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SUMMARY:Katie Cooper (Washington State University)
DTSTART:20201008T020000Z
DTEND:20201008T030000Z
DTSTAMP:20260416T221117Z
UID:RSES_school_seminar/21
DESCRIPTION:Title: Craton Stability: What’s Thickness (and shape) Got To Do Wi
th It.\nby Katie Cooper (Washington State University) as part of ANU R
esearch School of Earth Sciences school seminar\n\n\nAbstract\n\n<
img width=100% src="http://rses.anu.edu.au/files/20201008_RSES_seminar.jpg
" /> \n
Figure: Image of Depth to Lithosphere Asthenosphere Bound
ary in kilometers from Cooper et al.\, 2017. Shades of blue correspond dep
th with darker colors corresponding to deeper estimates of the lithosphere
asthenosphere boundary.
\n\n\nThick lithosphere is a fi
rst-order characteristic of cratons. Though\ndiscussions around craton st
ability primarily focus on buoyancy and\nrheology\, thickness also plays a
primary control on both the long-lived\nnature of of stable cratons and t
he demise of destroyed cratons. In\nother words\, craton stability is det
ermined\, in part\, by the material\nproperties of cratonic lithosphere\,
which set controls on composition\nand rheology\, its thermal structure\,
and its relative strength in\ncomparison to the material around it and the
mantle below. The\nintegrated strength of the cratonic lithosphere\, whi
ch determines its\nrelative stability\, depends on its thickness. Corresp
ondingly\, the\nshape of a craton (or how its thickness varies over a late
ral extent)\nshould also play a role in its overall stability. In this ta
lk\, I will\nsummarize the connections between craton thickness and (in)st
ability\,\nthe limits on craton thickness\, and the consequences of long-l
ived\,\nthick lithosphere. Finally\, I will present new work demonstratin
g the\nstability of cratons also depends on their shape.\n
LOCATION:https://researchseminars.org/talk/RSES_school_seminar/21/
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