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Plio-Pleistocene acidic volcanism of the northeastern part of the Armenian highland is related to a continental collision zone as a result of convergence between Eurasia and Arabia lithosphere plates. The development of volcanism is divided into three stages of 10–17, 4.5–7.5 and 0.1–2.8Ma. A crustal origin model is proposed to explain the geochemical and petrogenetic aspects of the acidic volcanism...
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