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Fieldwork 2018 by project C2 – 03.03 to 09.04.2018

In April 2018, the members of the subproject C2 successfully completed the second field trip to the westernmost part of the Atacama Desert. While fieldwork in 2017 dealt with coastal alluvial fans between Antofagasta and Mejillones, in total 4 alluvial fans distributed between Mejillones and Taltal were studied intensely in 2018.

The primary aim was to get insights into the timing and characteristics of transport and deposition along the western flank of the north-south running Coastal Cordillera. In order to establish a detailed geochronological framework of the alluvial fan systems, sampling was carried out for luminescence, electron spin resonance, cosmogenic nuclide and U/Th dating. In addition, at some alluvial fan surfaces, tephra samples could be collected to provide a potential independent age control. Furthermore, geomorphological mapping, and ground-based as well as aerial surveys were carried to understand the depositional history of the alluvial fans.

 

Alluvial fan at Quebrada de IzcuñaCoastal alluvial fan emerging from the Quebrada de Izcuña. The main alluvial fan is partly covered by an active dune

Photo: Janek Walk (view towards north)

 

OSL sampling at Quebrada de IzcuñaBeside sampling for luminescence and electron spin resonance dating techniques, in situ gamma ray measurements were carried out at the alluvial fan at the Quebrada de Izcuña

Photo: Janek Walk (view towards southeast)

 

dGPS measurements at PaposoMeasurements with a Differential Global Positioning System (dGPS) on the coastal alluvial fan at Paposo. Note the granitoid boulder in the foreground, which was sampled for cosmogenic nuclide exposure dating

Photo: Janek Walk (view towards north)

 



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Contact

  Speaker:
Prof. Dr. Tibor J. Dunai
Institute of Geology and Mineralogy | University of Cologne
Zülpicher Str. 49b | 50674 Cologne
+49 (0)221 470-3229 | tdunai@uni-koeln.de
  Managing Director:
Christian Tiede
Institute of Geology and Mineralogy | University of Cologne

Zülpicher Str. 49b | 50674 Cologne
+49 (0)221 470-89833 | christian.tiede@uni-koeln.de
       
  Deputy Speaker:
Prof. Dr. Martin Melles
Institute of Geology and Mineralogy | University of Cologne

Zülpicher Str. 49a | 50674 Cologne
+49 (0)221 470-2262 | mmelles@uni-koeln.de
  Webmaster:
Tim Schlüter
Institute of Geography | University of Cologne

Otto-Fischer-Str. 4 | 50674 Cologne
+49 (0)221 470-3735 | webmaster@sfb1211.de

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