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Volume 46 (1961)
- Issue 6 Pages 191-
- Issue 5 Pages 147-
- Issue 4 Pages 101-
- Issue 3 Pages 65-
- Issue 2 Pages 33-
- Issue 1 Pages 1-
Volume 46, Issue 6
Displaying 1-7 of 7 articles from this issue
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Haruo Shirozu, Tometaro Ogawa, Nobuya Tanaka, Michitoshi Miyahisa1961 Volume 46 Issue 6 Pages 191-195
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSBrucite from Sasaguri occurs as foliated or fibrous aggregates, associating with calcite and yellowish serpentine. H=2.5; S.G=2.475; ω=1.562, ε=1.581. Chemical analysis gives: SiO2 0.33, Al2O3 0.08, Fe2O3 1.69, MgO 64.81, MnO 1.10, H2O(-)0.39, H2O(+)31.38, total 99.78. X-ray powder data and D. T. A. curve are also given. The mineral seems to have been formed under hydrothermal condition.View full abstractDownload PDF (589K) -
Kozo Saito1961 Volume 46 Issue 6 Pages 196-201
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSThe author have investigated the crystallinity of galena by means of x-ray spectrometer. It was found that galena showed structural plasticity on heating and grinding. The main results obtained were as follows:
(1) Recrystallization of galena on gentle heating was clearly observed from diffraction peak profile, and the crystallinity was increased in increasing with heating temperature.
(2) Disordered galena because of soluble minor impurities showed lattice expansion on heating.
(3) Crystallinity was destroyed by grinding and was recovered on heating again, and structural plasticity of galena was observed.View full abstractDownload PDF (325K) -
Toshio Igarashi1961 Volume 46 Issue 6 Pages 202-207
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSDownload PDF (715K) -
Geology and granite in the vicinity of IchifusayamaNoboru Ôba1961 Volume 46 Issue 6 Pages 208-212
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSThe Ichifusayama granite situating in the border of Kumamoto and Miyazaki Prefectures intrudes discordantly into the basement sedimentaries (Yuyama formation) which are mainly composed of phyllite and sandstone and accommpanied by schalstein and chert, and can be correlated to a part of the Shimanto Group.
The mass can be divided regionally and petrographically into Fûnokiharu-and Ikenomoto-type, both types include various xenoliths in wide area. The later is richer in xenolith than the former. Ikenomoto-type granite and its xenolith are closely related.View full abstractDownload PDF (654K) -
Jun Watanabe1961 Volume 46 Issue 6 Pages 213-222
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSIn this paper is presented a detailed subdivision of socalled gabbro-amphibolite zone of the Hidaka metamorphic belt, the axis of island of Hokkaido.
It is composed of four tectonic units which are arranged in the following order from west to east, as is shown in figure I. 1) green schist zone, 2) epidote amphibolite zone, 3) green hornblende schistose amphibolite zone and 4) saussurite gabbro zone.
Concerning zones 1), 2) and 3), their original rock facies are not clearly determinable.
The zone of saussurite gabbro is composed of three varieties of amphibolite, a) hornblende schist facies, b) coarse grained amphibolite (=metasomatic) facies and c) compact amphibolite facies, all of which are derived from saussurite gabbro.
In such a diverse metamorphic process, the different characters of tectonic forces and combined metasomatic effects have been the chief determinants.View full abstractDownload PDF (1912K) -
Keiichi Omori, Tadamichi Kubo1961 Volume 46 Issue 6 Pages 223-225
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSDownload PDF (134K) -
Masatomo MUCHI, Yoshiaki HOSHINO1961 Volume 46 Issue 6 Pages 226-234
Published: December 05, 1961
Released on J-STAGE: August 07, 2008
JOURNAL FREE ACCESSBarite including a little of strontia has been found in roseki from the mine, and it is not seemed to be associated with sericite from the experiments. The roseki from the mine is mostly composed of kaolinite, dickite and sericite, and is often accompanied with diaspor as accessories.View full abstractDownload PDF (709K)
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