Table T14. Alteration minerals within basement units in Hole 1138A identified by X-ray diffraction.

Core, section,
piece, interval (cm)
Depth
(mbsf)
Description XRD identification
183-1138A-


80R-1 (Piece 6, 36-37) 746.66 Prismatic crystals in vug Calcite
80R-1 (Piece 15, 120) 747.50 Prismatic crystals in vug Calcite, clinoptilolite
81R-1 (Piece 11, 102-104) 756.92 White porcelain zeolite in vug Clinoptilolite, smectite
81R-1 (Piece 14, 132-135) 757.22 Dark equant zeolite lining vesicle Clinoptilolite, smectite
81R-3 (Piece 3A, 61-65) 759.26 White porcelain solid in vesicular clast within breccia Quartz
81R-4 (Piece 11, 97-98) 761.08 Mucous-like green tendrils in vesicle Clinoptilolite
82R-3 (Piece 4, 28-45) 768.85 Well-indurated brown sediment in breccia matrix Quartz
82R-4 (Piece 3, 74-75) 770.78 Equant crystals in vesicle Quartz, clinoptilolite
82R-5 (Piece 9, 136-138) 772.90 Amber equant zeolite in vug Clinoptilolite
83R-1 (Piece 3B, 33-34) 775.53 Green equant zeolite in vesicle Quartz, clinoptilolite
83R-1 (Piece 3B, 42-43) 775.62 White platy zeolite in vesicle within breccia Clinoptilolite
83R-2 (Piece 5B, 47-48) 777.17 White platy zeolite in vesicle Clinoptilolite
83R-2 (Piece 5B, 48-49) 777.18 Zeolite + clay in vesicle Clinoptilolite, smectite
83R-4 (Piece 9, 112-114) 780.63 Green equant zeolite in vug Clinoptilolite
83R-5 (Piece 2, 15-16) 781.08 Tan zeolite blades in vesicle Clinoptilolite
84R-2 (Piece 10, 98-101) 787.16 Amber zeolite in breccia matrix Clinoptilolite
84R-3 (Piece 1, 12-13) 787.62 White zeolite in breccia matrix Clinoptilolite
85R-1 (Piece 10, 94-94) 795.44 Equant zeolite in vesicle Clinoptilolite
86R-1 (Piece 8, 110-111) 805.20 Platy white zeolite in vesicle Clinoptilolite
86R-3 (Piece 7, 60-61) 807.70 White zeolite vein Clinoptilolite
87R-1 (Piece 2, 11-13) 813.81 Large zeolite crystal in center of vug Analcime
87R-1 (Piece 13, 105-106) 814.75 Platy zeolite in breccia vug Clinoptilolite
89R-1 (Piece 5, 84-85) 833.94 Zeolite crystals in vug Clinoptilolite
89R-3 (Piece 1B, 20-21) 836.06 White zeolite in vesicle Clinoptilolite