Geochemical and micropaleontological character of Deep-Sea sediments from the Northwestern Pacific near the Kuril-Kamchatka Trench

被引：22
|
作者：
Sattarova, Valentina V. [1 ]
Artemova, Antonina V. [1 ]
机构：
[1] Russian Acad Sci, Far Eastern Branch, VI Ilichev Pacific Oceanol Inst POI, Vladivostok 690041, Russia
来源：
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY | 2015年 / 111卷
基金：
俄罗斯基础研究基金会;
关键词：
Diatoms; Deep-sea sediments; Chemical composition; Kuril-Kamchatka Trench; Pacific Ocean; SURFACE SEDIMENTS; NORTH PACIFIC; OKHOTSK; DIATOMS; BARIUM; DISTRIBUTIONS; ELEMENTS; SILICA;
D O I：
10.1016/j.dsr2.2014.10.030
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
Sediments from the abyssal plain adjacent to the Kuril-Kamchatka Trench were collected during the German-Russian cruise for the Kuril Kamchatka Biodiversity Study, and the chemical composition, quantitative content, and species composition of collected diatoms were studied. The collected sediments are silt and clayey silt, the SiO2 (am), and C-org contents range 7.58-19.38% and 0.44-1.55%, respectively. The enrichment of silts by amorphous silica indicates the presence of a significant number of organisms (predominantly diatoms) with an opal skeleton. High C-org, content in sediments reflects biological productivity, which is controlled by factors such as water circulation and the distribution of nutrients. Interrelation trends among chemical constituents is investigated via multi-component statistics. Diatom assemblages reflect present-day water masses characterized by high nutrient content, surface water circulation, and sedimentation conditions for different parts of the study area. Analysis of this new data also highlights changes in the response of diatom flora due to abiotic factors. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：10 / 18
页数：9
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