新疆柯坪地区奥陶纪印干组珊瑚化石的发现及意义
发布时间：2018-07-31 11:35
【摘要】：新疆柯坪地区印干组笔石及三叶虫化石丰富,已做过较多的工作,但珊瑚化石未见报道。柯坪地区南部柯坪塔格山一带出露完整的印干组,该组顶部首次发现富含珊瑚化石的厚层生物碎屑灰岩,珊瑚经鉴定计有9属14种(含未定种)。该珊瑚动物群中,Agetolites,Heliolites和Streptelasma最为丰富。根据珊瑚动物群特征、垂向变化规律及与邻区的对比,建立了Agetolites-Heliolites-Streptelasma生物组合。就生物组合特征而言,该组合可与浙赣地区三巨山组、准噶尔北部布龙果尔组对应,时代属晚奥陶世钱塘江早期,对应国际凯迪期晚期。就生物古地理特征而言,该动物群分子大部分见于华南地区,属中国南方的阿盖特珊瑚区,表明该区当时与华南相连。
[Abstract]:There are abundant fossils of graptolites and trilobites in the Yingan formation in Keping, Xinjiang, and more work has been done, but the coral fossils have not been reported. A complete Ingan formation appeared in the area of Kepingtag Mountain in the south of Keping area. The thick layer bioclastic limestone rich in coral fossils was first found on the top of the group. There are 9 genera and 14 species (including undetermined species) of corals. Among the coral fauna, Agetolitesus Heliolites and Streptelasma are the most abundant. According to the characteristics of coral fauna, vertical variation and comparison with adjacent areas, the Agetolites-Heliolites-Streptelasma bioassemblage was established. In terms of biological assemblage characteristics, the combination can correspond to Sanjiushan formation in Zhejiang and Jiangxi area and Bronggoer formation in northern Junggar, which belongs to the early late Ordovician Qiantang River and corresponds to the late international Keti period. In terms of biogeographic characteristics, most of this fauna was found in southern China, which belongs to the Argett coral region in southern China, indicating that the area was connected with South China at that time.
【作者单位】： 中国人民武装警察部队黄金第七支队;中国地质大学(武汉);兰州大学地质科学与矿产资源学院;兰州大学甘肃省西部矿产资源重点实验室;
【基金】：中国地质调查局西北沿边及特殊地区地质矿产调查二级项目(DD20160079)
【分类号】：Q915.2
，
本文编号：2155461
[Abstract]:There are abundant fossils of graptolites and trilobites in the Yingan formation in Keping, Xinjiang, and more work has been done, but the coral fossils have not been reported. A complete Ingan formation appeared in the area of Kepingtag Mountain in the south of Keping area. The thick layer bioclastic limestone rich in coral fossils was first found on the top of the group. There are 9 genera and 14 species (including undetermined species) of corals. Among the coral fauna, Agetolitesus Heliolites and Streptelasma are the most abundant. According to the characteristics of coral fauna, vertical variation and comparison with adjacent areas, the Agetolites-Heliolites-Streptelasma bioassemblage was established. In terms of biological assemblage characteristics, the combination can correspond to Sanjiushan formation in Zhejiang and Jiangxi area and Bronggoer formation in northern Junggar, which belongs to the early late Ordovician Qiantang River and corresponds to the late international Keti period. In terms of biogeographic characteristics, most of this fauna was found in southern China, which belongs to the Argett coral region in southern China, indicating that the area was connected with South China at that time.
【作者单位】： 中国人民武装警察部队黄金第七支队;中国地质大学(武汉);兰州大学地质科学与矿产资源学院;兰州大学甘肃省西部矿产资源重点实验室;
【基金】：中国地质调查局西北沿边及特殊地区地质矿产调查二级项目(DD20160079)
【分类号】：Q915.2
，
本文编号：2155461
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