Core sample analysis SWIR spectrometry was most successful with samples from Holes 1188A, 1188F, and 1189A. Little success was achieved with samples from Sites 1190 and 1191 because of the glassy nature of the material. Mechanical malfunctions of the PIMA resulted in impossibility to analyze the XRD powders from Hole 1188F or any material from Hole 1189B.
Illite, chlorite, and pyrophyllite were the major clay minerals identified during qualitative analysis of the data. All three minerals were found in samples from Snowcap (Site 1188), while only illite and chlorite were detected at the high-temperature Roman Ruins (Site 1189). The distribution of these minerals at each of the sites is shown in Figures F1 and F2. Spectroscopic data for both of these sites are presented in Tables T1 and T2. The composition of illite at Site 1188 ranges between paragonitic to potassic. In Hole 1188F, a distinct trend is shown by illite, which becomes more potassic in composition with depth (Fig. F3). At Site 1189, illite was generally potassic in composition (Fig. F4).