BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
DTSTART:20260524T110000
DTEND:20260524T120000
SUMMARY:Stable Sr Isotopes in Gypsum: From the Oceanic Sr Budget to Carbonate Weathering
DESCRIPTION:<p>Stable strontium isotopes δ88/86Sr) are increasingly used to study the modern marine Sr budget and changes in the marine carbonate</p><p>factory over geological time. Both are linked to the long-term carbon</p><p>cycle through processes such as continental weathering,</p><p>hydrothermal alteration of oceanic crust, and carbonate burial.</p><p>This seminar focuses on the role of the common evaporite minerals</p><p>gypsum (CaSO4·2H2O) and anhydrite (CaSO4) in the stable Sr</p><p>isotope budget of the ocean. I will address three main questions:</p><p>(1) Does large-scale evaporite deposition, such as during the</p><p>Messinian Salinity Crisis, affect the stable Sr isotope composition of</p><p>seawater? (2) Does dissolution of ancient gypsum and anhydrite</p><p>affect the δ88/86Sr value of rivers? And (3), can the δ88/86Sr value of</p><p>ancient seawater be reconstructed from gypsum and anhydrite?</p><p>Finally, I will present ongoing work that builds on these studies and</p><p>aims to quantify atmospheric CO2 consumption by carbonate</p><p>weathering in river catchments using stable Sr isotopes.</p>
LOCATION:
TRANSP:OPAQUE
URL:https://www.weizmann.ac.il/EPS/events
END:VEVENT
END:VCALENDAR