| 罗平生物群的发现与研究进展——据云南1:5万罗平县等四幅区调和专题调查成果 |
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| 作者姓名： | 张启跃 胡世学 文芠 周长勇 谢韬 黄金元 |
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| 作者单位： | 中国地质调查局成都地质调查中心，四川 成都 610081 |
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| 基金项目： | 中国地质调查“云南1∶5万大同(G48E020009)、圭山(G48E020010)、罗平县(G48E019010)、捧乍(G48E019011)幅区域地质调查项目(编号:1212010610211 )”、“罗平生物区区域地质专项地质调查(编号:12120114068001)”、“罗平生物群及邻区三叠纪化石库专项研究(编号:1212011140051)”和“南盘江—右江成矿区构造演化与矿产空间分布关系调查(编号:12120114030601)”项目联合资助。 |
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| 摘 要： | 成都地质调查中心云南区调项目组2007年在罗平县中三叠统关岭组二段中发现了罗平生物群。罗平生物群是三叠纪的化石宝库,化石包含了脊椎动物和无脊椎动物。脊椎动物以海生爬行类和鱼类为主。无脊椎动物以节肢动物为主,伴生有双壳类、腹足类、菊石、棘皮动物、腕足类、牙形石、有孔虫和植物类化石。牙形石研究显示罗平生物群处于Nicoraella kockeli牙形石带,时代上属于中三叠世安尼期Pelsonian亚期。罗平生物群保存在一个局限的台盆环境中。其化石的特异保存很可能与底层水缺氧和微生物席的密封作用有关。罗平生物群目前是研究三叠纪海洋生态系统复苏的最好的一扇窗口,也是三叠纪海生鱼类和节肢动物化石保存最好的产地之一,为研究二叠纪末大绝灭后海洋生态系统复苏以及中生代海洋生态系统的演化历史提供了新材料。
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| 关 键 词： | 罗平生物群 三叠纪 复苏 生态系统 |
| 收稿时间： | 2015-01-02 |
Research Achievements and Prospect on the Luoping Biota:according to 1∶50000 Regional Geological Survey and achievement of Specific Study for Luoping,Guishan, Datong,Pengzha, Yunnan |
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| Authors: | ZHANG Qi-yue HU Shi-xue WEN Wen ZHOU Chang-yong XIE Tao HUANG Jin-yuan |
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| Institution: | Chengdu Center of China Geological Survey, Chengdu, Sichuan 610081, China |
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| Abstract: | The Luoping Biota was discovered by the Chengdu Centre of China Geological Survey during geological mapping in 2007 at Luoping County, Yunnan Province, SW China. The intervals containing the fossils belong to the Second Member of the Guanning Formation, Middle Triassic. The Luoping Biota is a Triassic Lagersttten including both vertebrates and invertebrates.The vertebrates comprise marine reptiles and fish fossils. The invertebrates are mainly consist of arthropods, and associated with bivalves, gastropods, ammonites, echinoderms, lingulid brachiopods, conodonts, foraminifers, and plants. A conodont-based dating indicates that this biota lies within the conodont(Nicoraella kockeli)zone, and belongs to the Pelsonian, Substage of the Anisian Stage, Middle Triassic. The Luoping Biota is preserved within a restricted intra-platform basin. The exceptional preservation of fossils probably resulted from anoxic condition of bottom water and microbial sealing. The Luoping Biota is a window showing the recovery of Triassic marine ecosystem, as well as one of the best localities for Triassic fishes and arthropods fossils. The Luoping Biota provides new information for studying the recovery and evolution of the marine ecosystem after end Permian mass extinction. |
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| Keywords: | Luoping biota Triassic recovery ecosystem |
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