1. Melange zones can provide information about shallow volatile transfer from subducting slab
Evidence from lithium and lithium isotopes traces fluid-rock interactions in high-grade metamorphic blocks.
Bebout, 2007
Filtering out Li inputs into subduction zone?

2. Small-scale retrograde alteration of rock reflected in Li isotopes – duration of flow event?
Blueschist alteration of eclogite
Eclogite
Blueschist
Altered omph
Chl after gar
Diffusion/dispersion
For K=0.10
De (m2/s)
10-12
10-15
time
2 days
3 years
b = 0.12