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DTSTAMP:20250827T105843
DTSTART;TZID=America/Detroit:20250905T153000
DTEND;TZID=America/Detroit:20250905T163000
SUMMARY:Lecture / Discussion:Smith Lecture: Junjie Dong
DESCRIPTION:Water is fundamental to the Earth’s surface environment. Volcanic outgassing and subduction recycling connect the deep interior with the atmosphere and oceans\, shaping the planet’s long-term habitability. Surface oceans and mantle water are not separate reservoirs\; they are inherently linked to the planet’s thermal and redox evolution.\n\nIn this talk\, I will trace the storage and distribution of water in the mantle. Our earlier work showed that the capacity of the mantle to hold water depends strongly on temperature. A hotter Archean mantle could have held less water than the mantle actually contains today\, suggesting that Earth's early surface might have been covered by larger oceans. The interplay between mantle cooling\, water cycling\, and sea-level stability highlights the importance of the mantle as a dynamic water reservoir. More recently\, we examined how the disproportionation of iron in silicate minerals further regulates mantle water distribution. As the mantle becomes increasingly reduced with depth\, metallic iron stabilizes and reacts with structural water in nominally anhydrous minerals\, producing reduced hydrogen species such as molten FeHx or fluid H₂. This water–iron reaction prevents hydration of mantle silicates and drives hydrogen into metal-rich reservoirs\, thereby altering the form and location of water in the mantle.\n\nTogether\, this research provides a framework for understanding how much water the mantle can store and where it resides. The results suggest that the coevolution of water with Earth’s thermal and redox states governs its deep storage\, distribution\, and cycling\, and\, by extension\, ocean volume\, atmospheric composition\, and the long-term redox evolution of the planet.
UID:138242-21882661@events.umich.edu
URL:https://events.umich.edu/event/138242
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Earth And Environmental Sciences
LOCATION:1100 North University Building - 2540
CONTACT:
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DTSTAMP:20250729T095456
DTSTART;TZID=America/Detroit:20250905T160000
DTEND;TZID=America/Detroit:20250905T170000
SUMMARY:Workshop / Seminar:NERS Colloquium
DESCRIPTION:The NERS Colloquium Series invites leading researchers\, industry experts\, and thought leaders from across the nuclear engineering and radiological sciences community to share their insights with students\, faculty\, and guests. Covering a wide range of topics—from cutting-edge research and emerging technologies to policy\, education\, and professional development—the weekly talks offer an opportunity to explore current issues and innovations shaping the future of the field.
UID:136751-21879081@events.umich.edu
URL:https://events.umich.edu/event/136751
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Career,Energy,Industry Session,Michigan Engineering,Nuclear Engineering and Radiological Sciences
LOCATION:Industrial and Operations Engineering Building - IOE 1610
CONTACT:
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