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Dissolved niobium and tantalum in the North Pacific
Author(s) -
Sohrin Yoshiki,
Fujishima Yukiyo,
Ueda Kazumasa,
Akiyama Shoji,
Mori Koji,
Hasegawa Hiroshi,
Matsui Masakazu
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl00646
Subject(s) - tantalum , seawater , niobium , oceanography , geology , surface water , mineralogy , materials science , metallurgy , environmental science , environmental engineering
Niobium and tantalum were measured in North Pacific seawater. The concentration of Nb shows a slight depletion in surface water and that of Ta shows a slight increase near the bottom. The mean concentrations of Nb in surface and deep Pacific water are 3.0 and 3.8 pmol/kg, respectively, and for Ta, 0.08 and 0.20 pmol/kg. Their relatively uniform distribution suggests that Nb and Ta are less reactive with particles in seawater than Zr and Hf. In analogy with V, the species of Nb and Ta may be oxyacids rather than hydroxides.