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星座图法在二叠纪末期Albaillella属放射虫化石形态分类中的应用 被引量:1
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作者 金雨溪 宣闯 冯庆来 《微体古生物学报》 CSCD 北大核心 2006年第1期16-22,共7页
晚二叠世放射虫Albaillella属分布广泛,壳体结构相对简单,性状演化较快,具有重要的地层学价值(Kuwahara,1997),但这也给形态种分类带来许多困难。本文选用产自广西扶绥东攀剖面的一批保存完好的Albaillella属放射虫化石样品,对样品壳体... 晚二叠世放射虫Albaillella属分布广泛,壳体结构相对简单,性状演化较快,具有重要的地层学价值(Kuwahara,1997),但这也给形态种分类带来许多困难。本文选用产自广西扶绥东攀剖面的一批保存完好的Albaillella属放射虫化石样品,对样品壳体的七种形态性状进行测量,并将其进一步转换为七种数值分类指标。尝试应用星座图法综合利用这些指标进行分类,并利用拉格朗日乘子法求解二次规划模型,量化分类指标权值,最后依据此权值对新样品进行判别。文末讨论了此方法的适用范围。 展开更多
关键词 albaillella 星座图 数值分类 二叠纪 广西
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Characteristics of Albaillella (Albaillellarian,Radiolarian) Fauna from Guadalupian to Lopingian Series in Permian,South China 被引量:2
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作者 Sun Dongying Xia Wenchen Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 《Journal of China University of Geosciences》 SCIE CSCD 2003年第4期314-320,共7页
On the basis of establishment of radiolarian biostratigraphy and conodont biostratigraphy, a radiolarian Albaillella fauna in the transitional environment from Guadalupian to Lopingian Series in Permian was found at a... On the basis of establishment of radiolarian biostratigraphy and conodont biostratigraphy, a radiolarian Albaillella fauna in the transitional environment from Guadalupian to Lopingian Series in Permian was found at a pelagic chert section in southeast Guangxi, South China. Radiolarian Albaillella is one of the most sensitive biology to the transitional environment. The Albaillella fauna shows an ecological evolutionary process from Guadalupian to Lopingian: declined stage-recovery stage-flourishing stage. The study of characteristics of the Albaillella fauna in the transitional environment may provide more information, not only for the subdivision and correlation of a high-resolution biostratigraphy, but also for influence of radiolarian Albaillella fauna on the pre-Lopingian mass extinction. 展开更多
关键词 PERMIAN Guadalupian-Lopingian Series transitional environment radiolarian albaillella fauna.
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