Helium Isotope Ratios in South Sister Volcano Vicinity, Cold Springs
Matthijs C. van Soest, B. Mack Kennedy, William C. Evans 1 , Robert H. Mariner, and Mariek E. Schmidt
Contact: Matthijs C. van Soest, 510/486-5659, mcvan s oest@lbl.gov .
Research Objectives
As part of a geochemical monitoring project at Oregon's South Sister volcano--a volcano that is undergoing strong uplift (Wicks et al., 2002)--we are carrying out a detailed study of helium isotope ratios in cold and hot springs in the Separation Creek drainage area. Through this study, we hope to determine the occurrence of any changes in spring chemistry that could be related to the ongoing uplift.
To continue reading more about this project, view the 1-page pdf here.
|
 (a) Overview map of the Three Sisters area, central Oregon, with sample locations and helium isotope results, using color coding for sampling date and general spring chemistry indication; (b) Plot of helium isotope ratio vs. distance from the volcano, with d13C values next to each data point showing a similar trend.
|
