Out-of-congress (IGCP-546-only) Field Trip "Geological transect through the evolution of an accretionary margin".

 

post-fieldtrip NOTE: The field trip was a complete success!!! About 40 persons attended the trip. The rocks inspected and the sequence of outcrops visited was superb, and interesting much discussions on Permian-Triassic, Mid-Cretaceous, Late Cretaceous and Tertiary events were held. Friendship among participants was strengthened (even more!), and new projects of research were set-up. The event couldn't be better! WE WANT TO THANK ORGANIZERS, IN PARTICULAR CESAR VINASCO, FOR THEIR SCIENTIFIC AND LOGISTICS WORK.

The 3-day fieldtrip will guide us through the various elements that formed the current western South American margin. These include:

• the pre-Mesozoic South American basement rocks,

• accreted metamorphosed mixed oceanic domains (Arquia Complex),

• an earlier Cretaceous unit with arc-affinity (Quebradagrande Complex),

• the Colombian-Caribbean plateau (CCP),

• Cretaceous intra-oceanic and continental margin sedimentary sequences,

• and various magmatic rocks that range from Cretaceous to Miocene, suggesting active magmatic activity through time.

DATE
September 3-5, 2011
 

FIELD TRIP LEADERS
Main leader: Cesar Vinasco (UNALMED; cvinasco@unal.edu.co)
With Contributions by: Marion Weber (Universidad Nacional de Colombia, Sede de Medellín, mweber@unalmed.edu.co), Agustin Cardona (Smithsonian Tropical Research Institute, Panama, cardonaa@si.edu), M. Areiza, Sergio Restrepo Moreno (STRI, Department of Geological Sciences, University of Florida, sergiorm@ufl.edu), James Pindell (Tectonic Analysis; jim@tectonicanalysis.com), Andres Pardo (Universidad de Caldas; andres.pardo@ucaldas.edu.co), L.M. Toro (Universidad de Caldas), and Mario Lara (Universidad Nacional de Colombia, sede Medellín, marioelarao@hotmail.com)

REGISTRATION
Maximum number of participants: 40.
Contact field-trip leaders for registration.

INSCRIPTION DEADLINE
June 15, 2011

COST
IGCP-546 shall cover the expenses of IGCP-546 members, including transportation, refreshments and hotel+breakfast. Participants should pay their dinner.

ACCOMMODATION
To be fixed by the organizing committee in hotels of Santa Fe de Antioquia and Ciudad Bolivar

PARTICIPANTS

James Pindell (Tectonic Analysis, UK; jim@tectonicanalysis.com)

Antonio Garcia Casco (University of Granada, Spain; agcasco@ugr.es)

Uwe Martens (Tectonic Analysis, USA; umartens@zoho.com)

Carl Nelson (Recursos del Caribe, USA, CNelson945@aol.com)

Carmen Nelson

Walter.V. Maresch (Ruhr-Universitaet Bochum, Germany, walter.maresch@rub.de)

Agustin Cardona (Smithsonian Tropical Research Institute, Panama, cardonaa@si.edu)

Juan Carlos Silva (Smithsonian Tropical Research Institute; jsilvatamayo@yahoo.com)

Marion Weber (Universidad Nacional de Colombia, Sede de Medellín, mweber@unalmed.edu.co)

Andres Pardo (Universidad de Caldas; andres.pardo@ucaldas.edu.co)

Jose Vicente Rodriguez

Jorge Restrepo (Universidad Nacional de Colombia, Sede de Medellín, jjrestrepoa@fastmail.fm)

Andres Bustamante (Universidade de Sao Paulo IG-USP, BRASIL; andresbl@aim.com)

Mónica Janeth Tobón (BHP Billiton, Cerro Matoso S.A, Monica.M.Tobon@bhpbilliton.com)

Francisco Velandia (Universidad Industrial de Santander, favelanp@uis.edu.co)

Gustavo Sarmiento (Universidad Nacional de Colombia, sede Bogotá, gasarmientop@gmail.com)

Carlos Zuluaga (Universidad Nacional de Colombia, sede Bogotá, cazuluagacas@unal.edu.co)

Andreas Kammer (Universidad Nacional de Colombia, sede Bogotá, kammer.andreas@gmail.com)

Victor Valencia (Universidad de Arizona, vicvalencia1@gmail.com)

John Lewis (George Washington University, jlewis@gwu.edu, Jfkdlewis@aol.com)

Gloria Sierra (Universidad Eafit, gsierra@eafit.edu.co)

Gabriel Rodriguez (grodrig@ingeominas.gov.co)

Wilson Enario Naranjo Merchan (UPTC- Sogamoso, wilson.naranjo@uptc.edu.co)

Cesar Vinasco (Universidad Nacional de Colombia, Sede de Medellín, cvinasco@unal.edu.co)

Sebastian Zapata (STRI, Panama, szapatah@gmail.com)

Students

Eliana Mejia Toro (Universidad Nacional de Colombia, sede Bogotá, elianamejiatoro@gmail.com)

Alejandra Alvarez (alejandra.alvarez212@gmail.com)

Jose Duque (Msc Estudiante UNAM, Mexico; jduquetr@gmail.com)

Yohana Villafañez Cardona (yohanavicar@gmail.com)

Lina Serrano (Universita di Padova; linaserranod@hotmail.com)

Jakeline Vanegas Arroyave (Est. Universidad Nacional de Colombia, sede Medellín, jvanegaa@gmail.com)

Samuel Jaramilo (sam.jaramillo.gi@hotmail.com)

Mario Lara (Universidad Nacional de Colombia, sede Medellín, marioelarao@hotmail.com)

Natalia Acevedo Gomez (Universidad Nacional de Colombia, Sede Medellín, naceved@unal.edu.co)

Maria Fernanda Areiza (Universidad Nacional de Colombia, Sede Medellín, mfareiza@unal.edu.co)

Andrea Lotero (Universidad Nacional de Colombia, sede Medellín, andrea.loterovelez@gmail.com)

Carolina Echeverry (carolaina22@gmail.com)

Sandra Mendez (scmendeze@gmail.com)

The participants (3 Sept, 2011).

VISA
Contact your travel agency.

The field trip is intended to show an overview of the complex transition of the Central Cordillera into the Western Cordillera through the RFS. The first day we will cross the Cauca Valley in the northern part of the area until reach rocks of the Western Cordillera represented by the Santa Fe Batolith. During the journey we will observe outcrops of the Amaga Formation and deformed rocks of the Arquía complex. The second day we will head to Ciudad Bolivar (Fig. 2) to see exposures of Barroso and Combia Formations. The third day we will go to La Pintada and Rio Arquia to observe mafic schist and garnetiferous amphibolites of the Arquía Complex. At the end of the afternoon we will back to Medellin.

Photos on-line in Picasa (click on Galería IGCP 2011 for full access to the available pictures of the field trip)

Day 1 (September 3)

Medellin- Santa Fe de Antioquia

In this area we can observe Tr (?) Amphibolites of the Central Cordillera and medium grade schist belonging to the Cajamarca Complex (Fig 2 - Yellow star 1).  The journey takes us to the Cauca Valley where Oligo-Miocene sediments of the Amaga Formation outcrops (Fig. 2- yellow star 2). Passing 5 kms in NW direction from Santa Fe de Antioquia, we are now fully located in the western cordillera domain (Fig. 2 yellow star 3). (see link of pictures - panoramical pictures).

We spend the night in Santa Fe de Antioquia where there are plenty of nice places for diner and drinking.

Day 2 (September 4)

Morning: Around Santa Fe de Antioquia within the RFS area of influence.

In this place outcrops L-tectonites Tr(?) gabbros and amphibolites. These mafic rocks are continuous with Pueblito diorite further south (Fig. 2 #6). Rodriguez et al. (2010) present evidence of intrusive contact with schist of Sabaletas (Fig. 2 # 5), implying a pre-mesozoic age for at least some fragments of the Arquia Complex (see link pictures – structures in schist). Other authors consider the contact as being regionally faulted of Sabaletas schist with Tr Pueblito diorite. We can observe west verging thrusting structures as the main type of faulted contacts in the area.

Finally we will ascend towards Llanadas village to the east. In this point outcrops schist of Cajamarca Complex again. This is an excelent point to observe landscapes to the west and south-west (see link pictures – panoramical pictures).

Afternoon: On the road to the south looking for La Pintada (Fig. 2). During the journey it is possible observe volcanics rocks of Mio-Pliocene Combia Formation and landscapes associated (see link pictures – panoramical pictures).

We will spend the night in Ciudad Bolivar.

Day 3. (September 5)

From Ciudad Bolivar we will head to the East to La Pintada. Passing la Pintada, we will visit the Rio Arquía to finally getting back to Medellin in the afternoon.

See larger view

We look forward to seeing you in Medellin in 2011!

last modified: 09.16.11 12:43 +0200