海洋地质与第四纪地质2012，Vol.32Issue(5)：81-88,8.DOI:10.3724/SP.J.1140.2012.05081
渤海湾西北岸滨海湖埋藏牡蛎礁硅藻及其记录的古环境
DIATOM RECORDS OF THE BINHU BURIED OYSTER REEF,IN BINHAIHU,NORTHWEST BOHAI BAY AND PALEO-ENVIRONMENTAL IMPLICATIONS
摘要
Abstract
The muddy sediments filling into the oyster shells in Binhaihu oyster reef of the northwest Bohai Bay were collected for diatom analysis. Auliscus caelatus , an indicator of intertidal zone environment, is as high as 19%—42% in the reef that suggested that the Binhaihu oyster reef was formed in an intertidal environment. Based on the diatoms and 14C dating, three zones were subdivided from the bottom to the top. The Zone I, formed during the period of 2 445~2 327 cal. aBP, was deposited in an open lagoon-intertidal environment with strong river influence. The marine influence decreased as the influence of intertidal zone increased upwards. In the Zone II, which was formed around 2 327cal. aBP, marine species Thalassionema nitzschioides increased while oceanic species Coscinodiscus spp. And Actinocyclus spp. Decreased, showing a closed inner lagoon-intertidal environment, and the salinity of lagoon was increased due to the decrease in river input. The Zone III, formed 2 327~2 287 cal. aBP, was resulted of the change from a closed lagoon to an open lagoon-intertidal environment.关键词
埋藏牡蛎礁/硅藻分析/潟湖/潮间带/渤海湾Key words
buried oyster reef/diatom analysis/lagoon/ intertidal zone/Bohai Bay分类
海洋科学引用本文复制引用
方晶,胡克,范昌福,商志文,杨永强,齐乌云,王福,裴艳东,王宏..渤海湾西北岸滨海湖埋藏牡蛎礁硅藻及其记录的古环境[J].海洋地质与第四纪地质,2012,32(5):81-88,8.基金项目
国家自然科学基金项目(40872106) （40872106）
地质调查项目(1212010911069,1212011120089) （1212010911069,1212011120089）
