地质通报2016，Vol.35Issue(10)：1614-1621,8.
渤海湾4.2ka事件初步研究
A preliminary study of the 4.2ka event along the coast of Bohai Bay
摘要
Abstract
AMS 14C dating revealed that initiation timing of the four buried oyster reefs, Lingtou, Zengkouhe, Biaokou and Airport Lo⁃gistic Center, 3~20km apart from each other, was different but the reef building-up at the four sites were almost simultaneously fin⁃ished by accumulation of the thick muddy sediments at 4.2~4.0ka cal BP or so, which coincided with the‘4.2ka event’. Furthermore, oxygen isotope study of the endogenic carbonate mud taken from the interior of the articulated oyster shells and the overlying muddy sediments in Zengkouhe and Lingtou profiles and pollen analysis from the same sampling positions were carried out. Both results indi⁃cate that the local climate condition tended to be cold and dry during the period of 4.5~4.3ka cal BP and then began to ameliorate in 4.3~4.2ka cal BP. The authors hold that this climate fluctuation was probably a response to the‘4.2ka event’in the study area.关键词
渤海湾/牡蛎礁/4.2ka事件Key words
Bohai Bay/oyster reef/4.2ka event分类
海洋科学引用本文复制引用
商志文,田立柱,范昌福,李建芬,王福,姜兴钰,王宏..渤海湾4.2ka事件初步研究[J].地质通报,2016,35(10):1614-1621,8.基金项目
中国地质调查局项目（编号12120113005800，12120100600015008）和国家自然科学基金项目 （）
