BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//UM//UM*Events//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Detroit
TZURL:http://tzurl.org/zoneinfo/America/Detroit
X-LIC-LOCATION:America/Detroit
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20070311T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20071104T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260209T131526
DTSTART;TZID=America/Detroit:20260225T100000
DTEND;TZID=America/Detroit:20260225T110000
SUMMARY:Lecture / Discussion:Yiruo Xu Dissertation Defense
DESCRIPTION:Understanding Earth’s tectonic processes is contingent on constraining their rates and durations. The timescale of metamorphism (i.e.\, for how long a rock is subjected to high pressure and temperature) is indicative of how heat and mass transfer during a tectonic event. During metamorphism\, compositional gradients form in minerals and are modified by chemical diffusion. Forward modeling of the extent of diffusion quantifies the time involved in the production and preservation of these gradients\, and thus proves to be a powerful tool for constraining metamorphic timescales (“diffusion chronometry”). However\, tectonic settings of different types and ages have not been evenly targeted for rigorous diffusion studies.\nThis thesis applies diffusion chronometry in garnet to various terranes and demonstrates its potential in addressing critical questions about Earth’s tectonics.\n\nThe first chapter reviews the significance of timescale constraints in the study of tectonics and introduces the fundamental principles of chemical diffusion in garnet. Chapters 2 and 3 evaluate the secular change of global metamorphic cooling rates over Earth’s history using two case studies of an Archean craton\, the Superior Province of North America. The Minnesota River Valley Subprovince is characterized by two neighboring crustal blocks that were metamorphosed contemporaneously to different grades by an advective heating event. They record strikingly different cooling rates that suggest greater complexities in the cooling histories of Precambrian orogens than commonly assumed. A comprehensive study of the Quetico\nSubprovince that contrasts diffusion chronometry with radiometric dating (“thermochronology”) further demonstrates the uncertainty and variability of Archean metamorphic cooling rates. The suggestion that the apparent increase in cooling rates globally\, since the Archean eon\, reflects fundamental tectonic changes should be evaluated with caution\, given the inherent limitations and biases of existing data. Chapter 4 presents the first application of\ndiffusion chronometry to constrain the timescales of material cycling deep in a subduction zone using complexly zoned garnet crystals from Jurassic subduction m´elanges of Cedros Island\, Baja California\, Mexico. The pressure–temperature–time evolution of the subducted blocks cannot be explained by large-scale distributed flow in the subduction channel\, as proposed in some numerical models. Instead\, the subducted materials experienced more complex circulation and rapid exhumation via focused return flow.
UID:145267-21896962@events.umich.edu
URL:https://events.umich.edu/event/145267
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Earth And Environmental Sciences
LOCATION:1100 North University Building - 2540
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260211T102201
DTSTART;TZID=America/Detroit:20260225T110000
DTEND;TZID=America/Detroit:20260225T120000
SUMMARY:Other:Engage Detroit Grant Live ($15\,000)
DESCRIPTION:Interested parties should apply through the website: https://engaged.umich.edu/engagement-detroit/detroit-workshops/\n\nOur Engaged Learning team is seeking proposals for the 2026 Engage Detroit Workshop grant program\, which supports small groups of U-M faculty and staff members organizing a workshop or a speaker series in Detroit. Please consider sharing this information with your faculty and staff who are interested in pursuing projects in Detroit. \n\nContinuing our commitment to partnerships with Detroit\, this grant provides up to $15\,000 in funding for workshops or speaker series that foster meaningful relationships and connections on a topic connecting faculty and staff at the University of Michigan with Detroit communities. The program has awarded 27 projects since its inception in 2022.\n\nIn collaboration with the Dearborn and Flint Provosts\, for 2026\, we are planning to support up to six proposals aimed at organizing a workshop or speaker series on a topic that is both relevant to Detroit communities and brings together multiple initiatives/projects led by UM faculty/staff. \n \nSubmissions are due by March 1\, 2026\; an overview of the program is available here. You can read more about the program in Monday’s Record article\, or at the Engaged Michigan website. You can also review active work by U-M faculty and staff in Detroit\, as reported in our 2025 census map.\n\nPlease direct any questions you may have about the program or application process to engagedmichigan@umich.edu.
UID:144249-21895019@events.umich.edu
URL:https://events.umich.edu/event/144249
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Personal Development,Nursing,pharmacy,Pre Med,Pre-Health,Pre-Law,Professional Development,Public Policy,Social Impact,Social Justice,Social Sciences,Sociology,Staff,Storytelling,Sustainability,Teaching,Undergraduate,Undergraduate Students,Health Professions,Community Engagement,Detroit,Faculty,Free,Graduate,Graduate and Professional Students,Graduate School,Graduate Students,Civic Engagement,History,In Person,Interdisciplinary,Leadership,Lifelong Learning,Literature,Medicine,Networking
LOCATION:Off Campus Location
CONTACT:
END:VEVENT
END:VCALENDAR