A high-temperature hydrothermal deposit on the East Pacific Rise near 7°N

Details A high-temperature hydrothermal deposit on the East Pacific Rise near 7°N A high-temperature hydrothermal deposit on the East Pacific Rise near 7°N

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..70..249b&link_type=abstract

Earth and Planetary Science Letters, Volume 70, Issue 2, p. 249-259.

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Scientific paper

A SEABEAM survey of the East Pacific Rise (EPR) led to the selection of several sites having structural characteristics favorable for hydrothermal activity. Dredging of such an area located at 7°N on the EPR resulted in the recovery of sulfides, oxides and fresh basalt. Chemical analyses and isotopic compositions showed that the recovered pyrites were probably precipitated directly from hot vent hydrothermal waters. Chemical analyses and isotopic composition of manganese-iron oxides indicated that they too were of hydrothermal origin. 210Pb/Pb measurements yielded ages of 90 +/- 10 years for the deposits. This site may still be undergoing hydrothermal activity.

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