10.1594/GFZ.SDDB.ICDP.5054.2015 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2021-05-18 urn:ogc:def:crs:EPSG:4326 COSC-1 operational report - Operational data sets 2021-05-18 revision 2015-03-10 creation doi:10.1594/GFZ.SDDB.ICDP.5054.2015 Lorenz, Henning Uppsala University, Department of Earth Sciences, Geophysics author Rosberg, Jan-Erik Lund University, Engineering Geology author Juhlin, Christopher Uppsala University, Department of Earth Sciences, Geophysics author Bjelm, Leif Lund University, Engineering Geology author Almqvist, Bjarne Uppsala University, Department of Earth Sciences, Geophysics author Berthet, Théo Uppsala University, Department of Earth Sciences, Geophysics author Conze, Ronald GFZ German Research Centre for Geosciences, Scientific Drilling ICDP author Gee, David G. Uppsala University, Department of Earth Sciences, Geophysics author Klonowska, Iwona Uppsala University, Department of Earth Sciences, Geophysics author Pascal, Christophe University of Bochum, Institute of Geology, Mineralogy and Geophysics author Pedersen, Karsten Chalmers University of Technology, Division of GeoEngineering author Roberts, Nick British Geological Survey author Tsang, Chinfu Lawrence Berkeley National Laboratory, Earth Sciences Division author GFZ Data Services publisher 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. Complete Lorenz, Henning Uppsala University, Department of Earth Sciences, Geophysics henning.lorenz@geo.uu.se pointOfContact COSC Consortium http://cosc.icdp-online.org informtion pointOfContact caledonides COSC deep hydrosphere dynamics europe heat flow himalaya ICDP-2011/03 microbiology norway orogen scandes scandinavia seismic sweden earth science GEMET - INSPIRE themes, version 1.0 publication EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > METAMORPHIC ROCKS > METAMORPHIC ROCK FORMATION NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 10.5194/sd-19-1-2015 DOI IsSupplementTo 10273/ICDP5054EHW1001 Handle References 10273/ICDP5054EHX1001 Handle References 10273/ICDP5054EH02001 Handle References 10.2312/ICDP.2015.001 DOI IsDocumentedBy 10.2312/ICDP.2015.002 DOI IsReferencedBy 10.5880/ICDP.5054.001 DOI IsCitedBy 10.5334/dsj-2017-002 DOI IsCitedBy 10.5880/ICDP.5054.002 DOI IsPreviousVersionOf eng geoscientificInformation Åre, Jämtlands län, Sweden 13.2031 13.2031 63.4063 63.4063 2013-09-05 2014-10-11 http://doi.org/10.1594/GFZ.SDDB.ICDP.5054.2015 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information