Table T4. Inorganic carbon, CaCO3 contents, and mineral components by X-ray diffraction of sediments, Hole 1183A. (See table note.)

Table T4. Inorganic carbon, CaCO₃ contents, and mineral components by X-ray diffraction of sediments, Hole 1183A.

Core, section,
interval, (cm)

Depth
(mbsf)

Subunit

Lithology

Inorganic
carbon
(wt%)

CaCO₃(wt%)

Mineral components (by XRD)

192-1183A-

2R-1, 23 328.23 IA Chalk 11.27 93.85 Calcite

3R-1, 25 337.85 IB Chalk 11.14 92.77 Calcite

4R-2, 18 348.88 IB Chalk 11.03 91.88 Calcite

5R-3, 48 360.28 IB Chalk 10.93 91.07 Calcite

6R-1, 64 366.94 IB Chalk 10.92 90.98 Calcite

7R-1, 33 376.23 IB Chalk 11.08 92.30 Calcite

8R-1, 84 386.34 IB Chalk 11.02 91.80 Calcite

9R-1, 25 395.35 IB Chalk 11.23 93.53 Calcite

10R-1, 85 405.55 IB Chalk 10.71 89.23 Calcite

10R-1, 145 406.15 IB Chalk 11.43 95.23 Calcite

10R-2, 45 406.65 IB Chalk NA NA Calcite

10R-2, 131 407.51 IB Chalk 11.27 93.85 Calcite

11R-5, 62 420.92 IB Chalk 11.31 94.24 Calcite

12R-3, 45 427.35 IB Chalk 11.44 95.32 Calcite

13R-3, 10 436.60 IB Chalk 11.34 94.45 Calcite

14R-CC, 9 444.59 IB Chalk 11.00 91.66 Calcite

15R-1, 86 752.86 IC Chalk 11.19 93.19 Calcite

16R-1, 46 761.56 IC Chalk 11.05 92.06 Calcite

17R-2, 13 772.43 IC Chalk 11.39 94.90 NA

17R-2, 80 773.10 IC Chalk 10.74 89.49 Calcite

18R-3, 15.5 783.66 IC Chalk 11.25 93.69 Calcite

19R-2, 83 792.43 IC Chalk 11.27 93.87 Calcite

19R-4, 19 794.79 IC Chalk, volcanic ash 5.91 49.26 Calcite, anorthite (minor); contains volcanic glass?

20R-1, 131 801.01 IC Chalk 10.83 90.20 Calcite

20R-3, 6 802.26 IC Chalk 11.11 92.58 Calcite

21R-4, 112 814.92 IC Chalk 10.82 90.10 Calcite

22R-CC, 0 827.84 IC Chalk 10.77 89.70 Calcite

23R-6, 68 836.78 IC Chalk 11.43 95.20 Calcite

24R-1, 62 838.82 IIA Limestone 11.40 94.98 Calcite

24R-CC, 6 841.12 IIA Limestone 11.37 94.72 Calcite

25R-CC, 6 849.14 IIA Limestone 11.63 96.91 Calcite

26R-CC, 14 857.14 IIA Limestone 11.60 96.66 Calcite

27R-CC, 18 866.78 IIA Limestone 11.53 96.06 Calcite

30R-1, 40 895.90 IIA Limestone 11.70 97.48 Calcite

31R-1, 27 905.37 IIA Limestone 11.62 96.77 Calcite

32R-1, 77 915.47 IIA Limestone 11.70 97.46 Calcite

33R-1, 41 924.71 IIA Limestone 11.65 97.01 Calcite

34R-1, 71 934.61 IIA Limestone 11.87 98.88 Calcite

35R-1, 97 944.47 IIA Limestone 11.84 98.65 Calcite

36R-2, 61 955.16 IIA Limestone 11.86 98.80 Calcite

36R-4, 87 958.42 IIA Limestone 11.70 97.45 Calcite

37R-1, 103 963.73 IIB Limestone 11.72 97.64 NA

37R-4, 67 967.84 IIB Limestone 11.38 94.82 Calcite

38R-6, 15 980.05 IIB Limestone 11.31 94.25 Calcite

39R-3, 45 985.45 IIB Limestone 11.55 96.24 Calcite

40R-1, 39 992.09 IIIA Limestone 12.08 100.65 Calcite

40R-3, 57 995.22 IIIA Limestone 11.83 98.56 NA

41R-1, 74 1002.14 IIIA Limestone 11.85 98.74 Calcite

42R-2, 28 1012.88 IIIA Limestone 11.72 97.59 Calcite

43R-1, 98 1021.78 IIIA Limestone 11.67 97.24 Calcite

45R-2, 19 1041.69 IIIA Limestone 11.87 98.85 Calcite

45R-2, 95 1042.45 IIIA Limestone 11.47 95.54 Calcite

46R-1, 42 1050.02 IIIA Limestone 11.71 97.52 Calcite

47R-1, 21 1059.41 IIIA Limestone 11.87 98.86 Calcite

48R-1, 9 1068.89 IIIA Limestone 11.88 98.99 Calcite

49R-CC, 14 1078.64 IIIA Limestone 11.86 98.79 Calcite

50R-1, 138 1089.58 IIIB Limestone 8.41 70.07 Calcite, illite, or quartz (volcanic ash)

50R-2, 81 1090.51 IIIB Limestone 11.48 95.64 Calcite

50R-2, 113 1090.83 IIIB Limestone 11.69 97.35 Calcite

50R-3, 32 1091.52 IIIB Limestone 11.36 94.63 Calcite

51R-3, 13 1101.03 IIIB Limestone 11.45 95.36 Calcite

52R-1, 140 1108.90 IIIB Limestone 10.50 87.43 Calcite

52R-4, 117 1113.17 IIIB Limestone 11.25 93.75 Calcite

53R-2, 83 1119.50 IIIB Brown claystone 11.45 95.37 Calcite, goethite, nontronite

53R-4, 49 1121.93 IIIB Limestone NA NA Calcite

53R-4, 84 1122.28 IIIB Brown claystone 4.91 40.88 NA

53R-4, 87 1122.31 IIIB Limestone 11.38 94.79 NA

54R-1, 48 1127.28 IIIB Brown claystone 1.58 13.14 Calcite, goethite (greater peak area than in 53R-2 sample), nontronite

54R-1, 66 1127.46 IIIB Limestone 11.59 96.54 Calcite

54R-2, 29 1128.59 IIIB Limestone 11.25 93.69 Calcite

54R-3, 26 1129.43 IIIB Vitric tuff NA NA Glauconite, anorthite, diopside, sanidine, orthoclase, magnetite, etc.; several peaks were not interpreted

54R-3, 78 1129.95 IIIB Vitric tuff NA NA Glauconite, anorthite, sanidine, diopside, orthoclase, magnetite, etc.; several peaks were not interpreted

55R-1, 9 1136.59 Basement Limestone 11.33 94.40 Calcite

60R-1, 84 1167.34 Basement Limestone NA NA Calcite, glauconite

Core, section, interval, (cm)	Depth (mbsf)	Subunit	Lithology	Inorganic carbon (wt%)	CaCO₃(wt%)	Mineral components (by XRD)
192-1183A-
2R-1, 23	328.23	IA	Chalk	11.27	93.85	Calcite
3R-1, 25	337.85	IB	Chalk	11.14	92.77	Calcite
4R-2, 18	348.88	IB	Chalk	11.03	91.88	Calcite
5R-3, 48	360.28	IB	Chalk	10.93	91.07	Calcite
6R-1, 64	366.94	IB	Chalk	10.92	90.98	Calcite
7R-1, 33	376.23	IB	Chalk	11.08	92.30	Calcite
8R-1, 84	386.34	IB	Chalk	11.02	91.80	Calcite
9R-1, 25	395.35	IB	Chalk	11.23	93.53	Calcite
10R-1, 85	405.55	IB	Chalk	10.71	89.23	Calcite
10R-1, 145	406.15	IB	Chalk	11.43	95.23	Calcite
10R-2, 45	406.65	IB	Chalk	NA	NA	Calcite
10R-2, 131	407.51	IB	Chalk	11.27	93.85	Calcite
11R-5, 62	420.92	IB	Chalk	11.31	94.24	Calcite
12R-3, 45	427.35	IB	Chalk	11.44	95.32	Calcite
13R-3, 10	436.60	IB	Chalk	11.34	94.45	Calcite
14R-CC, 9	444.59	IB	Chalk	11.00	91.66	Calcite
15R-1, 86	752.86	IC	Chalk	11.19	93.19	Calcite
16R-1, 46	761.56	IC	Chalk	11.05	92.06	Calcite
17R-2, 13	772.43	IC	Chalk	11.39	94.90	NA
17R-2, 80	773.10	IC	Chalk	10.74	89.49	Calcite
18R-3, 15.5	783.66	IC	Chalk	11.25	93.69	Calcite
19R-2, 83	792.43	IC	Chalk	11.27	93.87	Calcite
19R-4, 19	794.79	IC	Chalk, volcanic ash	5.91	49.26	Calcite, anorthite (minor); contains volcanic glass?
20R-1, 131	801.01	IC	Chalk	10.83	90.20	Calcite
20R-3, 6	802.26	IC	Chalk	11.11	92.58	Calcite
21R-4, 112	814.92	IC	Chalk	10.82	90.10	Calcite
22R-CC, 0	827.84	IC	Chalk	10.77	89.70	Calcite
23R-6, 68	836.78	IC	Chalk	11.43	95.20	Calcite
24R-1, 62	838.82	IIA	Limestone	11.40	94.98	Calcite
24R-CC, 6	841.12	IIA	Limestone	11.37	94.72	Calcite
25R-CC, 6	849.14	IIA	Limestone	11.63	96.91	Calcite
26R-CC, 14	857.14	IIA	Limestone	11.60	96.66	Calcite
27R-CC, 18	866.78	IIA	Limestone	11.53	96.06	Calcite
30R-1, 40	895.90	IIA	Limestone	11.70	97.48	Calcite
31R-1, 27	905.37	IIA	Limestone	11.62	96.77	Calcite
32R-1, 77	915.47	IIA	Limestone	11.70	97.46	Calcite
33R-1, 41	924.71	IIA	Limestone	11.65	97.01	Calcite
34R-1, 71	934.61	IIA	Limestone	11.87	98.88	Calcite
35R-1, 97	944.47	IIA	Limestone	11.84	98.65	Calcite
36R-2, 61	955.16	IIA	Limestone	11.86	98.80	Calcite
36R-4, 87	958.42	IIA	Limestone	11.70	97.45	Calcite
37R-1, 103	963.73	IIB	Limestone	11.72	97.64	NA
37R-4, 67	967.84	IIB	Limestone	11.38	94.82	Calcite
38R-6, 15	980.05	IIB	Limestone	11.31	94.25	Calcite
39R-3, 45	985.45	IIB	Limestone	11.55	96.24	Calcite
40R-1, 39	992.09	IIIA	Limestone	12.08	100.65	Calcite
40R-3, 57	995.22	IIIA	Limestone	11.83	98.56	NA
41R-1, 74	1002.14	IIIA	Limestone	11.85	98.74	Calcite
42R-2, 28	1012.88	IIIA	Limestone	11.72	97.59	Calcite
43R-1, 98	1021.78	IIIA	Limestone	11.67	97.24	Calcite
45R-2, 19	1041.69	IIIA	Limestone	11.87	98.85	Calcite
45R-2, 95	1042.45	IIIA	Limestone	11.47	95.54	Calcite
46R-1, 42	1050.02	IIIA	Limestone	11.71	97.52	Calcite
47R-1, 21	1059.41	IIIA	Limestone	11.87	98.86	Calcite
48R-1, 9	1068.89	IIIA	Limestone	11.88	98.99	Calcite
49R-CC, 14	1078.64	IIIA	Limestone	11.86	98.79	Calcite
50R-1, 138	1089.58	IIIB	Limestone	8.41	70.07	Calcite, illite, or quartz (volcanic ash)
50R-2, 81	1090.51	IIIB	Limestone	11.48	95.64	Calcite
50R-2, 113	1090.83	IIIB	Limestone	11.69	97.35	Calcite
50R-3, 32	1091.52	IIIB	Limestone	11.36	94.63	Calcite
51R-3, 13	1101.03	IIIB	Limestone	11.45	95.36	Calcite
52R-1, 140	1108.90	IIIB	Limestone	10.50	87.43	Calcite
52R-4, 117	1113.17	IIIB	Limestone	11.25	93.75	Calcite
53R-2, 83	1119.50	IIIB	Brown claystone	11.45	95.37	Calcite, goethite, nontronite
53R-4, 49	1121.93	IIIB	Limestone	NA	NA	Calcite
53R-4, 84	1122.28	IIIB	Brown claystone	4.91	40.88	NA
53R-4, 87	1122.31	IIIB	Limestone	11.38	94.79	NA
54R-1, 48	1127.28	IIIB	Brown claystone	1.58	13.14	Calcite, goethite (greater peak area than in 53R-2 sample), nontronite
54R-1, 66	1127.46	IIIB	Limestone	11.59	96.54	Calcite
54R-2, 29	1128.59	IIIB	Limestone	11.25	93.69	Calcite
54R-3, 26	1129.43	IIIB	Vitric tuff	NA	NA	Glauconite, anorthite, diopside, sanidine, orthoclase, magnetite, etc.; several peaks were not interpreted
54R-3, 78	1129.95	IIIB	Vitric tuff	NA	NA	Glauconite, anorthite, sanidine, diopside, orthoclase, magnetite, etc.; several peaks were not interpreted
55R-1, 9	1136.59	Basement	Limestone	11.33	94.40	Calcite
60R-1, 84	1167.34	Basement	Limestone	NA	NA	Calcite, glauconite

Note: XRD = X-ray diffraction, NA = not analyzed.