Frank Tepley

Frank Tepley is a distinguished professor of geology and the director of the Geology Program at Oregon State University. With a profound expertise in igneous petrology, isotope geochemistry, and electron probe microscopy, he has made significant contributions to the field of geology. His research is primarily centered around the compositional variations and in situ Sr-isotopes in plagioclase feldspars, which he utilizes to unravel the complexities of magma mixing and crustal contamination. Tepley's work extends to the exploration of textural and geochemical information of plagioclase megacrysts found in plagioclase ultraphyric basalts. Through this, he seeks to understand the processes that alter primary mantle-generation basalt compositions during their transport through the crust. His innovative approach involves the use of major- and trace-element diffusional profiles in mineral phases, which he employs to determine the time scales of magma mixing processes. In addition to his work on magma mixing, Frank Tepley is deeply engaged in the study of U-series disequilibria in whole rocks and minerals. This research aims to decipher the sources of slab-derived components in arc magmas, providing valuable insights into the geochemical processes at play in volcanic regions. His current research interests are diverse, encompassing phase thermometry and its implications for plutonic thermal histories. Tepley's investigations also delve into the trace element compositions of zircons, measured using electron microprobe (EMP) techniques. This aspect of his research is crucial for understanding the intricate details of volcanic shard compositions, particularly those related to the Neogene eruptions in Southwest Japan. His work not only advances the scientific understanding of geological processes but also contributes to the broader knowledge of Earth's dynamic systems. As a leader in his field, Frank Tepley continues to inspire and mentor the next generation of geologists, fostering a deep appreciation for the complexities of Earth's geological history. His dedication to research and education has solidified his reputation as a prominent figure in the geological sciences community.