Pleistocene to Upper Miocene collodarians and spumellarians (polycystine radiolarians) from the western Indian Ocean, ODP Site 710
Kamikuri, S.; Matsuzaki, K.; M
Bull. Coll. Educ., Ibaraki Univ.（Nat. Sci）, Apr. 2024
Middle to Lower Miocene Radiolarian Biostratigraphy in the West Pacific Warm Pool at the International Ocean Discovery Program (IODP) 363 Site U1490: A Report Presenting Preliminary Results.
Matsuzaki; K.; Kamikuri; S. Sagawa.
Proceedings of the International Ocean Discovery Program, Mar. 2023, []
Environmental conditions during the deposition of the diatomite-organic rich marl alternance of the lower Messinian of the Lower Chelif Basin (Algeria) interpreted from microfossil assemblages and geochemistry.
Journal of African Earth Science
Journal of African Earth Science, May 2022, []
Tropical radiolarian biostratigraphy from the early to late Miocene at ODP Site 714 in the tropical Indian Ocean
Shin-ichi Kamikuri
Paleontological Research, Mar. 2022, []
Les radiolaires messiniens du Dahra (Bassin du Bas Chelif, Algerie): systematique et interet biostratigraphique.
Ali Mokhtar Samet; Abbas Marok; Matias Reloid; Shin-ichi Kamikuri
Annales de Paleontologie, Oct. 2021, []
An Austral radiolarian biozonation for the Paleogene
Hollis; C.; Pascher; K.M.; Sanfilippo; A.; Nishimura; A.; Kamikuri; S.; Shepherd; C.L.
Stratigraphy, Oct. 2020, []
An integrated cross-latitude event stratigraphy for Paleogene radioalrians
Hollis; C.; Pascher; K.M.; Sanfilippo; A.; Nishimura; A.; Kamikuri; S.; Shepherd; C.L.
Stratigraphy, Oct. 2020, []
Variation in the eastern North Pacific subtropical gyre (California Current system) during the Middle to Late Miocene as inferred from radiolarian assemblages
Shin-ichi Kamikuri; and Isao Motoyama
Marine Micropaleontology, May 2020, []
Middle to late Miocene radiolarians at ODP Site 1021 in the eastern North Pacific
Kamikuri; S.
Bulletin of the Geological Survey of Japan, 2019, []
Radiolarian assemblages from the lower to middle Miocene at IODP Site U1335 in the eastern equatorial Pacific
Kamikuri; S.
Bulletin of the Geological Survey of Japan, 2019, []
青森県深浦地域に分布する新第三系層状マンガン鉱床の放散虫化石と地質年代
坂井志緒乃; 伊藤 孝; 上栗伸一; 本山 功; 小室光世
地質学雑誌, 2019, []
Report of the 15th meeting of the International Association of Radiolarists (InterRad XV), 20 October-1 November, 2017, Niigata, Japan
Matsuoka A. and organizing committee of the InterRad XV
Science reports of Niigata University (Geology), 2018
Cenozoic biostratigraphy, chronostratigraphy and paleoceanography in the Boso Peninsula and Bandai Volcano in the Aizu region, East JapanIsao Motoyama; Takuya Itaki; Shin-ichi Kamikuri; Yojiro Taketani; Makoto Okada, The Boso Peninsula is a geologically active region where Cenozoic marine sediments formed in a wide variety of depositional and tectonic environments, including ocean basins, trench, trench-slope basins, forearc basins, and shelf to coastal zones. Radiolarians are key to dating most of these sedimentary rocks. In the northern part of the peninsula, Quaternary sedimentary sequences consisting mainly of siltstone and sandstone crop out along canyons of the Yoro and other rivers. There is no better place in the world than the Yoro canyon to correlate the Pleistocene geomagnetic polarity records to marine micro-biostratigraphy, oxygen isotope records, and radiometric ages from volcanic ash layers. This feature is of great benefit to establishing the boundary stratotype of the lower and middle parts of the Pleistocene Stage. In the more mountainous area to the south, visitors can trace the geological history back to middle Miocene through continuous sedimentary sequences. The earliest fossils imprinted in the rock of the peninsula are of early Cretaceous radiolarians from the Mineoka ophiolite complex. Since the Early Miocene the southern part of the peninsula was covered by seas and close to the trench where the Philippine Sea Plate subducts under the North American Plate. Continual subduction of the oceanic plate resulted in a pile of accreted Miocene sedimentary rocks in the southern part of the peninsula. Cover sediments unconformably resting on those accretionary prisms are thought to represent trench-slope basin deposits. Well-developed uplifted marine terraces in the southern portion of the peninsula represent the Holocene-continuing seismic activity associated with the earthquake cycle. Mount Bandai is a cone-shaped active stratovolcano. Past eruptions and collapses of mountain body formed a dammed lake, Lake Inawashiro, the fourth largest lake in Japan, to the south and created the numerous beautiful lakes in the forest land to the north. Bandai Volcano and its surrounding area was registered as a Japanese Geopark in 2011.InterRed XV in Niigata 2017 Niigata University (JAPAN) Oct/22-Oct/27, 2017, 新潟大学理学部
Science Report of Niigata University, 2017,
[] Radiolarian assemblages during the middle-late Eocene transition at Site 1052, ODP Leg 171B, Blake Nose, western North Atlantic Ocean
Shin-ichi Kamikuri
News of Osaka Micropaleontologists, 2015, []
Early and middle Eocene radiolarian biostratigraphy, IODP Leg 320 Sites U1331, eastern equatorial Pacific.
Shin-ichi Kamikuri; Theodore C. Moore; Kaoru Ogane; Noritoshi Suzuki; Heiko Päiko; Hiroshi Nishi
IODP Scientific Result, 2012, []
Radiolarian magnetobiochronology and faunal turnover across the middle/late Eocene boundary and their implications for enhanced upwelling in the northwest Atlantic Ocean
Shin-ichi Kamikuri; Bridget S. Wade
Marine Micropaleontology, 2012, []
Radiolarian stratigraphy across the Eocene/Oligocene boundary in the equatorial Pacific, Site 1218, U1333 and U1334.
Ted Moore; Shin-ichi Kamikuri
IODP Scientific Result, 2012, []
Revised composite depth scales and integration of IODP Sites U1331, U1332, U1333,U1334 and ODP Sites 1218, 1219, 1220
Thomas Westerhold; Roy Wilkens; Heiko Päike; Mitch Lyle; Tom Dunkley Jones; Paul Bown; Ted Moore; Shin-ichi Kamikuri
IODP Scientific Result, 2012, []
Early and Middle Eocene radiolarian assemblages in the eastern equatorial Pacific Ocean (IODP Leg 320 Site U1331): faunal changes and implications for paleoceanography
Shin-ichi Kamikuri; Theodore C. Moore; Mitchell Lyle; Kaoru Ogane; Noritoshi Suzuki.
Marine Micropaleontology, 2012, []
The successive extinctions of Eocene muricate planktonic foraminifera (Morozovelloides and Acarinina) and their stratigraphic utility for defining the base Priabonian
Bridget S. Wade; Vlasta Premec-Fucek; Shin-ichi; Kamikuri; Paul N. Pearson
Newsletters on Stratigraphy, 2012, []
釧路海底谷から採取された岩石試料の放散虫化石年代本山 功; 上栗伸一; 辻野 匠; 川村喜一郎; 三輪哲也, A marine geological survey was conducted by YK07-14 cruise in the continental slope region off Kushiro, eastern Hokkaido to study sedimentation and tectonic evolution of the forearc-trench system. Rock samples were collected from the submarine outcrops along the Kushiro Canyon during the submariner Shinkai #1032, #1033 and #1035 dives operated by the cruise. From these samples radiolarians were extracted to determine the depositional ages of the sedimentary bodies of the forearc basin and the outer high. Samples taken from the outer high yielded radiolarians indicative of the Late Eocene-Early Oligocene, Early Miocene and early Middle Miocene ages. This result supports a seismic profile-based interpretation that the outer high consists of accretionary prism. Radiolarians from the forearc sediment samples suggest Pliocene or younger ages., National Institute of Advanced Industrial Science and Technology, Geological Survey of Japan
地質調査研究報告, 2010,
[] 青森県津軽半島の下部中新統の地質とストロンチウム同位体年代上栗伸一; 本山 功; 中野孝教; 小笠原憲四郎, The Lower Miocene Isomatsu Formation is exposed on the northwestern part of the Tsugaru Peninsula, northern Japan, where it strikes NW–SE. The formation is subdivided into lower, middle, and upper parts based on lithology. The lower part consists mainly of conglomerate that contains cobbles of altered andesite derived from the underlying Gongenzaki Formation. The middle part is characterized by debris flow deposits, including oyster beds that represent the initial stages of transgression in the Early Miocene. The upper part is predominantly gravely sandstone and mudstone containing mollusc fossils. The characteristics of the sedimentary facies and thickness of the Isomatsu Formation appear to indicate deposition under shallow marine conditions, filling a half-graben bounded by a NW–SE-striking fault.
Strontium isotope analyses (
87Sr/
86Sr) were performed on an oyster shell from the middle part of the Isomatsu Formation, yielding a
87Sr/
86Sr age of 20.4±0.2 Ma. Based on this age and previous fission-track and K-Ar ages obtained for the underlying and overlying formations, we conclude that the Isomatsu Formation was deposited during the late Early Miocene (20–17 Ma). This age represents the time of the initial stage of transgression and the earliest invasion of mollusks into the study area from the Pacific Ocean in the Neogene. This event coincides with the eruption of basalt in the northwest Japan Sea, indicating that the initial transgression in the Tsugaru area was associated with sea-floor spreading in the northern Japan Sea at about 20 Ma., The Geological Society of Japan
地質学雑誌, 2010,
[] 北海道岩見沢幌向川流域の中新統の放散虫化石層序
久保田 資浩; 本山 功; 川村好毅; 上栗伸一; 小笠原憲四郎
石油技術協会誌, 2010, []
The Pacific Equatorial Age Transect, IODP Expeditions 320 and 321: Building a 50-million-year-long environmental record of the Equatorial Pacific
Expeditions 320/321 Scientific Party(全57人中14番目)
Scientific Drilling, 2010
Pacific Equatorial Age Transect (PEAT)
Expeditions 320/321 Scientific Party
UK News letter, 2010
Evolution of Eastern Pacific Warm Pool and upwelling processes since the middle Mioecne based on analysis of radiolarian assemblages: Response to Indonesian and Central American Seaways
Shin-ichi Kamikuri; Isao Motoyama; Hiroshi Nishi; Masao Iwai
Palaeogeography, Palaeoclimatology, Palaeoecology, 2009, []
Pacific Equatorial Transect I
Expedition 320/321 Scientists(全57人中14番目)
IODP Preliminary Report, 2009
Scientific report for Cruise CK09-03 Expedition 904
Hidetaka Nomaki; Kyoma Takahashi; Expedition 904 Scientists (全7人中3番目)
D/V Chikyu JAMSTEC Expedition Science Report, 2009
Proceedings of the Integrated Ocean Drilling Program
Expedition 320/321 Scientific Party(全57人中14番目)
Initial Reports, 2009
Proceedings of the Integrated Ocean Drilling Program, Initial Reports, vol 320/321
Expedition 320/321 Scientific Party
Proceedings of the Integrated Ocean Drilling Program, 2009
日本海における後期中新世以降の放散虫群集と海洋環境.上栗伸一; 本山 功, Radiolarians live in a depth range from the surface to the great depths in the modern ocean, They, therefore, have much potential to reconstruct past vertical water structure as well as surface layer environments. To reconstruct paleoceanographic changes in the Japan Sea during the last 8 million years., we analyzed radiolarian assemblages in a deep-sea sedimentary sequence from the central part of the sea. Our results revealed that the surface layer changed from a warm condition in the late Miocene to a cooler one in the late Pliocene with some fluctuations and cooling steps that occurred at 6.5, 3.5 and 2.5 Ma. Warm water inflows from the south do not seem to have existed before the mid-Pliocene time. The signal of such inflow that can be comparable to the present-day Tsushima Current first appeared at 2.2 Ma. Occurrence of the deep as well as intermediate water species indicates the presence of deep and intermediate water masses comparable to those of the modern North Pacific before 2.5 Ma. The faunal composition of the deep and intermediate water species abruptly changed at 2.5 Ma, indicating that the formation of more oxygen-rich deep water initiated at that time in the sea. The reconstructed history of vertical water masses suggests exchanges of the deep water between the Japan Sea and the adjacent Pacific Ocean and, thus, deep channels are expected to have existed between them before the mid-Pliocene. Diversity of radiolarian assemblages in the Japan Sea was constantly lower than that of the North Pacific during the studied time interval., Palaeontological Society of Japan
化石, 2007,
[] 後期始新世隕石衝突事件所 十三; 西 弘嗣; 上栗伸一, Palaeontological Society of Japan
化石, 2006
Radiolarian faunal turnover across the Oligocene/Miocene boundary in the central eastern Pacific
Shin-ichi Kamikuri; Hiroshi Nishi; Theodore C. Moore; Catherine A. Nigrini,Isao Motoyama
Marine Micropaleontology, 2005, []
Late Oligocene and early Miocene radiolarians from the Sites 1218 and 1219, central Pacific
Shin-ichi Kamikuri; Hiroshi Nishi; Theodore C. Moore; Catherine A. Nigrini,Isao Motoyama
ODP Scientific Results, 2005, []
