Fig. 5

IR mapping result for chlorite-zone specimen No. 7-93. a Optical photomicrograph, plane-polarized light. b Cross-polarized light. The IR mapped areas are shown by squares. c Water distributions using the calibration of Paterson (1982). Numbers represent raw IR spectra in d. Spectra for the lowest (line 1) and highest (line 2) water contents are shown. Other spectra are mixtures of quartz (Qtz) and phyllosilicates (Phyl) and show large variations in band components and water contents