2013 Fiscal Year Final Research Report
Magma generation processes by crustal melting at subduction zone with continental crust
| Project/Area Number |
23540555
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kyoto University |
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Principal Investigator |
KANEKO Katsuya 京都大学, 人間・環境学研究科(研究院), 助教 (40335229)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 大陸地殻 / 地殻溶融 / 大規模珪長質マグマ活動 / カルデラ火山 / 島弧火山 |
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| Research Abstract |
We carried out numerical experiments of magma genesis by crustal melting on the basis of physical model where hot magmas injecting into crust repeatedly melt the crust and produce magmas, in order to clarify amount, composition, and generation timescale of magma produced by crustal melting and understand variety of igneous activities in continental margin. The results of the numerical experiments indicate that (1) the initial crustal temperature and injection rate of the hot magmas govern total amount of crustal melt, (2) composition of crustal melt is dominantly affected by the initial crustal temperature and injection thickness of the hot magma, and (3) generation timescale for magmas with more than 1 km3 volume is several ten thousands years. These results are consistent with features of natural igneous activity.
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