Oxygen and hydrogen isotope evidence for large-scale circulation and interaction between ground waters and igneous intrusions, with particular reference to the San Juan Volcanic Field, Colorado

• Main Author: Taylor, Hugh P., Jr.
• Other Authors: Hofmann, A. W., Giletti, B. J., Yoder, H. S., Jr., Yund, R. A.
• Format: Book Part
• Language: English
• Published: Carnegie Institution of Washington 1974
• Subjects: Red Rock; San Juan; muskox
• Online Access: https://authors.library.caltech.edu/117618/; https://authors.library.caltech.edu/117618/1/Taylor_1974p299.pdf; https://resolver.caltech.edu/CaltechAUTHORS:20221027-145941066

The 33 to 25 m.y.-old intrusive and volcanic rocks from western San Juan Mountains (Silverton-Ouray area of Colorado) are all abnormally low in O¹⁸ relative to most igneous rocks, particularly along the eastern edge of the Silverton Caldera where the average δO¹⁸ = -5. The only exceptions to this ar...