Tracing the Magmatic to Hydrothermal Evolution of the Mount Rosa Complex, Colorado: Textural and Chemical Evidence Using Zircon
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Located ~15 km west of the city of Colorado Springs, the ~1.04 Ga Mount Rosa Complex (MRC) consists of a diverse groups of peraluminous to peralkaline granitic rocks hosted in the ~1.08 Ga Pikes Peak Batholith. From oldest to youngest, the MRC comprises the following rock units: the peraluminous Pikes Peak biotite granite (PPG), fayalite-bearing quartz syenite, granitic dikes, peralkaline Na-amphibole Mount Rosa granite (MRG), mafic dikes, and type-(I) and type-(II) NYF-type pegmatites. All rock units in the MRC are highly elevated in REEs and HFSEs compared to other A-type magmatic systems. In ...