摘要
珠江三角洲的现代沉积环境,主要是根据地形、地貌、水文动力条件、沉积特征、地球化学因素以及微体生物遗壳埋藏状况等实测资料,通过Q型聚类分析方法,综合分析而成.珠江三角洲地区的现代沉积环境,可以划分为三个基本环境和17个亚环境,主要环境类型为:三角洲平原、三角洲前缘和前三角洲等.珠江三角洲地区的现代沉积环境具有地质构造背景复杂、地貌、第四纪地质发育比较年青,残丘岛屿林立,水系河网交错分布等特征.其沉积模式,系一种河潮混控、多源复合型的湾内充填三角洲组合模式.
In this paper, modern sedimentary environment of the Zhujiang River Delta is identified by Mode Q Cluster analysis method and the synthetical analysis which are chiefly based on the real data of topography, geomorphology, hydr-odynamics condition, sedimentary characteristics, geochemical factors, and the burying state of microfssils.
The analysis reveals that modern sediments of the Zhujiang River Delta can be divided into 3 basic environments and 17 subenvironments. The 3 basic environment types are deltaic plain, deltaic front, and predelta.
On the whole, the modern sedimentary environment in the Zhujiang River Delta is characterized by complicated geological structure background, young landforms and Quaternary geology, widely spreading monadnocks and islands, and cross distribution of river nets etc.
In addition, the Zhujiang River system has hydrod'ynamic conditions sucli as abundance of water and silt contents, fine grain size of sediment, low ratio of silt to water, and frequent changes of water runoff. Thus, It belongs to bay-filled delta combination model, a fluvial-tidal-built complex and an afflux of multiple rivers. It is mainly controlled by the uplifted zone of South China, the northern latitude zone and global transgression process since the Atlantic period.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1989年第4期15-27,共13页
Marine Geology & Quaternary Geology
