Dear colleagues, The Geochemistry Division of the American Chemical Society (ACS) invites nominations for the 14th awarding of the Geochemistry Medal. Awarded biennially, the Geochemistry Division Medal recognizes an individual for outstanding accomplishments in any field of geochemistry. Nomination materials must be submitted by 5:00 pm ET on May 30, 2026 to the Chair of the Geochemistry Medal Committee: Dr. Yuanzhi Tang; yuanzhi.tang@eas.gatech.edu<mailto:yuanzhi.tang@eas.gatech.edu>. Nomination Package Requirements * A nomination letter (approximately 2–5 pages) describing the nominee’s qualifications and contributions * The nominee’s current CV, including an up-to-date publication list * Two supporting letters from individuals other than the nominator * Any additional supporting materials at the discretion of the nominator Nominators should confirm prior to submission that the nominee is willing to be considered for the award. Evaluation Criteria Nomination packages should clearly address the following criteria: * Impact on subdiscipline(s), field(s), and society, including seminal contributions, highly cited work, or the establishment of new research directions * Knowledge production, such as publications, citation metrics, books, patents, or inventions * Interdisciplinarity and reach, including influence across disciplines or fields * Mentoring, including the career trajectories, productivity, and placement of students and postdoctoral scholars * Leadership and service, including contributions to professional societies and institutional leadership (e.g., departments, universities, national laboratories) * Contributions to inclusion, such as efforts to recruit and retain Black, Indigenous, and People of Color (BIPOC), and broader engagement in diversity, equity, and inclusion activities As you consider potential nominees, we strongly encourage attention to broad representation, including gender diversity and participation of BIPOC scholars. Research consistently shows that women and BIPOC scientists are more likely to be overlooked for awards and may be less likely to self-identify as ready for nomination for prestigious honors. Award Details The Geochemistry Medal includes: * A bronze medallion * A $2,000 honorarium * An allowance for travel and registration to attend the ACS meeting at which the award is presented The 2027 Geochemistry Medal will be conferred at the Spring 2027 ACS National Meeting & Exposition, to be held March 21–25, 2027, in New Orleans, Louisiana. Nominees are considered for two award cycles. Unsuccessful nominations from the 2027 cycle will automatically be reconsidered in the subsequent cycle, and nominators will be invited to submit updated or additional material if desired. Previous GEOC medal winners include: * Frank J. Millero (2001) * John M. Hayes (2003) * Patrick G. Hatcher (2005) * Robert C. Aller (2007) * Fred T. MacKenzie (2009) * John A. Tossell (2011) * George W. Luther III (2013) * Donald Sparks (2015) * Susan L. Brantley (2017) * Everett L. Shock (2019) * Michael Hochella (2021) * Vicki Grassian (2023) * Janet Hering (2025) Thank you for your efforts in recognizing and celebrating our colleagues’ outstanding contributions to the field of geochemistry. Yuanzhi Tang Chair, Geochemistry Medal Committee American Chemical Society Geochemistry Division ------------- Yuanzhi Tang (she/her) (pronounce my name<https://namedrop.io/yuanzhitang>) Georgia Power Professor School of Earth and Atmospheric Sciences School of Civil and Environmental Engineering Director, Center for Critical Mineral Solutions Associate Director, Strategic Partnership and Engagement, Brook Byers Institute for Sustainable Systems Georgia Institute of Technology Co-Editor-in-Chief, Chemical Geology Phone: 631-903-0274 (mobile) Email: yuanzhi.tang@eas.gatech.edu Website: https://tang.eas.gatech.edu<https://tang.eas.gatech.edu/>