南黄海中部泥质区悬浮体颗粒组成及沉降  

Composition and Settling of Suspended Particles in the Muddy Area of the Central South Yellow Sea

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作  者:刘晶晶[1,2] 程鹏[1,2] 逄悦[1,2] 范德江[1,2,3] LIU Jingjing;CHENG Peng;PANG Yue;FAN Dejiang(Ocean University of China,Qingdao 266100,China;Key Lab of Submarine Geosciences and Prospecting Techniques,MOE,China,Qingdao 266100,China;Pilot National Laboratory for Marine Science and Technology(Qingdao),Laboratory for Marine Geology,Qingdao 266061,China)

机构地区:[1]中国海洋大学,山东青岛266100 [2]海底科学和探测技术教育部重点实验室,山东青岛266100 [3]青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室,山东青岛266061

出  处:《海洋科学进展》2023年第2期233-245,共13页Advances in Marine Science

基  金:国家自然科学基金项目(42176077)。

摘  要:联合使用扫描电镜(SEM)和能量色散X射线光谱仪(EDX)的技术手段,对2012年春季采集的南黄海中部泥质区的悬浮体样品进行悬浮体颗粒结构和组成的系统观察,揭示研究区悬浮体类型、特征及空间分布,并首次发现了高温燃烧颗粒。结果表明:研究区悬浮体颗粒类型多样,包括碎屑矿物、自生矿物、生物碎屑、高温燃烧颗粒等单颗粒类型,其中高温燃烧颗粒以硅质或者铁质规则球状颗粒出现;同时发现了有机包膜体、矿物质絮团、矿物-生物碎屑絮团、矿物-有机包膜絮团以及矿物-生物碎屑-有机包膜复合絮团等絮团类型颗粒。实测结果表明,悬浮体颗粒粒径范围为0~500μm,主体集中在0~20μm,平均粒径为7.84μm,不同类型悬浮体粒径差别显著,其级配符合对数正态分布。该区悬浮体颗粒在水体中以递变悬浮方式搬运,能较长时间保留在水体之中。Combined use of Scanning Electron Microscopy(SEM)and Energy Dispersive X-ray Spectrometer(EDX)technology,the structure and composition of suspended particles collected in the spring of 2012 in the muddy area of middle South Yellow Sea were systematically observed.The types,characteristics and spatial distribution of suspended particles in the study area were revealed,and high temperature burning particles were discovered for the first time.The results showed that there were various types of suspended particles in the study area,including detrital mineral,authigenic minerals,bioclasts and high temperature combustion particles,among which the high temperature combustion particles are siliceous or iron regular spherical particles.At the same time,organic coating,mineral floc,mineral-bioclastic floc,mineral-organic coating floc,mineral-bioclastic-organic coating composite floc and other floc particles appeared.The measured results indicated that the particle size ranged from 0 to 500μm,the main bodies were concentrated between 0 to 20μm,and the average particle size was 7.84μm.The particle sizes of different suspension types were significantly different,and their gradations conformed to the logarithmic normal distribution.The suspended particles in this area can be transported in the water bodies in a gradual suspension manner and can remain in water for a long time.

关 键 词:南黄海泥质区 悬浮体颗粒 高温燃烧颗粒 粒级级配 

分 类 号:P736.4[天文地球—海洋地质]

 

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