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زمینشناسی و معدن::
ماگمایی
(i) major tectonic, sedimentary and magmatic cycles affecting the Earth system since its early evolutionary stages and (ii) late
Fig. 4 (A) Microscopic morphology of the oldest known detrital zircon grain yielding multiple and consistent magmatic ages (left side).
the right side depicts the Secondary Ion Mass Spectrometry (SIMS) ages obtained from pits in both the magmatic core and metamorphic rim (left image).
zircons were derived from relatively low temperature and residual magmatic sources, representing the record of an early proto-crust
containing magmatically differentiated domains.
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