Table T4. X-ray diffraction results, carbonate contents, and total and organic carbon contents expressed as CaCO3 and C for Hole 1138A.

Unit,core, section,
interval (cm)		 Depth
(mbsf)		 Minerals CaCO3
(wt%)		 Total
carbon (wt%)		 Organic carbon
(wt%)
Unit I  
     
183-1138A-  
     
1R-3, 69 3.69 Calcite, clay (montmorillonite?), opal-A, quartz, K-feldspar 18 2.35 0.24
3R-4, 17 21.77 Calcite, clay (montmorillonite?), opal-CT, K-feldspar, glauconite, (opal-A, quartz) 44    
4R-4, 92 31.92 Calcite, opal-A, quartz, K-feldspar, clay (montmorillonite?) 46 5.69 0.19
5R-1, 92 36.92 Opal-A, calcite, (quartz) 19    
6R-1, 92 46.32 Calcite, opal-A, K-feldspar, (clay) 11    
7R-1, 92 55.72 Calcite, opal-A, (feldspar) 23 2.92 0.12
8R-1, 92 65.22 Calcite, opal-A, feldspar, clay (montmorillonite?), (quartz, opal-CT) 14    
9R-1, 92 74.62 Calcite, opal-A, (opal-CT, feldspar) 39 4.75 0.11
10R-1, 92 84.02 Opal-A, calcite, (feldspar, clay, opal-CT) 4 0.63 0.13
11R-1, 92 93.62 Opal-A, calcite, (feldspar, clay, pyrite) 20    
12R-1, 91 103.21 Opal-A, opal-CT, calcite, K-feldspar, clay, (quartz) 13    
Unit II  
     
183-1138A-  
     
13R-1, 92 112.92 Calcite, K-feldspar, (opal-A, clay) 57 6.80 0.00
14R-1, 92 122.52 Calcite, K-feldspar, (clay) 62    
15R-1, 91 132.11 Calcite, opal-A, K-feldspar, clay 24 2.92 0.00
16R-1, 91 141.71 Calcite, (feldspar) 76    
17R-1, 92 151.42 Calcite, (feldspar) 84    
18R-1, 92 161.02 Calcite 87 10.41 0.02
19R-1, 92 170.62 Calcite 91    
20R-1, 92 180.22 Calcite, (feldspar, clay, glass) 69    
21R-1, 91 189.91 Calcite 94 11.27 0.00
22R-1, 89 199.49 Calcite 95    
23R-1, 91 209.11 Calcite, (quartz?) 90    
24R-1, 91 218.71 Calcite 94 11.32 0.00
26R-1, 92 238.02 Calcite 93    
27R-1, 92 247.62 Calcite 94    
28R-1, 92 257.32 Calcite 94 11.30 0.00
Unit III  
     
183-1138A-  
     
29R-1, 92 266.82 Calcite 92    
30R-1, 92 276.42 Calcite 91    
33R-1, 71 305.11 Calcite, (clay, opal?) 80 9.65 0.00
34R-1, 92 315.02 Calcite, (clay, opal?) 74    
35R-1, 92 324.62 Calcite, (clay, opal?) 72 8.60 0.00
36R-1, 92 333.92 Calcite 92    
37R-2, 65 344.75 Calcite, (clinoptilolite, glauconite)      
37R-2, 67 344.77 Calcite 92    
38R-1, 91 353.11 Calcite 93 11.24 0.07
39R-1, 92 362.72 Calcite 92    
40R-1, 91 372.41 Calcite 96    
41R-1, 91 382.11 Calcite      
42R-1, 92 391.72 Calcite 93 11.13 0.00
43R-1, 92 401.32 Calcite 93    
44R-1, 91 410.91 Calcite 96    
46R-1, 91 430.21 Calcite 95 11.43 0.00
47R-1, 91 439.81 Calcite 94    
48R-1, 92 449.52 Calcite 92    
49R-1, 91 459.11 Calcite, (clinoptilolite) 93 11.18 0.00
50R-1, 91 468.41 Calcite 95    
51R-1, 92 478.02 Calcite 87    
53R-1, 92 497.32 Calcite 95 11.39 0.00
54R-1, 92 506.52 Calcite 93    
55R-1, 92 516.22 Calcite 93    
56R-1, 82 525.72 Calcite 94 11.34 0.02
59R-1, 91 554.51 Calcite 93    
61R-2, 83 575.23 Calcite 95    
62R-1, 91 583.41 Calcite 92 11.26 0.17
63R-1, 90 593.10 Calcite 96    
Unit IV  
     
138-1139A-  
     
64R-1, 91 602.71 Calcite 93    
66R-1, 91 622.01 Calcite 96 11.56 0.04
67R-1, 90 631.60 Calcite, opal-CT, opal-A, quartz 77    
68R-1, 85 641.25 Calcite, opal-CT, opal-A, (quartz) 61    
69R-1, 91 650.91 Calcite, opal-CT, opal-A, (quartz) 58 6.94 0.00
69R-5, 90 656.47 Clinoptilolite, pyrite, quartz, montmorillonite 1 2.38 2.24
Unit V  
     
69R-6, 91 657.98 Glauconite, calcite, clay 7    
70R-1, 92 660.52 Calcite, opal-CT, opal-A, clinoptilolite 55 6.73 0.07
71R-2, 17 670.67 Calcite, glauconite, clinoptilolite, 12    
Unit VI  
     
72R-2, 60 680.98 Siderite, kaolinite, pyrite, gibbsite(?) 12 6.99 5.55
73R-2, 65 689.96 Siderite, kaolinite, gibbsite(?), (pyrite) 14    
73R-3, 136 691.62 Kaolinite, hematite, quartz, goethite 1    

Note: Minerals listed in parentheses are present only in trace amounts. See "Organic and Inorganic Geochemistry".