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SUMMARY:Mountains to Deserts: Insights from Garnet - Dr Anna Bird (Univers
 ity of Hull)
DTSTART:20160118T170000Z
DTEND:20160118T180000Z
UID:TALK62371@talks.cam.ac.uk
CONTACT:Matouš Ptáček
DESCRIPTION:Garnet is one of the most useful and versatile minerals it is 
 possible to analyse.  It usually forms in a wide variety of metamorphic ro
 cks and some igneous rocks where its pressure and temperature of growth is
  pretty well understood.  Therefore its stability relationships are genera
 lly well constrained allowing for good interpretation of geochronological 
 and geochemical data obtained.  Geochronology of garnets is particularly u
 seful for Sm-Nd and Lu-Hf because garnet has high 147Sm/144Nd and 176Lu/17
 7Hf ratios.  Dating garnets can give insight into when metamorphic events 
 occur and are useful for poly-metamorphic terranes as the garnet porphyrob
 last phase can generally be related to deformation fabrics.  Garnet geoche
 mistry is also the most widely used mineral-chemistry tool for establishin
 g sediment provenance.  It is a common part of heavy mineral assemblages\,
  it shows a wide range in compositions\, and it’s a relatively stable mi
 neral under both weathering and burial diagenetic conditions.\n\nThis talk
  will cover two applications of garnet\, first in a metamorphic setting lo
 oking at the timing of metamorphic events giving insights on mountain buil
 ding processes in the Northern Highlands of Scotland. The second uses garn
 et as a provenance tool of the dust making up the Chinese Loess Plateau.  
 \n
LOCATION:Harker Room 1\, Department of Earth Sciences
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