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Dear Isogeochemists around the world,

Kate Freeman passed along the very  sad news that John Hayes passed away on
Feb. 3.  He died peacefully at home, surrounded by his children and
grandchildren.  Many of us last saw John at the American Geophysical Union
meeting in December, where he was his usual lovely and gregarious self.  He
took a slew of photographs, gave an insightful talk, and participated in
lively discussion on a panel of isotope experts.  In recent years, John was
getting back into science while enjoying many other things that kept him a
vibrant person -- family, music, photography, travel, and sharing good food,
wine, and laughter with friends.

John was an inspiration for my entire career, and I am sure many of the
folks on this list serve as well. Always a character, rarely a shrinking
violet, a true pioneer and foundation of our field of science. We will miss
him in many ways. 

Regards, Marilyn Fogel

Obituary (posted by Anne Hayes Hartman)

John Michael Hayes, born September 6, 1940, passed away at his home in
Berkeley, California, on February 3, 2017, of idiopathic pulmonary fibrosis.
Hayes was a geochemist, receiving a B.S. from Iowa State University in 1962
and a Ph.D. from the Massachusetts Institute of Technology in 1966. He was a
professor at Indiana University for 26 years, then in 1996 became director
of the National Ocean Sciences Accelerator Mass Spectrometry facility at
Woods Hole Oceanographic Institution, and also served as a professor at
Harvard University. He has lived in Berkeley since 2007.

Born in Seattle, Washington, John Hayes grew up in Montana and Iowa,
attending 13 schools before graduating from high school in Perry, Iowa, as
his family moved regularly for his fatherıs job with the Chicago, Milwaukee,
St. Paul and Pacific Railroad. In 1962, he married Janice Maria (Boeke)
Hayes of Hubbard, Iowa, whom he met at Iowa State University. They
celebrated their 51st wedding anniversary before her death in 2013. He is
survived by his children James T. Hayes of Honolulu, Hawaii, Anne Hayes
Hartman of Oakland, California, and Rachel M. Hayes of Nashville, Tennessee,
and by his grandchildren Diego Enriquez, Johanna Hartman, Sarah Hartman, and
Rylan Hayes. His children and grandchildren were all with him on the day he
died.

As a scientist, Hayesıs work on organic isotopes and reconstruction of
ancient conditions provided evidence of the development of the carbon cycle
over geologic time, the timing of evolutionary events such as the
development of photosynthesis, and the development of the global
environment. He performed field work around the globe, including on the R/V
Atlantis and in the submersible Alvin, and in Western Australia, South
Africa, and the Canadian Arctic. He was a member of the American Geophysical
Union, the American Society for Mass Spectrometry, and the European
Association of Organic Geochemists. He authored two textbooks, four book
chapters, and nearly 200 papers, and mentored students and assisted
colleagues in countless ways. Hayes was elected a member of the National
Academy of Sciences and a fellow of the American Academy of Arts and
Sciences in 1998, and a Foreign Member of the Royal Society in 2016. Hayes
served as a Captain in the United States Army from 1967-1968, detailed to
the NASA Ames Research Center in Mountain View, California.

John and Janice Hayes were enthusiastic travelers throughout their lives,
always willing to detour for, or plan a trip around, good restaurants and
fine wine. He was an experienced photographer, a flutist and lover of
classical music, and a baker who made six loaves of bread nearly every
weekend his children were growing up. In Berkeley, he was a member of the
Epworth United Methodist Church and the Berkeley Camera Club. He had an
unpretentious approach to life in and out of the laboratory; ³look for the
good in people² was his bedrock philosophy. As he rejoins the carbon cycle,
he would like to remind us all to take action to combat global climate
change.