Geology Reference
In-Depth Information
Table 16.2
Number and weights of diamonds from nine digging operations along the Kwango River
Group
Parcels
Origin
Stones (n)
Weight (cts)
Carats/stone (cts/stn)
3
40, 41
Flats 5 and 8
286
21.11
0.074
2
13, 22-39, 42
Second splay, K56N, K56S, Flat 13/14
1,338
129.83
0.097
1
1-21 (excl. 13)
K97, K105
1,110
131.47
0.118
Total
2,734
282.41
0.103
Table 16.3
Percentage of diamond colours and shapes for the three Groups in the Lower Kwango diamond groups
Group
No of stones
Colourless
Brown
Yellow
Fragments
Abrasion features
Octa
Dode
Maccle
Cube
3
29
51.7
20.7
10.3
72.4
37.9
6.9
10.3
6.9
3.4
2
469
51.2
26.0
11.9
52.9
35.6
25.6
13.6
2.6
0.0
1
766
61.5
20.6
8.2
35.9
26.2
14.6
3.9
1.3
0.0
Total
1,264
57.4
22.6
9.7
43.0
30.0
18.5
7.7
1.9
0.1
SFD PLOTS KWANGO
G1, G2, G3
0.01
0.05
0.10
0.20
0.50
1.00
2.00
5.00
10.00
15.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
85.00
90.00
95.00
98.00
99.00
99.50
99.80
99.90
99.95
99.99
0.01
0.10
1.00
10.00
100.00
LOWER CRITICAL SIZE (Z)
KWANGO GROUP 1
KWANGO GROUP 2
KWANGO GROUP 3
Fig. 16.17
Size frequency distribution plots for the three Groups of diamonds along the
international
Kwango
'
'
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