Abstract
Abstract—Perovskite crystals from the ore-bearing olivinite and phoscorite of the Kugda massif were analyzed by LA-ICP-MS. Age obtained for the alkaline rocks of the Kugda massif is 257 ± 6 Ma. This implies that the Kugda massif was formed simultaneously with the Siberian flood basalts and Guli Massif (250 ± 9 Ma), which is the largest and highly differentiated pluton in the Maymecha–Kotuy Province. The simultaneous formation of the melilite-bearing Kugda Complex, Siberian flood basalts, and Guli Massif suggests the possible genetic relation of these rocks.
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