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

本研究的目的是完成对西北太平洋地区新近系生物地层学，特别是对日本陆相层序的生物地层学有贡献的微化石参考集。该馆藏的微化石来自于深海钻探项目(深海钻探项目)-IPOD(深海钻探项目国际阶段)的样品。Dsdp-ipod样本是地球科学界最重要的样本。根据DDDP-IPOD材料建立的微化石带可作为生物地层学标准。由于化石硅藻在西太平洋地区具有重要的生物地层学意义，因此本研究对它们进行了处理。在制备散布切片之前，从每段岩心中收集了约1500张从DSDP-IPOD液压活塞和钻头岩心收集的涂片，以评估硅藻阀门的保存情况。1,020个沉积物样品用于散布载玻片的制备。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贝类，但在西南太平洋和菲律宾海的所有岩心中硅藻都很稀少。中新世至全新世生物地层事件是西北太平洋西部中高纬度地区的特征，几乎在所有的硅藻植物群中都能识别出来。每个标本都有一个标准的格式，其中包括腿数、孔数、岩芯和段编号、采集段内的间隔、海洋或海洋名称和地质时代。这些标本及其目录供研究人员参考，以便在古生物学和生物地层学中进行参考和比较。

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.