| 湖北保康白竹陡山沱组磷酸盐化
微化石新资料及其地层意义 |
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| 关键词:Doushantuo Formation phosphatisation microfossils Baokang Hubei Province |
| 基金项目:科技部基础工作专项(2006FY120300), 中国地质调查局项目(1212010611802-2)及国家自然科学基金项目(40672022) |
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| New Data of Phosphatized Microfossils from the Doushantuo Formation in Baizhu, Baokang County, Hubei Province, and Their Stratigraphic Implications |
| Phosphatized microfossils, something like Weng’an biota, were reported by Zhou et al. (2004) from the Doushantuo phosphorites in Baizhu, Baokang, Hubei Province, which include multicelular algae Wengania, Paramecia, Thallophyca; large acanthomorphic acritarchs Meghystrichosphaeridium, Knollisphaeridium; coc-coidal cyanobacteria Archaeophycus; filamentous algae Siphonophycus, Obruchevella and a new genus Baca-tisphaera. The authors recently reinvestigated the Doushantuo Formation in Baizhu, Baokang, Hubei Province and systematically collected samples to do examination. Besides the discovery of the above microfossils, the authors also found lagar acanthomorphic acritarchs Papillomembrana compta, Appenendisphaera sp.; globular microfossil Megasphaera inornata, Megaclonophycus onustus and most common filament Salome hubeiensis in the Yangtze Gorges. Studies demonstrate that the fossiliferous horizon of the Doushantuo Formation reported here is roughly equivalent to the 2nd Member of the Doushantuo Formation in the Yangtze Gorges and the upper phosphate-rich strata of the Doushantuo Formation in Weng’an area. These new data further prove that the lower assemblage composed of multicelular algae, large acanthomorphic acritarchs, globular microfossils, coccoidal and filamentous cyanobacteria found in the 2nd Member in the Yangtze Gorges has a wide distribution and stable horizon. |
| YIN Chong-yu,LIU Peng-ju,GAO Lin-zhi,TANG Feng,CHEN Shou-ming.2009.New Data of Phosphatized Microfossils from the Doushantuo Formation in Baizhu, Baokang County, Hubei Province, and Their Stratigraphic Implications[J].Acta Geoscientica Sinica,30(4):447-456. |
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