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

Geochronometria

G. Cherkashov¹  V. Bel’Tenev²  L. Lazareva²  F. Maksimov³  V. Kuznetsov³  A. Zheleznov³ 

[1] Institute for Geology and Mineral Resources of the Ocean (VNIIOkeangeologia);Polar Marine Geosurvey Expedition;St. Petersburg State University

关键词: 230Th\/U dating;    hydrothermal activity;    ore formation;    massive sulfide;    geochronology;   

DOI  :  10.2478/s13386-011-0001-1

学科分类：社会科学、人文和艺术（综合）

来源: Politechnika Slaska * Instytut Fizyki

【 摘 要 】

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.

【 授权许可】

Unknown