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New experimental techniques for studying : (i) trace element substitution in minerals, and (ii) determining S-L-V relationships in silicate-H2O systems at high pressure

Tailby, Nicholas David

Description

Ti site occupancy in zircon (ZrSiO{u2074}) is fundamental to thermobarometry because substitution mechanisms control Ti content-temperature relations. Described here are the results of three independent methods used to demonstrate that Ti predominately substitutes for Si and not Zr in zircon. Zircons were synthesized from oxide powders held in a Na{u2082}WO{u2084} flux at 1 bar and 1,100-1,400 {u00B0}C. Fully buffered experiments run at 1,300 {u00B0}C show zircons equilibrated with rutile +...[Show more]

CollectionsOpen Access Theses
Type: Thesis (PhD)
URI: http://hdl.handle.net/1885/149676

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