Articles | Volume 30
Sci. Dril., 30, 43–57, 2022
https://doi.org/10.5194/sd-30-43-2022
Sci. Dril., 30, 43–57, 2022
https://doi.org/10.5194/sd-30-43-2022
Science report
25 Feb 2022
Science report | 25 Feb 2022

COSC-2 – drilling the basal décollement and underlying margin of palaeocontinent Baltica in the Paleozoic Caledonide Orogen of Scandinavia

Henning Lorenz et al.

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Cited articles

Andersson, A., Dahlman, B., Gee, D. G., and Snäll, S.: The Scandinavian Alum Shales, Sveriges geologiska undersökning, Uppsala, 50 pp., ISBN 91-7158-334-3, 1985. 
Beckholmen, M.: Geology of the Nordhallen–Duved–Greningen area in Jämtland, central Swedish Caledonides, Geol. Fören. Stockh. Förh., 100, 335–347, https://doi.org/10.1080/11035897809454471, 1978. 
Conze, R., Lorenz, H., Ulbricht, D., Elger, K., and Gorgas, T.: Utilizing the International Geo Sample Number Concept in Continental Scientific Drilling During ICDP Expedition COSC-1, Data Sci. J., 16, p. 2, https://doi.org/10.5334/dsj-2017-002, 2017. 
Drake, H., Roberts, N. M. W., and Whitehouse, M. J.: Geochronology and Stable Isotope Analysis of Fracture-Fill and Karst Mineralization Reveal Sub-Surface Paleo-Fluid Flow and Microbial Activity of the COSC-1 Borehole, Scandinavian Caledonides, Geosciences, 10, 56, https://doi.org/10.3390/geosciences10020056, 2020. 
Dyrelius, D.: Aeromagnetic interpretation in a geotraverse area across the central Scandinavian Caledonides, Geol. Fören. Stockh. Förh., 102, 421–438, https://doi.org/10.1080/11035898009454498, 1980. 
Short summary
The Collisional Orogeny in the Scandinavian Caledonides project provides insights into the deep structure and bedrock of a ca. 400 Ma old major orogen to study deformation processes that are hidden at depth from direct access in modern mountain belts. This paper describes the successful operations at the second site. It provides an overview of the retrieved geological section that differs from the expected and summarises the scientific potential of the accomplished data sets and drill core.