EPICA Dronning Maud Land EDML ice core drilling protocol

doi:doi:10.1594/PANGAEA.841035

EPICA Dronning Maud Land EDML ice core drilling protocol

We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.

BibTex:

@dataset{Wilhelms_Frank_and_Miller_Heinz_and_Gerasimoff_Michael_D_and_Drücker_Cord_and_Frenzel_Andreas_and_Fritzsche_Diedrich_and_Grobe_Hannes_and_Hansen_Steffen_Bo_and_Hilmarsson_Sverrir_Æ_and_Hoffmann_Georg_and_Hörnby_Kerstin_and_Jaeschke_Andrea_and_Jakobsdottir_Steinunn_S_and_Juckschat_Paul_and_Karsten_Achim_and_Karsten_Lorenz_and_Kaufmann_Patrik_R_and_Karlin_Torbjörn_and_Kohlberg_Eberhard_and_Kleffel_Guido_and_Lambrecht_Anja_and_Lambrecht_Astrid_and_Lawer_Gunther_and_Schärmeli_Ivan_and_Schmitt_Jochen_and_Sheldon_Simon_G_and_Takata_Morimasa_and_Trenke_Marcus_and_Twarloh_Birthe_and_Valero_Delgado_Fernando_and_Wilhelms-Dick_Dorothee_2014,
    abstract = {We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.},
    author = {Wilhelms, Frank and Miller, Heinz and Gerasimoff, Michael D and Drücker, Cord and Frenzel, Andreas and Fritzsche, Diedrich and Grobe, Hannes and Hansen, Steffen Bo and Hilmarsson, Sverrir Æ and Hoffmann, Georg and Hörnby, Kerstin and Jaeschke, Andrea and Jakobsdottir, Steinunn S and Juckschat, Paul and Karsten, Achim and Karsten, Lorenz and Kaufmann, Patrik R and Karlin, Torbjörn and Kohlberg, Eberhard and Kleffel, Guido and Lambrecht, Anja and Lambrecht, Astrid and Lawer, Gunther and Schärmeli, Ivan and Schmitt, Jochen and Sheldon, Simon G and Takata, Morimasa and Trenke, Marcus and Twarloh, Birthe and Valero Delgado, Fernando and Wilhelms-Dick, Dorothee},
    doi = {10.1594/PANGAEA.841035},
    institution = {PANGAEA (Cryosphere)},
    title = {EPICA Dronning Maud Land EDML ice core drilling protocol},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-841035},
    year = {2014}
}