RESEARCH PAPER
230Th/U chronology of ore formation within the semyenov hydrothermal district (13°31′ N) at the Mid-Atlantic ridge
1
St. Petersburg State University, V.O., 10-th Line 33, 199178, St. Petersburg, Russia
2
Institute for Geology and Mineral Resources of the Ocean (VNIIOkeangeologia), Angliysky Prospect 1, 190121, St. Petersburg, Russia
3
Polar Marine Geosurvey Expedition, Pobedy Str. 24, 198412, Lomonosov, St. Petersburg, Russia
Online publication date: 2011-01-28
Publication date: 2011-03-01
Geochronometria 2011;38(1):72-76
KEYWORDS
ABSTRACT
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.
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| ISSN: | 1733-8387 |
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