Geology Reference
In-Depth Information
Table 4 .7.
Some experimental data that demonstrate the instability of quartz particles when subject to cryogenic weathering.
Condition of Experiment
Mineral
Content of Grain Size (%)
Diameter of Grain (mm)
0.25-0.1
0.1-0.05
0.05-0.01
0.01-0.005
0.005-0.001
1. Before experiment
Quartz
100
-
-
-
-
Feldspar
100
-
-
-
-
Calcite
100
-
-
-
-
Biotite
100
-
-
-
-
2. Freezing-thawing
−
10 °C to
+
15 °C
Quartz
11
20
68
1
-
water-saturated
Feldspar
7
44
48
1
1
Calcite
6
1
20
30
29
Biotite
98
-
1
-
1
3. Freezing-heating dry
−
10 °C to
+
50 °C
Quartz
98.5
1
0.5
-
-
Feldspar
98
1.5
0.5
-
-
Calcite
93.5
5
1
0.5
-
Biotite
100
-
-
-
-
4. Wetting-drying in
+
18 to
+
20 °C
Quartz
100
-
-
-
-
laboratory condition
Feldspar
100
-
-
-
-
Calcite
100
-
-
-
-
Biotite
100
-
-
-
-
Source: Konishchev and Rogov (1993). Reproduced by permission of John Wiley & Sons Ltd.
