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Опубликовано 2011-01-28 На SciPeople2012-01-13 ЖурналGeochronometria

230 Th/U chronology of ore formation within the Semyenov hydrothermal district (13° 31′ N) at the Mid-Atlantic ridge

V. Kuznetsov, F. Maksimov, A. Zheleznov, G. Cherkashov, V. Bel’Tenev and L. Lazareva / Алексей Железнов

Аннотация

A radiochemical study was carried out on massive sulfides from Semyenov hydrothermal district at the Mid-Atlantic Ridge. New and published results provide evidence that 230Th/U ages obtained for massive sulfides are reliable. The sulfide deposits from the West, North-West, North-East, and East hydrothermal sites at the Semyenov hydrothermal district were formed between ∼124 ka and ∼37 ka ago. The hydrothermal activity might have started in the eastern part of the district and moved to the west by episodic ore formation.