Microfossil assemblage characteristics in Core B10 and implication for paleoenvironmental evolution in the southern Yellow Sea  

作　　者：CHENGZhenbo SHIXuefa CHENZhihua LIUDongsheng LIZhen JUXiaohua 

机构地区：[1]KeyLaboratoryofMarineSedimentologyandEnvironmentalGeology,FirstInstituteofOceanography,StateOceanicAdministration,Qingdao266061,China [2]OceanUniversityofQingdao,Qingdao266003,China

出　　处：《Chinese Science Bulletin》2003年第B06期49-56,共8页

摘　　要：Microfossil assemblage and pollen zone characteristics in Core B10 recorded the history of environmental changes in the southern Yellow Sea since Wiirm Subinterglaciation. Environmental variations reflected by these glacial and interglacial sediments coincide with general characteristics of paleoenvironmental and sedimentary changes in the Yellow Sea. In the section of 550-520 cm, microfossil foraminifera have low abundance and diversity, and pollens are composed mainly of those of herbaceous vegetation, indicating climate change during Wiirm Subinterglaciation. In the section of 520-140 cm, the changes from a few microfossils to no microfossils reflect the sedimentary environment variation from coastal to terrestrial facies. Paleoclimate reflected by pollen also underwent the changes from conifer-broadleaf mixed forest to grassland, indicating the climate changes from temperate and cool type to warm and dry one. In the section of 140-0 cm, the general microfossil characteristics are the gradual increase in abundance with most species being neritic species, the major pollen being ligneous pollen and the rapid increase in small Hystrichosphaera content, which indicates that the air temperature increased and the sea level gradually rose.Microfossil assemblage and pollen zone char- acteristics in Core B_(10) recorded the history of environmental changes in the southern Yellow Sea since W(?)rm Subintergla- ciation. Environmental variations reflected by these glacial and interglacial sediments coincide with general characteris- tics of paleoenvironmental and sedimentary changes in the Yellow Sea. In the section of 550-520 cm, microfossil fo- raminifera have low abundance and diversity, and pollens are composed mainly of those of herbaceous vegetation, in- dicating climate change during W(?)rm Subinterglaciation. In the section of 520-140 cm, the changes from a few micro- fossils to no microfossils reflect the sedimentary environment variation from coastal to terrestrial facies. Paleoclimate re- flected by pollen also underwent the changes from coni- fer-broadleaf mixed forest to grassland, indicating the cli- mate changes from temperate and cool type to warm and dry one. In the section of 140-0 cm, the general microfossil characteristics are the gradual increase in abundance with most species being neritic species, the major pollen being ligneous pollen and the rapid increase in small Hystrichos- phaera content, which indicates that the air temperature increased and the sea level gradually rose.

关 键 词：中国 黄海 环境变化 间冰期沉积物 有孔虫类化石 草本植物 地质气候 还平面 

分 类 号：P736.221[天文地球—海洋地质] P722.5[天文地球—海洋科学]