15. x-ray mineralogy studies—leg 161 · 2007. 5. 17. · four lithologic units with rather...

15. X-RAY MINERALOGY STUDIES—LEG 161

Ivar Zemmels, University of California, Riverside, California

METHODS

Semiquantiative determinations of mineral composi-tion in bulk samples, 2-20µ and

I. ZEMMELS

The section consists of a brown noncalcareous radi-olarian clay which overlies an interbedded sequence ofalternating clay, calcareous clay, and marl ooze. The marlooze is dominant at the base of the section.

There are very few mineralogical differences betweenthe noncalcareous portions of the several sediment types.Quartz and mica are the predominant lithogenous miner-als throughout the section. Montmorillonite is the mostabundant mineral in the

A short interval of cherty, brown zeolitic clay is charac-terized by a very large concentration of montmorillonite,phillipsite, and clinoptilolite, and a large variety of otherminerals in minor quantities. These are quartz, mica,Plagioclase, barite, palygorskite, and chlorite.

The lowermost lithologic unit is a thick, highly uni-form, mottled nannofossil chalk of Cretaceous age. Chertoccurs intermittently throughout the unit. The uniformityin sediment type is reflected by the uniformity of themineralogy of this unit, which, however, is very unusualfor a pelagic deposit. Quartz is prevalent, as in most ma-rine sediments, but mica occurs in somewhat larger con-centrations than in most pelagic sediments of theequatorial Pacific. Moreover, the mica content does notcorrelate with the quartz content, implying that the micain this unit is not of detrital origin. Plagioclase, which inmost marine sediments occurs in all size grades, is absentfrom the

I. ZEMMELS

TABLE 1 - Continued

CoredInterval

Below SeaCore Floor (m)

Sample Deptha

Below SeaFloor(m) Diff. Amor. Calc. Quar. Cris. K-Fe Plag. Mica Chio. Mont. Clin. Pyri. Ban. Hali.

Hole 155: 2-20µ Fraction - Continued

6

7

8

9

Hole

1

2

3

4

5

6

7

8

9

479-488488-497

497-506

505-515

155:

X-RAY MINERALOGY STUDIES

TABLE 2 - Continued

Core

CoredInterval

Below SeaFloor (m)

Sample Depth3

Below SeaFloor(m) Diff.

Holes 157 and 157A: Bulk Samples -

15

16

17

18

19

21

23

25

27

28

29

30

31

32

333536

39

Holes

1A

2A

1

3A

2

3

4

5

6

7

8

9

10

12

14

15

16

17

18

19

21

23

25

27

28

135-144

144-153

153-162

162-171

171-180

189-198

207-216

225-234

243-252

252-261

261-270

270-279

279-288

288-297

297-306315-324

324-333

345-350

141.04

151.54

160.53

166.53

178.54

195.02

213.02

230.98

246.03

258.03

262.54

277.53

286.52

295.53

304.54316.38

327.03

346.48

66.8

70.7

76.1

70.1

75.0

75.8

65.0

64.2

69.6

64.9

62.9

66.8

65.2

60.0

64.561.9

63.1

59.0

157 and 157A: 2-20µ Fraction

0-9

9-18

10-19

18-27

19-28

28-37

37-46

46-55

55-64

64.73

73-82

82-91

91-99

108-117

126-135

135-144

144-153

153-162

162-171

171-180

189-198

207-216

225-234

243-252

252-261

7.54

10.48

11.55

24.04

23.55

28.05

39.95

49.04

56.46

68.54

73.0275.41

88.9189.54

91.04

114.05

129.04

141.04

151.54

160.53

166.53

178.54

195.02

213.02

230.98

246.03

258.03

94.5

97.6

94.7

95.7

96.6

94.2

99.0

96.5

99.2

96.6

96.297.497.297.0

96.0

95.9

99.2

95.8

97.8

98.6

98.2

97.2

98.0

96.1

95.1

96.3

95.2

Amor. Calc.

Continued

48.1

54.3

62.6

53.3

60.9

52.3

45.3

44.0

52.5

45.2

42.0

48.1

45.7

37.5

44.540.5

42.3

35.9

91.4

96.2

91.7

93.3

94.7

90.9

98.5

94.6

98.7

94.7

94.095.9

95.695.3

93.7

93.6

98.7

93.5

96.6

97.8

97.1

95.6

96.9

93.9

92.4

94.3

92.4

99.5

96.6

99.5

99.7

98.1

99.4

99.5

97.7

99.6

99.5

99.6

99.6

100.0

100.0

100.0100.0

99.7

100.0

Quar.

0.5

1.0

0.5

0.3

0.6

0.6

0.5

0.4

0.4

0.5

0.4

0.4

-

-

-

0.3

-

23.7

18.1

36.1

35.4

36.1

27.8

30.8

30.8

40.3

25.5

27.726.0

28.524.2

21.2

24.2

25.2

17.1

16.8

16.5

19.7

14.9

18.4

30.4

27.9

18.4

19.3

Plag. Kaol.

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

51.0

51.6

50.9

52.5

47.9

40.7

46.5

41.9

51.5

40.5

43.161.8

41.938.0

46.8

38.0

61.5

42.6

36.7

44.8

31.1

25.8

50.5

38.5

36.3

41.7

32.3

Mica

-

2.4

-

-

-

-

-

1.9

-

-

-

-

-

-

-

-

-

15.7

16.4

-

-

13.4

10.3

-

14.9

-

9.5

12.7

11.6

-

-

-

-

24.0-

-

24.5

-

-

-

12.5

Mont. Clin.

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Phil. Paly.

-

-

-

-

-

17.4

16.1

12.4

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Pyri.

3.8

5.4

3.4

6.0

2.6

-

6.5

-

8.2

9.3

3.95.0

11.926.4

16.4

26.4

13.4

33.1

14.6

21.3

25.4

14.6

16.4

17.6

13.7

18.6

17.0

Bari. llnkn.b

-

-

-

-

1.3

-

-

-

-

-

-

-

-

-

-

-

5.9

8.5

9.5

6.1

-

3.9

-

-

-

15.3

12.67.26.0

11.4

15.6

11.4

-

7.2

7.8

17.4

23.8

20.1

14.7

13.6

22.1

21.3

18.8

533

I. ZEMMELS

TABLE 2 - Continued

Core

Holes

29

30

31

3233

35

36

39

Holes

1A

2A

1

3A

2

3

4

5

6

7

8

9

10

12

14

15

16

17

18

19

21

23

25

27

28

29

30

31

32

33

35

39

Cored iInterval

Below SeaFloor (m)

>ample Depth a


157 and 15 7A: 2-20µ Fraction -

261-270

270-279

279-288

288-297297-306

315-324

324-333

345-350

262.54

277.53

286.52

295.53304.54

316.38

327.03

346.48

95.0

98.2

98.6

98.298.3

97.4

96.3

84.1

157 and 157A:


TABLE 3Results of X-Ray Diffraction Analyses from DSDP 158

Core

CoredInterval

Below SeaFloor (m)

Sample Deptha

Below SeaFloor(m)

Hole 158: Bulk Samples

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

2930

32

33

Hole

1

2

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

90-99

99-108

108-117

117-126

126-135

135-144

144-153

153-162

162-171

171-180

180-189

189-198

198-207

207-216

216-225

225-234

234-243

243-252

252-261261-270

279-287

287-296

158: 2-20µ

0-9

9-18

3.04

9.9111.4115.04

15.54

31.53

39.04

49.53

60.03

69.04

74.4179.53

88.53

96.02

105.03

114.02

132.03

130.54

142.53'

151.54

160.52

169.52

178.52

186.03

196.52

204.02

209.41210.02

223.52

225.00

241.53

249.02

255.02268.54

283.53

288.52

Fraction

3.04

9.9111.4115.04

Diff.

80.2

79.179.576.2

74.2

68.3

65.0

62.6

59.3

59.8

61.660.7

60.4

62.5

61.2

57.9

63.6

65.2

61.2

64.3

66.7

58.4

59.4

62.9

64.0

66.2

83.482.2

75.8

74.3

71.9

75.0

79.965.2

65.9

66.9

87.7

87.286.788.5

Amor. Calc.

69.1

67.367.962.8

59.7

50.5

45.3

41.6

36.4

37.2

40.038.6

38.2

41.4

39.4

34.2

43.1

45.6

39.3

44.5

48.0

35.0

36.5

42.0

43.8

47.2

74.172.2

62.1

59.8

56.0

60.9

68.745.6

46.7

48.3

80.7

80.079.282.0

77.4

88.284.385.3

90.3

94.4

98.8

99.3

99.6

99.5

99.399.1

99.5

99.6

99.6

99.6

99.3

99.4

100.0

100.0

100.0

100.0

100.0

100.0

100.0

100.0

96.197.0

98.5

100.0

100.0

96.0

100.0100.0

100.0

98.5

Quar.

5.1

4.74.62.9

2.8

1.7

1.2

0.7

0.4

0.5

0.70.9

0.5

0.4

0.4

0.4

0.7

0.6

-

-

-

-

-

-

-

-

-

-

-

-

0.5

-

-

30.0

30.035.529.8

Plag.

6.5

2.73.76.4

1.7

1.7

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

2.0

-

-

1.5

39.5

36.733.741.2

Kaol. Mica Chio.

1.4

1.3

- -

-

- -

- -

- -

- -

-

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

-

- -

- -

- -

- -

-

- -

-

2.5

7.4 3.15.0 2.13.9 2.7

Mont. Paly.

8.6

3.07.25.4

5.3

2.2

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

16.3

U.514.812.4

Clin. Phü.

0.9

-

-

-

-

-

-

:

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

:

-

-

6.2 -

7.6 -4.2 -4.2 -

Pyri. Bari.

— _

-

-

-

-

-

-

-

- -

-

-

- -

-

-

-

- -

-

-

-

-

- -

-

-

1.2 2.73.0

1.5

-

-

1.5

: :

-

-

— 2 9

1.2 -2.4

b cAmph. Unkn. Unkn. Talc.

1.8 - 0.8

2.4 - - 1.32.5 - - 1.02.9 - - 0.5

535

I. ZEMMELS

TABLE 3 - Continued

Core

Hole

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

32

33

Hole

1

2

3

4

5

6

7

8

9

10

CoredInterval

Below SeaFloor (m)

158: 2-20µ

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

90-99

99-108

108-117

117-126

126-135

135-144

144-153

153-162

162-171

171-180

180-189

189-198

198-207

207-216

216-225

225-234

234-243

243-252

252-261

261-270

279-287

287-296

Sample Deptha


Fraction — Continued

25.54

31.53

39.04

49.53

60.03

69.04

74.4179.53

88.53

96.02

105.03

114.02

123.03

130.54

142.53

151.54

160.52

169.52

178.52

186.03

196.52

204.02

209.41210.02223.52

225.00

241.53

249.02

255.02

268.54

283.53

288.52

158:

TABLE 3 - Continued


Core

CoredInterval

Below SeaFloor (m)

Sample Deρtha

Below SeaFloor(m) Diff. Amor. Calc. Quar. Plag. Kao!. Mica Chio. Mont. Paly. Clin. Phil. Pyri. Bari. Amph. Unkn. Unkn. Talc

Hole 158:

-

-

3.

_

-

4.

-

3.

10.2.1.

0

1

8

177

10.4

3.9

4.3

-

8.1

5.3

8.6

9.6

7.8

5.2

4.0

18.7

4.5 8.8

37.7

7.6 4.2

Meters below sea floor.Relative intensities of peaks are quite variable - 3.80A (broad), 4.41A, and 4.59A.

"Only one peak observed — 14.4A.

TABLE 4Results of X-Ray Diffraction Analyses from DSDp 159

Core

Hole

1

2

3

4

5

6

7

CoredInterval

Below SeaFloor (m)

Sample Deptha

Below SeaFloor(m)

159: Bulk Samples

0-9

9-18

18-27

27-36

36-45

45-54

54-63

4.366.03

10.0116.54

24.0424.13

29.5134.52

43.53

48.0449.01

58.0160.03

Diff.

89.391.0

90.189.5

90.090.8

86.992.0

84.3

77.283.5

81.675.4

Amor.

83.285.9

84.683.6

84.485.6

79.687.5

75.4

64.374.2

71.361.5

Calc.

-

-

5.52.3

69.348.4

70.0

86.677.9

78.688.9

Quar.

30.922.6

20.816.4

14.213.9

3.66.3

2.5

1.62.4

1.50.9

Plag.

15.84.7

22.413.2

25.629.3

9.515.0

8.4

3.22.7

4.81.4

Mica

30.937.9

16.910.2

10.810.5

4.410.6

4.0

3.42.9

2.82.9

Chio. Mont. Paly.

3.2 5.45.6 11.6

18.117.4

4.46.8

4.17.6

4.7

3.5

3.9

Clin.

-

1.96.54.04.8

-

-

2.11.5

1.4

Phil.

9.015.2

15.329.0

30.627.3

5.49.2

8.0

3.26.8

5.33.0

Gyp*. Bari. Hali.

4.92.4

4.67.4

4.85.2

3.72.9

2.3

2.3

3.11.4

537

I. ZEMMELS

TABLE 4 - Continued

Core

8

9

10

12

Hole

1

2

3

4

5

6

7

8

9

10

12

Hole

1

2

3

4

5

6

7

8

9

10

12

CoredInterval

Below SeaFloor (m)

63-72

72-81

81-90

99-107

159: 2-20µ

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

99-107

Sample Deptha

Below SeaFloor(m)

68.5170.5279.53

88.5289.81

105.03106.01

Fraction

4.366.03

10.0116.54

24.0424.13

29.5134.52

43.53

48.0449.01

58.0160.03

68.5170.5279.53

88.5289.81

105.03106.01

159:


TABLE 5Results of X-Ray Diffraction Analyses from DSDP 160

Core

Hole

1

2

3

4

5

6

7

8

9

10

11

12

Hole

1

2

3

4

5

6

7

8

9

10

11

12

Hole

1

2

3

4

5

6

CoredInterval

Below SeaFloor (m)

Sample Depth*Below Sea

Floor(m)

160: Bulk Samples

0-9

9-18

18-27

27-36

36-4.5

45-54

54-63

63-72

72-81

81-90

90-99

99-108

160: 2-20µ

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

90-99

99-108

160:

I. ZEMMELS

TABLE 5 - Continued

Core

Hole

7

8

9

10

11

12

CoredInterval

Below SeaFloor (m)

Sample Deptha


160

TABLE 6 - Continued


CoredInterval


Sample Deptha

Below SeaFloor(m) Diff. Amor. Calc. Quar. K-Fe Plag. Kaol. Mica Mont. Clin. Phil. Ban. Hali. Unkn.

h

Holes 161 and 161A: 2-20µ Fraction

1

2

3

4

5

6

7

1A

9

10

11

12

13

2A

3A

4A

5A

6A

7A

8A

9A

10

11

12

14

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

90-99

99-108

108-117

128-137

137-146

146-155

155-164

164-174

173-182

182-191

191-200

200-209

209-218

218-227

235-244

0.610.911.537.53

15.04

21.03

34.54

40.04

46.46

57.04

70.2170.54

76.54

84.04

97.54

106.54

112.54

135.54

140.04

153.54

162.54

171.54

180.54

185.04185.91

194.04

207.54208.31

213.54

219.34

237.27

90.694.793.996.1

96.4

95.8

95.7

98.2

97.6

98.1

97.290.1

97.3

97.1

97.1

98.1

98.6

96.5

98.7

98.9

97.6

97.1

98.5

98.799.2

98.0

97.297.2

98.0

96.0

96.9

85.3 -91.7 -90.5 -93.9 -

94.3 -

93.5 -

93.3 -

97.2 -

96.3 -

97.0 -

95.6 -84.5 -

95.8 -

95.5 -

95.5 -

97.0 -

97.8 -

94.6 -

97.9 -

98.2 -

96.3 -

95.5 -

97.6 -

97.9 -98.7 -

96.9 -

95.6 -95.7 -

96.8 -

93.7 -

95.2 -

14.015.117.916.2

15.0

17.0

17.9

25.1

20.0

21.1

23.217.2

23.6

18.3

16.8

19.6

17.7

13.2

14.5

9.8

19.4

16.6

16.5

7.222.5

18.3

19.019.8

12.8

12.0

7.5

- 19.617.133.538.2

- 39.9

- 39.8

- 43.0

- 32.4

- 49.7

35.0

- 38.2- 29.5

- 45.1

34.4

- 36.9

- 32.1

18.3 38.4

36.1

- 34.8

- 28.8

- 31.0

- 40.0

- 26.6

25.034.8

41.3

- 43.045.4

- 23.2

35.1

31.9

- 11.1- 12.1- 13.2- 16.3

- 17.4

- 16.3

- 14.5

- 23.2

- 12.6

15.0

- 18.9- 17.3

- 15.5

- 14.5

19.7

- 22.0

- 11.6

- 19.0

- 20.7

- 18.2

17.6

- 20.8

- 21.3

- 12.2

- 16.6

- 12.4

- 17.7

- -

23.818.5

-

-

-

-

-

-

:

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

21.0

29.0

-

-

-

-

-

-

-

1.8

-

-

-

-

-

-

-

-

-

-

-

-

-

_

-

-

15.819.116.212.0

6.7

8.8

9.1

12.5

7.6

15.5

11.619.1

7.0

10.3

8.8

10.4

9.0

11.2

13.6

25.7

9.3

13.4

18.6

23.027.6

6.7

12.820.6

16.7

10.8

17.6

15.718.119.217.2

20.9

18.1

15.4

6.8

10.2

13.4

8.115.2

8.9

22.5

17.7

15.8

4.9

20.5

16.5

17.6

22.7

9.3

17.0

32.615.1

17.1

12.814.2

29.6

21.1

13.9

- Abund

- Pres

— Major

Holes

1

2

3

4

5

6

7

1A

161 and

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

161A:

I. ZEMMELS

TABLE 6 - Continued

Core

Cored Sample Depth'Interval Below Sea

Below Sea p ) o o rFloor (m) ( m )

Holes 161 and 161A

9

10

11

12

13

2A

3A

4A

5A

6A

7A

8A

9A

10

11

12

14

72-81

81-90

90-99

99-108

108-117

128-137

137-146

146-155

155-164

164-173

173-182

182-191

191-200

200-209

209-218

218-227

235-244

Diff.

:


TABLE 7 - Continued

Core

Hole

14

15

16

17

Hole

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

Hole

1

2

3

4

5

6

7

8

9

10

CoredInterval

Below SeaFloor (m)

Sample DepüBelow Sea

Floor(m>

162: Bulk Samples -

117-126

126-135

135-144

144-153

162: 2-20µ

0-9

9-18

18-27

27-36

36-45

45-54

54-63

63-72

72-81

81-90

90-99

99-108

108-117

117-126

126-135

135-144

144-153

162:

I. ZEMMELS

TABLE 7 - Continued

CoredInterval


Sample Depth3

Below SeaFloor(m) Diff. Amor. Calc. Quai. Plag. Kaol. Mica Chio. Mont. Clin. Phil. Gyps. Bari. Hali. Goet. Unkn."

Hole 162:


TABLE 8 - Continued

Core

Holes

20

21

22

23

26

27

Holes

2

3

4

6

7

10

11

1A

15

16

17

18

19

20

21

22

23

27

CoredInterval

Below SeaFloor (m)

Sample Deptha


163 and 163A: Bulk Samples -

207-216

216-225

225-234

234-243

261-270

270-276

209.51211.54215.51

218.51220.54224.51

227.61231.03232.89

236.51239.51241.54

263.51

271.19

62.663.160.7

60.662.061.4

63.058.457.7

57.560.773.2

54.0

58.2

163 and 163A: 2-20µ Fraction

1-10

10-19

19-28

37-46

46-55

73-82

82-91

140-146

162-171

171-180

180-189

189-198

198-207

207-216

216-225

225-234

234-243

270-276

5.015.54

10.5914.54

25.04

44.54

47.54

77.46

89.0189.54

142.95144.01144.54145.51

162.36

173.51177.04179.61

184.01187.01187.54

190.01193.01196.52

199.01202.01204.04

209.51211.54215.51220.54224.51

227.61231.03

236.51239.51241.54

271.19

89.492.2

95.195.7

96.5

82.9

99.7

99.7

99.799.8

72.972.876.373.8

73.9

76.277.977.3

79.480.381.8

77.280.183.0

80.278.176.6

76.175.674.180.073.6

78.178.8

78.175.679.7

75.4

Amor. Calc.

Continued

41.642.438.7

38.540.639.7

42.234.933.9

33.638.658.1

28.1

34.6

83.487.8

92.393.2

94.5

73.2

99.6

99.6

99.699.7

57.657.562.959.0

59.2

62.865.564.6

67.869.271.6

64.468.973.5

69.165.863.5

62.761.859.668.858.7

65.866.9

65.861.868.2

61.6

90.695.295.7

84.699.594.1

97.394.699.5

95.295.375.0

99.5

98.1

-

-

-

-

-

-

:

-

-

-

:

-

—

-

Quar.

1.40.81.2

15.40.51.4

1.10.70.5

1.71.42.7

0.5

0.9

11.310.8

14.916.8

15.8

11.4

21.3

40.9

100.0

9.66.17.05.6

29.5

32.634.731.0

31.231.327.9

31.732.526.9

31.930.033.2

35.533.935.328.636.2

30.430.0

28.329.832.0

23.9

K-Fe

-

:

:

-

-

-

-

-

-

-

-

12.0

11.513.0

6.6

8.911.49.5

8.46.37.4

5.76.2

11.6

5.88.96.38.46.3

2.98.0

4.93.07.3

7.1

Plag.

-

-

-

—

-

-

24.326.4

19.124.1

34.1

39.4

51.5

-

-

5.8

10.1

10.2

7.08.79.1

9.17.57.6

8.28.57.3

8.99.39.8

9.29.19.97.09.8

9.07.0

8.59.08.0

5.7

Mica Chio.

3.2 -1.4 -1.2 -

2.0 -

1.6 -2.0 -

2.1 -1.6 -6.5 -

- -

-

6.79.1

11.512.4

10.3

15.4

- -

- -

-

3.6 I

12.2

15.811.124.6

24.324.521.8

22.025.425.5

23.422.519.6

14.716.117.918.316.4

18.917.2

17.915.917.6

25.7

Mont. Paly.

4.82.61.9

2.5

1.6

12.9

-

-

5.7 -8.1 -

8.8 -

19.5 -

_ _

-

- -

-

6.3 -

6.3

7.57.9

- 11.2

7.07.5

13.9

7.99.2

13.2

7.16.97.6

6.88.76.6

14.74.9

6.99.9

6.76.59.9

- -

Clin.

-

-

1.1

1.11.82.9

-

1.0

-

-

-

30.2

-

-

:

52.731.440.831.2

29.8

25.624.717.5

19.517.919.3

21.818.119.8

23.125.018.2

28.023.324.023.026.2

31.927.9

33.835.825.3

37.6

Phil. Pyri.

-

-

: =

-

-

52.0 -45.7 -

45.6 -46.8 -

20.4 -

-

-

- -

_ _

31.9 -59.0 -52.2 -46.7 -

- -

— —

-

-

—

-

—

Bari.

-

-

-

:

-

-

-

-

-

3.6

26.2

59.1

:

-

-

-

-

;

:

-

—

-

—

545

I. ZEMMELS

TABLE 8 - Continued

Core

Holes

2

3

4

6

7

10

11

1A

15

16

17

18

19

20

21

22

23

26

27

Cored Sample Deptha

Interval Below SeaBelow Sea FloorFloor (m) ( m )

163 and 163A

1-10

10-19

19-28

37-46

46-55

73-82

82-91

140-146

162-171

171-180

180-189

189-198

198-207

207-216

216-225

225-234

234-243

261-270

270-276

Diff.

:


Hole

157

157A

158

Core

8

912345678

9

101214151617181921232527282930313233353639

123

12

3456789

101112131415161718192021222324

TABLE 9

Section

2CCcc24123141256153566465543526666131

615

3125643455266555546666656523

— Continued

Depth inSection

(cm)

106-108_-

0-100-100-10

140-1500-9

142-1500-90-3

90-9290-92

0-80-90-100-80-90-90-60-60-80-50-5

145-1500-60-60-70-60-50-60-8

135-1400-6

145-1500-8

145-1500-9

0-990-9290-92

0-80-80-60-70-60-90-8

90-920-60-60-5

0-50-50-60-80-60-80-50-50-50-60-50-3

90-920-5

Depth BelowSea Floor

(m)

499.57506.00515.00

11.5523.5528.0539.9549.0456.4668.5473.0275.4188.9189.5491.04

114.05129.04141.04151.54160.53166.53178.54195.02213.02230.98246.03258.03262.54277.53286.52295.53304.54316.38327.03346.48

7.5410.4824.04

3.049.91

11.4115.0425.5431.5339.0449.5360.0369.0474.4179.5388.5396.02

105.03114.02123.03130.54142.53151.54160.52169.52178.52186.03196.52204.02209.41210.02

Hole

159

160

161

161

161A

Core

2526272829303233

1

2

3

4

56

7

8

910

12

1

2

3

456789

1011

12

1

2345679

10111213

1

2345

TABLE 9 -

Section

60653642

35165526633354666655

12141665656246666

112653631343664

566366

• Continued

Depth inSection(cm)

0-520-25

0-60-30-40-70-60-5

135-1370-4

100-1020-90-8

12-14100-102

0-50-60-9

100-102100-102

0-6100-102

0-50-6

130-1320-60-6

100-10239-41

0-960-62

0-960-62

0-960-62

0-90-80-90-60-70-60-50-6

60-620-6

60-6290-92

0-60-60-90-60-80-7

143-1500-80-80-80-80-80-8

120-1220-80-80-90-80-8


(m)

223.52225.00241.53249.02255.02268.54283.53288.52

4.366.03

10.0116.5424.0424.1329.5134.5243.5348.0449.0158.0160.0368.5170.5279.5388.5289.81

105.03106.01

0.401.549.61

13.5418.6125.5426.1133.0443.5451.0461.5364.5476.5488.5297.5698.11

106.53

0.610.911.537.53

15.0421.0334.5440.0446.4657.0476.5484.0497.54

106.54112.5470.2170.54

135.54140.04153.54162.54

547

I. ZEMMELS

TABLE 6 - Continued TABLE 6 - Continued

Hole

162

163

Core

678

910

111214

1

2345

67

89

1011121314

15

1617

2

3

Section

6633366412

1466642643666455666462134

3

414

Depth inSection

(cm)

0-80-8

90-920-80-80-8

80-820-7

133-13576-7880-8250-52

0-80-90-90-6

90-920-80-80-8

90-920-80-80-80-60-80-80-8

90-9290-92

0-80-6

53-550-6

139-141

100-1020-9

58-600-9


(m)

171.54180.54185.04185.91194.04207.54208.31213.54219.34237.27

0.815.417.54

16.5425.5431.5338.4143.5449.5457.9161.5470.5479.5485.5496.03

105.04115.54124.54125.41131.41133.54136.53144.54147.03149.90

5.015.54

10.5914.54

Hole

163A

Core

467

1011

15

16

17

18

19

20

21

22

23

2627

1

Section

5623561625635613613524624625624621

2344

Depth inSection

(cm)

0-90-70-9

141-150100-102

0-935-36

147-1480-9

100-102110-112100-102100-102

0-8100-102100-102

0-5100-102100-102

0-8100-102

0-9100-102100-102

0-8100-102110-112

0-638-40

100-102100-102

0-7110-112118-120

144-146100-102

0-8100-102


(m)

25.0444.5447.5477.4689.0189.54

162.36170.98173.51177.04179.61184.01187.01187.54190.01193.01196.52199.01202.01204.04209.51211.54215.51218.51220.54224.51227.61231.03232.89236.51239.51241.54263.51271.19

142.95144.01144.54145.51

548


CORE

NO.

1

2

3

4

5

6

7

8

9

DEPTH(m)

434 *

443

452

461 1

470

479

488

497

515

AGE

Mid

dle

M

ioce

ne

LITHOLOGY

Inte

rbedded

na

nno

ma

rl,

cla

ysto

ne

an

d m

arl

y c

lay

.N

anno

fo

ram

ch

alk

333

33

33 2

1

12

1*

AMORPHOUSSCATTERING

100%

CALC. MONT.

100?

-

_

QUAR. CRIS.

50%

-

K-FE. PLAG. CLIN.

25%

-

Ml

.1

M

MICA. CHLO. PYRI . BARI . HAL I .

10%

-

-

-

*See text of Site 155 for sediment description

Figure 1. DSDP 155 bulk samples.

549

I. ZEMMELS


Figure 2. DSDP 155-2-20µ fractions.

550


CORE

NO. (m)

AMORPHOUSSCATTERING QUAR. CRIS. K-FE. PL AG. MICA

CLIN. PYRI. BARI

434-

461-

470-

479-

497-

506-

515-


Figure 3. DSDP 155

I. ZEMMELS


552

OUΛR. I P>•RI. MICA I C L H .

Figure 5. DSDP 1572-20µ fractions.


m

2A

1

3A

3

5

6

β

9

, 0

12

14

15

16

, 7

19

23

25

21

28

29

30

31

32

33

35

3 ,

DEPTH

-

18

B-

37

55

64

73

82

99108=3

135

144

153

162

1 7 1 —

li=l

2?!=•

S S = l

234 ,2 4 3 ^ "

252

261

279

288

297

3 0 6 — .

345= ]

1

...

a

2

-

1•

1

Url

I2

i

5

100*. oo•-

)

501

_

251

Figure 6. DSDP157

I. ZEMMELS

CORE

NO.

1

2

3

5

7

8

9

11

1 !

13

14

16

17

18

19

20

21

22

23

24

25

2 ;

28

29

30

3J

DEPTH

l>)

9

18

27

54

63

90

99

108

117

126

144

153

162

180

189

198

207

216

234

252

261

AGE

I

j

J

1

-

I

LITHOLOGY

i|

181

1

1

11

1I

i

J

1

1

1

f

s

1j

I

1!

I

SCATTERING

100J

—

CALC.

10CU

OUAR. PLAG. KAOL. CHLO. «0»T. CLIN. P m . BAM.

, 0 .

-


554


mFigure 8. DSDP 158 2-20µ fractions.

555

I. ZEMMELS

CORE

U0.

•

5

8

9

,0

12

13

14

1 5

16

"


CORE

NO.

1

2

3

4

5

6

7

8

9

10

12

DEPTH(m)

9

27

36

45

54

63

72

81

90 .99 '

107 1

AGE

tern

ary

CD-

La

teM

ioce

neM

idd

leM

ioce

ne

0)

Ea

rly

Mio

ce

o~

51—

LITHOLOGY

cla

y

own

ria

n

ßr

rad

io!c

ooze

ma

rlus

cla

y and

1 ca

reo

I0

u

itin

g c

lay,

Al t

ern

ooze

mar

lN

an

no

pla

nkt

on

AMORPHOUSSCATTERING

100%

CALC.

100%

•

QUAR. PLAG. MICA PHIL.

50%

-

•

—

•

•

MONT.

25%

m

CHLO. CLIN. BARI.

10%

-

-

_

-


557

I. ZEMMELS

Figure 11. DSDP 159 2-20µ fractions.

558


NO.

2

3

4

5

6

7

8

9

10

12

CORE

DEPTH(m)

9

27

36

45

54 :

63

72

81

90—.99-—'

107

AGE

rnary

Si

La

te

Mio

cene

ene

e M

ioc

Mid

den

e

o

Ea

rly M

.ate

J

ocen

e(?)

J

LITHOLOGY

-ow

n

ria

n

B

rad

iola

oo

ze.

d m

arl

oo

zea

nkt

on

ma

r'N

anno

pl

AMORPHOUSSCATTERING

100%

MONT.

100%

MICA PHIL.

507,

QUAR. PLAG. PALY. GYPS.

25%

-

CHLO. CLIN. BARI. HAL I.

10%

Figure 12. DSDP159

I. ZEMMELS


560


NO.

1

2

3

4

5

6

7

8

9

10

11

12

CORE

DEPTH(m)

9

18

45

54

63

72

81

90

99

108 '

AGE

to-

[ Pl

eis

1 ce

ne

?

Earl

y Mi

ocen

e01

igoc

ene

LITHOLOGY

clay

brown

o

Zeoli t

< ooze

.c

Nann

opla

nkto

n

AMORPHOUSSCATTERING

100%

PLAG. MONT. PHIL.

50%

-

QUAR. MICA CLIN. BARI.

25%

PYRI.

10%

Figure 14. DSDP160 2-20µ fractions.

561

I. ZEMMELS

CORE

NO.

1

2

3

4

5

6

7

8

g

10

11

12

DEPTH(m)

9

18

27

36

45

54

63

72

81

90

ma—

AGE

j P

leis

toce

ne" o

cene

Ea

rly

MO

ligoc

ene

LITHOLOGY

Bc

liti

c,

brow

Zeo

X-RAY MINERALOGY STUDIF'

CORE

NO.

1

2

3

4

6

7

1A

9

10

11

12

2A

3A

4A

5A

6A

7A

8A

9A

1OA

TIA

12A

14A

DEPTH

(m)

9

18

36

45

54

63

72

81

9 0 —

99

108

117 1128 '

137

146

l r r

164

173

182

191

209

218

2 2 7 — ,2 3 5 — '

244

AGE

Mio

ce

ne

Ea

rly

c

I

ate

0

__.

Ea

rlL

ate

E

oc

en

e

—

Mid

dl

Eo

cen<

LITHOLOGY

;j "

azoo *

ton

cha

an

kno

plM

ixe

d n

an

g

E

c

Jj

I

chal

k

Q

πo

pla

π

Φ

ola

rite

T3

I

AMORPHOUSSCATTERING

100%

CALC.

100$

MONT.

5 0 *

QUAR. PLAG. MICA

25%

P H I L . BARI.

Figure 16. DSDP 161 bulk samples. 563

I. ZEMMELS

CORE

NO.

2

3

4

6

7

1A

10

11

12

2A

3A

4A

5A

6A

7A

8A

9A

10A

11A

12A

14A

DEPTH(m)

9

18

36

54

63

72—

81

90

99

108

117128

137

146

164

174

182

191

209

218

227 .235 '

AGE

I

ate

01i

___

1

5

3

La

te

Eo

cen

e

—

Mid

dl

LITHOLOGY

ino

us

r

E |

"" ë"

•σ

0 11

pla

nk

ton

ch

a

i

ai

1

cto

n

i

a

*

a•

rad

io

1

AMORPHOUS

SCATTERING

100*

QUAR. PLAG. MONT.

50%

P H I L .

-

BAR I . K-FE. MICA

25*

CLIN,

10%


564


CORE

NO.

1

2

3

4

6

7

1A

9

10

11

12

2A

3A

4A

5A

6A

7A

8A

9A

10A

12A

14A

DEPTH

(n)

9 —

18

36

5 4 —

63

72

81

90—

99

108

117 .128—'

137

146

164

173

182

191

209

218

2 2 7 — .2 3 5 — '

244

AGE

jjs:

Ea

rlj

£

5

La

te

. _ .

go

ce

ne

o

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rlo

ce

ne

La

te E

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Mid

dl

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ce

n

LITHOLOGY

r

i 1

i s

e

Σ

s

ch

al

J

c

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it

--s

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2

i

a

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1

AMORPHOUSSCATTERING

100*

MONT.

100%

QUAR. PLAG. MICA PHIL.

25«

K-FE. KAOL. BARI. HAL I .

10%

Figure 18. DSDP 161

I. ZEMMELS

CORE

NO

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

DEPTH

(m)

α

18

27 ..

36

45

54

63•

72

81

90

99

108

117

126

135

144

153

CU

y O

lig

oc

Ea

rl


CORE

NO.DEPTH

(m)

AGE LITHOLOGY

AMORPHOUSSCATTERING

PLAG. MONT. CLIN.

100%

MICA P H I L . QUAR. CHLO. BAR I .

10%

10

12

13

15

16

17

18-

27-

36-

45-

54-

63-

72-

90-

99-

108-

117-

126-

135-

144-

153-

5 o



567

I. ZEMMELS

CORE

NO. DEPTH(m)

AGE LITHOLOGY

AMORPHOUSSCATTERING

100%

MONT. PLAG. PHIL . HALI . QUAR. MICA KAOL. CLIN. GYPS.

100% sot l


CORE

NO. DEPTH(

I. ZEMMELS

Figure 23. DSDP 163 2-20µ fractions.

570


LITHOLOGY

AMORPHOUSSCATTERING QUAR.

9 1 -140-

146-162-

•W" •M E >>

243-261"

Figure 24. Site 163

15. x-ray mineralogy studies—leg 161 · 2007. 5. 17. · four lithologic units with rather...

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