Table T10. Minerals identified by X-ray diffraction analysis, Hole 1188B.

Table T10. Minerals identified by X-ray diffraction analysis, Hole 1188B.

Core, section, interval (cm)

Unit

Description

XRD identification: major (minor) minerals*

193-1188B-

1Z-1, 0-15 1 Completely altered, bleached, locally sparsely vesicular volcanic rock Cristobalite (plagioclase, anhydrite, pyrite, illite, chlorite)

1Z-1, 16-31 1 Completely altered, bleached, locally sparsely vesicular volcanic rock Cristobalite (pyrite, illite, quartz, anhydrite)

Core, section, interval (cm)	Unit	Description	XRD identification: major (minor) minerals*
193-1188B-
1Z-1, 0-15	1	Completely altered, bleached, locally sparsely vesicular volcanic rock	Cristobalite (plagioclase, anhydrite, pyrite, illite, chlorite)
1Z-1, 16-31	1	Completely altered, bleached, locally sparsely vesicular volcanic rock	Cristobalite (pyrite, illite, quartz, anhydrite)

Note: XRD = X-ray diffraction. * = the terms major and minor are applied to XRD analyses as explained in "Hydrothermal Alteration" in the "Explanatory Notes" chapter and do not imply quantitative abundances.S