The Rødryggen-1 and Brorson Halvø-1 fully cored boreholes (Upper Jurassic – Lower Cretaceous), Wollaston Forland, North-East Greenland – an introduction

• Published in: GEUS Bulletin
• Main Authors: Bojesen-Koefoed, Jørgen A., Alsen, Peter, Bjerager, Morten, Hovikoski, Jussi, Ineson, Jon R., Johannessen, Peter N., Olivarius, Mette, Piasecki, Stefan, Vosgerau, Henrik
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2023
• Subjects: biostratigraphy; geochemistry; sedimentology; stratigraphic boreholes; technical data; East Greenland; Greenland; North Atlantic; Wollaston forland; Siberia
• Online Access: https://curis.ku.dk/portal/da/publications/the-roedryggen1-and-brorson-halvoe1-fully-cored-boreholes-upper-jurassic--lower-cretaceous-wollaston-forland-northeast-greenland--an-introduction(63a083a1-049c-46bf-8a61-6c2d65f823e1).html; https://doi.org/10.34194/geusb.v55.8350; https://curis.ku.dk/ws/files/379035835/GEUS8350.pdf

Two fully cored boreholes, the Rødryggen-1 and the Brorson Halvø-1, were drilled in Wollaston Forland, North-East Greenland, in 2009 and 2010, respectively. The objective was to test the stratigraphic development of the Upper Jurassic – Lower Cretaceous mud-dominated succession in two different settings within the same fault block of a developing half-graben: centrally (Rødryggen-1 borehole) and near the uplifted crest of the rotating fault block (Brorson Halvø-1 borehole). The drilled deposits are equivalent to the principal petroleum source-rock sequence of the petrolifer-ous basins of North-West Europe, Siberia, and basins off eastern Canada and provide a new record of an important phase of marine deoxygenation in the proto-North Atlantic region.