| 鄂尔多斯盆地中—晚三叠世陆相地层与建阶 |
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| 关键词:Ordos Basin terrestrial strata Middle–Late Triassic stage |
| 基金项目:中国地质调查局地质调查项目(编号: 1212011120142; 12120114026701; 1212011120115; 1212011120116; 1211402108021); 科技部科技基础性工作专项(编号: 2015FY310100);国家重点基础研究发展计划(编号: 2011CB403002); 国家自然科学基金项目(编号: 41472030) |
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| Middle–Late Triassic Terrestrial Strata and Establishment of Stages in the Ordos Basin |
| Terrestrial deposits are especially well developed in the strata of China since the Mosozoic. It is difficult to directly compare terrestrial strata with marine strata because of their different developmental characteristics. In the first period of the Mesozoic period, the Triassic occurred in many terrestrial lacustrine basins of China. The study of these Triassic lacustrine deposits contributes to the establishment of terrestrial chronostratigraphic sequences, the division of the terrestrial strata and the provision of its ages that are comparable with those of marine strata. In this paper, the authors selected the Qishuihe section and Kuyehe section in the Ordos Basin to carry out the study of establishing new stages of Middle–Late Triassic terrestrial strata. The authors first summarized the lithostratigraphic classification of the Ordos Basin, then analyzed the occurrence, development and flourishing of various organisms so as to find out the biological assemblages and biological boundaries, and finally established four new stages: the Middle Triassic Yintaian stage and Jinsuoguanian stage, and the Upper Triassic Yangjiapingian stage and Jiaopingian stage. The bottoms of these stages are respectively defined by the first appearance of the Ostracods Tungchuania quadratiformis and Lutkevichinella ansulca (Yintaian stage), the plants Danaeopsis magnifolia, Danaeopsis cf. marantacea and Tongchuanophyllum shensiense (Jinsuoguanian stage), the plants Asterotheca szeiana and Danaeopsis fecunda (Jinsuoguanian stage), and the plant assemblage Danaeopsis fecunda-Asterotheca szeiana-Cladophlebis kaoiana (Jiaopingian stage). |
| LI Ya,YAO Jian-xin,WANG Si-en,PANG Qi-qing.2016.Middle–Late Triassic Terrestrial Strata and Establishment of Stages in the Ordos Basin[J].Acta Geoscientica Sinica,37(3):267-276. |
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