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1112454431459 4 8 0 8 3865
4
3
3
6
7
7
3
1
0
1
4
4
10
20
28
30
30
23
13
12
11
9 7 7 4 6 2 5 1 1 2 4 5 2 5 4 8 0 1 6 6 5
12
10
13
23
24
16
8
4
2
3
5
6
14
28
37
43
45
32
17
17
15
13
13
17
26
27
7
9
5 4 5 7 8 5 5 5 4 2 7 7 3 1
10
15
18
22
24
14
7
5
5
8
10
11
15
19
28
36
29
18
13
8
5
10
17
17
18
18
9
4
4
7
11
15
15
15
14
17
27
13
8
7
3
2
17
23
17
16
12
5
2
4
7
13
19
17
14
10
8
7
3
3
2
1
1
2 3 0 472026 4 98 472135223
42
39
22
11
42015 4 7 7 341389458
b
10,600
124
62
138
32
259
114
11
49
94
1
93
46
31
10,200
99
213
125
196
25
47
169
14,200 E
14,600 E
15,000 E
c
300
200
100
14,200 E
14,600 E
14,000 E
Fig. 7.31 Harmonic analysis of irregularly spaced data (After Agterberg
1969
). Intersection
points of 20 exploratory bore-holes from topographic surface with ore-zone shown in b.
Two-dimensional sine-waves were fitted to 20 values by least squares method; percentage
explained sum of squares for each fitted wave is shown in a with period scale in feet. Wave for
value 44 on peak in a is shown by straight-line contours in b, and also in cross-section for
horizontal line (V
ΒΌ
10,600) near topographic surface in c (Source: Agterberg
1974
, Fig. 78)
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