TABLE 1.

Summary of samples, drill bit types, fluorescent-microsphere application methods, and fluorescent-microsphere penetration

Sample siteDepth (m)Sample typeApplication methodaDrill bitbDepth of penetration (mm)c
Eu1d11.58PermafrostCTC5
11.58PermafrostCTC2
11.58PermafrostCTC2
Eu22.06Ground iceCTC5
Eu36.48Ground iceCSA6
6.61Ground iceCSA2
7.15Ground iceBSA4
  • a Method of fluorescent-microsphere application: B, fluorescent-microsphere plug; C, fluorescent-microsphere painting.

  • b Drill bits used: TC, tungsten carbide; SA, Sipre auger.

  • c Depth of fluorescent-microsphere penetration as measured from the exterior of the core sample.

  • d Site Eu1 at 11.58 m was sampled three separate times for fluorescent-microsphere analysis.