Research Achievements - Original paper -

Dust correlation and oxygen isotope stratigraphy in the Southern Ocean over the last 450 kyrs: An Indian sector perspective

Hiroki Matsui, Minoru Ikehara, Yusuke Suganuma, Osamu Seki, Ikumi Oyabu, Kenji Kawamura

Quaternary Science Reviews ( Elsevier )  286   107508   2022.06  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Timing of Eocene compressional plate failure during subduction initiation, northern Zealandia, southwestern Pacific

Stratford, W.R., Sutherland, R., Dickens, G.R., Blum, P., Collot, J., Gurnis, M., Saito, S., Bordenave, A., Etienne, S.J.G., Agnini, C., Alegret, L., Asatryan, G., Bhattacharya, J., Chang, L., Cramwinckel, M.J., Dallanave, E., Drake, M.K., Giorgioni, M., Harper, D.T., Huang, H.H.M., Keller, A.L., Lam, A.R., Li, H., Matsui, H., Morgans, H.E.G., Newsam, C., Park, Y.-H., Pascher, K.M., Pekar, S.F., Penman, D.E., Westerhold, T., Zhou, X.

Geophysical Journal International     2022.06  [Refereed]

Research paper (journal)   International Co-author

DOI

Changes in upper ocean hydrography and productivity across the Middle Eocene Climatic Optimum: Local insights and global implications from the Northwest Atlantic

Jun Arimoto, Hiroshi Nishi, Azumi Kuroyanagi, Reishi Takashima, Hiroki Matsui, Minoru Ikehara

Global and Planetary Change ( Elsevier BV )  193   103258 - 103258   2020.10  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Perspectives on a Seamless Marine-lake Sediment Coring Study in East Antarctica

Yusuke SUGANUMA, Takeshige ISHIWA, Moto KAWAMATA, Jun'ichi OKUNO, Kota KATSUKI, Takuya ITAKI, Osamu SEKI, Heitaro KANEDA, Hiroki MATSUI, Yuki HANEDA, Masakazu FUJII, Daisuke HIRANO

Journal of Geography   129 ( 5 ) 591 - 610   2020.10  [Refereed]

Research paper (journal)   Domestic Co-author

Integrated Neogene biochemostratigraphy at DSDP Site 296 on the Kyushu–Palau Ridge in the western North Pacific

Hiroki Matsui, Keiji Horikawa, Shun Chiyonobu, Takuya Itaki, Minoru Ikehara, Shungo Kawagata, Hitomi Wakaki-Uchimura, Yoshihiro Asahara, Osamu Seki, Yusuke Okazaki

Newsletters on Stratigraphy ( Schweizerbart )  53 ( 3 ) 313 - 331   2020.06  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Continental-scale geographic change across Zealandia during Paleogene subduction initiation

R. Sutherland, G.R. Dickens, P. Blum, C. Agnini, L. Alegret, G. Asatryan, J. Bhattacharya, A. Bordenave, L. Chang, J. Collot, M.J. Cramwinckel, E. Dallanave, M.K. Drake, S.J.G. Etienne, M. Giorgioni, M. Gurnis, D.T. Harper, H.-H.M. Huang, A.L. Keller, A.R. Lam, H. Li, H. Matsui, H.E.G. Morgans, C. Newsam, Y.-H. Park, K.M. Pascher, S.F. Pekar, D.E. Penman, S. Saito, W.R. Stratford, T. Westerhold, X. Zhou

Geology ( Geological Society of America )  48 ( 5 ) 419 - 424   2020.05  [Refereed]

Research paper (journal)   International Co-author

<title>Abstract</title>
Data from International Ocean Discovery Program (IODP) Expedition 371 reveal vertical movements of 1–3 km in northern Zealandia during early Cenozoic subduction initiation in the western Pacific Ocean. Lord Howe Rise rose from deep (∼1 km) water to sea level and subsided back, with peak uplift at 50 Ma in the north and between 41 and 32 Ma in the south. The New Caledonia Trough subsided 2–3 km between 55 and 45 Ma. We suggest these elevation changes resulted from crust delamination and mantle flow that led to slab formation. We propose a “subduction resurrection” model in which (1) a subduction rupture event activated lithospheric-scale faults across a broad region during less than ∼5 m.y., and (2) tectonic forces evolved over a further 4–8 m.y. as subducted slabs grew in size and drove plate-motion change. Such a subduction rupture event may have involved nucleation and lateral propagation of slip-weakening rupture along an interconnected set of preexisting weaknesses adjacent to density anomalies.

DOI

Radiolarian Biostratigraphy and Faunal Turnover across the Early/Middle Miocene Boundary in the Equatorial Pacific

Shin-Ichi Kamikuri, Theodore C. Moore, Hiroki Matsui, Hiroshi Nishi

Paleontological Research ( The Paleontological Society of Japan )  23 ( 4 ) 245 - 260   2019.10  [Refereed]

Research paper (journal)   International Co-author

DOI

Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Leg 342)

Sietske J. Batenburg, Oliver Friedrich, Kazuyoshi Moriya, Silke Voigt, Cécile Cournède, Iris Moebius, Peter Blum, André Bornemann, Jens Fiebig, Takashi Hasegawa, Pincelli M. Hull, Richard D. Norris, Ursula Röhl, Philip F. Sexton, Thomas Westerhold, Paul A. Wilson, IODP Expedition 342 Scientists

Newsletters on Stratigraphy ( Schweizerbart )  51 ( 2 ) 245 - 260   2018.03  [Refereed]

Research paper (journal)   International Co-author

DOI

Latest Cretaceous/Paleocene deep-sea ostracode fauna at IODP Site U1407 (western North Atlantic) with special reference to the Cretaceous/Paleogene boundary and the Latest Danian Event

Tatsuhiko Yamaguchi, André Bornemann, Hiroki Matsui, Hiroshi Nishi

Marine Micropaleontology ( Elsevier BV )  135   32 - 44   2017.09  [Refereed]

Research paper (journal)   International Co-author

DOI

Sexual shape dimorphism and selection pressure on males in fossil ostracodes

Tatsuhiko Yamaguchi, Rie Honda, Hiroki Matsui, Hiroshi Nishi

Paleobiology ( Cambridge University Press )  43 ( 3 ) 407 - 424   2017.08  [Refereed]

Research paper (journal)   Domestic Co-author

<title>Abstract</title>Sexual dimorphism is thought to have evolved via selection on both sexes. Ostracodes display sexual shape dimorphism in adult valves; however, no previous studies have addressed temporal changes on evolutionary timescales or examined the relationships between sexual shape dimorphism and selection pressure and between sexual shape dimorphism and juvenile shape. Temporal changes in sexually dimorphic traits result from responses of these traits to selection pressure. Using the Gaussian mixture model for the height/length ratio, a valve-shape parameter, we identified sexual differences in the valve shape of <italic>Krithe dolichodeira</italic> s.l. from deep-sea sediments of the Paleocene (62.6–57.6 Ma) and estimated the proportion of females in the fossil populations at 11 time intervals. Because the proportion of females in a population is altered by the mortality rate of adult males, it is reflective of selection pressure on males. We attempted to correlate the height/length ratios between the sexes with the proportion of females, taking into consideration that the valve shape was not linked with the selection pressure on males. In time-series data of the height/length ratio, both sexes indicate no significant changes on evolutionary timescales, even though the sex ratio of the population changed from female skewed to male skewed during the late Paleocene. The sexual shape dimorphism was not driven by sexual selection. The static allometry between the height/length ratio and length indicates that the sexual shape dimorphism did not function for sexual display. The absence of change over time in the female allometric slope suggests that the evolution of valve shape was constrained by stasis.

DOI

Vertical thermal gradient history in the eastern equatorial Pacific during the early to middle Miocene: Implications for the equatorial thermocline development

Hiroki Matsui, Hiroshi Nishi, Azumi Kuroyanagi, Hiroki Hayashi, Minoru Ikehara, Reishi Takashima

Paleoceanography ( American Geophysical Union (AGU) )  32 ( 7 ) 729 - 743   2017.07  [Refereed]

Research paper (journal)   Domestic Co-author

Knowledge of the equatorial thermocline is essential for understanding climate changes in the tropical Pacific. Multispecies planktic foraminiferal analyses provide a way to examine temperature distributions and thus the structure of the thermocline. Although the secular thermocline development has been documented back to the late Miocene, the early to middle Miocene interval has rarely been examined. In addition, relationships with the dynamic Antarctic ice sheets remain unclear. Here we investigate the vertical thermal gradient in the upper water column at Integrated Ocean Drilling Program Site U1337 in the eastern equatorial Pacific (EEP) throughout the early to middle Miocene (23.1 to 11.7 Ma). The gradient increased over the Miocene Climatic Optimum, whereas it decreased during the East Antarctic Ice Sheet Expansion (EAIE). Comparison of the EEP record with its western equatorial Pacific (WEP) counterpart suggests that sea surface temperature was more stable in the WEP than in the EEP. We further estimated equatorial thermocline from two diagonal gradients between the EEP and the WEP: thermocline shoaled from 16.7 to 15.7 Ma and tilt weakened between 16.5 and 13.8 Ma. The onset of the “Monterey Excursion” and the reduced Antarctic ice sheet volume would have affected thermocline depth and tilt, respectively. Thermocline depth was likely much deeper compared to Pliocene-to-modern conditions. Furthermore, a 4-point-based distribution of isotherms (4DI index) was used as a metric of the evenness or unevenness of the isotherm distributions. The 4DI index considerably reduced at around the EAIE and other Mi-events, reflecting the evenly distributed isotherms under a more glaciated Antarctica.

DOI

Taxonomy of Maastrichtian–Thanetian Deep-Sea Ostracodes from U1407, IODP Exp 342, off Newfoundland, Northwestern Atlantic, part 2: Families Eucytheridae, Krithidae, Thaerocytheridae, Trachyleberididae, and Xestoleberididae

Tatsuhiko Yamaguchi, Hiroki Matsui, Hiroshi Nishi

Paleontological Research ( The Paleontological Society of Japan )  21 ( 2 ) 97 - 121   2017.04  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Taxonomy of Maastrichtian—Thanetian Deep-Sea Ostracodes from U1407, IODP Exp 342, Off Newfoundland, Northwestern Atlantic, Part 1: Families Cytherellidae, Bairdiidae, Pontocyprididae, Bythocytheridae, and Cytheruridae

Tatsuhiko Yamaguchi, Hiroki Matsui, Hiroshi Nishi

Paleontological Research ( The Paleontological Society of Japan )  21 ( 1 ) 54 - 75   2017.01  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

Changes in the depth habitat of the Oligocene planktic foraminifera ( Dentoglobigerina venezuelana ) induced by thermocline deepening in the eastern equatorial Pacific

Hiroki Matsui, Hiroshi Nishi, Reishi Takashima, Azumi Kuroyanagi, Minoru Ikehara, Hideko Takayanagi, Yasufumi Iryu

Paleoceanography ( American Geophysical Union (AGU) )  31 ( 6 ) 715 - 731   2016.06  [Refereed]

Research paper (journal)   Domestic Co-author

Understanding planktic foraminiferal depth habitat along with consistent taxonomic concepts is key to accurate reconstruction of paleoceanographic records. The Oligocene-Pliocene long-ranging and widely distributed species Dentoglobigerina venezuelana lived in the mixed layer (shallower) during the early Oligocene, whereas the same species calcified at thermocline or subthermocline depths (deeper) during the late Oligocene and Miocene. The exact timing of the species' depth habitat change and its possible relationships with Oligocene climate dynamics remain unknown. Here we reveal isotopic records of D. venezuelana along with the Paragloborotalia siakensis group (a mixed-layer dweller) by using sediments at Integrated Ocean Drilling Program Site U1334 in the eastern equatorial Pacific throughout the Oligocene. A two-step depth habitat change of D. venezuelana is apparent: (1) from upper to lower mixed layer (~27.4 Ma) and (2) from lower mixed layer to thermocline depth (~26.3 Ma). In addition, the planktic foraminiferal faunal assemblage experienced a marked change from dominantly thermocline (deeper) species to abundant mixed-layer (shallower) species, suggesting that depth habitat shifts of D. venezuelana were clearly related to thermocline deepening in the eastern equatorial Pacific. Comparison of the first isotopic shift (~27.4 Ma) at multiple sites (U1334, U1333, and 1218) revealed a southward depth habitat change of D. venezuelana within ~200 kyr, implying overall thermocline deepening with reduced steepness in the eastern equatorial Pacific. We consider that global warming conditions during the late Oligocene likely caused thermocline deepening with upwelling decrease in the eastern equatorial Pacific, guiding D. venezuelana to adapt to greater depths in the water column.

DOI

Resolving Eocene time and palaeoceanography in exceptional detail: an update on IODP Expedition 342, Newfoundland Ridge

Pincelli M. Hull, Philip F. Sexton, Richard D. Norris, Paul A. Wilson, Peter Blum, Claudia Agnini, Slah Boulila, Paul R. Bown, Helen Coxall, Oliver Friedrich, Rosanna Greenop, Sandra Kirtland Turner, Wendy E. C. Kordesch, Diederik Liebrand, Hiroki Matsui, Kazuyoshi Moriya, Hiroshi Nishi, Bradley N. Opdyke, Heiko Pälike, Donald Penman, Ursula Röhl, Richard Smith, Thomas Westerhold, Yuhji Yamamoto, James C. Zachos

Rendiconti online della Società Geologica Italiana ( Societa Geologica Italiana )  31   115 - 116   2014.07  [Refereed]

Research paper (journal)   International Co-author

DOI

Middle Miocene to Pleistocene Planktonic Foraminiferal Biostratigraphy in the Eastern Equatorial Pacific Ocean

Hiroki Hayashi, Kyoko Idemitsu, Bridget S. Wade, Yuki Idehara, Katsunori Kimoto, Hiroshi Nishi, Hiroki Matsui

Paleontological Research ( The Paleontological Society of Japan )  17 ( 1 ) 91 - 109   2013.04  [Refereed]

Research paper (journal)   International Co-author

We present a detailed dataset of planktonic foraminiferal biohorizons to enhance a biostratigraphy for the eastern equatorial Pacific. Middle Miocene to Pleistocene planktonic foraminiferal biostratigraphy is established using 269 samples from Cores 1H to 40H recovered from Integrated Ocean Drilling Program (IODP) Hole U1338B. In addition to the onboard study of Hole U1338A, a total of 60 biohorizons are recognized with three grades of reliability. Generally, these biohorizons are in agreement with each other and consistent with shipboard magnetostratigraphy, except for several discrepancies that may be caused by ecological diachronous processes. The studied sequence can be correlated with Zone M7 to Subzone PT1b. However, we cannot detect Miocene zones M6, M10, and M12 in this sequence because of discrepancies in some zonal marker biohorizons. © 2013 © by the Palaeontological Society of Japan.

DOI

The Motion Decoupled Delivery System: A New Deployment System for Downhole Tools is Tested at the New Jersey Margin

P. B. Flemings, P. J. Polito, T. L. Pettigrew, G. J. Iturrino, E. Meissner, R. Aduddell, D. L. Brooks, C. Hetmaniak, D. Huey, J. T. Germaine, IODP Expedition 342 Scientists

Scientific Drilling ( Copernicus GmbH )  15   51 - 56   2013.03  [Refereed]

Research paper (journal)   International Co-author

The Motion Decoupled Hydraulic Delivery System (MDHDS) is a new downhole tool delivery system that is deployed by wireline and uses drillstring pressure to advance a penetrometer (or other downhole tool) into the formation at the bottom of offshore boreholes. After hydraulic deployment of the penetrometer, it is completely decoupled from the BHA; this eliminates the adverse effects of ship heave. We tested the MDHDS at Site U1402 (the location of Site 1073, ODP Leg 174A), offshore New Jersey, during two days of ship time during Integrated Ocean Drilling Program (IODP) Expedition 342. In one deployment we emplaced a penetrometer successfully and documented that it was decoupled from drillstring movement. Based on this successful field test, the MDHDS has been certified by the U.S. Implementing Organization (USIO) for shipboard use. The MDHDS will replace the previous deployment system, the Colletted Delivery System. The MDHDS is an IODP-funded engineering development led by The University of Texas at Austin, in conjunction with the USIO and Stress Engineering Services. This sea trial was the culmination of a seven-year development effort that included extensive engineering design and fabrication. &lt;br&gt;&lt;br&gt; doi:&lt;a href="http://dx.doi.org/10.2204/iodp.sd.15.07.2013" target="_blank"&gt;10.2204/iodp.sd.15.07.2013&lt;/a&gt;

DOI