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SUMMARY:The journey of volcanic crystals: the time lords of eruptive histo
 ry - Dr Chiara Maria Petrone (Natural History Museum London)
DTSTART:20260224T120000Z
DTEND:20260224T130000Z
UID:TALK242749@talks.cam.ac.uk
CONTACT:Carrie Soderman
DESCRIPTION:The crystal cargo of volcanic rocks is a heterogeneous assembl
 age of mineral populations of different origins and age ranges\, recording
  complex histories of their journey through the volcano plumbing system pr
 ior to eruption. Timescales of pre-eruptive magmatic processes can be unlo
 cked via elemental diffusion chronometry\, a powerful and widely used tool
  exploiting the element exchange within a chemically zoned crystal or with
 in a crystal and melt.\nDurations of pre-eruptive magmatic processes are q
 uite variable and are system dependent. Timescales of magma storage betwee
 n magma intrusion and eruption is relative short (from a few days to a few
  decades) for basaltic systems\, but much longer (decades to millennia) fo
 r silicic systems. The short timescales recorded by crystals from mafic an
 d intermediate volcanoes often match those recorded by monitoring signals 
 (e.g.\, gas\, seismicity\, deformation\, etc) and offer valuable informati
 on to inform volcano forecasting and hazards mitigation. Timescales of mag
 ma remobilisation and pre-existing crystals remobilisation\, retrieved fro
 m the internal portions of chemically zoned crystals\, provide information
  on the longevity of crystal mushes and are shedding new light particularl
 y on basaltic crystal mushes\, which may persist longer than previously hy
 pothesised.\nHere\, using recent examples from both terrestrial and extrat
 errestrial volcanoes\, I will discuss how diffusion chronometry provides f
 undamental time-constrained insights into pre-eruptive magma dynamics. I w
 ill also focus on the challenges we face to progress diffusion chronometry
 \, reducing uncertainties and favouring interdisciplinary approaches that 
 link diffusion chronometry to real-time volcano observations and isotope g
 eochemistry.  
LOCATION:Department of Earth Sciences\, Tilley Lecture Theatre
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