- 地球化学 (ISSN:03864073)
- vol.26, no.1, pp.25-39, 1992-09-24 (Released:2016-12-09)
The purpose of this report is to compile the most recent data of trace element concentrations and distributions in seawater as of 1991. The geochemical and oceanographical factors controlling their oceanic distributions are not described in detail here, so that the readers, if necessary, should refer to the original references. Since the excellent articles of Bruland (1983), Broecker and Peng (1982) and Quinby-Hunt and Turekian (1983) have appeared in the early 1980's, there has been a continued quantum leap in our knowledge of trace element concentrations in the ocean, and we are now approaching to the final stage in the game of filling up the periodic table of oceanic distribution. Summarizing the results, (1) there is no data for Rh and Os, and the only upper limits can be placed for Ta, Rh and In, (2) data for Y, Zr, Hf, Nb, Re, In, and Sn are so few that further confirmation is needed for their oceanographic consistency, (3) the distributions of Al, Pb, Bi, Te, Mn, Co, Ti, Cu, and Ga are strongly influenced by scavenging, and some evidences are available for bottom regeneration of trace metals like Al, Cu, Ti, Ga etc., and (4) more than 30 elements are correlated with nutrients such as reactive phosphate, nitrate and silicate. It is hoped that within the 20th century, all the elements in the periodic table may be accurately determined by improved techiques, and thereby the new field of chemical tracer oceanography will be opened up for the next century.