Understanding Re–Os systematics and model ages in metamorphosed Archean ultramafic rocks: A single mineral to whole-rock investigation
作者： Judith A. Coggon , Ambre Luguet , Raúl O.C. Fonseca , Jean-Pierre Lorand , Alexander Heuser
DOI: 10.1016/J.GCA.2015.07.025
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摘要: Abstract 187 Rhenium–187 Os model ages are used to infer the timing of crust-mantle differentiation events and evolution of lithospheric mantle. However, ancient samples often have long and complex histories of metamorphism, metasomatism and deformation that may be problematic if these processes caused disturbance the Re–Os system. Such processes have been shown to disturb the Re–Os systematics of ophiolitic chromitites, but the effect on stratiform chromitites has not previously been investigated. Here we present a detailed …
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