Importance of groundwater in propagating downward integration of the 6 – 5 Ma Colorado River system : Geochemistry of springs , travertines , and lacustrine carbonates of the Grand Canyon region over the past 12

@inproceedings{Crossey2015ImportanceOG,
  title={Importance of groundwater in propagating downward integration of the 6 – 5 Ma Colorado River system : Geochemistry of springs , travertines , and lacustrine carbonates of the Grand Canyon region over the past 12},
  author={L. C. Crossey and Karl E. Karlstrom and Rebecca J. Dorsey and Julian A. Pearce and Elaine Lew Yee Wan and Lauren Beard and Yemane Asmerom and Victor J. Polyak and Ryan S. Crow and Andrew Cohen and Jordon Bright and M. E. Pecha},
  year={2015}
}
We applied multiple geochemical tracers (87Sr/86Sr, [Sr], d13C, and d18O) to waters and carbonates of the lower Colorado River system to evaluate its paleohydrology over the past 12 Ma. Modern springs in Grand Canyon reflect mixing of deeply derived (endogenic) fluids with meteoric (epigenic) recharge. Travertine (<1 Ma) and speleothems (2–4 Ma) yield 87Sr/86Sr and d13C and d18O values that overlap with associated water values, providing justification for use of carbonates as a proxy for the… CONTINUE READING