2-2-2-2-2-2-2-2-2-2-2-2-2 From: Julia Hammer <jhammer@xxxxxxxxxx> Dear Volcano List Colleagues, It is with a heavy heart that I share news that Malcolm "Mac" Rutherford passed away on October 3, 2023, three weeks after suffering a stroke. Mac grew up in Saskatchewan and studied Engineering at the University of Saskatchewan. He turned toward geology after carrying out field work for a mining company. After obtaining a PhD from Johns Hopkins University in 1968, he pursued postdoctoral research at the University of California at Los Angeles and joined the faculty at Brown University in 1970, where he served as Chair of the Department of Geological Sciences from 1986-1991. At Brown, Mac taught field geology, volcanology, geologic hazards, and planetary petrology. His early-career scientific interests were shaped by two events on the world stage: the NASA Apollo program and the 1980 eruption of Mount St. Helens. The latter launched a sequence of pivotal contributions, culminating in an experimental approach for placing limits on the environmental conditions at which magmas were stored prior to eruption. He applied the approach to eruptions of Soufriere Hills Volcano, El Chichón, Pinatubo, Campi Flegrei, Novarupta, Unzen, Mazama, Black Butte, and others. This "phase equilibrium approach" was embraced by the volcanological community and has become a part of Ê»petrologic monitoringÊ» restless volcanoes. Additional areas where Mac's experiments advanced scientific understanding of petrology and volcanism include the petrogenesis of Martian SNC magmas; the origin, speciation, and concentrations of volatiles in the lunar interior; the formation of lunar highlands KREEP; the solubility and speciation of sulfur in a variety of magma compositions; defining the conditions leading to liquid immiscibility; mineral barometry, esp. involving amphiboles; and the kinetics of crystal nucleation and growth. Mac continued to engage in research long after retirement (2006) by advising students, supporting postdocs, publishing papers, collaborating, attending conferences, and performing experiments -- most recently, a run in "Bertha" the internally heated pressure vessel, on Sept 4. Mac fostered a warm, collaborative, supportive research group, mentoring dozens of students over decades who went on to NASA, university faculties, the United States Geological Survey, federal labs, and work in industry. His legacy of science and mentoring contributions extends to all corners of the Earth and across the solar system. A google sheet <https://urldefense.com/v3/__https://docs.google.com/document/d/15x-HNOwkrNyzBdnPooxsAsdFc9Bki2s7qUErYF1UcTo/edit__;!!IKRxdwAv5BmarQ!ZuF6Nrbym9QIEA8oTppofkQjqLyKCv0tSnjY9xXoQ0rjCHqAr_JySO15F53i6wbMkKoMllc0LotKVyBBmg$> has been created for those who would like to share a memory about Mac with the community and his family. Information about events celebrating Macâ??s life will be posted on the sheet as plans develop. Also, please see and share this LinkedIn page <https://urldefense.com/v3/__https://www.linkedin.com/posts/venezky_i-write-with-sad-news-which-may-or-may-not-activity-7115486557502902272-UuI_?__;!!IKRxdwAv5BmarQ!ZuF6Nrbym9QIEA8oTppofkQjqLyKCv0tSnjY9xXoQ0rjCHqAr_JySO15F53i6wbMkKoMllc0Lou2siPtBg$> with any interested friends and colleagues who may not subscribe to this list. Sincerely, Julia Hammer Google sheet: https://urldefense.com/v3/__https://docs.google.com/document/d/15x-HNOwkrNyzBdnPooxsAsdFc9Bki2s7qUErYF1UcTo/edit__;!!IKRxdwAv5BmarQ!cVIRPcOl2kCUIbzbhwpbUl4-a9Hxo9mkfwxaHfKohAEuCtJoFj9jeiBJL39owVsgCXQrmRO79kJ9w14d$ <https://urldefense.com/v3/__https://docs.google.com/document/d/15x-HNOwkrNyzBdnPooxsAsdFc9Bki2s7qUErYF1UcTo/edit__;!!IKRxdwAv5BmarQ!ZuF6Nrbym9QIEA8oTppofkQjqLyKCv0tSnjY9xXoQ0rjCHqAr_JySO15F53i6wbMkKoMllc0LotKVyBBmg$> LinkedIn: https://urldefense.com/v3/__https://www.linkedin.com/posts/venezky_i-write-with-sad-news-which-may-or-may-not-activity-7115486557502902272-UuI___;!!IKRxdwAv5BmarQ!cVIRPcOl2kCUIbzbhwpbUl4-a9Hxo9mkfwxaHfKohAEuCtJoFj9jeiBJL39owVsgCXQrmRO79jFYJOQY$ <https://urldefense.com/v3/__https://www.linkedin.com/posts/venezky_i-write-with-sad-news-which-may-or-may-not-activity-7115486557502902272-UuI___;!!IKRxdwAv5BmarQ!ZuF6Nrbym9QIEA8oTppofkQjqLyKCv0tSnjY9xXoQ0rjCHqAr_JySO15F53i6wbMkKoMllc0LosYIgDPyg$> ? 2-2-2-2-2-2-2-2-2-2-2-2-2 ------------------------------
