Triple oxygen isotopes of meteoric hydrothermal systems – implications for palaeoaltimetry
C. Page Chamberlain, Daniel Ibarra, Max K. Lloyd, Tyler Kukla, D. J. Sjostrom, Yuan Gao, Z. D. Sharp
Abstract
We use triple oxygen isotopes of altered granitic rocks to determine the isotope composition of meteoric waters in a fossil hydrothermal system, the low 18 O Eocene Idaho Batholith, originally studied by In doing so we: 1) test whether meteoric water values estimated from previous 18 O and D analyses on quartz, feldspar and biotite are robust and 2) determine the palaeoelevation of the Eocene highlands that are presently constrained primarily by the 18 O and D of paired muscovite and quartz from core complexes and altered granites.
Topics & Concepts
Hydrothermal circulationIsotopes of oxygenMeteoric waterOxygenGeochemistryIsotopeRadiochemistryGeologyChemistryNuclear physicsPaleontologyPhysicsOrganic chemistryAstro and Planetary ScienceGeology and Paleoclimatology ResearchIsotope Analysis in Ecology