2026-08-05T01:00:20Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:69752026-06-10T10:11:48ZDOIDBDOIDB.GFZ

false4DOIDB.GFZ 10.5880/GFZ.2.7.2020.001 Weckmann, Ute Ute Weckmann 0000-0002-4142-1018 GFZ German Research Centre for Geosciences, Potsdam, Germany Bauer, Klaus Klaus Bauer 0000-0002-7777-2653 GFZ German Research Centre for Geosciences, Potsdam, Germany Krawczyk, Charlotte Charlotte Krawczyk 0000-0002-5505-6293 GFZ German Research Centre for Geosciences, Potsdam, Germany Technical University Berlin, Institute for Applied Geosciences, Berlin, Germany Kück, Jochem Jochem Kück 0000-0002-5155-0454 GFZ German Research Centre for Geosciences, Potsdam, Germany Übernickel, Kirstin Kirstin Übernickel 0000-0002-3585-7309 University of Tübingen, Tübingen, Germany von Blanckenburg, Friedhelm Friedhelm von Blanckenburg 0000-0002-2964-717X GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ Data Services 2020 geophysical borehole logging televiewer Full seismic wave fields electrical resistivity gamma ray spontaneous potential single point resistance seismic p wave velocities seismic s-wave velocities EarthShape Chile Coastal Cordillera Private Reserve Santa Gracia In Situ/Laboratory Instruments > Recorders/Loggers > WELL LOGGING TOOLS Weckmann, Ute Ute Weckmann 0000-0002-4142-1018 GFZ German Research Centre for Geosciences, Potsdam, Germany Weckmann, Ute Ute Weckmann 0000-0002-4142-1018 GFZ German Research Centre for Geosciences, Potsdam, Germany Bauer, Klaus Klaus Bauer 0000-0002-7777-2653 GFZ German Research Centre for Geosciences, Potsdam, Germany Krawczyk, Charlotte Charlotte Krawczyk 0000-0002-5505-6293 GFZ German Research Centre for Geosciences, Potsdam, Germany Technical University Berlin, Institute for Applied Geosciences, Berlin, Germany Kück, Jochem Jochem Kück 0000-0002-5155-0454 GFZ German Research Centre for Geosciences, Potsdam, Germany Übernickel, Kirstin Kirstin Übernickel 0000-0002-3585-7309 University of Tübingen, Tübingen, Germany von Blanckenburg, Friedhelm Friedhelm von Blanckenburg 0000-0002-2964-717X GFZ German Research Centre for Geosciences, Potsdam, Germany Araya Vargas, Jaime Jaime Araya Vargas 0000-0003-1064-9252 Pontificia Universidad Católica de Chile, Santiago, Chile Weckmann, Ute GFZ German Research Centre for Geosciences, Potsdam, Germany 2022-06-30/2 2020-11-25 2019-04-02/2019-04-02 Dataset 10.1038/s41598-021-90267-7 https://www.earthshape.net/ CC BY 4.0 The DFG funded DeepEarthshape project within the SPP1803 EarthShape (second phase) combines several geoscientific methods and approaches to study the weathering zone in detail in dependence of climate conditions. Projects of the first phase have shown that the weathering zone is much deeper than expected, so that the weathering front was never encountered in the excavated soil pits. At depth of 1 – 2 m appreciable amounts of microbial biomass and DNA counts were encountered. It was further found that bacteria and archaea colonizing rock surfaces are close relatives to those from deeper soil zones. Because we do not know a) the depth of weathering; b) the process advancing it; c) whether this advance is driven by water, gases, and/or biological activity and concentrated along faults; d) whether this zone presents a habitat and interacts with the surface biosphere, we have designed a drilling campaign at all four study sites for joint geochemical, biogeochemical and microbiological exploration and a geophysical campaign for imaging the depth and physical properties of the critical zone. The principle hypotheses of the DeepEarthshape projects are: 1) The advance of the weathering front at depth is a recent process that is linked to climate and coupled with erosion at the surface through a biogeochemical feedback 2) Microbial activity in the deep regolith that advances weathering, is fuelled by young organic matter. The four study sites are distributed along the coast of Chile to have a similar geological setting but different climatic conditions.

Here we present the logging data of the first geophysical borehole survey which took place at the Private Reserve Santa Gracia, 40 km NE of La Serena (Coquimbo Region, Chile). The data were acquired on the 2nd of April 2019. The borehole logging was conducted by COMPROBE. The vertical borehole reached down to 87.2 m depth and had a diameter (PQ) of 83.5 mm.

The acoustic televiewer data are freely accessible now in .dlis and PDF formats. The original data files are embargoed until 30 June 2022 and will be accessible via this page afterwards.
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.
Drill site in Private Reserve Santa Gracia Deutsche Forschungsgemeinschaft http://doi.org/10.13039/501100001659 WE3829/13-1 Gides - SPP1803