全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:... Noritaka Matsubara , Kazuo Amano , Takafumi Hirata
来源:[J].Journal of Asian Earth Sciences(IF 2.379), 2020, Vol.190Elsevier
摘要:Abstract(#br)The Tanakura Basin was formed by strike-slip movement of the Tanakura Fault during the opening of the Sea of Japan in the early to middle Miocene. In this study, we conducted U–Pb and fission-track (FT) double-dating of pyroclastic rocks from two stratigraphic u...
作者:... Alexander M. Popov , Shuhei Sakata , Takafumi Hirata
来源:[J].Journal of Asian Earth Sciences(IF 2.379), 2017, Vol.145, pp.565-575Elsevier
摘要:Abstract(#br)In order to examine paleogeographic link between Primorye and Japan with respect to other continental blocks in East Asia, middle-upper Paleozoic shallow marine sandstones of the Khanka block and Sergeevka belt were analyzed by LA-ICPMS U-Pb dating of detrital z...
作者:... Eiji Sasao , Takafumi Hirata , Tadao Nishiyama
来源:[J].Journal of Asian Earth Sciences(IF 2.379), 2018Elsevier
摘要:Abstract(#br)Understanding the locational differences of time-temperature ( t-T ) paths within the granite contributes to clarifying the detailed formation history, especially the thermal evolution, of the entire pluton after the incipient intrusion of the granitic magma int...
作者:... Tohru Danhara , Marcel Guillong , Takafumi Hirata
来源:[J].Quaternary Geochronology(IF 4.015), 2016Elsevier
摘要:Abstract(#br)We have measured 238 U– 206 Pb, 235 U– 207 Pb, and 232 Th– 208 Pb ages on Quaternary zircons by laser ablation, single-collector, magnetic sector inductively coupled plasma mass spectrometry (LA-ICP-MS). To obtain reliable ages for Quaternary zircons, corre...
作者:... Shuhei Sakata , Takafumi Hirata , Shigenori Maruyama
来源:[J].Journal of Asian Earth Sciences(IF 2.379), 2014, Vol.88, pp.62-73Elsevier
摘要:Abstract(#br)U–Pb ages of detrital zircon grains were determined from an upper Middle Jurassic siliceous mudstone and two lower Upper Jurassic sandstones of the Mino-Tanba belt, Southwest Japan, by Laser-ablation ICPMS. The age spectra of detrital zircon grains of the three ...
作者:... Atsushi Yamamoto , Shuhei Sakata , Takafumi Hirata
来源:[J].Journal of Asian Earth Sciences(IF 2.379), 2015, Vol.97, pp.125-135Elsevier
摘要:Abstract(#br)The Kurosegawa belt in SW Japan preserves fragments of Early–Middle Paleozoic granitoids traditionally called the Mitaki igneous rocks and previously dated ca. 470–435 Ma by several isotope analyses such as Rb–Sr, K–Ar and U–Pb, together with high-grad...
作者:... Kazuhito Yokoyama , Takafumi Hirata , Mayumi Ishizuka
来源:[J].Chemosphere(IF 3.137), 2020, Vol.238Elsevier
摘要:Abstract(#br)Lead (Pb) pollution is one of the most serious environmental problems and has attracted worldwide attention. Pb causes hematological, central nervous system, as well as renal toxicity, and so on. Although many investigations about Pb in blood to evaluate pollution st...
作者:... Yasuhiro Yamanaka , Takafumi Hirata , Hideyuki Nakano
来源:[J].Ecological Modelling(IF 2.069), 2017, Vol.343, pp.1-14Elsevier
摘要:Abstract(#br)To advance our understanding of competition and coexistence in phytoplankton species within a functional group, such as a diatom group, we developed a numerical model composed of 240 within-tropic-level virtual species that can actually or potentially compete. We the...
作者:Takafumi Hirata , Toru Hirawake ...
来源:[J].Remote Sensing of Environment(IF 5.103), 2017, Vol.190, pp.162-177Elsevier
摘要:Abstract(#br)Ocean color remote sensing of chlorophyll concentration has revolutionized our understanding of the biology of the oceans. However, a comprehensive understanding of the structure and function of oceanic ecosystems requires the characterization of the spatio-temp...

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