【摘要】：本文通過對南黃海北部B03孔沉積物黏土礦物組成、黏土粒級沉積物元素地球化學分析以及沉積速率研究,探討其物質來源及其環(huán)境變化記錄。研究認為,B03孔沉積物中黏土礦物組分以伊利石為主,同時含有較多蒙脫石,伊利石-蒙脫石-(高嶺石+綠泥石)判別圖解表明該巖芯源區(qū)主要來自黃河沉積物;B03孔黏土粒級沉積物稀土元素分布模式顯示,90cm以上的黏土粒級沉積物稀土元素球粒隕石標準化分布模式與黃河沉積物的較為接近,表明其與黃河沉積物的親緣性較大。結合B03孔的210Pb測年結果和稀土元素地球化學特征,推測1855年黃河改道對山東半島東部陸架海的物源影響是造成該巖芯以90cm為界分為上下兩段沉積的主要原因。
[Abstract]:In this paper, the mineral composition of clay, element geochemistry of clay grain-grade sediments and deposition rate of B03 pore sediments in the northern part of South Huang Hai are studied, and the source of material and the records of environmental changes are discussed. It is considered that the clay minerals in the sediments of pore B03 are mainly composed of Illite and contain more montmorillonite. Illite-montmorillonite-(kaolinite chlorite) discriminant diagram shows that the core source area is mainly from the Yellow River sediment B03 pore clay grain sediment REE distribution pattern shows that more than 90 cm of clay grain sediment REE The standardized distribution model of chondrites is close to that of the Yellow River sediments. It shows that it is related to the Yellow River sediment. Based on the 210Pb dating results of B03 well and the geochemical characteristics of rare earth elements, it is inferred that the influence of the Yellow River diversion on the continental shelf sea in the eastern Shandong Peninsula in 1855 is the main reason for the core to be divided into upper and lower sections with 90cm as the boundary.
【作者單位】： 中國海洋大學海底科學與探測技術教育部重點實驗室;中國海洋大學海洋地球科學學院;
【基金】：國家自然科學基金項目(41376053)資助~~
【分類號】：P736

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