Hal Helgeson

{{Short description|American geochemist (1932–2007)}} {{Infobox scientist | honorific_prefix = | name = Hal Helgeson | honorific_suffix = | native_name = | native_name_lang = | image =  | image_size = | image_upright = | alt = | caption = | birth_name = Harold C. Helgeson | birth_date = {{birth date |1931|11|13}} | birth_place = Minneapolis, Minnesota, U.S. | death_date = {{death date and age |2007|05|28 |1931|11|13}} | death_place = Berkeley, California, U.S. | death_cause = | resting_place = | resting_place_coordinates =  | other_names = | siglum = | pronounce = | citizenship =  | nationality =  | fields = Geochemistry | workplaces = Northwestern University<br>University of California, Berkeley | patrons = | education = Michigan State University (BS)<br>Harvard University (PhD) | alma_mater = | thesis_title = | thesis_url =  | thesis_year = | doctoral_advisor = Robert M. Garrels | academic_advisors = | doctoral_students = Everett Shock | notable_students = | known_for = | influences = | influenced = | awards = Urey Medal<br>V. M. Goldschmidt Award | author_abbrev_bot = | author_abbrev_zoo = | spouse =  | partner =  | children = | parents = | father = | mother = | relatives = | signature =  | signature_alt = | website =  | footnotes = | module = {{Infobox military person |embed=yes |name= |birth_date= |birth_place= |death_date= |death_place= |burial_place= |burial_label= |image= |caption= |allegiance={{Flag|United States}} |branch={{air force|United States}} |branch_label= Branch |service_years= 1954–1956 |rank= |commands= |unit=497th Reconnaissance Technical Squadron |battles= |awards= |relations= |other_work= }} }}

'''Harold C. Helgeson''' (November 13, 1931 – May 28, 2007) was an American scientist and educator. A pioneering theoretical geochemist, he was a professor at the University of California, Berkeley.<ref name="berkeley">{{cite news|author=Sanders, Robert|title=Geochemist Harold Helgeson has died at 75|date=11 June 2007|newspaper=UC Berkeley News|url=http://www.berkeley.edu/news/media/releases/2007/06/11_helgeson.shtml}}</ref>

==Early life== Born in Minneapolis, Minnesota, he grew up in St. Paul. He received a B.S. in geology at Michigan State University in 1953. Helgeson went to Harvard University for graduate school, supervised by Robert M. Garrels. Helgeson received his Ph.D. in 1962.<ref name="berkeley"/>

==References== {{Reflist}}

==Further reading== * Schulte, Mitch (2000). A conversation with Harold Helgeson. The Geochemical News, January 2000. * Shock, Everett L. and Jan P. Amend (2001). A tribute to Hal Helgeson on his 70th birthday. Geochimica et Cosmochimica Acta, Vol. 65, page 3613. * Sverjensky, Dimitri A. (2007). [http://www.elementsmagazine.org/archives/e3_4/e3_4_dep_obituary.pdf Obituary]. Elements, August. * {{cite web | last=Grimes | first=Mike | title=Harold Helgeson Obituary (2007) | website=Legacy.com | date=2007-06-17 | url=https://www.legacy.com/us/obituaries/santacruzsentinel/name/harold-helgeson-obituary?id=24806432 | access-date=2025-04-06}}

{{DEFAULTSORT:Helgeson, Harold C.}} Category:American geochemists Category:1931 births Category:2007 deaths Category:University of California, Berkeley faculty Category:Scientists from Saint Paul, Minnesota Category:Harvard University alumni Category:Michigan State University alumni Category:Recipients of the V. M. Goldschmidt Award