Summary
This 2016 geochemical study examined osmium and uranium-thorium isotope signatures in samples from Mount Mazama, the volcanic system underlying Crater Lake, Oregon. By analysing isotopic compositions in volcanic rocks and minerals, the authors characterised the mantle sources and magmatic processes contributing to arc volcanism in the Cascade Range. The findings provide constraints on the petrogenesis of this major volcanic system and contribute to understanding subduction zone magmatism in the Pacific Northwest.
UK applicability
This is a fundamental geochemical study of North American volcanism with no direct application to UK farming systems, soil health, or food production. It falls outside the scope of Vitagri's Pulse Brain.
Key measures
Os isotope ratios (187Os/188Os), U–Th isotope ratios, and their variations across different volcanic samples and mineral phases
Outcomes reported
This paper analysed osmium and uranium-thorium isotope ratios in volcanic rocks and minerals from the Mount Mazama volcanic system to characterise the geochemical signatures of arc magmatism. The study reports isotopic compositions that constrain the mantle sources and magmatic evolution of this Cascade Range volcano.
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