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Production drilling at WAIS Divide

  • Kristina R. Slawny (a1), Jay A. Johnson (a1), Nicolai B. Mortensen (a1), Christopher J. Gibson (a1), Joshua J. Goetz (a1), Alexander J. Shturmakov (a1), Donald A. Lebar (a1) and Anthony W. Wendricks (a1)...
Abstract

The deep ice-sheet coring (DISC) drill was used for production ice-core drilling at WAIS Divide in Antarctica for six field seasons between 2007 and 2013. Continuous ice-core samples were obtained between the snow surface and 3405 m depth. During the 2012/13 austral summer, the DISC drill’s newly designed replicate ice-coring system was utilized to collect nearly 285m of additional high-quality core samples at depths of high scientific interest. Annual progress graphs are described, as well as milestones achieved over the course of the project. Drilling operations, challenges encountered, drill fluid usage, drilling results, and the drill crew’s experiences with the DISC drill and replicate coring system during production drilling are described and discussed in detail. Core-processing operations are described briefly, as well as the logistical undertaking of the DISC drill’s deployment to Antarctica.

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References
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Banta, JR, McConnell, JR, Frey, MM, Bales, RC and Taylor, K (2008) Spatial and temporal variability in snow accumulation at the West Antarctic Ice Sheet Divide over recent centuries. J. Geophys. Res., 113(D23), D23102 (doi: 10.1029/2008JD010235)
Gibson, CJ, Johnson, JA, Shturmakov, AJ, Mortensen, NB and Goetz, JJ (2014) Replicate ice-coring system architecture: mechanical design. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A019) (see paper in this issue)
Johnson, JA and 7 others (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 5. Experience during Greenland field testing. Ann. Glaciol., 47, 5460 (doi: 10.3189/172756407786857730)
Johnson, JA, Mortensen, NB, Gibson, CJ, Goetz, JJ and Shturmakov, AJ (2014) Replicate ice-coring system testing. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A034) (see paper in this issue)
Mason, WP, Shturmakov, AJ, Johnson, JA and Haman, S (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 2. Mechanical design. Ann. Glaciol., 47, 3540 (doi: 10.3189/172756407786857640)
Mortensen, NB, Sendelbach, PJ and Shturmakov, AJ (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 3. Control, electrical and electronics design. Ann. Glaciol., 47, 4150 (doi: 10.3189/172756407786857668)
Mortensen, NB, Goetz, JJ, Gibson, CJ, Johnson, JA and Shturmakov, AJ (2014) Replicate ice-coring system architecture: electrical/electronic/software design. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A014) (see paper in this issue)
Shturmakov, AJ and Sendelbach, PJ (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 4 . Drill cable. Ann. Glaciol., 47, 5153
Shturmakov, AJ, Lebar, DA, Mason, WP and Bentley, CR (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 1 . Design concepts. Ann. Glaciol., 47, 2834 (doi: 10.3189/172756407786857811)
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Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
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