The role of fractional crystallization, magma recharge, and magma mixing in the differentiation of the Small Hasandag volcano, Central Anatolia, Turkey

Interpretation of the provenance of small‐scale heterogeneity as documented in a single eruptive unit from Mt. Jefferson, Central Oregon Cascades

“…These mixtures typically are expressed as large‐scale heterogeneity between diverse lava compositions erupted at typical volcanoes [e.g., Conrey et al ., ], but volcanic processes can also promote efficient mixing with heterogeneity only preserved at a microscale through phenocryst diversity [e.g., Kent et al ., ]. Magma evolution processes in arc settings are recognized to occur and include a combination of magma mixing, crustal melting, fractional crystallization, crystallization triggered by the loss of volatiles, and recharge with mafic magma [ Dufek and Bergantz , ; Eichelberger , ; Ustunisik and Kilinc , ; Ustunisik et al ., ]. However, studies rarely attempt to simultaneously understand the processes leading to both small scale (centimeter to meter within a unit) and large scale (m to km within a range of lavas erupted from a major center) heterogeneity.…”