Released
Dataset

COSC-1 operational report - Operational data sets

Cite as:

Lorenz, Henning; Rosberg, Jan-Erik; Juhlin, Christopher; Bjelm, Leif; Almqvist, Bjarne; Berthet, Théo; Conze, Ronald; Gee, David G.; Klonowska, Iwona; Pascal, Christophe; Pedersen, Karsten; Roberts, Nick; Tsang, Chinfu (2015): COSC-1 operational report - Operational data sets. GFZ Data Services. https://doi.org/10.1594/GFZ.SDDB.ICDP.5054.2015

Status

I   N       R   E   V   I   E   W : Lorenz, Henning; Rosberg, Jan-Erik; Juhlin, Christopher; Bjelm, Leif; Almqvist, Bjarne; Berthet, Théo; Conze, Ronald; Gee, David G.; Klonowska, Iwona; Pascal, Christophe; Pedersen, Karsten; Roberts, Nick; Tsang, Chinfu (2015): COSC-1 operational report - Operational data sets. GFZ Data Services. https://doi.org/10.1594/GFZ.SDDB.ICDP.5054.2015

There is a new version of this dataset:

  • https://dx.doi.org/10.5880/ICDP.5054.002
  • Abstract

    The Collisional Orogeny in the Scandinavian Caledonides (COSC) scientific drilling project focuses on mountain building processes in a major mid-Paleozoic orogen in western Scandinavia and its comparison with modern analogues. The transport and emplacement of subduction-related highgrade continent-ocean transition (COT) complexes onto the Baltoscandian platform and their influence on the underlying allochthons and basement will be studied in a section provided by two fully cored 2.5 km deep drill holes. This operational report concerns the first drill hole, COSC-1 (ICDP 5054-1-A), drilled from early May to late August 2014.
    COSC-1 is located in the vicinity of the abandoned Fröå mine, close to the town of Åre in Jämtland, Sweden and was planned to sample a thick section of the Seve Nappe and to penetrate its basal thrust zone into the underlying lower grade metamorphosed allochthon. Despite substantial technical problems, the drill hole reached 2495.8 m driller's depth and nearly 100 % core recovery was achieved. Surprising was the homogeneity of the Seve Nappe rocks, the unexpected thickness of its basal thrust zone (> 500 m) and that the drill hole, therefore, did not penetrate the bottom of the thrust zone. However, lower grade metasedimentary rocks were encountered in the lowermost part of the drill hole together with tens of metres thick mylonites that are, unexpectedly, rich in large garnets.
    The drill core was documented on-site and XRF scanned off site. During various stages of the drilling, the borehole was documented by comprehensive downhole logging. This operational report provides an overview over the COSC-1 operations from drilling preparations to the sampling party and describes the available datasets and sample material.

    Authors

    • Lorenz, Henning;Uppsala University, Department of Earth Sciences, Geophysics
    • Rosberg, Jan-Erik;Lund University, Engineering Geology
    • Juhlin, Christopher;Uppsala University, Department of Earth Sciences, Geophysics
    • Bjelm, Leif;Lund University, Engineering Geology
    • Almqvist, Bjarne;Uppsala University, Department of Earth Sciences, Geophysics
    • Berthet, Théo;Uppsala University, Department of Earth Sciences, Geophysics
    • Conze, Ronald;GFZ German Research Centre for Geosciences, Scientific Drilling ICDP
    • Gee, David G.;Uppsala University, Department of Earth Sciences, Geophysics
    • Klonowska, Iwona;Uppsala University, Department of Earth Sciences, Geophysics
    • Pascal, Christophe;University of Bochum, Institute of Geology, Mineralogy and Geophysics
    • Pedersen, Karsten;Chalmers University of Technology, Division of GeoEngineering
    • Roberts, Nick;British Geological Survey
    • Tsang, Chinfu;Lawrence Berkeley National Laboratory, Earth Sciences Division

    Contact

    Contributors

    COSC Consortium

    Keywords

    caledonides, COSC, deep hydrosphere, dynamics, europe, heat flow, himalaya, ICDP-2011/03, microbiology, norway, orogen, scandes, scandinavia, seismic, sweden, earth science

    GCMD Science Keywords

    Location

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      Files

      License: CC BY 4.0

      End of moratorium: /2017-03-01