Mid-Cretaceous step-wise demise of the carbonate platform biota in the Northwest Pacific and establishment of the North Pacific biotic province
Mid-Cretaceous step-wise demise of the carbonate platform biota in the Northwest Pacific and establishment of the North Pacific biotic province
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DOI：
10.1016/j.palaeo.2006.09.008
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发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
Yasuhiro Iba;S. Sano
中科院分区：
文献类型：
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作者：
Yasuhiro Iba;S. Sano
白垩纪碳酸盐台地生物群的全球时空分布是地球古生物地理学的一个重要方面。总结了西北太平洋(日本和库页岛)该生物群的所有现有记录，以阐明其地层分布模式和动物群变化，特别是阿普提亚晚期-阿尔卑斯早期的生物群。该碳酸盐台地生物群盛行于西北太平洋贝里亚期至阿尔卑斯早期，表明当时西北太平洋明显属于特提斯生物域。碳酸盐台地生物群的阶段性消亡发生在阿普提安末期至阿尔比亚期中期。中生代关键类群(粗藻和达氏藻类)、一些中生代指示性生物(纹状珊瑚和叠层孔虫)和海鞘类腹足类在阿普天晚期到阿尔卑斯早期的过渡时期消失。在这一事件之后，其他中生代指示物(轨道有孔虫和钙质红藻)和包裹颗粒在阿尔卑斯过渡早期到中期消失。在中阿尔卑斯-古新世之间的较长一段时间内，西北太平洋没有碳酸盐台地生物群的记录。阿尔比安中晚期碳酸盐台地生物群的阶段性消亡强烈地暗示了一次“更替事件”，它将北太平洋从特提斯生物域分离出来，建立了北太平洋生物区。
The global spatiotemporal distribution of the Cretaceous carbonate platform biota, which is characterized by “tropical” Mesogean (= Cretaceous Tethys) taxa, is an important aspect of Earth's paleobiogeography. All available records of this biota in the Northwest Pacific (Japan and Sakhalin Island) are summarized in order to elucidate its stratigraphic distribution patterns and faunal changes, with special attention given to the biota of the Late Aptian–Early Albian. This carbonate platform biota flourished from the Berriasian to Early Albian interval in the Northwest Pacific, indicating that the Northwest Pacific clearly belonged to the Tethyan biotic realm at that time. A step-wise demise of the carbonate platform biota transpired in the latest Aptian to middle Albian interval. Mesogean key taxa (rudists and dasycladacean algae), some Mesogean indicators (hermatypic corals and stromatoporoids) and nerineacean gastropods disappeared at the Late Aptian to Early Albian transition. Following this event, other Mesogean indicators (orbitolinid foraminifers and calcareous red algae) and coated grains disappeared at the Early to middle Albian transition. There is no record of carbonate platform biota in the Northwest Pacific during the long interval between the Middle Albian and Paleocene. The step-wise demise of the carbonate platform biota in the latest Aptian–middle Albian interval strongly implies a “vicariance event”, which separated the North Pacific from the Tethyan biotic realm and established the North Pacific biotic province.