From Site 1190, only one fresh igneous rock (Sample 193-1190C-2R-1, 3-5 cm; 3.53 mbsf) was analyzed. This sample is representative of the material in the core obtained from the site. The sample was analyzed by nitrogen, carbon, sulfur (NCS) elemental analyzer for elemental concentrations of total hydrogen and sulfur. Major element oxides and trace elements (Zr, Sr, Cu, Zn, Ba, and Y) were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) using the igneous method described in "Geochemistry" in the "Explanatory Notes" chapter.
The analytical results for the ignited powder Sample 193-1190C-2R-1, 3-5 cm, are given in Table T5, together with rock composition and total sulfur and water values as obtained by elemental analysis. In terms of CIPW norm mineralogy and total alkali vs. silica classification for igneous rocks, the composition of the sample can be described as a dacite. The chemical character of the fresh sample from Hole 1190C is comparable to the fresh rocks in Holes 1188A and 1191A but is slightly enriched in SiO2 with respect to the fresh rock analyzed from Hole 1189A (Section 193-1189A-1R-1).