IG researchers, this map was reissued in 2002. Later on, with the experience of what happened during the great eruptions in 2006, a new hazard map of Tungurahua was prepared in 2008, accounting for the effects of these eruptions and that map has been used for hazard mitigation up to the present. The first ash falls that occurred with the initial explosive activity of the volcano gave rise to the generation of the first lahars. The IG installed lahars detectors in the Juive and Vazcún ravines, where they most frequently occurred; this way, a first system of early warning for lahars was initiated, with the participation of authorities, vigías and the community. This was the base for the definitive implementation of the Early Warning System that worked successfully in the following years and until the end of the eruption. We will have different presentations that will discuss how the evaluation of the threat of the volcano was carried out and the experiences on the implementation and application of the Tungurahua Early Warning System.

 

FieldTrips

Leaders: JLL, PR, PH, PM, BB
(Monday, September 30th)

  • First stop, El Salado hotspring: spring water and lahar monitoring, lahar and PDC deposits, effects of the eruption (2005-2008 lahar, 2006 PDC), exposure to volcanic hazards (hotspring, hotels, technical school of Baños, main road)
  • Second stop, Los Pájaros: eruptive history (Cantera Las Juntas, lava flows), 2006 PDC deposits, effects of the eruption (Juive Grande)
  • Third stop, Achupashal ravine: past and present activity (lahars, dense and dilute PDCs)
  • Fourth stop, Palitahua: effects of the 2006 eruption (victims, houses and bridge), vigías of Tungurahua (Jorge Totoy), fallout monitoring system
  • Fifth stop, Penipe: Permanent shelters

Each main stop will be ~1h-1h30.

 

Workshop Fee: 320 USD

The fee includes:

  • transportation Quito-Baños-Quito
  • 3 nights at Sangay Hotel (Baños) in double rooms
  • 3 breakfasts and 3 lunchs at the hotel
  • 4 coffebreaks
  • boxlunch for the fieldtrip

 

El ISAG es un congreso que abarca todos los ámbitos de la geodinámica andina. Este congreso cuenta con la participación de investigadores, profesionales y estudiantes, con ponencias de alto nivel. Al ser un congreso internacional, los participantes vienen no sólo de América Latina, sino del mundo entero. Este congreso es una excelente oportunidad para presentar a su empresa. Nuestros Auspiciantes obtienen los beneficios para la presencia de su empresa, especialmente diseñados para esta edición.

Existen las siguientes categorías de auspicio:

ORO (US $5000)

  • PRESENCIA DE MARCA
    La empresa puede ubicar un banner de la empresa en la sala de conferencia.
  • PIEZAS GRÁFICAS
    Logotipo de su empresa en conjunto por categoría en: programa de mano, plano de sede, gigantografía, folletos, roll screen.
  • PRESENCIA EN SITIO WEB
    Logotipo haciendo link a la web de su empresa.
  • PRESENCIA EN REDES SOCIALES y BOLETINES ELECTRÓNICOS
    A través de Facebook y correo masivo.
  • OTROS BENEFICIOS
    Derecho a la instalación de un stand permanente en ubicación preferencial durante todo el congreso.
    Instalación de material promocional de su empresa en el Maletín del participante al congreso (1 unidad).
    10 inscripciones full pass al congreso.

PLATA (US $3000)

  • PRESENCIA DE MARCA
    La empresa puede ubicar un banner de la empresa en la sala de conferencia.
  • PIEZAS GRÁFICAS
    Logotipo de su empresa en conjunto por categoría en: programa de mano, plano de sede, gigantografía, folletos, roll screen.
  • PRESENCIA EN SITIO WEB
    Logotipo haciendo link a la web de su empresa.
  • PRESENCIA EN REDES SOCIALES y BOLETINES ELECTRÓNICOS
    A través de Facebook y correo masivo.
  • OTROS BENEFICIOS
    Derecho a la instalación de un stand permanente durante todo el congreso.
    Inclusión de material promocional de su empresa en el Maletín del participante al congreso (1 unidad).
    6 inscripciones full pass al congreso.

BRONCE (US $1000)

  • PIEZAS GRÁFICAS
    Logotipo de su empresa en conjunto por categoría en: programa de mano, plano de sede, gigantografía , folletos, roll screen.
  • PRESENCIA EN SITIO WEB
    Logotipo haciendo link a la web de su empresa.
  • PRESENCIA EN REDES SOCIALES y BOLETINES ELECTRÓNICOS
    A través de Facebook y correo masivo.
  • OTROS BENEFICIOS
    Derecho a la instalación de un stand permanente durante todo el congreso.
    Inclusión de material promocional de su empresa en el Maletín del participante al congreso (1 unidad).
    2 inscripciones full pass al congreso.

OTROS

  • COCKTAIL DE BIENVENIDA o COCKTAIL DE CLAUSURA (500 USD)
    La empresa puede ubicar su roll up en la sala del cocktail.
    La empresa puede distribuir material pubicitario al ingreso al evento.
    Logotipo de su empresa en boletín electrónico, programa de mano, gigantografía, roll screen y en el sitio web del evento, haciendo link a la web de su empresa.
    1 inscripción full pass al congreso.


Para obtenter mayor información, contactarse con la dirección Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo..

8isag auspicios

Silvana Hidalgo & Alexandra Alvarado
Instituto Geofísico, EPN, Quito, Ecuador

Ana Cabero
Departamento de Geología, EPN, Quito, Ecuador

Pablo Samaniego
Laboratoire Magmas et Volcans, UCA, CNRS, IRD, Clermont-Ferrand, France

Laurence Audin
IsTerre, UGA, CNRS, IRD, Grenoble, France

Sébastien Carretier
GET, Université de Toulouse, CNRS, IRD, CNES, Toulouse, France

Jean-Luc Le Pennec
Institut de Recherche pour le Développement, Quito, Ecuador

Philippe Charvis
Géoazur, Univ. Côte d’Azur, OCA, CNRS, IRD, Nice, France

 

Sergio Barrientos, Dep. Geofísica, Universidad de Chile, Santiago, Chile
Stéphanie Brichau, GET, Toulouse, France
Katja Deckart, Dep. Geología, Universidad de Chile, Santiago, Chile
Arturo Egüez, Dep. Geología, EPN, Quito, Ecuador
Andrés Folguera, Universidad de Buenos Aires, Argentina
Laura Giambiagi, Conicet, Mendoza, Argentina
Suzanne M. Kay, Cornell University, USA
Daniela Kröhling, Conicet, Santa Fe, Argentina
Laura Peruzza, OGS, Trieste, Italia
Carlos Martillo, Dep. Geología, ESPOL, Guayaquil, Ecuador
Anne Meltzer, Lehigh University, USA
Peter Molnar, University of Boulder, USA
Jean-Mathieu Nocquet, Geoazur, Université de Nice, France
Andreas Rietbrock, Karksruhe Institute of Technology, Germany
Rodrigo Riquelme, Dep. Geología, U. Católica del Norte, Antofagasta, Chile
Marco Rivera, INGEMMET, Arequipa, Perú
Vallentí Sallares, CSIC, Barcelona, España
Richard Spikings, Université de Genève, Switzerland
Hernando Tavera, IGP, Lima, Perú
Hugo Yepes, Instituto Geofísico, EPN, Quito, Ecuador

Registration for the ISAG Symposium will be in the lobby of the official Conference Hotel Mercure. Registration schedule will be the following:

  • Sept. 23rd: 13:00-18:00
  • Sept. 24th: 08:00-13:00

All participants must register and collect their ISAG ID to participate in the symposium.

Note that the late bird registration fee is 230 USD, excepting for students (100 USD). Registration fees include the conference registration and materials, the ice-breaker welcoming cocktail on September 23th, six coffee breaks, and the conference closing cocktail on September 26th. The ice-breaker welcoming cocktail will be take place at the conference Hotel at 18:00.

Registration fees do not include regular meals, lodging, or transportation.

You can access the Registration Form by clicking here.

 

Given that we are less than 1 month from the symposium, no refunds will be made.

If you sent a written notification of cancellation to the local Organizing Committee (Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.), refunds will be processed after the conference. Remember, an administrative charge (30% per participant) will be deducted from the cancelled amount.

 

The IG-EPN and IRD are pleased to inform that an important number of special grants were preferentially allocated to scientists and students from South America and will include registration fees and lodging (in double room) at the conference hotel (Hotel Mercure Alameda Quito). Recipients of these Special Grants were communicated in the previous weeks.

 

Your airport Transfer IN to symposium Hotel Mercure is included. If you would like to take advantage of the free airport transfer to the Hotel, please send us your complete flight information (Airline and Flight number, arrival and departure info) as soon as you can.

Airport transfer will only be provided to those who send their flight information and only between the nights of the 22nd and until the morning of the 24th of September.

Look for the sign “ISAG 8th Symposium Ecuador”

We require this information by September 10th. Send your flight information to Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.. Resend just to be sure your flight information was received.

In the case you have any flight delays or flight cancellations, please let us know by Email or Whatsapp/Text to +593 999 800 438 so we can coordinate a new pick up time for you.

 

Given that the official hotel is fully booked, we are not accepting additional reservations. Participants are invited to contact the organizing committee (Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.) which may provide other interesting options.

 

An Ice-breaker will take place on September 23th and a Conference closing cocktail on September 26th. The costs are included in the registration fees. To attend, please mark these options when registering on the webpage.

Organizers: R.A. Spikings (U. Genéve) and B. Beate (DG-EPN)

Dates: September 18th and 19th, 2019

The 2nd Workshop on Ecuadorian Geology will directly precede the International Symposium on Andean Geodynamics (ISAG), and will be held on the campus of the Escuela Politécnica National, Quito. The workshop is two days long, and we invite delegates to submit abstracts for oral presentations, which are presented in a single session during the first day, and the morning of the second day. We also encourage delegates to submit abstracts to the ISAG. Abstract are requested on all aspects of Ecuadorian geology, including field studies, structural, magmatic and metamorphic studies, sedimentary, petroleum and ore geology. We also encourage presentations that include the application of innovative analytical methods to Ecuadorian geology. The final afternoon is reserved for discussion groups, who regroup towards the end of the day and present their findings and recommendations to all delegates. The 1st Workshop occurred in September 2017, and was initiated to discuss the Geological Map of Ecuador, which was released by INIGEMM in 2017. Discussion groups during the 1st Workshop included, i) The Alamor-Lancones Basin, ii) Outstanding questions about the geology of the Cordillera Real, and iii) the geology of the Oriente Basin.

For information about this event please contact: Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo. or Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.

 

Organizers: Ph. Charvis (Geoazur), A. Alvarado (IGEPN)

Dates: September 27th and 28th, 2019

The aim of this project is to develop a pilot prototype of earthquake forecast model in Ecuador and in Peru where major earthquakes and tsunamis are likely to occur in the future. The novelty of the model is that it will integrate our complete knowledge on faults, including their seismic potential quantitatively evaluated from geodetic, seismological and geological approaches.

The primary deliverable is the anticipation of the location, size, frequency, ground motions of future destructive events. Our project includes a focus on hazards and vulnerability in Quito, and the development of a near real-time seismic response platform.

We will present the state of the art of the program including the deformation and seismic activity before and after the main shock of the Pedernales Mw=7.8 Earthquake which struck Ecuador in 2016. This program is supported by the grant ANR-15-CE04-0004 of the French National Research Agency, by the IG-EPN, IRD and CNRS.

For information about this event please contact: Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo. or Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.

 

Organizers: S. Hidalgo (IG-EPN), P. Samaniego (IRD), P. Mothes (IG-EPN), J.L. Le Pennec (IRD), B. Bernard (IG-EPN) M. Ruiz (IG-EPN), P. Ramon (IG-EPN)

Dates: September 28th to October 1st, 2019

Tungurahua volcano is one of the most active volcanoes of the Ecuadorian Andes. After ~75 years of quiescence, Tungurahua reactivated in October 1999 and remained active until the mid 2016. During this time, the volcano experienced low-to-moderate eruptive activity characterised by frequent canon-like explosions, local ash dispersal and frequent lahars. This pattern of activity changed in 2006, when the large subplinian eruptions occurred (July 14th and August 16th) and produced large pyroclastic density currents and regional tephra dispersal. Since then, eruptive activity evolved to short-lived vulcanian-like events followed by smaller explosions and almost frequent ash emissions (February 2008, May 2010, December 2012, July 2013, February and April 2014, February 2016).

The main goal of this workshop is to commemorate the 20 th anniversary of the begining of this eruption by bringing together volcanologist that have worked or still work on Tungurahua. We seek contributions from different approaches, such as physical volcanology, petrology, geophysics and those interested on the social issues associated with this long-lived eruption period.

For information about this event please contact: Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo. or Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.

 

8th ISAG

Strombolian activity at Tungurahua volcano. Photo by B. Bernard.


Leaders: O. Poma (Cornerstone Ecuador S.A.), Arturo Egüez (DG-EPN)

Dates: September 27th to 30th, 2019 (*)
(*) Due to flight’s reservations, we need people to sign up for this fieldtrip before June 3rd.
NOTE: If you want to participate in this fieldtrip and in a pre-conference field trip, please contact the organizing commitee.

Approx. cost: $660

Minimum number of participants: 15

Maximum number of participants: 20

The cretaceous Alamor-Lancones basin is located into the Huacabamba deflection, a geographic region which represents the transition between Central to Northern Andes, where the Cordillera change from NW to NE trend. The basin is limited by Triassic metamorphic blocks, the Amotape-Tahuin to the northwest and the Loja Terrane to the Southeast.

The Alamor-Lancones basin can be divided into a northwestern quartz-rich domain and a southeastern volcaniclastic domain (Jaillard et al, 1999). The earliest volcanism accompanying rifting is dominated by basaltic pillow lavas and breccias with related VMS deposits formed between 104 to 100 Ma. A second phase of felsic-rich volcanism with ages of 99 to 91 Ma intercalated and overlain by siliciclastic and carbonate sedimentary sequences in northwestern section of the basin (Winter, 2008), at this time the Bramaderos porphyry was deposited (Schutte, 2010) and possible related epithermal vein systems at its borders.

The aim of the field trip is go through the basin from the northwest area in the contact between metamorphic rocks and overlain sedimentary western domain toward the southeastern domain where dominated volcanism with porphyry and epithermal deposits are present on the upper sequences and ending in the lower basaltic sequences.

 

8th ISAG

Volcaniclastics and sediments near Bramaderos porphyry with strong argillic to phyllic alteration, cutting by late mineral andesitic dykes. Outcrop in the pan american highway. Photo by Osman Poma.


Leader: M. Mulas (ESPOL)

Dates: September 20th to 23th, 2019 (*)
(*) Due to flight’s reservations, we need people to sign up for this fieldtrip before June 3rd

Approx. cost: $ 600.

Minimum number of participants: 15

Maximum number of participants: 35

The southern sector of Ecuador (between 2°S and 6°S) has been characterized by intense magmatic activity in the period comprised between Oligocene and Miocene (Hungerbuhler et al. 2002). The volcanic sequence in the Pucará-Santa Isabel sector is composed by the Saraguro Fm. (26-21 Ma) followed by the St. Isabel Fm. (18 – 7.6 Ma) and closed by the Tarqui Fm. (6.3 Ma). These volcanic formations, made principally of welded ignimbrites, show large lithofacies variability (boulder size to lapilli size lithics, crystal rich to fiamme-rich ignimbrites) that reflects different PDC run-out and principally different sources. Stratigraphic and geomorphologic constraints allow to locate calderas structures (mean diameter 13 x 7-km) related with the Jubones and Santa Isabel ignimbritic eruptions.

 

8th ISAG

Fm. Jubones and Fm. Santa Isabel. Observation of fiammae and vithophyre. Photo by M. Mulas.


Leaders: R.A. Spikings (U. Genève), B. Beate (DG-EPN)

Dates: September 20th to 23th, 2019

Departure: September 20th at 07:00.

Field Trip nights included: September 20th, 21th & 22th

Notes: Night of September 19th is included at the Mercure hotel (shared basis)

If you are interested in participate in this fieldtrip, please contact our logistical team at Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.

 

The Eastern Cordillera of Ecuador is an Andean trending magmatic and metamorphic belt that exposes rocks spanning from the Palaeozoic basement to the modern active arc, and records the early disassembly of Pangaea in the Triassic, subsequent prolonged Jurassic - Early Cretaceous active margin magmatism during hyper-extension, and the collision and accretion of the Caribbean Large Igneous Province in the late Cretaceous. The field trip plans to make the following stops: (1) Ammonite bearing quartzites and slates of the Chaucha Block, which is considered to be para-autochthonous continental crust that rifted from South America during Early Cretaceous hyper-extension (stop close to the town of Alausi); (2) The Peltetec sequence, which is a tectonic melange that hosts ultra-mafic and mafic lithologies, which range in age from Neoproterozoic to Early Cretaceous, and is considered to have formed during the closure of an Early Cretaceous basin that was floored by a transitional mafic crust; (3) Tungurahua Volcano, which is part of the modern arc and has been continually erupting since 1999 until the mid-2016; (4) A west-to-east traverse across the Cordillera, where we will cross Triassic anatectites that formed during a rift-to-drift transition, and Jurassic-Early Cretaceous arc rocks that formed in a prevailing extensional setting.

 

8th ISAG

Sheared metasedimentary rocks of the Alao-Paute Arc, unconformably overlain by basaltic lavas of Volcano Tungurahua. (Town of Baños). Photo by R. Spikings.


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