Iodine in the Soil
Rock
All of these locations are within 30 meters. The most important result is the significant variations in
iodine content at various depths. Only the surface yields repeatable results.
Sample Depth Analysis Mean Std Dev 95% confidence
Surface 3.3, 3.1, 3.3, 2.9, 3.2, 3.3, 2.9 3.1 0.18 2.94 - 3.35
-6 in. 4.2, 4.4, 5.7, 3.6, 3.9, 5.3, 5.0 4.6 0.77 3.72 - 5.45
-12 in. 7.3, 5.3, 9.2, 10.7, 6.5, 6.1, 5.3 7.2 2.05 4.90 - 9.50
-24 in. 9.2, 5.0, 9.8, 9.5, 10.5, 5.2, 4.7 7.7 2.59 4.79 - 10.61
-36 in. 8.6, 4.2, 10.2, 7.5, 6.5, 3.8, 3.8 6.4 2.54 3.52 - 9.23
iodine content at various depths. Only the surface yields repeatable results.
Sample Depth Analysis Mean Std Dev 95% confidence
Surface 3.3, 3.1, 3.3, 2.9, 3.2, 3.3, 2.9 3.1 0.18 2.94 - 3.35
-6 in. 4.2, 4.4, 5.7, 3.6, 3.9, 5.3, 5.0 4.6 0.77 3.72 - 5.45
-12 in. 7.3, 5.3, 9.2, 10.7, 6.5, 6.1, 5.3 7.2 2.05 4.90 - 9.50
-24 in. 9.2, 5.0, 9.8, 9.5, 10.5, 5.2, 4.7 7.7 2.59 4.79 - 10.61
-36 in. 8.6, 4.2, 10.2, 7.5, 6.5, 3.8, 3.8 6.4 2.54 3.52 - 9.23
The comparison of the two high density profiles demonstrate a major problem with arbitrary
subsurface sampling. Even if the sampling procedure involved a soil profile analysis, a rock, just
below the sampling depth would never be detected. The differences in the iodine concentrations
between the rock and no rock locations are just as profound in the CASE tool and would probably
affect all geochemical tools including soil gases.
subsurface sampling. Even if the sampling procedure involved a soil profile analysis, a rock, just
below the sampling depth would never be detected. The differences in the iodine concentrations
between the rock and no rock locations are just as profound in the CASE tool and would probably
affect all geochemical tools including soil gases.
-6 in.
-12 in.
-18 in.
-24 in.
-36 in.
-48 in.
CASE Tool
Above Rock No Rock
Above Rock No Rock
GrayStone Exploration Labs, Inc.
| Research |
Surface