Research Project
Grant-in-Aid for Scientific Research (C)
We can not obtain information directly on physical and chemical conditions of the deeply seated crust and mantle in the past, however, the metamorphic rocks formed in a depth provide us numerous information to estimate conditions of its formation. Species and chemical composition of constituent minerals depend on the physical conditions such as temperature and pressure, whereas grain-size of minerals is controlled by thermally activated processes such as grain boudary migration and nucleation-and-growth. These two aspects closely relate each other, even though each view point has been divided into petrology and structural geology. Combination of the two subjects are required to understand physical and chemical behaviour of minerals and rocks beneath the Earth's surface.This study intended to determine physical conditions and kinematic parameters of rocks from several metamorphic regions in the world, including the Ryoke metamorphic rocks in SW Japan, the Dalradian metamorphic rocks in … More Scotland and the Lutzow-Holm Complex in East Antarctica. Several papers contributed to progress the understanding of the deep crust in the following aspects.Metamorphic facies of the Ryoke metamorphism belongs to the granulite facies, contrary to the previous understanding as amphibolite facies. Several problems were pointed out to applying the Gibbs method to low-pressure metamorphic rocks. A new technique to estimate pressure was proposed, and was applied to the Ryoke metamorphic rocks. The results show the thermobaric structure of the metamorphic region more precisely than before. The effect of minor elements in constituent minerals was evaluated with respect to the paragenetic stability. The importance of boron for the partial melting of upper crust was revealed in the Ryoke metamorphic rocks. Limit of geothermometry for high-temperature metamorphic rocks was discussed using samples from the Antarctica. Regional structure of the Lutzow-Holm Complex was characterized. Change in shape and grain-size of metamorphic minerals was revealed based on petrological, mineralogical and structural analyses. This information enabled us to discuss the anisotropic growth of mineral in a deforming media. Less
All 2005 2004 2003 2002 Other
All Journal Article (46 results) Publications (8 results)
Jour Mineral Pertol Science (印刷中)
岩鉱 (印刷中)
10015606236
Jour Mineral Petrol Science (in press)
Japanese Magazine of Mineralogical and Peetrological Scinences (in press)
Jour Mineral Petrol Science (印刷中)
Contrib Mineral Petrol 146
Pages: 577-589
Polar Geoscience 17
Pages: 1-11
Pages: 12-21
110000978236
Pages: 22-34
Pages: 35-44
110000978238
Pages: 45-56
Jour Geol Spc Jpn 110
Antact Geol. Map Ser., Sheet 39 (with explanatory text) 39
Pages: 1-23
地学雑誌 113
Pages: 633-646
10017474181
110000978235
Jour Geol Soc Jpn 110(pictorial)
Antarct. Geol.Map Ser., Sheet 39 (with explanatory text 23p.)(Tokyo, Nati Inst Polar Res.)
J Geography 113
Jour Geol Soc Jpn 110
Antarct Geol Map Ser., Sheet 39 (with explanatory text) 39
J structural Geol 25
Pages: 1341-1342
Contrib Mineral Petrol 145
Pages: 131-150
月刊地球 25
Pages: 185-185
Pages: 222-226
Hutton Symposium V Field Guidebook, Geological Survey of Japan 28
Pages: 23-40
Chikyu monthly 25
Hutton Symposium V Field Guidebook, Geological Survey of Japan, Interim-Report 28
The Island Arc 11
Pages: 142-145
J structural Geol 24
Pages: 1633-1646
Pages: 185-192
10020374791
