A mass balance calculation can constrain whether quartz-amphibole veins in a meta-volcanic layer found in the Ritter Range Rood Pendant derived material from cm-scale diffusion from the surrounding wall rock or if some elements were transported from a distant source and deposited in the vein. This calculation is performed on an element by element basis thus potentially delineating patterns in the chemistry of the strictly locally derived versus far field elements. A suite of rock forming and common trace elements will be analyzed. The concentration of these elements in the wall rock, selvage, and vein will be measured in two methods: 1) physical separation of the wall rock and selvage and pulverization to perform bulk rock XRF and ICP-MS (will not be done on vein material because of the large average grain size) and 2) point counting, combined with in situ phase composition analysis by EPMA-WDS for major constituent elements and LA-ICP-MS for trace elements. The equation derived by Ague (1994) defines the change in concentration of an element from its original protolith concentration (in this case the selvage versus wall rock concentrations). It also takes into account any volume change the selvage experienced during alteration by referencing concentrations to an immobile suite of elements. The suite of immobile elements is chosen through a process described by Baumgartner and Olsen (1995). This process involves considering elements not found in the vein or found in very trace abundances and comparing these elements concentration ratios.