Table of Contents
Minerals, Volume 8, Issue 12 (December 2018)
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Cover Story (view full-size image) In this study of the Bingham Canyon porphyry district, Utah, we report the widest range in the [...] Read more. In this study of the Bingham Canyon porphyry district, Utah, we report the widest range in the isotopic composition of thallium ever recorded in a hydrothermal system. The most extreme isotopic fractionations (both positive and negative) are observed in hydrothermal breccias and samples from the distal (~7 km) disseminated gold deposits at Melco and Barneys Canyon. These samples also tend to contain elevated Tl-Sb-As, suggesting that ε^205 Tl excursions are related to the migration of low-temperature hydrothermal fluids, potentially related to sediment-hosted gold mineralization. View this paper