In Memoriam: John Hayes
February 10, 2017
John Michael Hayes, born September 6, 1940, passed away at his home in Berkeley, California, on February 3, 2017. John Hayes was a leader in the fields of organic geochemistry and biogeochemistry who opened these fields to stable isotopes with his pioneering work in compound specific isotopes (CSIA). The impact of CSIA in present day chemistry has been wide-reachin; it is used in drug analyses, forensic geochemistry, food processing, blood testing, and environmental geochemistry, and it has entered the popular culture via forensic science focused TV shows. His generosity of spirit and enthusiasm for bringing together the ideas and practitioners of geology, chemistry, and biology to inform each other, was at the core of his impact across disciplines. His ground-breaking work in CSIA and his legacy of an interdisciplinary approach to research was transformative and contributed profoundly to our understanding of the Earth's organic processes.