As a result of LA ICP MS analysis of sulfides of the Semenov-2 hydrothermal field, it is established that covellite, which replaces Zn sulfides, is enriched in most trace elements. The Ga, Ni, and In contents in it do not vary, whereas Mn, Co, and Cd are lower than in sphalerite. The distribution of trace elements in covellite, which replaces Cu–Fe sulfides, is distinct: it is enriched in Cd, Sb, Pb, and Bi, whereas the contents of other elements are either lower or invariant. Covellite, which replaces Zn sulfides, is enriched in all trace elements relative to that replacing Cu–Fe sulfides. Enrichment of covellite in trace elements relative to primary sulfides was favored by oxidation of the hydrothermal fluid by seawater, which is similar to the processes of submarine oxidation of ancient massive sulfide deposits. Covellite is also a host to invisible gold and silver in ores of the Semenov-2 field along with toxic elements such as As, Se, Te, Tl, and Cd.

Item Type:	Refereed Article
Keywords:	mid-Atlantic ridge, Atlantic Ocean, LA ICP MS, sulfides, Semenov-2 hydrothermal field, covellite
Research Division:	Earth Sciences
Research Group:	Geology
Research Field:	Tectonics
Objective Division:	Expanding Knowledge
Objective Group:	Expanding Knowledge
Objective Field:	Expanding Knowledge in the Earth Sciences
Author:	Danyushevsky, LV (Professor Leonid Danyushevsky)
Author:	Large, R (Professor Ross Large)
ID Code:	126963
Year Published:	2017
Web of Science® Times Cited:	1
Deposited By:	CODES ARC
Deposited On:	2018-07-04
Last Modified:	2018-08-16
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