@article{oai:nagoya.repo.nii.ac.jp:00026266,
 author = {湯口, 貴史 and 加藤, 丈典 and Yuguchi, Takashi and Kato, Takenori},
 journal = {名古屋大学年代測定研究},
 month = {Mar},
 note = {Zircon crystals of the Toki granitic pluton provide evidence of serial growth events with specific mechanisms, crystallization temperatures, and U-Pb ages. With this evidence we can deduce details of the sequential formation process from intrusion through emplacement to crystallization/solidification. Serial growth events have been identified by: 1) a study of the internal structure of zircon using cathodoluminescence observation, 2) crystallization temperatures using Ti-in-zircon thermometry of the internal structure, and 3) UPb age dating of the internal structure. This paper expounds a procedure for quantitatively determining the titanium concentration in zircon and the results of crystallization temperature measurements based on a Ti-in-zircon thermometer. The magmatic zircons collected from Toki granite display two different internal structures: LLC (low luminescence core) and OZ (oscillatory zonation). The LLC crystallized due to interfacial reaction-controlled growth with the cooling granitic magma under temperature conditions ranging from about 910℃ to about 760℃. The OZ developed due to diffusion-controlled growth within a cooling magma chamber under temperature conditions from about 850℃ to about 690℃., カソードルミネッセンス象観察に基づくジルコンの内部構造の分類， Ti-in-zircon温度計より内部構造ごとの結晶化温度の決定，内部構造ごとのU-Pb年代の決定を組み合わせた研究は，時間・温度の観点からジルコンの成長プロセスを明らかにする．本論文では，2016年にJournal of Mineralogical and Petrological Sciencesに公表されたYuguchi et al. (2016）"Zircon growth in a graniticpluton with specific mechanisms, crystallization temperautres and U-Pb ages: Implication to the 'spatiotemporal' formation process of the Toki granite, central Japan." に関して，EPMAを用いたジルコンのチタン濃度の定量そしてそこから得られた結果について解説を行った．土岐花崗岩体中のマグマ起源のジルコンはカソードルミネッセンス像から2つの領域に区分できる；1つはLLC(low luminescence core）であり，もう1つは OZ(oscillatory zonation）である．それぞれの領域に対してEPMAによるTi濃度の定量分析を実施し， LLCは910℃から760℃の間の反応律速型成長によって，OZは850℃から690℃までの拡散律速型成長により生じたことを明らかにした．},
 pages = {55--62},
 title = {Ti濃度定量による結晶化温度とU-Pb年代から導く花崗岩中のジルコンの形成プロセス : EPMAによるジルコン中のチタン濃度の定量},
 volume = {1},
 year = {2017}
}