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Title: Prototype drill for core sampling fine-grained perennially frozen ground
Authors: Geological Survey (U.S.). Office of National Petroleum Reserve in Alaska.
Brockett, Bruce E.
Lawson, Daniel E.
Keywords: Arctic regions
Fine-grained materials
Frozen ground sampling
Core sampling
Core drilling
Ground ice
Coring auger
Frozen ground
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 85-1.
Description: CRREL Report
Abstract: An inexpensive auger drill has been developed to provide researchers with the ability to auger an open hole or to acquire continuous, undisturbed 76-mm-diameter core samples of a variety of perennially frozen materials that are suitable for chemical and petrographic analysis. It was developed by field testing in support of research from 1980 to 1983. Operation of the drill is based mainly on using a minimum of power to cut through frozen ground with tungsten carbide cutters on a CRREL coring auger. The ice content, temperature and grain size of the frozen sediments are important variables determining the sampling depth. Perennially frozen sediments with temperatures in the range of -0.5°C to -8.5°C have been continuously cored with this drill. Drilling and sampling are most efficiently conducted when ambient air temperatures are below freezing and the active layer is frozen. The self-contained light-weight drill is readily transportable off-road by helicopter or tracked vehicle, or by towing over roads. It is locally self-mobile by use of a winch. Total cost of the drill and modifications is estimated at approximately $10,000.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

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