OSTRACODES FROM THE UPPER PERMIAN AND LOWER TRIASSIC AT THE KONGTONGSHAN SECTION OF DATIAN, FUJIAN
OSTRACODES FROM THE UPPER PERMIAN AND LOWER TRIASSIC AT THE KONGTONGSHAN SECTION OF DATIAN, FUJIAN
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发表时间：
2004
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通讯作者：
Yi Wu
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作者：
Yi Wu
本文报道了采自福建大田崆峒山的晚二叠世大隆组、长兴组和早三叠世溪口组的介形类化石。该动物区系共有35属67种，其中包括5新种。长兴组介形类自下而上可划分为3个组合：1. Polytylites magnituberosus-Orthobairdia meishanensis-Pustulobairdia mailinensis组合; 2. Bairdia urodeloformis-Orthobairdia exilimentata-Bairdia subcontracta组合; 3. Petasobairdia bicornuta-Neoamphissites costatus-Kegelites datianensis组合。本文对大田崆峒山介形类化石组合展示前后的演化特征进行了详细的分析和讨论。大田崆峒山P-T界线附近介形类动物群在微观上表现为“突变”特征，在宏观上表现为“渐变“关系，大田长兴组大致相当于浙江眉山长兴组中上部。长兴组灰岩下的海相碎屑岩应属长兴期。沉积相的性质和化石特征表明，晚二叠世至早三叠世的沉积环境经历了滨海沼泽-浅海盆地-碳酸盐台地-滨浅海的演化过程。
The paper reports the ostracoda fossils of the Dalong Formation and Changhsing Formation (Latest Permian), and the Xikou Formation (Earlist Triassic) collected from the Kongtongshan in Datian of Fujian Province. This ostracoda fauna has 67 species and 35 genus, including 5 new species. The ostracodes from the Changhsing Formation can be divided into three assemblages in ascending order:1.Polytylites magnituberosus-Orthobairdia meishanensis-Pustulobairdia mailinensis Assemblage, 2.Bairdia urodeloformis-Orthobairdia exilimarginata-Bairdia subcontracta Assemblage, 3.Petasobairdia bicornuta-Neoamphissites costatus-Kegelites datianensis Assemblage. The evolutionary features around displays of the ostracoda assemblages at Kongtongshan in Datian are analysed and discussed in detail. And the author concluded that the ostracoda fauna around the P-T boundary at Kongtongshan in Datian displays “sudden change” characters in the microscopic view and “gradual change”relationships in the macrocosmic view, and that the Changhsing Formation in Datian County is approximately equivalent to the middle-upper parts of the Changhsing Formation in Meishan of Zhejiang Province, and that the marine detrial rock under the limestone of Changhsing Formation should belong to the Changhsingian. The nature of sedmentary facies and the character of fossils show that the environment from the Late Permian to Early Triassic went through coastal swamp, basin of shallow sea, shallow carbonate platform, and coastall shallow sea.