Sulfide precipitates at 21/sup 0/N on the East Pacific Rise: /sup 226/Ra, /sup 210/Pb and /sup 210/Po

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · Geophys. Res. Lett.; (United States)

DOI:https://doi.org/10.1029/GL007i009p00685· OSTI ID:6848837

Finkel, R C; Macdougall, J D; Chung, Y C

Sulfide samples collected by the deep submersible ALVIN from hydrothermal vents at 21/sup 0/N on the East Pacific Rise have extremely variable contents of uranium series nuclides. In samples we have analyzed, /sup 210/Pb and /sup 210/Po activities vary by more than an order of magnitude within the same vent. In two out of three samples measured /sup 210/Po activities are hgiher than the parent /sup 210/Pb activities. Consideration of /sup 210/Pb/Pb in particulate sulfide filtered from hot vent water indicates that the lead in these deposits has a basalt as opposed to a seawater origin. Comparison of /sup 210/Po and /sup 210/Pb contents of active and inactive vent particulates suggests that the cycle of buildup, cessation and decay by oxidation of these sulfide chimneys is measured in tens to a few hundreds of years.

• Research Organization: Scripps Institution of Oceanography, La Jolla, CA. 92093
• OSTI ID: 6848837
• Journal Information: Geophys. Res. Lett.; (United States), Journal Name: Geophys. Res. Lett.; (United States) Vol. 7:9; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580500* -- Oceanography-- (1980-1989)
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
CHEMISTRY
DAYS LIVING RADIOISOTOPES
EVEN-EVEN NUCLEI
FLUIDS
GEOCHEMISTRY
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
HEAVY NUCLEI
HYDROTHERMAL SYSTEMS
ISOTOPES
LEAD 210
LEAD ISOTOPES
NUCLEI
PACIFIC OCEAN
POLONIUM 210
POLONIUM ISOTOPES
RADIOISOTOPES
RADON 226
RADON ISOTOPES
SEA BED
SEAS
SULFIDES
SULFUR COMPOUNDS
SURFACE WATERS
YEARS LIVING RADIOISOTOPES