Other
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2369m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 10, pp.2369-2378
Other
4
Scientific paper
Fourteen thousand years of hydrothermal deposition are recorded in a metalliferous sediment core recovered from the Trans-Atlantic Geotraverse (TAG) Hydrothermal Field on the Mid-Atlantic Ridge at 26°N. An estimated 26 to >96% of the sediment at this core site is hydrothermally derived as determined from the CaCO 3 , Al and Fe data. Layers of essentially pure vent precipitates contain <3% CaCO 3 and <0.5% Al, with high concentrations of Fe (43%), Cu (4.1%), Zn (1.2%), Mn (1.1%), V (480 ppm), Pb (175 ppm), Cd (32 ppm) and Hg (3.8 ppm). Sediment accumulation rates vary from ~ 1 to >30 g/cm 2 /1000 y throughout the core, a function of the intensity of hydrothermal inputs. Distinct hydrothermal events are recorded at 6000 and 8500 y B.P. in layers containing >90% vent-derived material. Vertical metal profiles and interelement relationships in the core result from variable deposition of oxides and sulfides, oxidation and dissolution of sulfide phases and scavenging of metals from seawater.
Metz Simone
Nelsen Terry A.
Trefry John H.
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