scholarly journals Metamorphic rocks and granitoids in the Aoyama area, Ryoke belt, SW Japan

2012 ◽  
Vol 118 (Supplement) ◽  
pp. S79-S89 ◽  
Author(s):  
Tetsuo Kawakami ◽  
Yoshiharu Nishioka
Keyword(s):  
Metamorphic Rocks ◽  
Sw Japan

scholarly journals A “coarse-grained” metabasite body newly found in the Sambagawa metamorphic rocks in Kumakogen Town, Ehime Prefecture, SW Japan

2019 ◽  
Vol 125 (6) ◽  
pp. 447-452
Author(s):  
Koki Nakata ◽  
Nao Kusuhashi ◽  
Satoshi Saito ◽  
Hiroaki Ohfuji ◽  
Masakazu Nara
Keyword(s):  
Coarse Grained ◽  
Metamorphic Rocks ◽  
Sw Japan

Extensive normal faulting during exhumation revealed by the spatial variation of phengite K-Ar ages in the Sambagawa metamorphic rocks, central Shikoku, SW Japan

Island Arc ◽  
2015 ◽  
Vol 24 (2) ◽  
pp. 245-262 ◽  
Author(s):  
Toru Takeshita ◽  
Koshi Yagi ◽  
Chitaro Gouzu ◽  
Hironobu Hyodo ◽  
Tetsumaru Itaya
Keyword(s):  
Spatial Variation ◽  
Metamorphic Rocks ◽  
Normal Faulting ◽  
Sw Japan

The significance of Upper Jurassic radiolarians in high pressure metamorphic rocks of SW Japan

1991 ◽  
Vol 6 (2) ◽  
pp. 131-136 ◽  
Author(s):  
M. Faure ◽  
M. Iwasaki ◽  
K. Ichikawa ◽  
A. Yao
Keyword(s):  
High Pressure ◽  
Upper Jurassic ◽  
Metamorphic Rocks ◽  
Sw Japan

TEM/AEM characterization of fine-grained clay minerals in very-low-grade rocks: Evaluation of contamination by empa involving celadonite family minerals

1996 ◽  
Vol 54 ◽  
pp. 694-695
Author(s):  
Gejing Li ◽  
D. R. Peacor ◽  
D. S. Coombs ◽  
Y. Kawachi
Keyword(s):  
Electron Microscopy ◽  
Volcanic Rocks ◽  
Analytical Electron Microscopy ◽  
Metamorphic Rocks ◽  
New Mineral ◽  
Chemical Compositions ◽  
Low Grade ◽  
Fine Grained ◽  
Depth Analysis ◽  
Mineral Aggregates

Recent advances in transmission electron microscopy (TEM) and analytical electron microscopy (AEM) have led to many new insights into the structural and chemical characteristics of very finegrained, optically homogeneous mineral aggregates in sedimentary and very low-grade metamorphic rocks. Chemical compositions obtained by electron microprobe analysis (EMPA) on such materials have been shown by TEM/AEM to result from beam overlap on contaminant phases on a scale below resolution of EMPA, which in turn can lead to errors in interpretation and determination of formation conditions. Here we present an in-depth analysis of the relation between AEM and EMPA data, which leads also to the definition of new mineral phases, and demonstrate the resolution power of AEM relative to EMPA in investigations of very fine-grained mineral aggregates in sedimentary and very low-grade metamorphic rocks.Celadonite, having end-member composition KMgFe3+Si4O10(OH)2, and with minor substitution of Fe2+ for Mg and Al for Fe3+ on octahedral sites, is a fine-grained mica widespread in volcanic rocks and volcaniclastic sediments which have undergone low-temperature alteration in the oceanic crust and in burial metamorphic sequences.

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