辽宁阜新早白垩世几种松柏类化石微细构造及地质意义  

Studies on Structures of Several Early Cretaceous Fossil Conifers in Fuxin, Liaoning Province and Its Geological Significance

作　　者：杜宝霞[1] 闫德飞[1] 孙柏年[1] 邓胜徽[2] 解三平[1] 温雯雯[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]中国石油勘探开发研究院,北京100083

出　　处：《高校地质学报》2010年第3期327-338,共12页Geological Journal of China Universities

基　　金：国家重点基础研究发展计划(973计划)项目(2006CB701401);国家自然科学基金(40772012);兰州大学中央高校基本科研业务费专项资金(lzujbky-2009-69)联合资助

摘　　要：采集了辽宁阜新盆地下白垩统的3种松柏类植物化石,分别为Cephalotaxopsis haizhouensis Shang,Elatocladus cf.dunnii Miller et Lapasha和Elatides harrisii Chow。对三者的表皮微细构造进行了详细研究,其中Cephalotaxopsis haizhouensis和Elatocladus cf.dunnii的微细构造特征总体反映了一种温暖湿润的环境条件。根据它们的表皮构造和气孔带特征,与现生种表皮微细构造做了对比分析,结果显示现生植物Cephalotaxus sinensis和Cephalotaxus fortunei可以作为化石植物Cephalotaxopsishaizhouensis和Elatocladus cf.dunnii的最近现存对应种,通过这两种化石植物与其最近现存对应种的气孔比率定量重建了阜新盆地早白垩世的古大气CO2浓度。The conifer fossils, Cephalotaxopsis haizhouensis Shang, Elatocladus cf. dunnii Miller et Lapasha and Elatides harrisii Chow, were collected from the Lower Cretaceous Fuxin Formation of the Fuxin Basin, Liaoning Province. Studies on the epidermal structures of these three species were carried out, and the epidermal structure characteristics of Cephalotaxopsis haizhouensis and Elatocladus cf. dunnii account for a warm and humid environmental condition. Based on the more complete cuticle and clearer stomatal bands structures, the analysis and comparison of epidermal structures between extant and fossil plants show that Cephalotaxus sinensis and Cephalotaxus fortunei can be the nearest living equivalent species to Cephalotaxopsis haizhouensis and Elatocladus cf. dunnii. The Early Cretaceous CO2 concentration of the Fuxin Basin was quantitatively reconstructed based on the analysis of these two fossil species and their living equivalent species.

关 键 词：化石松柏类 微细构造 早白垩世 古气候 阜新 辽宁 

分 类 号：Q914.2[天文地球—古生物学与地层学]