Table
T8. Alteration minerals hosted by igneous rocks in Hole 1136A
identified by X-ray diffraction.
Core,
section,
interval (cm)Depth
(mbsf)Description
XRD
identification
183-1136A-
15R-1
(Piece 2, 8-14)
128.08
Highly
altered basalt
Celadonite
+ saponite + nontronite
15R-2
(Piece 1B, 65-67)
128.85
Green
clay in vein
Celadonite
+ saponite + nontronite
15R-2
(Piece 1D, 124-125)
129.44
Carbonate
vein
Calcite
17R-1
(Piece 8, 78-79)
144.68
Green
clay in coalesced vesicle
Saponite
+ nontronite
18R-1
(Piece 1, 61-63)
147.91
Carbonate
in vesicle
Calcite
18R-3
(Piece 1C, 31-32)
150.29
Green
clay in vein
Saponite
+ nontronite + quartz
18R-4
(Piece 1F, 85-86)
151.64
Green
clay in vein
Saponite
+ nontronite illite
19R-1
(Piece 5L, 120-122)
158.10
Zeolite
and clay in vein
Clinoptilolite
+ heulandite + saponite + nontronite
19R-2
(Piece 8, 106-108)
159.50
Zeolite
and clay in vesicle
Clinoptilolite
+ heulandite + saponite + nontronite
Note: XRD = X-ray diffraction.