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ins.: 2020-08-14 08:53; ( Age: 4 yrs )
By: Scientists
Category: COSC_

COSC: 2020-08-13

The drilling at the COSC-2 site is successfully concluded.

The drilling at the COSC-2 site is successfully concluded. A big thank you to the on-site science team and the technical/drilling team. After the main borehole (COSC-2A) to 2276 m, the short COSC-2B was cored within 2 days. It is located 70 cm from COSC-2A and reached 116 m. It covers the top interval of COSC-2A. Overall, drilling went well. After mobilisation the operations started on 14th April. Down to 1575 m, the the core diameter is 61 mm (H-size) and from 1575 to 2275 m it is 45 mm (N-size). The borehole is now open (uncased) below the 100 m surface casing. The geology of COSC-2A held some surprises for us, mainly the level of main Caledonian décollement, the stratigraphy of the "imbricated section" and the type of basement encountered. Upcoming: Sep 2020: Downhole logging; Winter 2020/2021: Core description; Early 2021: Data ready & sampling party.