Table 3.

Table T3. Results of X-ray diffraction analysis of bulk fine-grained sediments, Site 1109 thin sections.

Core, section,
interval (cm) Description XRD identification: major (minor) minerals

180-1109C-

1H-1, 131-132
Silty clay
Calcite (quartz, plagioclase)

1H-4, 64.5-67
Calcareous silt
Calcite (quartz, plagioclase)

2H-4, 129-130
Calcareous clay
Calcite (aragonite)

3H-2, 87-88
Calcareous clay
Calcite (Mg-Calcite?)

4H-2, 105-106
Calcareous silty clay
Calcite (quartz, plagioclase)

5H-6, 58-59
Clay
Calcite (quartz, plagioclase)

6H-7, 5.5-6.6
Clayey silt
Calcite (quartz, plagioclase)

7H-5, 89-90
Clayey silt
Calcite (quartz, plagioclase)

10H-2, 42-43
Very fine sand to silt
Plagioclase, quartz, C/S? (chlorite, augite, amphibole, pyrite?)

11H-2, 104-105
Silty sand
Calcite, quartz, plagioclase, augite, C/S? (chlorite, amphibole)

12X-7, 25-26
Clay
C/S?, chlorite, quartz, plagioclase, calcite, augite (illite, amphibole)

13X-6, 117-118
Clay
C/S?, calcite, quartz, plagioclase, augite, chlorite (illite, amphibole)

14X-6, 142-143
Silty clay
Calcite, quartz, plagioclase, C/S? (chlorite, augite, amphibole, illite)

15X-6, 58-59
Clayey silt
Calcite, quartz, plagioclase, C/S? (chlorite, augite, amphibole, illite)

16X-3, 77-78
Sandy silt
Quartz, calcite, plagioclase, C/S? (chlorite, illite, augite, amphibole)

18X-4, 88-89
Sandy silt
C/S?, calcite, plagioclase, quartz, K-feldspar, augite (illite, amphibole)

19X-1, 120.5-121.5
Silty clay
Quartz, plagioclase, calcite, C/S? (illite, augite, amphibole)

20X-4, 88-89
Sandy silty clay
Calcite, plagioclase, quartz (C/S?, chlorite, augite, amphibole)

21X-CC-25-26
Clayey silt
Plagioclase, quartz, calcite (augite, C/S?, chlorite)

22X-1, 29.5-31
Fine sand
Plagioclase, calcite, quartz, C/S? (amphibole, augite, chlorite, illite)

23X-3, 32-33
Clayey silt
Calcite (plagioclase, quartz, C/S?, chlorite, amphibole, augite)

24X-CC, 11-12
Sand
Plagioclase, quartz, augite (amphibole, C/S?)

26X-3, 25-26
Clayey silt
Calcite, plagioclase, quartz (augite, C/S?, chlorite, sudoite?, amphibole)

27X-5, 115-116
Silty clay
Calcite (plagioclase, quartz, illite)

28X-4, 34-35
Clayey silt
Calcite, plagioclase (quartz, illite)

29X-3, 5-6
Sandy silt
Calcite (plagioclase, quartz)

29X-3, 39-40
Silty sand
Calcite, plagioclase (quartz)

30X-2, 33-34
Silty clay
Calcite, plagioclase (quartz, augite)

31X-3, 17-18
Sandy silt
Plagioclase, calcite, quartz, augite (chlorite, illite, amphibole)

32X-3, 107-108
Sandy silty clay
Calcite, quartz, plagioclase (chlorite, augite)

33X-6, 115-116
Sandy silty clay
Calcite, plagioclase, quartz (augite, chlorite, illite, I/V?, I/S?)

34X-2, 87-88
Clayey silt
Calcite, plagioclase, quartz (illite, augite, smectite?)

35X-6, 64.5-65
Silty clay
Calcite (quartz, plagioclase)

37X-2, 43.5-44.5
Calcareous clay
Calcite (quartz, plagioclase, smectite?))

38X-3, 53-54
Clayey silt
Calcite, plagioclase (quartz, illite, amphibole, chlorite, smectite?)

39X-6, 78-79
Silty clay
Plagioclase, cristobalite, calcite, amphibole (quartz, illite)

40X-4, 45.5-47
Silty clay
Calcite, K-feldspar, plagioclase, quartz (illite, amphibole, augite)

41X-2, 32-33
Sandy silty clay
Calcite, plagioclase, quartz (smectite?, illite, amphibole)

180-1109D-

2R-3, 39.5-42.5
Silty sandy claystone
Calcite, plagioclase, quartz (illite, chlorite, smectite?)

3R-6, 83-85
Clayey siltstone
Calcite, plagioclase, quartz (illite, amphibole, smectite?)

4R-4, 69-71
Clayey siltstone
Calcite, plagioclase, quartz (chlorite, smectite?, illite, amphibole)

5R-1, 60-61
Sandy silty claystone
Calcite, K-feldspar, plagioclase, quartz (chlorite, smectite?, illite)

6R-1, 39.5-41.5
Clayey siltstone
Calcite, plagioclase, quartz (chlorite, smectite?, illite, amphibole)

7R-3, 15-17
Calcareous claystone
Calcite, plagioclase, quartz (illite)

9R-3, 100-101
Clayey siltstone
Calcite, plagioclase, quartz (illite)

10R-1, 22.5-26
Clayey siltstone
Calcite, plagioclase, quartz (illite)

11R-3, 58-59
Silty claystone
Calcite, plagioclase, quartz (illite, amphibole)

12R-7, 10-11
Silty claystone
Calcite, plagioclase, quartz (illite, amphibole)

13R-3, 13.5-15.5
Siltstone
Calcite, plagioclase, quartz (illite, amphibole)

14R-2, 20-22
Silty claystone
Calcite, plagioclase, quartz (illite, amphibole)

15R-1, 81-82
Silty claystone
Calcite, plagioclase, quartz (illite, amphibole)

16R-1, 83-84
Silty sandstone
Calcite, quartz, plagioclase, aragonite, illite, amphibole (chlorite)

17R-3, 74-76.5
Siltstone
Calcite, plagioclase, quartz, amphibole, illite

18R-2, 12-14
Calcareous silty claystone
Calcite, plagioclase, quartz, illite (amphibole)

19R-2, 19-21
Calcareous clayey siltstone
Calcite, quartz (plagioclase, illite)

20R-4, 36-37
Calcareous silty claystone
Calcite, plagioclase, quartz (illite, augite)

21R-4, 66-68
Calcareous silty claystone
Calcite, plagioclase, quartz (illite, amphibole)

22R-1, 62-63
Claystone
Plagioclase, illite (mica)

22R-3, 59-60.5
Calcareous sandy siltstone
Calcite, quartz, plagioclase (illite, chlorite, amphibole)

23R-2, 33-34
Calcareous silty claystone
Calcite, plagioclase, quartz (illite)

24R-3, 70-71
Sandy siltstone
Plagioclase, calcite, quartz (illite)

25R-4, 78.5-79.5
Calcareous sandstone
Calcite, hornblende, quartz, plagioclase (illite)

26R-2, 36-38
Calcareous silty sandstone
Calcite, quartz, plagioclase (illite)

27R-1, 58-59
Packstone-grainstone
Calcite, aragonite, plagioclase (quartz, illite)

28R-1, 84-87
Packstone-grainstone
Calcite, plagioclase (quartz, amphibole, illite)

29R-1, 47-49
Packstone-grainstone
Plagioclase, calcite, quartz (illite, amphibole)

30R-1, 47-49
Packstone
Plagioclase, calcite, mica/illite, amphibole

31R-1, 77-79
Packstone-grainstone
Plagioclase, calcite, amphibole, quartz, illite

32R-2, 62-63
Packstone
Calcite (plagioclase)

35R-2, 103-103.5
Silty clay
Calcite, pyroxene, plagioclase, quartz (chlorite, illite)

35R-8, 55.5-57.5
Clayey siltstone
Calcite, plagioclase, quartz (pyroxene, amphibole, illite)

36R-6, 34-35
Calcareous clayey siltstone
Pyroxene, calcite, plagioclase (smectite?, illite)

37R-2, 97-98
Sandy siltstone
Plagioclase, quartz (illite, amphibole)

38R-6, 17-17.5
Sandstone
Mg-calcite, plagioclase, quartz

39R-3, 22-24
Volcaniclastic sand
Pyroxene, plagioclase, K-feldspar

40R-1, 57-58
Silty clay, rich in limonite
Goethite, plagioclase (smectite?)

41R-3, 69-71
Clayey siltstone
Plagioclase (albite), smectite

42R-2, 90-91
Clayey siltstone
Plagioclase (quartz, smectite?)

43R-1, 62-63
Silty claystone (highly altered)
Smectite (various types)

43R-2, 66-68
Clayey siltstone (highly altered)
Smectite (various types)

Core, section, interval (cm)	Description	XRD identification: major (minor) minerals
180-1109C-
1H-1, 131-132	Silty clay	Calcite (quartz, plagioclase)
1H-4, 64.5-67	Calcareous silt	Calcite (quartz, plagioclase)
2H-4, 129-130	Calcareous clay	Calcite (aragonite)
3H-2, 87-88	Calcareous clay	Calcite (Mg-Calcite?)
4H-2, 105-106	Calcareous silty clay	Calcite (quartz, plagioclase)
5H-6, 58-59	Clay	Calcite (quartz, plagioclase)
6H-7, 5.5-6.6	Clayey silt	Calcite (quartz, plagioclase)
7H-5, 89-90	Clayey silt	Calcite (quartz, plagioclase)
10H-2, 42-43	Very fine sand to silt	Plagioclase, quartz, C/S? (chlorite, augite, amphibole, pyrite?)
11H-2, 104-105	Silty sand	Calcite, quartz, plagioclase, augite, C/S? (chlorite, amphibole)
12X-7, 25-26	Clay	C/S?, chlorite, quartz, plagioclase, calcite, augite (illite, amphibole)
13X-6, 117-118	Clay	C/S?, calcite, quartz, plagioclase, augite, chlorite (illite, amphibole)
14X-6, 142-143	Silty clay	Calcite, quartz, plagioclase, C/S? (chlorite, augite, amphibole, illite)
15X-6, 58-59	Clayey silt	Calcite, quartz, plagioclase, C/S? (chlorite, augite, amphibole, illite)
16X-3, 77-78	Sandy silt	Quartz, calcite, plagioclase, C/S? (chlorite, illite, augite, amphibole)
18X-4, 88-89	Sandy silt	C/S?, calcite, plagioclase, quartz, K-feldspar, augite (illite, amphibole)
19X-1, 120.5-121.5	Silty clay	Quartz, plagioclase, calcite, C/S? (illite, augite, amphibole)
20X-4, 88-89	Sandy silty clay	Calcite, plagioclase, quartz (C/S?, chlorite, augite, amphibole)
21X-CC-25-26	Clayey silt	Plagioclase, quartz, calcite (augite, C/S?, chlorite)
22X-1, 29.5-31	Fine sand	Plagioclase, calcite, quartz, C/S? (amphibole, augite, chlorite, illite)
23X-3, 32-33	Clayey silt	Calcite (plagioclase, quartz, C/S?, chlorite, amphibole, augite)
24X-CC, 11-12	Sand	Plagioclase, quartz, augite (amphibole, C/S?)
26X-3, 25-26	Clayey silt	Calcite, plagioclase, quartz (augite, C/S?, chlorite, sudoite?, amphibole)
27X-5, 115-116	Silty clay	Calcite (plagioclase, quartz, illite)
28X-4, 34-35	Clayey silt	Calcite, plagioclase (quartz, illite)
29X-3, 5-6	Sandy silt	Calcite (plagioclase, quartz)
29X-3, 39-40	Silty sand	Calcite, plagioclase (quartz)
30X-2, 33-34	Silty clay	Calcite, plagioclase (quartz, augite)
31X-3, 17-18	Sandy silt	Plagioclase, calcite, quartz, augite (chlorite, illite, amphibole)
32X-3, 107-108	Sandy silty clay	Calcite, quartz, plagioclase (chlorite, augite)
33X-6, 115-116	Sandy silty clay	Calcite, plagioclase, quartz (augite, chlorite, illite, I/V?, I/S?)
34X-2, 87-88	Clayey silt	Calcite, plagioclase, quartz (illite, augite, smectite?)
35X-6, 64.5-65	Silty clay	Calcite (quartz, plagioclase)
37X-2, 43.5-44.5	Calcareous clay	Calcite (quartz, plagioclase, smectite?))
38X-3, 53-54	Clayey silt	Calcite, plagioclase (quartz, illite, amphibole, chlorite, smectite?)
39X-6, 78-79	Silty clay	Plagioclase, cristobalite, calcite, amphibole (quartz, illite)
40X-4, 45.5-47	Silty clay	Calcite, K-feldspar, plagioclase, quartz (illite, amphibole, augite)
41X-2, 32-33	Sandy silty clay	Calcite, plagioclase, quartz (smectite?, illite, amphibole)

180-1109D-
2R-3, 39.5-42.5	Silty sandy claystone	Calcite, plagioclase, quartz (illite, chlorite, smectite?)
3R-6, 83-85	Clayey siltstone	Calcite, plagioclase, quartz (illite, amphibole, smectite?)
4R-4, 69-71	Clayey siltstone	Calcite, plagioclase, quartz (chlorite, smectite?, illite, amphibole)
5R-1, 60-61	Sandy silty claystone	Calcite, K-feldspar, plagioclase, quartz (chlorite, smectite?, illite)
6R-1, 39.5-41.5	Clayey siltstone	Calcite, plagioclase, quartz (chlorite, smectite?, illite, amphibole)
7R-3, 15-17	Calcareous claystone	Calcite, plagioclase, quartz (illite)
9R-3, 100-101	Clayey siltstone	Calcite, plagioclase, quartz (illite)
10R-1, 22.5-26	Clayey siltstone	Calcite, plagioclase, quartz (illite)
11R-3, 58-59	Silty claystone	Calcite, plagioclase, quartz (illite, amphibole)
12R-7, 10-11	Silty claystone	Calcite, plagioclase, quartz (illite, amphibole)
13R-3, 13.5-15.5	Siltstone	Calcite, plagioclase, quartz (illite, amphibole)
14R-2, 20-22	Silty claystone	Calcite, plagioclase, quartz (illite, amphibole)
15R-1, 81-82	Silty claystone	Calcite, plagioclase, quartz (illite, amphibole)
16R-1, 83-84	Silty sandstone	Calcite, quartz, plagioclase, aragonite, illite, amphibole (chlorite)
17R-3, 74-76.5	Siltstone	Calcite, plagioclase, quartz, amphibole, illite
18R-2, 12-14	Calcareous silty claystone	Calcite, plagioclase, quartz, illite (amphibole)
19R-2, 19-21	Calcareous clayey siltstone	Calcite, quartz (plagioclase, illite)
20R-4, 36-37	Calcareous silty claystone	Calcite, plagioclase, quartz (illite, augite)
21R-4, 66-68	Calcareous silty claystone	Calcite, plagioclase, quartz (illite, amphibole)
22R-1, 62-63	Claystone	Plagioclase, illite (mica)
22R-3, 59-60.5	Calcareous sandy siltstone	Calcite, quartz, plagioclase (illite, chlorite, amphibole)
23R-2, 33-34	Calcareous silty claystone	Calcite, plagioclase, quartz (illite)
24R-3, 70-71	Sandy siltstone	Plagioclase, calcite, quartz (illite)
25R-4, 78.5-79.5	Calcareous sandstone	Calcite, hornblende, quartz, plagioclase (illite)
26R-2, 36-38	Calcareous silty sandstone	Calcite, quartz, plagioclase (illite)
27R-1, 58-59	Packstone-grainstone	Calcite, aragonite, plagioclase (quartz, illite)
28R-1, 84-87	Packstone-grainstone	Calcite, plagioclase (quartz, amphibole, illite)
29R-1, 47-49	Packstone-grainstone	Plagioclase, calcite, quartz (illite, amphibole)
30R-1, 47-49	Packstone	Plagioclase, calcite, mica/illite, amphibole
31R-1, 77-79	Packstone-grainstone	Plagioclase, calcite, amphibole, quartz, illite
32R-2, 62-63	Packstone	Calcite (plagioclase)
35R-2, 103-103.5	Silty clay	Calcite, pyroxene, plagioclase, quartz (chlorite, illite)
35R-8, 55.5-57.5	Clayey siltstone	Calcite, plagioclase, quartz (pyroxene, amphibole, illite)
36R-6, 34-35	Calcareous clayey siltstone	Pyroxene, calcite, plagioclase (smectite?, illite)
37R-2, 97-98	Sandy siltstone	Plagioclase, quartz (illite, amphibole)
38R-6, 17-17.5	Sandstone	Mg-calcite, plagioclase, quartz
39R-3, 22-24	Volcaniclastic sand	Pyroxene, plagioclase, K-feldspar
40R-1, 57-58	Silty clay, rich in limonite	Goethite, plagioclase (smectite?)
41R-3, 69-71	Clayey siltstone	Plagioclase (albite), smectite
42R-2, 90-91	Clayey siltstone	Plagioclase (quartz, smectite?)
43R-1, 62-63	Silty claystone (highly altered)	Smectite (various types)
43R-2, 66-68	Clayey siltstone (highly altered)	Smectite (various types)

Note: C/S = chlorite-smectite mixed layer; I/V = illite-vermiculite; I/S = illite-smectite mixed layer.