贺兰山上三叠统上田组植物化石研究  

Research on fossil plants of Late Triassic Shangtian Formation in the Helan Mountain

作　　者：马彦云 马学东 王成 李明涛 何庆志 黄生金 吴坤 田景雄 MA Yanyun;MA Xuedong;WANG Cheng;LI Mingtao;HE Qingzhi;HUANG Shengjin;WU Kun;TIAN Jingxiong(Ningxia Institute of Geological Survey, Yinchuan 750021, Ningxia, China;China University of Geosciences（Beijing）, Beijing 100083, China)

机构地区：[1]宁夏回族自治区地质调查院,宁夏银川750021 [2]中国地质大学(北京),北京100083

出　　处：《地质通报》2018年第4期538-544,共7页Geological Bulletin of China

基　　金：中国地质调查局项目<祁连成矿带肃南-大柴旦地区地质矿产调查--宁夏六盘山北段1:5万彭堡等四幅区域地质调查>(编号:DD20160012)

摘　　要：对贺兰山地区上田组的植物化石开展研究,此次鉴定出12属14种,结合前人资料,上田组植物化石共计20属35种。其中,真蕨纲和种子蕨纲9属19种,占54%;苏铁纲4属6种,占17%;楔叶纲1属4种,占11%;松柏纲3属3种,占9%;银杏纲2属2种,占6%;分类位置不明的种子1属1种,占3%。该地区植物化石组合以中国北方型Danaeopsis-Bernoullia植物群的属种占主导地位,同时混生了中国南方型Dictyophyllum-Clathropteris植物群的分子Dictyophyllum,且苏铁类占一定的比例,反映了晚三叠世末期贺兰山为半干旱的亚热带大陆型气候,且正在向湿热发展。In this paper, the fossils of the Shangtian Formation in the Helan Mountain area were studied, and 14 species of 12 generawere identified. In combination with the data provided by previous researchers, there are 35 species of 20 genera in the ShangtianFormation, which include Filicopsida and Spermatophyta of 19 specie in 9 genera, Cycadopsida of 6 species in 4 genera, Sphenopsidaof 4 species in 1genus, Coniferae of 3 species in 3 genera, Ginkgopsida of 2 species in 2 genera. Many plants have the characteristics of Danaeopsis - Bernoullia flora belonging to northern provinces of China, but some species of southern provinces in China and Cy.cadopsida were also found in this flora. Studies show that the Helan Mountain was dominated by a semi-arid subtropical continentalclimate in the late Late Triassic, which was developed towards humid heat.

关 键 词：贺兰山 晚三叠世 上田组 植物化石 

分 类 号：P534.51[天文地球—古生物学与地层学]