Agile Sub-Ice Geological (ASIG) Drill development and Pirrit Hills field project.

A new drilling system was developed by the US Ice Drilling Program (IDP) to rapidly drill through overlying ice to collect subglacial rock cores. The Agile Sub-Ice Geological (ASIG) Drill system is capable of drilling up to 700m of ice in a continuous manner. Intermittent ice core samples can be taken as needed. Ten-plus meters of subglacial bedrock and unconsolidated, frozen sediment cores can be drilled with wireline core retrieval. The functionality of the drill system was demonstrated in 2016-17 at the Pirrit Hills, Antarctica where 8m of high-quality, continuous granite core was retrieved beneath 150m of ice. The particulars of the drill system development, features and performance are discussed. [ABSTRACT FROM AUTHOR]