Sulphide and oxide minerals from the Ohmine granitic rocks in Kii Peninsula, central Japan, and their primary paragenetic relations

1983 ◽  
Vol 84 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Mamoru Murata ◽  
Tetsumaru Itaya ◽  
Yoshio Ueda
Keyword(s):  
Granitic Rocks ◽  
Central Japan ◽  
Kii Peninsula ◽  
Oxide Minerals

scholarly journals Magnesian igneous enclave in the Ohmine Granitic Rocks of Kii Peninsula

2005 ◽  
Vol 34 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Hironao SHINJOE ◽  
Gen SHIMODA ◽  
Takaaki FUKUOKA ◽  
Tomoaki SUMII
Keyword(s):  
Granitic Rocks ◽  
Kii Peninsula

The Precambrian problem in younger orogenic zones: An example from Japan

1968 ◽  
Vol 5 (3) ◽  
pp. 643-648 ◽  
Author(s):  
Tatsuro Matsumoto ◽  
Masaru Yamaguchi ◽  
Takeru Yanagi ◽  
Susumu Matsushita ◽  
Ichikazu Hayase ◽  
...  
Keyword(s):  
Radiometric Dating ◽  
Granitic Rocks ◽  
Northwestern Part ◽  
Precambrian Basement ◽  
Early Paleozoic ◽  
Central Japan ◽  
Field Evidence ◽  
Orogenic Zone

We have examined some of the presumed Precambrian basement metamorphic and granitic rocks in Japan, through radiometric dating as well as on field evidence, and have found that mineral ages of about 175 to 250 m.y. are abundant in the Hida area, northwestern part of central Japan, that a number of thrust rocks in southwestern Japan show ages of 400 to 450 m.y., and that the oldest of the measured samples is about or somewhat over 500 m.y. Little evidence is available to support a view that the Pre-Sinian rocks, if ever existent, have remained unaltered under such a polycyclic orogenic zone as that represented by Japan, although remnants of the youngest Precambrian to Early Paleozoic cycle can be detected.

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