Geology Reference
In-Depth Information
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Figure 2.2a.
Six seasons of ANSMET activities at a single icefield demonstrating reconnaissance and systematic styles of searching. An
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite image of the Miller Range northern icefield is
shown with finds and snowmobile traces for each season as labeled. Boxes, dots, and so on show individual finds in various colors. In all
seasons, the path of a single GPS-equipped snowmobile is shown to demonstrate search activity; one or more additional snowmobiles
would have also been active. The first visit, in 1985 (upper left), was a single overflight by helicopter; one meteorite was recovered. A two-
person reconnaissance visit in 1999 (upper right) led to the recovery of 30 specimens, with searching suspended after two days given clear
signs of a major concentration. A four-person team conducted extensive reconnaissance throughout the Miller Range in 2003 (middle left),
recovering meteorites and documenting the need for systematic meteorite recoveries. The weather-plagued first season of systematic recov-
eries in 2005 (middle right) concentrated primarily on the northern icefield, with most systematic searches on the eastern side and including
a few reconnaissance trips to nearby ice patches. Systematic meteorite recoveries from the northern icefield continued during the 2007 field
season (lower left) and were completed in 2009 (lower right) with the middle icefield (extreme lower right) as a main target of activity.
