Compositional change of settling particles with water depth in the Japan Sea
Compositional change of settling particles with water depth in the Japan Sea
复制标题
日本海沉降颗粒成分随水深的变化
DOI：
10.1016/0304-4203(89)90028-5
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发表时间：
1989
期刊：
影响因子：
3
通讯作者：
M. Koyama
中科院分区：
文献类型：
--
作者：
T. Masuzawa;S. Noriki;T. Kurosaki;S. Tsunogai;M. Koyama
1984年9月在日本海(北纬40°49.4‘，东经138°40.7’，水深3350 m)采集了5种不同水深(890~3240 m)的沉降物和一个箱形岩心样品，并对其主要组分和25种元素进行了分析。根据元素浓度(Me)和元素与铝的浓度比(Me/Al)在垂向上的变化可分为4种类型：(1)元素浓度随深度增加，Me/Al比值在垂向上基本不变(Al、Sc、La、Th、Hf、V、Ta、K、Rb、Cs)，(2)元素浓度和Me/Al比值随深度(I、Ba、Ca、Sr)减小，(3)元素浓度和Me/Al比值随深度(Mn)增加；元素浓度基本不变或随深度略有增加，Me/Al值随深度(As、Sb、Se、Ag)减小。这四种类型分别被命名为耐火型、生物型、清扫型和生物型清扫型；第四种类型在这里是首次发现。铁、钴、锌和溴在水体中具有最大的Me/Al比值，但被归类为清除(Fe和Co)和生物清除(锌和溴)元素。3240m处沉淀物中元素的浓度变化表明，除耐火型元素外，其他元素都在海底或附近再生或释放。
Settling particles at five different water depths (890–3240 m) and a box core sample were collected in September 1984 in the Japan Sea (40°49.4′N, 138°40.7′E; 3350 m deep), and analyzed for major components and 25 elements. According to the vertical changes in elemental concentrations (Me) and elemental concentration ratios to aluminum (Me/Al), these elements are grouped into four types: (1) the elemental concentration increases with water depth and the Me/Al ratio remains almost constant vertically (Al, Sc, La, Th, Hf, V, Ta, K, Rb, and Cs); (2) both the elemental concentration and the Me/Al ratio decrease with depth (I, Ba, Ca, Sr); (3) both the elemental concentration and the Me/Al ratio increase with depth (Mn); and (4) the elemental concentration remains almost constant or increases a little with depth and the Me/Al ratio decreases with depth (As, Sb, Se, and Ag). These four types are named refractory, biogenic, scavenged, and biogenic-scavenged, respectively; the fourth type is recognized here for the first time. Fe, Co, Zn, and Br show maximum Me/Al ratios within the water column but are grouped as scavenged (Fe and Co) and biogenic-scavenged (Zn and Br) elements. The concentration changes of elements in the settling particles at 3240 m relative to the surface sediment suggest that elements except those of the refractory type are regenerated or liberated on or near the sea floor.