渤海湾现代沉积速率和沉积过程  

MODERN SEDIMENTATION RATE AND SEDIMENTATION PROCESS IN BOHAI BAY

作　　者：杜瑞芝[1] 刘国贤[1] 杨松林[1] 周义华[1] 张兵 

机构地区：[1]国家海洋局海洋环境保护研究所

出　　处：《海洋地质与第四纪地质》1990年第3期15-22,共8页Marine Geology & Quaternary Geology

摘　　要：本文报道了笔者于渤海湾采集的9个柱样品,用^(210)Pb法测定的现代沉积速率;^(210)Pb剖面揭示出人类和自然原因所产生的沉积事件。并对该湾的沉积过程进行了探讨。 海河口844站^(210)Pb剖面反映出六十年代初,天津新港进行水下工程时出现瞬时堆积的记录;1041站记录了1964年一次雍潮出现的高速沉积带。从而,表明人类和自然对现代沉积作用的贡献,并且,指出这对海洋工程、沉积学及环境科学研究均十分重要。210Pb dating has determined modern sedimentation rate for 9 cores from Bohai Bay. It is found that sedimentation rate is relatively high off the Haihe River mouth (generally over 15mm/yr, and even up to 40-50mm/yr near the bay apex), and gradually decreases in anchorage and outer sea area, usually less than 8mm/yr. Radioactive profiles of the sediments have revealed important events in modern sedimentary environments, core column at site 1041 records the time of the Huanghe River flood and channel changes; and 210Pb profile from site 844 reflects the'instant accumulation'caused by human activities. We think that studies of modern sedimentation rate can be able to unco ver both man-made and natural events and this is very significant to ocean development engineering and scientific researches of environment.

关 键 词：渤海湾 海洋 沉积物 沉积 速率 

分 类 号：P736.21[天文地球—海洋地质]