Takafumi Hirata 研究室

主宰者：Takafumi Hirata

東京大学

AI 要約（直近 5 年の研究成果）

Takafumi Hirata研究室は、質量分析計を用いた微量成分分析と岩石・鉱物の年代測定を中心に研究を展開しています。特に、レーザーを使って試料を微小領域で加熱・蒸発させ、その成分を質量分析計で測定する手法（レーザーアブレーション誘導結合プラズマ質量分析法）を駆使しています。この分析技術により、鉱物内の元素分布を画像化したり、極めて少量の試料から正確な年代値を決定したりすることが可能になります。研究室の主な関心は、地球の成り立ちや変動の歴史を解明することにあります。日本列島の日本海形成時期や火山活動の年代、地殻の構成物質の結晶化時期など、地質学的な重要な問題に対して、鉱物に含まれるウラン・鉛比の測定を通じて定量的な証拠を提供しています。同時に、火山灰や砕屑物に含まれる鉱物粒子の年代分布を調べることで、岩石の堆積環境や供給源を推定する研究も行っています。さらに、気体試料の分析法開発や、天体物質（隕石）・脳組織などの特異な試料への応用研究も進めており、分析手法の拡張を通じて新たな科学的知見を生み出す取り組みも特徴的です。

※ AI（Claude）が、公開されている論文要旨から研究の問い・手法・主要な発見を事実情報として抽出・再構成して自動生成しています。誤りを含む可能性があるため、正確性は研究室公式情報でご確認ください。

外部リンク

研究成果（100 件）

[2026] Simultaneous detection of elements and molecules using laser ablation-ICP-MS/MS
DOI: https://doi.org/10.1007/s44211-025-00862-1
[2026] High Speed Elemental Analysis Using ICP-Time of Flight-Mass Spectrometry
DOI: https://doi.org/10.5702/massspec.25-031
[2026] Stratigraphic and tectonic implications of the Middle Miocene Shichiyama Formation, Tottori Group, eastern Tottori Prefecture, Japan
DOI: https://doi.org/10.9795/bullgsj.77.1_1
[2026] Rodingite diversity as a record of complex geological evolution during oceanic plateau accretion: insights from the Mikabu Unit, southwest Japan
DOI: https://doi.org/10.1016/j.jseaes.2026.107197
[2026] Direct Detection of Volatile Organic Compounds through Cationization Using ICP-MS/MS
DOI: https://doi.org/10.5702/massspectrometry.a0187
[2025] Miocene dextral movement on the Tanakura fault zone, Japan: strike-slip fault inversion due to arc–arc collision
DOI: https://doi.org/10.1186/s40645-025-00762-y
[2025] Oxygen isotope-magnetostratigraphy combined with zircon U–Pb dating for the Upper Pliocene composite marine succession in central Japan: Implications for the warm Pliocene deep-water current system on the northwestern Pacific margin
DOI: https://doi.org/10.1127/nos/2025/0874
[2025] Extreme maldistribution of high field strength elements along subduction zones revealed by baddeleyite aggregates in serpentinite
DOI: https://doi.org/10.1038/s41598-025-07698-9
[2025] Long-lasting thermal activity on the brachinite parent body revealed by mineralogy, REE chemistry, and U–Pb dating of Ca-phosphates in Northwest Africa 10932
DOI: https://doi.org/10.1016/j.gca.2025.05.022
[2025] Early Miocene hornblende rhyolite in the Yoka Formation in the Hamasaka area, Hyogo Prefecture, Japan
DOI: https://doi.org/10.5575/geosoc.2025.0016

続きを表示（残り 90 件）

[2025] Age of the stratigraphic boundary between the Yamanouchi and Motegi formations of the Miocene Nakagawa Group in Motegi Town, Tochigi Prefecture, Japan
DOI: https://doi.org/10.5575/geosoc.2025.0036
[2025] From spreading to subduction: Timelines of induced subduction zones recorded in the Central Palawan Ophiolite
DOI: https://doi.org/10.1016/j.lithos.2025.108346
[2025] Constraints on the depositional age in the type locality of the lower part of the Hakobuchi Formation, Yezo Group, Hokkaido
DOI: https://doi.org/10.5575/geosoc.2025.0023
[2025] Mechanism of elemental fractionation during femtosecond laser ablation revealed by high-time-resolution MC-ICP-MS analysis of 208 Pb/ 232 Th ratios in single particles
DOI: https://doi.org/10.1039/d5ja00016e
[2025] Carbon isotope stratigraphy for regional correlation of the Upper Jurassic–Lower Cretaceous Tetori Group in Japan
DOI: https://doi.org/10.1016/j.cretres.2025.106164
[2025] Depositional age of the Lower–Middle Miocene Tanabe Group constrained by detrital zircon U–Pb ages and its implications for stress field
DOI: https://doi.org/10.5575/geosoc.2025.0003
[2025] Revision of the age of the “Upper Miocene” Mitoku Formation in Misasa Town, south-central Tottori Prefecture, western Japan
DOI: https://doi.org/10.5575/geosoc.2025.0005
[2025] Hybrid Ionisation Mass Spectrometry for Simultaneous Imaging of Elements and Molecules
DOI: https://doi.org/10.5702/massspec.24-023
[2025] Dual mass spectrometers with plasma-based ion sources for multiplex imaging of elements and biomolecules
DOI: https://doi.org/10.1039/d5ja00039d
[2025] Zircon Crystallization Timings of Granitoids in the Aoyama Area, Ryoke Belt, Southwest Japan
DOI: https://doi.org/10.1111/iar.70022
[2025] Zircon U-Pb dates from Lower Miocene rhyolitic welded tuffs in the Hokuriku region, central Japan: Implications for silicic volcanism prior to the opening of the Sea of Japan
DOI: https://doi.org/10.2465/jmps.250214
[2025] Emplacement and Cooling History of a Pluton With Evident Laminated Structure Constrained by Field Anatomy of the Kinpusan Pluton, Central Japan
DOI: https://doi.org/10.1111/iar.70014
[2025] Elemental Analysis of Individual Small Particles Collected from Primitive Chondrites using ICP-TOF-MS Coupled with Laser Ablation in Liquid Technique
DOI: https://doi.org/10.7185/gold2025.32168
[2025] Assessing the Reliability of Bioapatite U–Pb Dating in Pelagic Clay: A Case Study from western North Pacific Ocean
DOI: https://doi.org/10.7185/gold2025.30384
[2025] Hybrid approach based on trace-element mapping and 190 Pt– 186 Os and 187 Re– 187 Os age determination of placer platinum-group minerals
DOI: https://doi.org/10.7185/gold2025.30326
[2025] Secular variation of seawater phosphate through geologic time
DOI: https://doi.org/10.1130/abs/2025am-5621
[2025] Zircon fission-track and U–Pb double dating for pyroclastic rocks, Hantarozawa Formation, filled in Nodai caldera, Shimokita Peninsula, Aomori Prefecture
DOI: https://doi.org/10.5575/geosoc.2025.0031
[2024] Detection of several volatile organic compounds through Ar + induced chemical ionisation using inductively coupled plasma-tandem mass spectrometry (ICP-MS/MS)
DOI: https://doi.org/10.1039/d4an00996g
[2024] An age constraint on the Miocene succession in the Kinbusan area, eastern Tottori Prefecture, Japan: Uranium–lead dating of zircons from an ash-fall tuff
DOI: https://doi.org/10.5575/geosoc.2024.0027
[2024] Re-evaluation of chronostratigraphy of the Neogene system, distributed in western Shimokita Peninsula, Aomori Prefecture and proposal of Hotokegaura Caldera
DOI: https://doi.org/10.5575/geosoc.2024.0007
[2024] Molecular environment in Alzheimer’s disease brain revealed by the hybrid imaging analyses
DOI: https://doi.org/10.1002/alz.093362
[2024] Photothermal Dry Reforming of Methane on Yolk‐Shell Co–Ni Alloy@SiO2 Catalyst
DOI: https://doi.org/10.1002/cctc.202401396
[2024] Late dry back-arc magmatism recorded as dolerite dike intrusion in the Mado Megamullion, Shikoku Basin
DOI: https://doi.org/10.2343/geochemj.gj24016
[2024] Effect of trace-element of TlBr semiconductors and charge transport properties of TlBr detectors
DOI: https://doi.org/10.1109/nss/mic/rtsd57108.2024.10654849
[2024] Integration of new zircon U–Pb ages with biostratigraphy to establish a high-precision age model of the Miocene Nakayama Formation on Sado Island in Central Japan
DOI: https://doi.org/10.1186/s40645-024-00651-w
[2024] Deciphering the uranium isotopic signature of coastal water and sediments from Tokyo Bay using a multi-collector inductively coupled plasma mass spectrometer
DOI: https://doi.org/10.1016/j.eti.2024.103761
[2024] Origin of the Hida Belt, Central Japan, with Respect to the Late Triassic Granitoids-bearing Cretaceous Provenance: U–Pb Dating and Trace Element Geochemistry of Detrital Zircons in Tetori Sandstones
DOI: https://doi.org/10.5026/jgeography.133.195
[2024] Distribution analysis of rare earth elements in fine‐grained <scp>CAIs</scp> of the Allende meteorite using multiple‐spot femtosecond <scp>LA‐ICP‐MS</scp>
DOI: https://doi.org/10.1111/maps.14190
[2024] Geochemical Characteristics and U–Pb Dating of Granites in the Western Granitoid Belt of Thailand
DOI: https://doi.org/10.3390/geosciences14050135
[2024] Variation in the relationship between odd isotopes of tin in mass-independent fractionation induced by the magnetic isotope effect
DOI: https://doi.org/10.1073/pnas.2321616121
[2024] Interplay of dietary diversity and mobility of the Late Neolithic people in the Central Plains of China: multi-isotope analysis at the Haojiatai site
DOI: https://doi.org/10.1537/ase.240610
[2024] Cretaceous to early Paleogene sediment provenance transition from continental to magmatic arc systems in the Northwestern Pacific Region
DOI: https://doi.org/10.1038/s41598-024-55471-1
[2024] Tako brecciastone-bearing mudstone layer in the southern coastal region of the Kii Peninsula, southwestern Japan — its age and the formation process —
DOI: https://doi.org/10.5575/geosoc.2023.0034
[2024] Standard Definitions of Terms Related to Mass Spectrometry (Additional Edition 2024)
DOI: https://doi.org/10.5702/massspec.s24-02
[2024] Zircon FT and U–Pb ages of Neogene tuffs and tuffaceous sandstones and their stratigraphic implication in Memanbetsu and adjacent areas, Hokkaido, Japan
DOI: https://doi.org/10.5575/geosoc.2023.0032
[2023] Size Analysis of Silver and Gold Nanoparticles Using Laser Ablation Single Particle ICP Mass Spectrometry: Evaluation of the Laser-Induced Disintegration of Nanoparticles
DOI: https://doi.org/10.5702/massspectrometry.a0116
[2023] A reaction cell as a sample introduction portal for detection of gaseous components in ICP-MS
DOI: https://doi.org/10.1039/d3ja00334e
[2023] The Age of the Lower Tuff in the Utaosa Rhyolite, Teragi Cauldron, southwest Japan:Uranium‒lead dating of Late Pliocene zircon using femtosecond laser ablation-inductively coupled multi-collector ICP mass spectrometry
DOI: https://doi.org/10.5575/geosoc.2023.0002
[2023] Dispersion Function of a Protein, DP‐1, Identified inCollimonas sp. D‐25, for the Synthesis of Gold Nanoparticles
DOI: https://doi.org/10.1002/cbic.202300221
[2023] Discharge timing and origin of fluids at methane seeps in the late Cretaceous subduction zone of Hokkaido, Japan: Coupling U–Pb calcite dating with Sr–Nd isotope analysis
DOI: https://doi.org/10.1016/j.chemgeo.2023.121553
[2023] Geochronological and petrological investigations of Miocene felsic igneous rocks in the Amakusa Islands, southwest Japan: Possible extension of the Setouchi Volcanic Belt
DOI: https://doi.org/10.1111/iar.12506
[2023] Paleogene formations in the northwestern part of Mihara City, Hiroshima Prefecture, south–central part of the Chugoku Region, Japan: Lithofacies and zircon U–Pb ages of interbedded fine tuff
DOI: https://doi.org/10.5575/geosoc.2023.0030
[2023] Depositional condition of Paleoproterozoic Francevillian carbonate rocks revisited from rare earth element contents
DOI: https://doi.org/10.1016/j.gsf.2023.101771
[2023] Thermochronology of hydrothermal alteration zones in the Kii Peninsula, southwest Japan: an attempt for detecting the thermal anomalies and implications to the regional exhumation history
DOI: https://doi.org/10.1186/s40623-023-01921-5
[2023] Development of Organic Matrix-based Standard Samples for Quantitative Analysis of Various Trace Element by Femtosecond Laser Ablation-ICP-mass Spectrometry
DOI: https://doi.org/10.2116/bunsekikagaku.72.463
[2023] U–Pb dating for zircons from granitic rocks in southwestern Cambodia
DOI: https://doi.org/10.1016/j.heliyon.2023.e19734
[2023] Size Uncertainty in Individual Nanoparticles Measured by Single Particle Inductively Coupled Plasma Mass Spectrometry
DOI: https://doi.org/10.3390/nano13131958
[2023] BioQuant: Data Processing Software for Simultaneous Imaging Analysis for Elements and Molecules Using Two Mass Spectrometers
DOI: https://doi.org/10.5702/massspectrometry.a0125
[2023] Basin structure, depositional age, and paleostress of the lower Miocene Yoka Formation in the Tajima-Mihonoura area, Southwest Japan
DOI: https://doi.org/10.5575/geosoc.2022.0053
[2023] Multiple timings of garnet-forming high-grade metamorphism in the Neoproterozoic continental collision zone revealed by petrochronology in the Sør Rondane Mountains, East Antarctica
DOI: https://doi.org/10.1016/j.gr.2023.03.014
[2023] Direct Analysis of Bio-Molecules in Solid Materials Using Electrospray Ionisation Mass Spectrometry Coupled with Laser Ablation and a Liquid Sampling Technique
DOI: https://doi.org/10.5702/massspectrometry.a0121
[2023] Standard Definitions of Terms Related to Mass Spectrometry (Additional Edition 2023)
DOI: https://doi.org/10.5702/massspec.s23-05
[2023] Kinetics and pulses of zircon growth in migmatites beneath a volcanic arc: An example from the high‐T Ryoke Complex, southwest Japan
DOI: https://doi.org/10.1111/jmg.12711
[2023] Late<scp>Triassic A</scp>‐type granite boulders in Lower Cretaceous conglomerate of the<scp>Hida belt, Japan</scp>: Their origin and bearing on the<scp>Yamato</scp>tectonic line in<scp>Far East Asia</scp>
DOI: https://doi.org/10.1111/iar.12475
[2023] Late Cretaceous–Paleogene terrestrial sequence in the northern <scp>Kitakami Mountains</scp>, <scp>Northeast Japan</scp>: Depositional ages, clay mineral contents, and vitrinite reflectance
DOI: https://doi.org/10.1111/iar.12500
[2023] Elemental and isotopic signatures of individual particles in chondrite matrix using inductively coupled plasma mass spectrometry
DOI: https://doi.org/10.2343/geochemj.gj23015
[2023] Quantitative imaging of trace elements in solid samples by online isotope dilution laser ablation-inductively coupled plasma-mass spectrometry
DOI: https://doi.org/10.1039/d3an01028g
[2023] U–Pb and fission‐track dating of <scp>Miocene</scp> hydrocarbon source rocks in the <scp>Akita Basin, Northeast Japan</scp>, and implications for the timing of paleoceanographic changes in the sea of <scp>Japan</scp>
DOI: https://doi.org/10.1111/iar.12490
[2023] 3d-Tectonothermal Structure of Deeply Subducted Materials Revealed in the Akaishi Mountains, Nagano, Japan: Implications for Izanagi–Pacific Ridge Subduction and Exhumation Tectonics
DOI: https://doi.org/10.2139/ssrn.4370674
[2023] Calcium Isotope and Elemental Differences between Medullary and Cortical Bones in Domestic Chicken
DOI: https://doi.org/10.2485/jhtb.32.127
[2023] Micron-resolution trace element imaging analysis utilising multiple-spot femtosecond laser ablation-ICP-mass spectrometry
DOI: https://doi.org/10.7185/gold2023.19482
[2023] Elemental Analysis on Individual Nanoparticles in Meteorites using ICP Time-of-Flight Mass Spectrometry
DOI: https://doi.org/10.7185/gold2023.16348
[2022] Decoupling of U–Pb ages and compositional zoning of garnet in a high–pressure marble from the eastern Iratsu body, Sanbagawa metamorphic terrane, Japan
DOI: https://doi.org/10.2465/jmps.210814
[2022] A new gain calibration protocol for Faraday amplifiers equipped with a 10 13 Ω resistor
DOI: https://doi.org/10.1039/d1ja00351h
[2022] Distribution of rare-earth elements in fine-grained Calcium and Aluminum-rich inclusions from Allende meteorite.
DOI: https://doi.org/10.46427/gold2022.11583
[2022] In situ U-Th disequilibrium dating of Quaternary zircon samples utilising multiple-spot femtosecond laser ablation-ICP-triple quadrupole mass spectrometry
DOI: https://doi.org/10.46427/gold2022.10766
[2022] Development of an In Situ<scp>U‐Th</scp> Disequilibrium Dating Method Utilising <scp>Multiple‐Spot</scp> Femtosecond Laser <scp>Ablation‐CRC‐ICP‐MS</scp>
DOI: https://doi.org/10.1111/ggr.12458
[2022] Historical changes of 236U/238U and 235U/238U isotopic ratios in Tokyo Bay from the 1960s to the 2000s
DOI: https://doi.org/10.1016/j.jenvrad.2022.107011
[2022] Geochemical and radiogenic isotopic signatures of granitic rocks in Chanthaburi and Chachoengsao provinces, southeastern Thailand: Implications for origin and evolution
DOI: https://doi.org/10.1016/j.jaesx.2022.100111
[2022] Depth‐Profiling Determinations of Rare Earth Element Abundances and U‐Pb Ages from Zircon Crystals Using Sensitivity‐Enhanced Inductively Coupled Plasma‐Time of Flight‐Mass Spectrometry
DOI: https://doi.org/10.1111/ggr.12446
[2022] Extensional stress accompanied by Miocene near-trench magmatism in the southern Kii Peninsula, SW Japan
DOI: https://doi.org/10.1016/j.jseaes.2022.105266
[2022] Chemical Analysis of Individual Fine Particles Using a Time-of-Flight Based ICP-MS
DOI: https://doi.org/10.2116/bunsekikagaku.71.277
[2022] The Origin and Sediment Provenance Transition in the Paleo-Kuril Arc, Northeastern Japan, Indicated by Detrital Zircon U-Pb Geochronology: Implication for Plate Configuration in the Northwestern Pacific Region since Late Cretaceous
DOI: https://doi.org/10.5281/zenodo.6339941
[2022] Raw Data of U-Pb LA-ICP-MS Detrital Zircon Measurement (Data Set S1) and U-Pb LA-ICP-MS Detrital Zircon Data (Data Set S2)
DOI: https://doi.org/10.5281/zenodo.6339810
[2022] Improvement of spatial resolution of elemental imaging using laser ablation-ICP-mass spectrometry
DOI: https://doi.org/10.1007/s44211-022-00085-8
[2022] Standard Definition of Terms Relating to Mass Spectrometry (Additional Edition 2022)
DOI: https://doi.org/10.5702/massspec.s22-11
[2022] Sedimentological and geochemical properties of authigenic carbonates in Kyushu, Japan: Implications for the transition from semi-arid to humid climate during the Eocene
DOI: https://doi.org/10.1016/j.sedgeo.2022.106280
[2022] Activity Report of the Division of Isotope-Ratio Mass Spectrometry 2013–2021
DOI: https://doi.org/10.5702/massspec.s22-19
[2022] Zircon U–Pb–Hf Isotopic and Trace Element Analyses for Oceanic Mafic Crustal Rock of the Neoproterozoic–Early Paleozoic Oeyama Ophiolite Unit and Implication for Subduction Initiation of Proto-Japan Arc
DOI: https://doi.org/10.3390/min12010107
[2022] Origin and evolution of the <scp>Paleo‐Kuril</scp> arc inferred from detrital zircon <scp>U–Pb</scp> chronology in eastern <scp>Hokkaido</scp>, <scp>NE Asia</scp>
DOI: https://doi.org/10.1111/iar.12458
[2022] The Origin and Sediment Provenance Transition in the Paleo-Kuril Arc, Northeastern Japan, Indicated by Detrital Zircon U-Pb Geochronology: Implication for Plate Configuration in the Northwestern Pacific Region since Late Cretaceous
DOI: https://doi.org/10.5281/zenodo.7118562
[2021] Geochemical characteristics of back-arc basin lower crust and upper mantle at final spreading stage of Shikoku Basin: an example of Mado Megamullion
DOI: https://doi.org/10.1186/s40645-021-00454-3
[2021] Early Cretaceous partial melting recorded by pelitic gneiss from the Nagasaki Metamorphic Complex, western Kyushu, Japan: initiation of Cretaceous high-Tmetamorphism at eastern margin of Eurasia
DOI: https://doi.org/10.1080/00206814.2021.1961104
[2021] Research and Development of a Supporting Information System for Optimization of Salmon Release Operations and Monitoring the Coastal Environment on the Okhotsk Coast, Japan
DOI: https://doi.org/10.23849/npafctr17/154.156.
[2021] Electron Multiplier and Daly Detector
DOI: https://doi.org/10.5702/massspec.s21-38
[2021] A direct evidence for disturbance of whole sediment layer in the subducting Pacific plate by petit-spot magma–water/sediment interaction
DOI: https://doi.org/10.1016/j.margeo.2021.106712
[2021] Development of a Continuous Sampling Technique Based on Laser Ablation in Liquid (CLAL) for the Realtime-elemental Analysis of Solid Materials Using an ICP-MS
DOI: https://doi.org/10.2116/bunsekikagaku.70.729
[2021] Size and isotopic ratio measurements of individual nanoparticles by a continuous ion-monitoring method using Faraday detectors equipped on a multi-collector-ICP-mass spectrometer
DOI: https://doi.org/10.1039/d1ja00312g
[2021] Microchannel Plate
DOI: https://doi.org/10.5702/massspec.s21-39
[2021] Geochemical constraints on the formation of chondrules: Implication from Os and Fe isotopes and HSE abundances in metals from CR chondrites
DOI: https://doi.org/10.1016/j.gca.2021.11.009

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AI 要約（直近 5 年の研究成果）

外部リンク

関連研究室(8 件)

研究成果（100 件）

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