Establishment of calcareous nannofossi biohorizons around the Northwestern Pacific based on the examination of the upper Cenozoic in Japan

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400483
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geology
• Research Institution: Chiba University
• Principal Investigator: Kameo Koji 千葉大学, 大学院理学研究科, 准教授 (00312968)
• Co-Investigator(Renkei-kenkyūsha): OKADA Makoto 茨城大学, 理学部, 教授 (00250978)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 石灰質ナノ化石基準面 / 北西太平洋海域

Outline of Final Research Achievements

This study aimed at establishing a standard calcareous nannofossil biohorizons in the Pacific side of the Japanese islands that can be useful to determine geologic ages around the Northwestern Pacific region. In this study, we examined Miocene to Pleistocene strata distributed in the Boso Peninsura and core samples obtained from the Nankai Trough Seismogenic Zone Experiment (NanTroSEISE Project). As a result, useful biohorizons during the late Miocene to Pleistocene were clarified in relation to magnetostratigraphy and oxygen isotope stratigraphy. Especially, we firstly reported that calcareous nannofossil biohorizons from the late Pliocene to Pleistocene were directly correlated with oxygen isotope stages in the southern Boso Peninsura and they can be applicable to the northwestern Pacific region.

Free Research Field

微古生物学