ENERGY-DISPERSIVE X-RAY FLOURESCENCE (EDXRF) ANALYSIS OF MAJOR, MINOR AND TRACE ELEMENTS FOR VOLCANIC ROCKS FROM THE JEMEZ MOUNTAINS, NORTHERN NEW MEXICO

The analysis here of 22 volcanic rock samples indicates a diverse set of volcanic rock types (Table 1, Figures 1 through 2).  The obsidian nodules collected from Turkey Ridge rhyolite on the NW side of Cerro Rubio are most definitely derived from the Cerro Toledo Rhyolite (CTR) event based on comparison with a large body of CTR source standards from Rabbit Mountain and the ash flow tuff to the south including "Obsidian Ridge" (see Shackley 2005; Table 2 and 3 and Figure 2 herein).  Using XRF the composition is well within those standards (see Table 2 and Figures 2 and 3).