莱州湾东岸沿海平原区全新世主要地质事件  

MAJOR GEOLOGICAL EVENTS DURING THE HOLOCENE IN THE COASTAL PLAIN AREA IN THE EAST OF LAIZHOU BAY

作　　者：周江[1] 庄振业[2] 王姣姣[1] 马士敏[3] 龙海燕[2] 

机构地区：[1]天津师范大学城市与环境科学学院,天津300384 [2]中国海洋大学海洋地球科学学院,山东青岛266100 [3]北京航天勘察设计研究院,北京100071

出　　处：《海洋湖沼通报》2007年第2期26-33,共8页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(40476032)资助

摘　　要：对莱州湾东岸Y86孔岩芯,进行岩性、粒度、微体化石、孢粉组合的分析和14C年代的测定,将该孔自下而上划分为五层。在此基础上,详细讨论本区全新世海侵以来三个主要地质事件:8～7ka B．P．全新世海侵层与陆相层之间的不整合沉积间断地质事件;在7～6ka B．P．海侵范围达到最大,气候温暖湿润,称中全新世温暖气候事件;随后,在和4．5ka B．P．左右的明显降温事件。Based on the analysis of lithological features, microfossils, element abundance, spropollen and ^14C dating of the core Y86 samples, the stratigraphic division of core Y86 in the coastal plain in the east of Laizhou Bay is expounded in this paper. And on the above basis, three major geological events in the area are discussed in detail： the age and features of the interface of sedimentary interruption in the early Holocene there was a sedimentary interruption event in 8-7Ka B. P. ;about 6Ka B. P. in this area the range of the transgression reaches the maximum and the climate was warm and humid, therefore it is called the Holocene warm and humid climate event ; and then climatic decline event dated 4.5 Ka t3. P. is found in this area.

关 键 词：莱州湾 全新世 地质事件 Y86孔 

分 类 号：P512.32[天文地球—地质学] P534.632