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DTSTAMP:20260904T175830Z
DTSTART:20250227T153000Z
SUMMARY:EES Departmental Seminar: White mica as a timekeeper of mountain building processes 
DESCRIPTION:Dr. Dawn Kellett\nResearch Scientist\nGeological Survey of Canada-Atlantic-NRCAN\nTitle: White mica as a timekeeper of mountain building processes \n\nAbstract: White mica\, common in continental rocks\, is a key mineral phase for studying tectonic processes because it is relatively weak and readily crystallizes/recrystallizes\, for example during deformation\, metamorphism and hydrothermal circulation. White mica also contains measurable amounts of the radioactive isotopes 40K and 87Rb\, allowing it to be widely-used as a geo- and thermochronometer. The challenge for the tectonics community is to robustly link age information determined from the K-Ar and Rb-Sr decay systems to specific processes such as cleavage formation\, shearing and metamorphism which are vital to reconstructing the tectonic history of Earth’s ancient mountain belts. In this talk I will discuss the principles\, state of knowledge and challenges for applying white mica as a reliable timekeeper of mountain building processes.\n\nAdditional Information: Meet the lecturer: COFFEE and COOKIES in B-3078 at 10:45 am 
LOCATION:LSC-B8007\, 8th floor of the Biology/EES wing of the Life Sciences Centre
URL:https://www.dal.ca/faculty/science/earth-environmental-sciences/news-events/2025/02/27/ees_departmental_seminar.html
UID:https://www.dal.ca/faculty/science/earth-environmental-sciences/news-events/2025/02/27/ees_departmental_seminar/_jcr_content/contentPar/dcalfacultyevent.html
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