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Physical and geochemical data on a drill core from the semi-arid Coastal Cordillera, Chile

Cite as:

Krone, Laura V.; Hampl, Ferdinand J.; Schwerdhelm, Christopher; Bryce, Casey; Ganzert, Lars; Kitte, Axel; Übernickel, Kirstin; Dielforder, Armin; Aldaz, Santiago; Oses-Pedraza, Rómulo; Perez, Jeffrey Paulo H.; Sanchez-Alfaro, Pablo; Wagner, Dirk; Weckmann, Ute; von Blanckenburg, Friedhelm (2021): Physical and geochemical data on a drill core from the semi-arid Coastal Cordillera, Chile. GFZ Data Services. https://doi.org/10.5880/GFZ.3.3.2021.002

Status

I   N       R   E   V   I   E   W : Krone, Laura V.; Hampl, Ferdinand J.; Schwerdhelm, Christopher; Bryce, Casey; Ganzert, Lars; Kitte, Axel; Übernickel, Kirstin; Dielforder, Armin; Aldaz, Santiago; Oses-Pedraza, Rómulo; Perez, Jeffrey Paulo H.; Sanchez-Alfaro, Pablo; Wagner, Dirk; Weckmann, Ute; von Blanckenburg, Friedhelm (2021): Physical and geochemical data on a drill core from the semi-arid Coastal Cordillera, Chile. GFZ Data Services. https://doi.org/10.5880/GFZ.3.3.2021.002

Abstract

This dataset contains petrophysical, geochemical, and mineralogical data from a drilling core from the Coastal Cordillera, Chile. The drilling campaign in the semi-arid field site Reserve Santa Gracia was conducted in the framework of the “EarthShape” project (DFG SPP1803) to study deep weathering along a climate gradient. Previous studies in this area found that the weathering front is located much deeper than expected (Oeser et al., 2018). To explore the weathering profile and the depth of the weathering front, we performed various geochemical, petrophysical, and mineralogical analyses. The drilling campaign was conducted in March and April 2019, using the wireline drilling method with a standard industry truck-mounted PQ3-sized (85 mm core diameter, 123 mm hole diameter) rotary drilling rig (Sondajes Araos E.I.R.L.). A detailed description of the drilling activities is given in Krone et al. (2021). The retrieved core runs with a maximum length of 1.5 m were drilled using potable water, with added contamination control tracer for further microbiological analyses of the rock. As basis for our detailed study of deep weathering we determined the porosity, density, specific surface area, elemental composition, mineralogical composition, Fe oxidation, and the degree of weathering from chemical depletion, volumetric strain, and the weathering rate using the in situ cosmogenic nuclide beryllium-10 (10Be).

Additional Information

The DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota" (2016-2022; https://www.earthshape.net/) explored between scientific disciplines and includes geoscientists and biologists to study from different viewpoints the complex question how microorganisms, animals, and plants influence the shape and development of the Earth’s surface over time scales from the present-day to the young geologic past. All study sites are located in the north-to-south trending Coastal Cordillera mountains of Chile, South America. These sites span from the Atacama Desert in the north to the Araucaria forests approximately 1300 km to the south. The site selection contains a large ecological and climate gradient ranging from very dry to humid climate conditions.

Authors

  • Krone, Laura V.;GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany
  • Hampl, Ferdinand J.;Department of Applied Geochemistry, Technische Universität Berlin, Germany
  • Schwerdhelm, Christopher;Department of Geosciences, Eberhard Karls Universität Tübingen, Germany
  • Bryce, Casey;Department of Geosciences, Eberhard Karls Universität Tübingen, Germany; now at: Department of Earth Sciences, University of Bristol, UK
  • Ganzert, Lars;GFZ German Research Centre for Geosciences, Geomicrobiology, Potsdam, Germany
  • Kitte, Axel;GFZ German Research Centre for Geosciences, Geomicrobiology, Potsdam, Germany
  • Übernickel, Kirstin;Department of Geosciences, Eberhard Karls Universität Tübingen, Germany
  • Dielforder, Armin;GFZ German Research Centre for Geosciences, Lithosphere Dynamics, Potsdam, Germany;Leibniz Universität, Institute of Geology, Hannover Germany
  • Aldaz, Santiago;GFZ German Research Centre for Geosciences, Geomechanics and Scientific Drilling, Potsdam, Germany
  • Oses-Pedraza, Rómulo;CRIDESAT, Universidad de Atacama, Copiapó, Chile
  • Perez, Jeffrey Paulo H.;GFZ German Research Centre for Geosciences, Potsdam, Germany
  • Sanchez-Alfaro, Pablo;Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Valdivia, Chile
  • Wagner, Dirk;GFZ German Research Centre for Geosciences, Potsdam, Germany;Universität Potsdam, Institute of Geosciences, Potsdam, Germany
  • Weckmann, Ute;GFZ German Research Centre for Geosciences, Geophysical Imaging, Potsdam, Germany
  • von Blanckenburg, Friedhelm;GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany;Freie Universität Berlin, Institute of Geological Sciences, Berlin, Germany

Contact

  • Krone, Laura V. (PhD student) ; GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany;
  • von Blanckenburg, Friedhelm (Head of GFZ Section 3.3: „Earth Surface Geochemistry“; Professor of the Geochemistry of the Earth Surface, Freie Universität Berlin) ; GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; Freie Universität Berlin, Institute of Geological Sciences, Berlin, Germany;

Keywords

critical zone, rock fracturing, rock weathering, EarthShape, Private Reserve Santa Gracia, Chile, Coastal Cordillera, compound material > igneous material > igneous rock, compound material > igneous material > igneous rock > phaneritic igneous rock > granitoid, compound material > igneous material > intermediate composition igneous material > intermediate composition igneous rock > dioritoid > monzodioritic rock, compound material > igneous material > intermediate composition igneous material > intermediate composition igneous rock > dioritoid > monzodioritic rock > quartz monzodiorite, industrial process > drilling, land > natural area > terrestrial area > arid land, lithosphere > earth's crust > fault

GCMD Science Keywords

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    License: CC BY 4.0

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