摘要
珠江口伶仃洋表层沉积物中业经鉴定的重矿物共有近30种(类).根据重矿物种类和含量的分布特点,可将海区划分为4个重矿物组合类型及相应的4个矿物区,浅海残留砂矿物区主要受陆架水入侵控制;河口湾矿物区主要受陆架水入侵的顶托影响;混合矿物区处于陆架水入侵控制一顶托影响的过渡地段。伶仃洋由于受下泄径流和陆架水入侵的夹击作用,致使其底质沉积物的粒度及重矿物的含量,由陆向海分别呈现“粗-细-粗”和“高-低-高”的变化趋势。
There are thirty Kinds of heavy mineral identified in the surface sediment ofLingding yang. Accrding to charaeter of content and distribution of heavy minerals,andcharacteristic minerals appeared, the Lingding yang is divided into four heavy mineralconbinations and four mineral subsections.Mineral section of the shallow sea-relict sandis invaded by the shelf’s water. Mineral section of the estuary bay is withstanded byshelf’s water. Mixed mineral section is Located at the excessive section between inrasionand withstand of the shelf’s water. Because of the Lingding yang is coerced by leakingriver water and by the shelf’s water invasion,grain size and content of heavy minerals inthe surface sediment are resuIted to present a changing trend from“coarser to finer tocoarser”and“higher to lower to higher”ascope from land to sea.
出处
《中山大学学报(自然科学版)》
CAS
CSCD
1994年第4期103-110,共8页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目
关键词
珠江口
伶仃洋
表层沉积物
重矿物
Lingding Yang in the Pearl River Mouth, surface sediment, heavy mineral,invasion of shelf’s water