内蒙古固阳茜连脑包一带早白垩世植物及其埋藏学研究  

EARLY CRETACEOUS FOSSIL PLANT FROM QIANLIANNAOBAO OF GUYANG, INNER MONGOLIA AND ITS TAPHONOMY STUDY

作　　者：金培红[1] 王姿晰[1] 王浩飞[1] 杜宝霞[1] 

机构地区：[1]兰州大学地质科学与矿产资源学院,甘肃兰州730000

出　　处：《甘肃地质》2013年第3期19-27,共9页Gansu Geology

基　　金：国家自然科学基金(41172022);高等学校博士学科点专项科研基金(20120211110022)资助

摘　　要：内蒙古中部早白垩世地层发育,含植物化石较好,但经系统描述和报道的材料并不多。对固阳城西茜连脑包一带下白垩统的植物化石进行了系统采集,化石采自固阳组灰黑色泥岩以及灰绿色、黄绿色粉砂质泥岩中。在对植物化石进行系统鉴定及描述的基础上,探讨了化石植物的埋藏环境。其中保存于灰黑色泥岩中的植物化石形态较为完整,且泥岩指示弱水动力条件,因而这些化石可能为近原地埋藏;而保存于粉砂质泥岩中的化石保存较为破碎,且粉砂质泥岩表示水动力较强的环境,故这些化石可能经过水流搬运,为异地埋藏。通过以上化石的保存状态及岩性特征,可知茜连脑包一带早白垩世固阳组化石埋藏类型为近原地埋藏和异地埋藏两种,且植物化石指示较温暖湿润的古气候环境。Early Cretaceous strata in the middle Inner Mongolia are well-developed, and contain well preserved plant fossils, many of which have not been systematically described and reported. This paper studies the fossil plants collected from the ash black mudstone and greyish-green, yellow-green silty mudstone of Lower Cretaceous Guyang Formation at Xiliannaobao Village, west Guyang County. According to the preservative conditions and lithological characters, it is purposed that there are parautochthonous burial and heteroehthonous burial types in the study area, and the fossil plant should be under a warm humid subtropical climate during the Early Cretaceous.

关 键 词：植物化石 固阳 早白垩世 古气候 埋藏环境 

分 类 号：Q914[天文地球—古生物学与地层学]