The evolution of zircon during low-P partial melting of metapelitic rocks: theoretical predictions and a case study from Mt Stafford, central Australia

Autor:	Nathan R. Daczko, E. Dunkley, Geoffrey L. Clarke, Wei Rz Wang
Rok vydání:	2014
Předmět:	Metamorphic rock Partial melting Geochemistry Metamorphism Geology engineering.material Migmatite Silicate chemistry.chemical_compound chemistry Geochemistry and Petrology engineering Plagioclase Biotite Zircon
Zdroj:	Journal of Metamorphic Geology. 32:791-808
ISSN:	0263-4929
DOI:	10.1111/jmg.12091
Popis:	Palaeoproterozoic metasedimentary migmatite reflects the highest temperature parts of a regional aureole at Mt Stafford, central Australia, comprising rocks that experienced 500–800 °C at ≈3 kbar. Whole-rock major element concentrations are correlated with Zr content, psammitic compositions having nearly twice the Zr content of pelitic compositions. Zirconium is concentrated in mesosome compared with leucosome. Zircon is largely detrital, mostly lacking any overgrowth contemporary with migmatite formation. Comparatively small proportions of micro-zircon (
Databáze:	OpenAIRE
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