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SUMMARY:A pinch of salt: Halogen cycling through the solid Earth  - Margar
 et Hartley\, University of Manchester
DTSTART:20230228T120000Z
DTEND:20230228T130000Z
UID:TALK176993@talks.cam.ac.uk
CONTACT:Oscar Branson
DESCRIPTION:The halogens are highly incompatible and fluid-mobile elements
 . They are most abundant in Earth surface reservoirs such as seawater and 
 ocean sediments\, and become concentrated in altered oceanic lithosphere t
 hrough serpentinization. Subduction of altered oceanic lithosphere causes 
 halogens to be recycled into the mantle\, from where they may be returned 
 to the surface through partial melting and magmatism at ocean islands. Thi
 s makes halogens potentially excellent tracers of recycled subducted litho
 logies in the Earth’s mantle. However\, our knowledge of the volatile co
 mposition of recycled mantle domains is limited by a lack of in situ sampl
 es of the downgoing lithospheric material. This talk will explore the geoc
 hemical cycling of halogens through subduction zones and into the deep man
 tle\, drawing on analytical studies of the Leka ophiolite complex\, the Re
 ykjanes Ridge\, and Iceland. 
LOCATION:Department of Earth Sciences\, Tilley Lecture Theatre
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