巻号一覧
1 巻 (1966 - 1967)
- 4 号 p. 157-
- 3 号 p. 109-
- 2 号 p. 51-
- 1 号 p. 1-
1 巻, 2 号
選択された号の論文の5件中1～5を表示しています
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Noburu Takematsu, Sadao Matsuo, Shinji Sato1967 年 1 巻 2 号 p. 51-54
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーThe isotopic ratios of magnesium in rocks coming from the upper mantle and Bruderheim chondrite were measured by a solid-source mass spectrometer. There is no significant difference in 25Mg/24Mg and 26Mg/24Mg between materials constituting the mantle and Bruderheim chondrite within the limits of 95% confidence. The standard errors of both 25Mg/24Mg and 26Mg/24Mg measurements of a sample were about 0.5%.抄録全体を表示PDF形式でダウンロード (2087K) -
Masaru Suzuki, Sadao Matsuo1967 年 1 巻 2 号 p. 55-60
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーThe isotopic ratios of nickel in a shelf reagent, a dunite and three meteoritic irons were measured. Ni(CO)4 was synthesized from samples and introduced into a mass spectrometer in gaseous form. All the precisions of the isotopic ratio measurements were within one percent which was better than those of previous studies by furnace methods. The relative abundance of 64Ni was lower than that given by WHITE and CAMERON by 20%. There was no significant difference in the isotopic ratios of 60Ni/58Ni, 61Ni/58Ni, 62Ni/58Ni and 64Ni/58Ni between samples analyzed. The present method needs further improvements to remove troubles caused by the decomposition of Ni(CO)4 in the ion source of the mass spectrometer.抄録全体を表示PDF形式でダウンロード (3227K) -
Ryoshi Ishiwatari1967 年 1 巻 2 号 p. 61-70
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーA study was carried out on the assignment of infrared absorption at 1540 cm-1 of humic acid from a recent lake sediment. A relationship between absorbance of the 1540 cm-1 and nitrogen content, and chemical form of nitrogen in humic acid were examined. It was concluded that this band corresponds to the amide II of protein-like substances. Moreover, an example was given, showing a possibility of estimating proteinous nitrogen content of humic acid from lake sediments by the use of this band. It was suggested that, in the surface layer of lake bottom mud, all nitrogen in humic acid is present in proteinous form, on the other hand, in the deeper layer, proteinous nitrogen constitutes about 70% of the total nitrogen present in the humic acid.抄録全体を表示PDF形式でダウンロード (4747K) -
Yasuo Shimazu, Tatsuo Urabe1967 年 1 巻 2 号 p. 71-94
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーA mathematical formulation of the mantle-crust development is carried out from the view point of material transfer. The enrichment of elements into melts during the process of magma generation and the transport rate within the earth are the essential factors. Based upon the approximation of dilute ideal solution, the enrichment factors for minor elements during partial melting, equilibrium freezing, fractionation freezing and zone melting are calculated. It is shown that the log-linear pattern of lanthanide concentration is realized not only by the melting process of the whole mantle but also by a repetition of local melting. Numerical integration of the equation of development is carried out and it is compared with the observed data by PATTERSON and TATSUMOTO for U-Pb system. A model with the following characteristics is proposed: (1) Repetition of local melting of the mantle materials. (2) Upward transfer into the crust and mixing. (3) Continuous material exchange between the upper and the lower mantle. It is concluded that the mantle differentiation and the mantle convection hypotheses do not contradict with each other under reasonable physical and chemical conditions.抄録全体を表示PDF形式でダウンロード (10077K) -
Kokichi Ishioka1967 年 1 巻 2 号 p. 95-108
発行日: 1967年
公開日: 2008/04/08
ジャーナル フリーA granitic rock with an aegirine-bearing ferrosalite is found to occur as a small dyke at Myogase, Japan. In parts of the dyke the clinopyroxene granite grades into a biotite-bearing leucogranite with granophyric texture and feldspars of high temperature optics. The pyroxene granite encloses xenoliths of marbles and gneisses. Five analyses are given of rocks, together with an analysis of the clinopyroxene. No removal of aluminium from the magma is suggested and epidote, grossular andradite and the clinopyroxene itself are indicated to have locked aluminium in themselves. The very seldom occurrence of alkali pyroxene granite due to carbonate rock contamination is concluded to come from a limited availability of high temperature, dry magmas.抄録全体を表示PDF形式でダウンロード (6831K)
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