东海内陆架泥质区沉积物生物硅分布及其影响因素  

Distribution of Sedimentary Biogenic Silica in the Muddy Area of Inner Continental Shelf of the East China Sea and Its Influence Factors

作　　者：刘升发[1,2] 刘焱光[1,2] 于永贵[1,2] 刘明[3] 石学法[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061 [3]中国海洋大学,山东青岛266100

出　　处：《海洋科学进展》2014年第1期50-58,共9页Advances in Marine Science

基　　金：我国近海海洋综合调查与评价专项课题--CJ12区块海底底质调查与研究(908-01-CJ12);我国近海海洋底质调查研究(908-ZC-I-05);国家自然科学基金--东海周边中小型河流物源端元识别及其对内陆架泥质体形成的贡献(41106063);中国博士后科学基金--东海内陆架泥质体现代沉积物物源研究(20100481304);国家海洋局青年海洋科学基金--东海周边河流沉积物Sr-Nd同位素组成及其物源示踪意义(2013310)

摘　　要：采用连续提取方法对东海内陆架泥质区表层沉积物进行了生物硅测定，得出研究区生物硅空间分布特征。结果表明，受中国东部海域低硅质骨骼供给量及高溶解作用的沉积背景的控制，沉积物中生物硅质量分数为0．66％～1．26％，平均值为0．95％，整体上属于低值海区。生物硅的空间分布上不均一，呈明显的分带性，可能主要受研究区特定流系格局控制下的陆源碎屑物质冲淡作用影响。另外，生物硅与沉积物中有机质正相关，而与沉积物粒度组成相关性不明显。Using sequential extraction method, the content of biogenic silica is determined in the suriace sediments from the muddy area of the inner shelf of the East China Sea. The results indicate that the bio-genic silica content in the sediments ranges from 0.66% to 1.26%, with an average of 0. 95%, so that the whole study area belongs to a low area of biogenic silica. This is mainly due to a low supply of silicious re-mains and a high dissolution of silica. The spatial distribution of biogenic silica is not consistent and shows a distinct zonation in the study area, which may be chiefly influenced by the dilution of terrigenous clastic material controlled by the current pattern in the area. In addition, the biogenic silica content is closely cor-related to the TOC in the sediments, but not clearly to the grain size composition of the sediments.

关 键 词：生物硅 泥质区 东海内陆架 沉积物 

分 类 号：P736.2[天文地球—海洋地质]