北海外沙泻湖全新世微体古生物群特征及其古地理意义  

Holocene miropaleontological characteristics and its paleogeographical significance in the Waisha Lagoon, Beihai

作　　者：黎广钊[1] 陈荣华[2,3] 梁文[1] 农华琼[1] 刘敬合[1] 

机构地区：[1]广西海洋研究所 [2]国家海洋局第二海洋研究所 [3]国家海洋局海底科学重点实验室,浙江杭州310012

出　　处：《东海海洋》1999年第4期29-38,共10页Donghai Marine Science

基　　金：国家自然科学基金! (49766013)

摘　　要：通过对北海外沙泻湖CK10 钻孔岩芯进行硅藻、有孔虫、孢粉的综合分析, 发现全新世地层中有8 个硅藻组合带,5 个孢粉组合带和5 个有孔虫组合。结合14C测年资料与沉积物特征, 认为该泻湖全新世地层可划分为早全新世、中全新世、晚全新世。植被演替为混有落叶阔叶林的亚热带常绿阔叶林→亚热带常绿林→亚热带、热带常绿阔叶林→混杂有中、北亚热带落叶阔叶林的南亚热带季风雨林→南亚热带常绿阔叶林。气候演变依次为热湿偏凉干→热湿→炎热潮湿→热湿偏凉→热湿。沉积相发展顺序为河漫滩相→河口沼泽相→河漫滩相→河口沼泽相→河口湾相→泻湖相→河口湾相→泻湖相。Based on the analysis of diatom, foram and sporopollen of KC10 core from the Waisha Lagoon, Beihai, eight diatom assemblages, five foram assemblages and five sporopollen assemblages were found in the Holocene strata, Beihai. Combined with the data of\ \+\{14\}C dating and characteristics of the sediments, it is thought that the Holocene strata of the Waisha Lagoon can be divided into three parts of early, middle and late Holocene. The evolution sequences of climate from bottom to top are hot wet by cool dry→hot wet→burning hot wet→hot wet by cool→hot wet climate. The development sequences of sedimentary facies are riverine flood\|plain→river mouth\|marsh→riverine flood\|plain→river mouth\|marsh→estuary→semi\|enclosed lagoon→estuary→semi\|enclosed lagoon.

关 键 词：Xi湖 全新世 古地理 古气候 微体古生物群 

分 类 号：Q911.663.2[天文地球—古生物学与地层学] P531[生物学—古生物学]