Core #

Mineralized Zones

Footage

Rock Type

Plagio- clase

Olivine

Ortho-   pyroxene

Clino- pyroxene

Biotite

Apatite

Opaques

Sericite

Serp- entine

Amphi- bole

Other Minerals

1

42.0

Troctolite

60.8

33.6

1.0

0.2

2.2

2.3

2

58.0

do

37.9

41.1

0.6

0.5

0.8

1.0

15.0

0.3

2.7

3

64.0

Anorthosite

89.2

4.2

0.2

0.1

0.4

4.0

2.0

4

70.0

Troctolite

55.0

34.7

1.6

0.8

8.0

5

76.6

Anorthositic-troctolite

70.9

25.2

2.9

0.5

0.2

0.3

6

90.6

Troctolitic-anorthosite

75.2

8.9

4.4

0.8

0.4

10.3

7

99, 106

99.3

Gabbro pegmatite

63.6

25.2

1.2

0.7

3.4

3.7

2.3

8

112, 119

119.5

Troctolite pegmatite

81.2

14.0

2.0

0.6

0.6

1.1

0.6

9

122.4

Troctolite

65.8

29.8

0.4

0.4

3.5

0.1

10

132.2

Anorthositic-troctolite

70.0

26.6

1.9

0.6

0.6

0.3

11

153

152.9

Anorthosite

95.1

1.7

0.2

0.1

0.2

2.7

12

155.3

Anorthositic-troctolite

72.4

26.9

0.2

0.3

0.1

0.1

13

170

170.6

Gabbro pegmatite

39.3

47.7

3.4

0.7

5.8

3.1

14

178.1

Anorthositic-troctolite

72.8

23.0

1.8

0.5

1.9

15

203.0

Anorthosite

90.0

1.6

2.6

0.1

0.8

5.0

16

214

209.3

Troctolitic-anorthosite

84.4

14.5

0.3

0.1

0.7

17

287.0

do

70.5

9.7

0.4

0.1

12.8

6.6

18

313.9

do

84.3

10.5

0.6

0.1

0.1

4.2

0.4

19

331

331.6

Gabbro pegmatite

42.7

39.6

1.5

0.6

4.6

6.4

4.7

20a

351.6

Anorthosite

92.3

0.2

0.4

0.3

0.3

6.5

20b

351.9

Anorthositic-troctolite

72.2

25.8

1.6

0.4

0.1

21a

373.5

Picrite

37.8

34.5

0.5

0.9

0.5

5.9

3.2

16.6

21b

374.0

Troctolite

58.3

36.0

2.5

0.3

0.1

0.9

1.9

22

431.6

Anorthosite

87.8

0.3

6.9

5.0

23

544.4

Anorthositic-troctolite

74.9

20.3

4.2

0.1

0.5

24a

574.0

Troctolite

66.3

31.9

1.1

0.1

0.6

24b

574.3

Anorthosite

81.1

0.1

1.9

0.1

12.3

4.5

25

579.0

Gabbro pegmatite

31.2

19.4

0.2

34.6

11.3

3.4

26

590.1

Picrite

23.8

63.9

8..8

0.2

2.2

1.1

27

620.7

Anorthositic-troctolite

72.9

25.7

0.8

0.2

0.5

28

648.4

Magnetite hornfels

27.4

17.0

0.8

53.0

1.9

29

691.4

Hornfels (banded sediment)

46.6

13.9

39.2

0.1

0.3

30

699.0

Hornfels

51.9

6.9

40.6

0.7

31

770.6

Anorthositic-troctolite

74.2

23.6

1.9

0.1

0.2

32

845.5

Picrite

34.4

59.1

3.3

0.4

1.6

1.3

33

867.8

Troctolite

57.5

36.5

1.6

0.7

3.0

0.2

0.7

34

923.9

Picrite peglnatite

24.5

48.3

8.3

1.4

17.1

0.4

35

983.2

Anorthositic-troctolite

76.4

14.4

8.1

0.2

0.9

36

1015

1029.2

Granite pegmatite

2.1

2.4

1.0

¹65.4   ²29.1 ³4.1

37

1046.0

Troctolite

65.5

22.3

1.4

0.2

0.6

5.8

38

1121.0

Anorthositic-troctolite

73.8

22.4

2.4

0.3

0.5

0.1

0.5

39

1249.8

Troctolite

61.5

28.3

9.9

0.3

40

1358.4

Troctolitic-anorthosite

91.6

6.7

0.2

1.4

41

1369

1387.4

Troctolite

41.1

44.3

1.7

2.7

1.0

9.0

0.2

42

l425 to

1427.3

Picrite

44.5

53.9

0.5

0.1

1.0

43

|

1443.3

Wehrlite

6.1

39.6

6.0

35.7

4.6

7.6

0.3

44

|

1462.4

Olivine gabbro

67.7

10.2

20.8

0.1

0.9

0.1

0.2

45

1470

1555.7

Altered troctolite

45.0

0.7

0.8

0.8

0.4

24.4

0.7

27.2

46

1581.3

do

47.2

0.3

0.2

1.6

27.5

12.9

10.3

47

1664.2

do

35.3

0.1

2.4

1.0

0.3

26.9

0.3

31.2

⁴2.7

48

1741-1771

1787.2

Troctolitic-anorthosite

81.5

15.9

1.2

0.9

0.1

0.4

49

1829-1833

1831.4

Gabbro pegmatite

52.7

0.5

20.3

15.6

1.7

4.3

¹5.9

50

1856, 1878

1846.9

Anorthositic-troctolite

74.0

16.5

4.7

1.0

1.9

1.0

0.9

51

1903.0

Hornfels

48.2

8.6

33.2

0.9

1.9

7.2

52

1954 to

1948.0

Anorthositic-troctolite

70.4

14.8

9.7

0.6

1.4

2.5

0.7

53

|

1962.9

do

69.6

18.8

6.5

0.6

0.5

3.2

0.8

54

|

1986.9

Picrite

34.9

46.7

0.7

0.7

8.9

8.3

55

|

1993.0

do

26.1

38.3

7.5

0.1

12.1

15.9

56

|

2018.8

Anorthositic-troctolite

72.0

18.4

6.8

1.1

1.3

0.5

57

2021

2047.6

do

70.7

21.9

3.2

1.3

1.3

1.3

0.3

58

2113.2

Hornfels

75.8

20.4

0.6

1.1

2.1

59

2119-2136

2271.7

Troctolite

43.9

29.2

2.3

0.3

0.1

1.5

16.8

5.9

60

2320.9

do

58.1

25.2

9.1

0.9

1.9

3.6

1.3

61

2333.2

Porphyritic basalt hornfels

68.2

25.4

0.7

5.6

62

2404

2491.8

Pyroxene troctolite

53.3

33.7

9.8

2.4

0.1

0.7

63

2515 to

2520.0

Anorthositic-troctolite

64.8

20.5

4.3

1.8

1.2

6.1

1.3

64

|

2523.9

do

69.4

5.2

2.1

0.4

0.1

22.6

0.1

65

|

2531.9

Troctolite

48.4

35.9

5.2

6.6

4.0

66

|

2554.0

do

61.6

26.6

1.9

1.7

8.2

0.1

67

|

2569.3

Picrite

45.7

39.6

8.4

1.6

0.1

4.0

0.7

68

|

2575.0

Pyroxene troctolite

55.6

19.2

11.5

2.4

0.4

8.4

2.6

69

|

2583.2

do

56.2

21.9

9.6

3.4

8.2

0.7

70

|

2600.6

Anorthosite troctolite

73.3

13.0

7.4

1.4

0.9

3.1

0.8

71

|

2639.5

Pyroxene troctolite

51.9

25.7

12.3

3.2

7.0

72

|

2652.0

Troctolite

63.5

27.7

4.3

3.5

0.1

0.6

0.3

73

|

2696.8

Gabbro pegmatite

42.2

2.3

35.1

2.5

17.5

0.1

0.3

74

|

2725.3

Troctolite

27.2

18.5

2.1

1.0

50.7

0.5

75

|

2728.8

Hornfels

63.6

16.8

7.1

8.5

3.9

76

|

2800.6

do

10.3

65.4

2.2

3.9

11.5

5.4

1.0

¹0.4

77

|

2807.6

do

47.0

8.9

37.8

0.7

0.5

4.7

0.5

78

2830

2816.8

do

79

2845.9

do

80

2854.8

Virginia Formation

81

2889.0

do

82

2924.6

Biwabik Iron Formation