CRETACEOUS GEOLOGY AND PALEONTOLOGYOF KORYAK

科里亚克白垩纪地质和古生物学

• 批准号: 10041109
• 负责人: TANABE Kazushige
• 金额: $ 7.36万
• 依托单位: UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10041109/
• 关键词: FAR EASTERN RUSSIA; KORYAK UPLAND; CRETACEOUS; AMMONITES; INOCERAMUS; INTERNATIONAL CORRELATION; PALEOBIOGEOGRAPHY; PALEOTEMPERATURE CURVE; コリヤク地方; 堆積相

The Koryak Upland, north of the Kamchatka Peninsula, Far East Russia Has been sell known for the extensive distribution of fossiliferous marine Cretaceous deposits. However, details of the Cretaceous biostratigraphy and paleontology of molluscan fossils, especially ammonites have not yet sufficiently studied.In the summer of 1998 and 1999, a field expedition by a joint team of Japanese and Russian geologists and paleontologists (leader Prof. Kazushige Tanabe of University of Tokyo) was operated in the eastern coastal region of Penzhina Bay and along the lower and middle streams of the Talovka River and its tributaries to understand the Cretaceous biostratigraphy and paleobiogeographic characteristics of the molluscan faunas. As a result of our expedition, large amounts of ammonite and inoceramid fossils have been obtained from various horizons and localities of the Upper Albian - Maastrichitian sequences. The Albian and Cenomanian fauna has an affinity with that of the U.S. Western Interior Province, especially by the occurrence of Neogastroplites. The Turonian and Coniacian ammonoid faunas consist mainly of norht Pacific faunal elements but lack in typical Tethyan elements such as Collignoniceratidae. These data will provide a fundamental basis to consider the biostratigraphy, paleobiogeography and phylogeny of the Cretaceous ammonite faunas in the north Pacific region.

位于俄罗斯远东堪察加半岛北部的科里亚克高地，以分布广泛的海相白垩纪沉积而闻名。然而，白垩纪生物地层学和古生物学的软体动物化石，特别是菊石化石的细节还没有得到充分的研究，1998年和1999年夏天，一个由日本和俄罗斯地质学家和古生物学家组成的联合小组进行的实地考察（组长东京大学田边和茂教授）在彭日纳湾东部沿岸和塔洛夫卡河及其支流的中、下游沿着进行了白垩纪软体动物生物地层和古生物地理研究动物群作为我们考察的结果，从上阿尔布-马斯特里赫特层序的不同层位和地点获得了大量的菊石和菊石化石。阿尔比亚和森诺曼动物群与美国西部内陆省的动物群有密切关系，特别是新腹石动物群的出现。土伦期和科尼亚期菊石动物群主要由北太平洋动物群成分组成，但缺乏典型的特提斯成分，如Collignoniceratidae。这些资料将为研究北太平洋白垩纪菊石动物群的生物地层、古生物地理和生物发生提供基础。