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Crystallization processes of quartz in a granitic magma: Implications for the magma chamber processes of Okueyama granite, Kyushu, Japan
No full textCathodoluminescence (CL) characterization combined with titanium concentration of quartz crystals in granite is a prevalent tool for elucidating the crystal growth of quartz in granitic magmas. The CL pattern yields to the internal structure, and the titanium concentration allows crystallization temperature determination based on TitaniQ geothermometry. Using two approaches, 1) observations of quartz crystals using thin sections and 2) observations based on multiple sections of separated quartz, we identified the overall characteristics of quartz crystals within a magma chamber and the 3D internal structure and growth characteristics of quartz grains. Thin section observations allow for the characterization of quartz containing zircon inclusions, indicating that zircon crystallization was followed by quartz crystallization; therefore, the onset of quartz crystallization occurred later than the onset of zircon crystallization in the cooling magma chamber. Such petrological restrictions permit allow for suitable geothermometer use and appropriate TiO2 activity estimation, and thus, accurate quartz crystallization temperature determination. Observations using multiple sections of separated quartz crystals provide 3D internal structures and true onset parts within the grains. Progressive variation in local activities of TiO2 in the concentration boundary layer at the growing quartz crystal interface in the magma chamber can be evaluated using a combination of the crystallization temperature and variations in titanium concentration within the grain, yielding a sequential crystallization model of oscillatory zoning quartz with local activities of TiO2 in the cooling magma chamber. The difference in CL characteristics and crystallization temperature among the lithofacies in granite contributes to clarifying the spatiotemporal magma chamber processes.journal articl
Identification of the antidepressant effect of electroconvulsive stimulation-related genes in hippocampal astrocyte
No full texthttps://www.sciencedirect.com/science/article/am/pii/S0022395624000049journal articl
Reflections from a mock citizen workshop,‘On the amendment of the Hotel Business Act’(1) : Results of providing information and discussion on infectious disease control measures
Get PDFThis paper (first report)describes the implementation plan and an overview of the results of a mock citizen workshop, ‘On the amendment of the Hotel Business Act,' held from October to December 2023. This workshop aims to examine what changes would occur in the content of the opinion exchange and participants’ awareness if we provided information regarding infectious disease control measures by stages before the small-group discussions. We will summarize the implications of the results of this workshop in the second report.departmental bulletin pape
Assessment and psychological care practices for children after the 2016 Kumamoto Earthquake
Get PDFThe Kumamoto earthquake, which had a foreshock on April 14, 2016, and the main shock on April 16, had two seismic intensities of 6- and three seismic intensities of 6- (as of January 31, 2017). Another major feature of this earthquake was the more than 4,300 aftershocks that occurred in one year. This paper summarizes how the teachers and staff at A Elementary School, which sustained severe damage from the Kumamoto earthquake, responded to the restoration of school education immediately after the disaster, and how they have been involved in the "mental care" of students who were deeply hurt by the disaster, based on three stages of psychological support services. When responding to disasters and providing mental care, it is necessary to prepare planned and step-by-step response measures from the perspective of prediction and forecasting for disaster responses during peacetime.departmental bulletin pape
Development of A Learning Program In A Teacher Training Course That Provides A Class Image of "Problem Solving Through Programming of Interactive Content"
Get PDFTeachers have many difficulties in teaching D(2) in the field of Technology and Home economics. In addition, students in teacher training courses have no experience of studying D(2) in junior high school, so they do not have a concrete image of how to teach D(2). Therefore, when they become technology teachers, they may have difficulty teaching D(2). In order to solve these problems, this study examined and developed a learning program that helps the students in teacher training to imagine how to teach D(2). The study then implemented the developed learning program for the students aiming to obtain a technology teaching license. As a result, it became clear that experiencing content production from the perspective of a learner (junior high school student) was effective in helping students imagine how to teach D(2).departmental bulletin pape
