摘要
本文论述了近代黄河三角洲沉积物的数量特征、粒度特征及共分布、结构与构造特征,认为:1.各期亚三角洲的淤积厚度、速率和陆地淤积率都与亚三角洲的建造历时及废止方式有关,淤积厚度有共最大限度;2.沉积颗粒均细于0.25mm级,粉砂粘土占优势,无推移质段。Mz(φ)值与δ_f成正比,与Kg成反比;3.沉积构造与沉积水动力及颗粒大小有关,沉积物的分布与结构反映了三角洲建造的基本特征。
This article studies the quantity, grain size, and distribution characteristics of the deltaic sedimentary, also sedimentary structure and construction of the delta. The following conclusions are obtained.( 1 ) In every sub-deltaic construction, the thickness, velocity and land sedimentary ration are in relation to their living time and abandoned pattern. There is a maximum in every sub-deltaic sedimentary.( 2 ) The coarsest grained-grad is 0.25mm, and principal composition is salt sand and clay.There is nonrolling components of sedimentary.( 3 ) The sedimentary structures are in relation to the hydrodynamics and grain size of sediments. The distribution and construction of the deltaic sedimentary is a reflection of the characters of the deltaic development.
出处
《地理研究》
CSSCI
CSCD
北大核心
1989年第4期45-55,共11页
Geographical Research
基金
中国科学院地球研究所所长基金资助项目
关键词
沉积物
黄河
三角洲
Sedimentary charcteristics, Yellow River Delta
