|Title||Mechanical Drill for Deep Coring in Temperate Ice|
|Author(s)||Bragi Árnason , Helgi Björnsson, Páll Theodórsson|
Journal of Glaciology
A rotary drill for deep coring in temperate ice has been constructed and tested. The total length of the drill is 6 m and its weight is 100 kg. A steel armoured cable carries power to the 2 h.p, electric motor of the drill. The diameter of the core is 90 mm and the maximum length of core is 2 m. An antifreeze mixture at the bottom of the hole was necessary to prevent refreezing of ice chips on the cutting bits.
A 415 m deep hole was drilled during the summer of 1972 into the temperate accumulation area of Vatnajökull. Core recovery was 99%. Because of a fault in the cable the bottom was not reached.
|Equipment||Icelandic Temperate Glacier Drill|
|Citation||Bragi Árnason , Helgi Björnsson, Páll Theodórsson ( 1974 ) Mechanical Drill for Deep Coring in Temperate Ice. Journal of Glaciology , 13 , 67 , 133-139 . doi: 10.3189/S0022143000023443|