Biostratigraphic Study of Paleozoic and Mesozoic Groups in Central and Northern Thailand

泰国中部和北部古生代和中生代群的生物地层学研究

• 批准号: 62043058
• 负责人: YANAGIDA Juichi
• 金额: $ 0.96万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62043058/
• 关键词: Permo-Triassic; Biostratigraphy; Correlation; 古生物地理

The main purposes of this project are summarized as follows;1,establishment of biostratigraphy and correlation of the uppermost Permian and lower Triassic,and 2,ezamination of the Permian palaeobiogeography in Thailand.The surveyed regions are represented by three areas,namely(1),Lampang-Phayao area,(2),Kok Sam Rang-Phetchabun area,and(3),Loei-Pak Chom area.In the Lampang-Phayao area the uppermost Permian ammonoids such as Pseudogastrioceras sp.,Paratirolites sp.nov.,and Paraceltites? sp.were investigated from a weathered mudstone.In addition to them some representative Upper Permian foraminifers were also discriminated from a limestone which overlies the ammonoid-bearing mudstone.Triassic brachiopods were also investigated from a neighbouring locality.Establishment of the stratigraphic succession including the Permo- Triassic boundary will be strongly expected in this area.In the Kok Sam Rang-Phetchabun area Middle Permian limestones and nudstones widely distribute,and the Carboniferous and silurian nudstones are also distributed in the Loei-Pak Chom area.Many kinds and abundant fossils were obtained from these areas. They are very useful for discussing the change of palaeoenvironments and palaeobiogeography during Silurian and Permian.

本项目的主要目的总结如下：1 .上二叠统与下三叠统生物地层学的建立与对比；2 .泰国二叠统古生物地理的划分。调查区域由3个区域代表，即(1)Lampang-Phayao地区，(2)Kok Sam Rang-Phetchabun地区和(3)Loei-Pak Chom地区。在Lampang-Phayao地区，上二叠统菊石如pseudogastrooceras sp.,Paratirolites sp.；, Paraceltites ?sp.在风化泥岩中进行了研究。此外，在含氨泥岩上覆的灰岩中还发现了具有代表性的上二叠统有孔虫。在邻近地区也发现了三叠纪腕足动物。地层演替的建立，包括二叠纪-三叠纪界线的建立，将是该区地层演替的迫切需要。在Kok Sam Rang-Phetchabun地区广泛分布中二叠统灰岩和裸露岩，在loi - pak Chom地区也分布石炭系和志留系裸露岩。在这些地区发现了种类繁多、数量丰富的化石。它们对探讨志留纪和二叠纪的古环境和古生物地理变化具有重要意义。