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Volume 35, Issue 8
Displaying 1-3 of 3 articles from this issue
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Shinji TAKAHASHI1983 Volume 35 Issue 8 Pages 281-303
Published: 1983
Released on J-STAGE: September 14, 2010
JOURNAL FREE ACCESSThermomagnetic properties, lattice constants and optical properties of Fe-Ti oxide minerals contained in 31 submarine basalt samples from the Shikoku basin (Site 443 of DSDP Leg 58) were studied. It seems to be clarified by this work that the magnetic properties are not dependent on depth from sub-bottom at the drilling site but on their lithological facies. As the result of the thermomagnetic analysis of the magnetic minerals separated magnetically from these samples, they were classified in four types (i. e. 1. reversible 2. semi-irreversible 3. irreversible 4. high Curie temperature). Specimens in the irreversible type seems to be reconstituted by a certain heat treatment. This fact shows us the necessity of reconsideration of the mechanism of a thermo-chemical change in low temperature-oxidized (non-stoichiometric) minerals.View full abstractDownload PDF (7038K) -
Yinn-Mien HUANG1983 Volume 35 Issue 8 Pages 305-313
Published: 1983
Released on J-STAGE: September 14, 2010
JOURNAL FREE ACCESSThe ionospheric scintillation data obtained at Lunping by use of 136.1124MHz beacon signal transmitted from the geostationary satellite, ETS-II, have been used to analyze the diurnal, seasonal and solar cycle variations of scintillation activity. The effect of the geomagnetic activity on the scintillation activity has been studied by use of superposed epoch method. The effect is not unique but depends on season and solar activity.View full abstractDownload PDF (822K) -
Po-Fang CHEN1983 Volume 35 Issue 8 Pages 315-319
Published: 1983
Released on J-STAGE: September 14, 2010
JOURNAL FREE ACCESSDownload PDF (427K)
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