Preparation of microfossil standard collection from DSDP-IPOD sediment samoles.

本研究的目的是完成北太平洋西部地区新近纪生物地层学，特别是日本陆相层序的微化石参考资料收集。收集的微化石是由DSDP（深海钻探项目）- IPOD（深海钻探项目的海洋钻探国际阶段）样品制备的。DSDP-IPOD样品在地球科学中是最重要的。以DDDP-IPOD材料为基础建立的微化石带可作为生物地层标准。由于硅藻化石在西太平洋地区具有重要的生物地层学意义，本研究对其进行了处理。在制备散布玻片之前，从DSDP-IPOD液压活塞和钻孔岩心中收集约1500张涂抹玻片，对每个岩心切片进行检查，以估计硅藻瓣的保存情况。采用120份沉积物样品制备铺层滑块。这些取自北太平洋西部、白令海和日本海的样品中含有丰富的硅藻瓣，但在南太平洋西部和菲律宾海的所有岩心中硅藻都很稀少。中新世至全新世的生物地层事件，是北太平洋西部中至高纬度地区的特征，在几乎所有硅藻区系中都有发现。每个标本都用标准表格进行了登记，其中包括腿号，孔号，岩心和剖面号，采集样本的剖面内的间隔，海洋或海洋名称和地质年龄。这些标本及其目录可供古生物学和生物地层学的研究人员参考和比较。

The purpose of this research is to complete the microfossil reference collection which contributes to Neogene biostratigraphy in the western North Pacific region, in particular to that of the Japanese onland sequence. The microfossils of the collection are prepared from DSDP (Deep Sea Drilling Project) - IPOD (International Phase of the Ocean Drilling of the Deep Sea Drilling Project) samples. The DSDP-IPOD samples are the most significant in earth sciences. The microfossil zones established on the basis of the DDDP-IPOD materials serve as biostratigraphical standards. The fossil diatoms are treated in this research because of their biostratigraphical importance in the western Pacific region.Prior to preparation of strewn slides, about 1500 smear slides collected from DSDP-IPOD hydraulic-piston and drill cores were examined from each section of cores in order to estimate the preservation of diatom valves. One thousand and twenty sediment samples were used for strewn slide preparation. These samples taken from western North Pacific Ocean, Bering Sea and the Sea of Japan include abundant diatom valves, but diatoms are scarce in all cores from the western South Pacific Ocean and Philippine Sea. Miocene to Holocene biostratigraphical events, Characteristic of the middle- to high-latitude western North Pacific regions, are recognized in almost all diatom floras.Each specimen has been registered with a standard form which includes leg number, hole number, core and section numbers, interval within the section from which the sample was collected, ocean or sea name and geological age.These specimens and their catalogue are consulted by investigators for reference and comparison purposes in paleontology and biostratigraphy.