{"title":"高圧下でのマグマ物性:地球深部でのマグマの挙動解明;高圧下でのマグマ物性:地球深部でのマグマの挙動解明;Properties of magma at high pressures: Understanding the magma behavior in the interior of the Earth","authors":"Tatsuya Sakamaki","doi":"10.2465/GKK.160803","DOIUrl":"https://doi.org/10.2465/GKK.160803","url":null,"abstract":"Magma has been deeply related to the evolution and dynamics of the Earth from the magma ocean in the early Earth to present magmatism. Especially, a hot topic is a pressure-induced change in the property/structure of magma and its correlation to the macroscopic property and microscopic structure, with the goal of understanding the deep magma. This article introduces our studies about high-pressure measurements of magma properties with focusing on three topics. First one is the gravitational stability of hydrous magma at the base of the upper mantle based on density measurements at high pressure. Our results indicated a rapid reduction of the partial molar volume of H2O in magma with pressure, which causes enough densiˆcation of hydrous magma to be stagnant. Second, we proposed the ponded magma model at the lithosphere-asthenosphere boundary due to a decrease in the segregation rate. This model can illustrate the geophysically observed anomaly around the boundary. For density measurement of magmas under desired conditions, we succeeded in applying an X-ray absorption technique, which could provide a better understanding of magma behavior. Last topic is lunar magmatism. Compression behavior of lunar basaltic magma with high TiO2 content indicated the density crossover between the magma and lunar mantle at a certain depth. Based on this result, subducted magma could create lateral chemical heterogeneities in the lunar mantle and, moreover, it could form the low-velocity/low-viscosity layer at the base of lunar mantle.","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"46 1","pages":"30-34"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77651170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kinetic study on the non-equilibrium processes in petrology","authors":"T. Nishiyama","doi":"10.2465/GKK.161202","DOIUrl":"https://doi.org/10.2465/GKK.161202","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"2 1","pages":"15-29"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88390869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experiments on the simultaneous partitioning of divalent cations between pyrite or pyrrhotite and 2M aqueous chloride solution under supercritical conditions","authors":"E. Uchida, Yusuke Hata, H. Uemura","doi":"10.2465/GKK.161219","DOIUrl":"https://doi.org/10.2465/GKK.161219","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"163 1","pages":"124-134"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73151801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sakura texture in quartz crystals from Obira mine, Oita prefecture, Japan","authors":"T. Okada, T. Nagase, Hiroyuki Imai, S. Uehara","doi":"10.2465/GKK.170618","DOIUrl":"https://doi.org/10.2465/GKK.170618","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"11 1","pages":"117-123"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89445619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New three allanite-group minerals from the Shobu, Ise, Mie Prefecture, Japan","authors":"M. Nagashima","doi":"10.2465/GKK.151119","DOIUrl":"https://doi.org/10.2465/GKK.151119","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"29 1","pages":"38-42"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91095130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Variation and evolution of vietnamese metamorphic rocks","authors":"N. Nakano","doi":"10.2465/GKK.151215B","DOIUrl":"https://doi.org/10.2465/GKK.151215B","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"7 1","pages":"26-32"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75573608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"会長挨拶;会長挨拶;Message from the President","authors":"A. Tsuchiyama","doi":"10.2465/gkk.45.155","DOIUrl":"https://doi.org/10.2465/gkk.45.155","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"34 1","pages":"155"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80648704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"New minerals and occurrences in Japan (2015)","authors":"S. Matsubara","doi":"10.2465/gkk.45.99","DOIUrl":"https://doi.org/10.2465/gkk.45.99","url":null,"abstract":"","PeriodicalId":34971,"journal":{"name":"Japanese Magazine of Mineralogical and Petrological Sciences","volume":"24 1","pages":"99-100"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87054779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}