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首页> 外文期刊>Journal of oceanography >Dissolved and Labile Particulate Zr, Hf, Nb, Ta, Mo and W in the Western North Pacific Ocean
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Dissolved and Labile Particulate Zr, Hf, Nb, Ta, Mo and W in the Western North Pacific Ocean

机译:北太平洋西部溶解且不稳定的Zr,Hf,Nb,Ta,Mo和W颗粒

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Dissolved and labile particulate Zr, Hf, Nb, Ta, Mo and W were determined at stations K1 (51°N, 165°E), K2 (47°N, 160°E), KNOT (44°N, 155°E) and 35N (35°N, 160°E) in the western North Pacific Ocean. A portion of seawater for dissolved species (D) was passed through a 0.2 μm Nuclepore filter and acidified to pH 2.2 with HCl and HF. A portion of seawater for acid-dissolvable species (AD) was acidified without filtration. Labile particulate (LP) species is defined as AD minus D, which represents a chemically labile fraction of particulate species. D-Zr, Hf and Ta increase with depth, Nb shows a slight depletion in surface water, whereas Mo and W have a conservative vertical profile. The concentration range of D-Zr, Hf, Nb, Ta and W is 31-275, 0.14-0.95, 4.0-7.2, 0.08-0.29 and 40-51 pmol kg~(-1), respectively, whereas that of Mo is 97-105 nmol kg~(-1). LP-species of Zr, Hf and Ta account for 10-14% of AD in average and increase up to 25% below 4000 m, whereas those for Mo and W are negligible. In contrast, LP-Nb shows maxima (up to 27%) in surface water. We also found that D-Zr/Hf, Nb/Ta and Mo/W mole ratios generally increase in the order continental crust < river water < coastal sea < open ocean.
机译:在站点K1(51°N,165°E),K2(47°N,160°E),KNOT(44°N,155°E)处确定了溶解且不稳定的Zr,Hf,Nb,Ta,Mo和W颗粒)和北太平洋西部的35N(35°N,160°E)。将一部分用于溶解物质(D)的海水通过0.2μm的Nuclepore过滤器,并用HCl和HF酸化至pH 2.2。将一部分用于酸溶性物种(AD)的海水酸化,无需过滤。不稳定的颗粒(LP)物种定义为AD减去D,代表颗粒物种的化学不稳定部分。 D-Zr,Hf和Ta随着深度增加,Nb在地表水中略有消耗,而Mo和W具有保守的垂直剖面。 D-Zr,Hf,Nb,Ta和W的浓度范围分别为31-275、0.14-0.95、4.0-7.2、0.08-0.29和40-51 pmol kg〜(-1),而Mo的浓度范围为97-105nmol kg·(-1)。 Zr,Hf和Ta的LP种类平均占AD的10-14%,在4000 m以下最多增加25%,而Mo和W的种类可忽略不计。相反,LP-Nb在地表水中显示最大值(最高27%)。我们还发现,D-Zr / Hf,Nb / Ta和Mo / W摩尔比通常按陆壳<河水<沿海海<远洋的顺序增加。

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