著者

山田 安定

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.14, no.Special2, pp.275-283, 1980-03-10 (Released:2009-08-11)

著者

大森 啓一

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.10, no.3, pp.215-250, 1971-05-25 (Released:2009-08-11)

参考文献数

6

著者

川原 治之助

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.13, no.2, pp.84-90, 1977-01-30 (Released:2009-08-11)

参考文献数

3

著者

今井 琢也

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.3, no.3, pp.187-208_1, 1957-06-30 (Released:2009-08-11)

参考文献数

52

著者

宮本 正道

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.24, no.4, pp.259-263, 1995-10-31 (Released:2009-08-11)

参考文献数

18

---

The method to estimate the cooling rate of meteorites on the basis of atomic diffusion in minerals is summarized. The best-fit cooling rate and burial depth are obtained by fitting a profile calculated by solving the diffusion equation to the observed chemical gradient and the width of lamellae measured by electron microprobe. The thickness of a eucntic crust of the HED parent body was estimated to be about 10 km from augite exsolution in pyroxene. A rapid cooling of a few hundreds °C/yr for pallasite was obtained on the basis of chemical zoning in olivine. Some problems with estimation of the cooling rate are also reviewed.

著者

上原 誠一郎

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.28, no.2, pp.83-86, 1999-05-31 (Released:2009-08-11)

参考文献数

6

著者

森 寛志

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.19, no.3, pp.153-158, 1990-01-31 (Released:2009-08-11)

参考文献数

13

---

Deformation textures (i. e. fracturing, plastic deformation, recrystallization, vitrification, phase transforma-tion, and melting) in naturally and artificially shocked mineral crystals have been reported. The main part of this report is devoted to a description of the shock-induced residual effects in olivine and orthopyroxene crystals recovered from shock experiments by transmission electron microscopic observation. Deformation textures in naturally shocked olivine crystals from some meteorites were also described.

著者

桜井 欽一 加藤 昭

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.7, no.5, pp.348-350, 1965-11-30 (Released:2009-08-11)

被引用文献数

1 1

著者

熊沢 峰夫

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.16, no.1, pp.73-81, 1983-03-30 (Released:2009-08-11)

参考文献数

3

被引用文献数

1

---

A personal view on the current state of mineralogical communities is presented in order to facilitate the expansion of future possibilities.

著者

宇野 泰章 寺西 清 礒村 公郎

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.19, no.Special, pp.63-70, 1990-03-26 (Released:2009-08-11)

参考文献数

10

---

The mode of occurrence of clay minerals and the interaction between hot waters and wall rocks in Arima and Takarazuka have been investigated by X-ray powder diffraction, microscopic observation and chemical analysis. The alteration halo can be divided into three zones, such as, zone I (chlorite-mica zone), zone II (silica zone) and zone III (mica-kaolinite zone). Low, medium and high-temperature waters are mainly located in zone I, II and III respectively. Calcite veinlets are present in drilling cores of zone I and II. The pH values of hot waters in zone II calculated on the basis of the calcite-brine equilibrium equations are higher than those in zone I. Partial CO2 pressure of hot waters are almost constant, indicating a 3.8 atmospheric pressure in zone I, and a 4.9 atmospheric pressure in zone II. The most important factor controlling the chemical composition of hot waters seems to be the calcite-brine equilibrium in wall rocks.

著者

木股 三善 西田 憲正 村上 英樹

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.23, no.2, pp.45-58, 1994-04-30 (Released:2009-08-11)

参考文献数

91

被引用文献数

1 1

---

This paper reviews on crystal chemistry of plagioclases and geochemical roles of their megacrysts including native coppers and hydrocarbons, discussed in two parts.Part I. Structural classification of feldspar compositions can be allocated into four types; feldspar, paracelsian, hexacelsian and hollandite structures. Though the phase relation between the first and the second types has been open to question, recent probing of their isotropic temperature factors and bond-valence theory to the M-sites intensifies that feldspars are in the wide stability field from low to high temperatures under low pressures, and that high pressure and low pressure are the preference field for paracelsians. Though very common in north-east part of Japanese island and Izu-Bonin arcs, anorthite megacrysts have never been found in other districts in Japan and have been rare in world-wide occurrences. Native coppers, verified by chemical shift method of EPMA and X-ray microdiffraction, are found to be included by anorthite megacrysts from Japanese island arc and by labradorite ones from the continental margin of North America. These anorthites in the basaltic lavas are of approximately 1 to 3 cm size and often contain several corroded Mg-olivines scattering as single crytals less than a few mm long. The plagioclase megacrysts show no chemical zoning, but the anorthites with the Al/Si ordered state have partings developed in places whereas the labradorites are of the AUSi disordered structure indicative of high temperature type. Each role in their plagioclase structure establishes Mg, Fe, Al and Si cations as a few minor endmembers of CaFeSi3O8, CaMgSi3O8, AlAl3SiO8 and_??_Si4O8 for the solid solutions. Furthermore micro-inclusions of native zinc, copper and brass scattering in the red-clouded anorthite megacryst frozen by the supercooling environment could have an implication for a precusor to Kuroko deposits. Review (1) discusses both structural tolerance of plagioclases and their megacrysts including native coppers.

著者

笹木 圭子

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.27, no.2, pp.93-103, 1998-05-11 (Released:2009-08-11)

参考文献数

60

被引用文献数

6 6

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Pyrite dissolution at ambient temperatures is one of the important reactions in biogeochemical processes. It is related to the formation of acid mine drainage, where iron- and sulfur- oxidizing bacteria often grow actively and play an important role in pyrite weathering. In this article experimental studies on the oxidation of pyrite are reviewed, including pretreatment method to obtain the well-defined surface of pyrite particles, the mechanisms of pyrite oxidation by both bacteria and oxidizing agents (Fe(III) ions and oxygen), and suppressing factors of the reactions. Microbially mediated dissolution of pyrite in acidic environments proceeds mainly by the indirect contact mechanism of the iron-oxidizing bacteria, Thiobacillus ferrooxidans, that is, the bacteria mainly take part in the oxidation of Fe(II) ions to Fe(III) ions. Therefore, to suppress the weathering the reaction of pyrite with Fe(III) ions must be inhibited. In addition to the reduction and complexation of Fe(III) ions, masking of active sites on the pyrite surface by the preferential adsorption of other species is the most important factor. Based on the experimental studies, utilization of natural organic acids involved in botanical wastes is proposed for remediation and prevention of damage caused by acid mine drainage due to pyrite weathering.

著者

松本 〓生

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.16, no.Special, pp.99-108, 1983-03-30 (Released:2009-08-11)

参考文献数

24

---

Abstract In view of the importance of multiple diffraction effects in X-ray and neutron diffractions, which may cause misunderstanding for the space group determinationss or intensity measurements, the geometry of the phenomena has been reviewed in a summarized form. As examples, the Umweganregung peaks for pyroxene and enargite observed for the φ-azimuth were indexed by operative and cooperative reflections.

著者

針谷 宥

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.2, no.3, pp.204-207, 1955-05-30 (Released:2009-08-11)

参考文献数

4

---

増毛町歩古丹の鏡鉄鉱についてはすでに簡単に記載されている。本地産の鏡鉄鉱は昭和11年頃発見されたものであつたが,当時入手し得た試料が少数であつたため測定が出来なかつた。今回多数の試料を原田教授が入手されたので,それら試料について形態的研究を行つた。形態の完全な結晶は割合に少いので,なるべくよい試料37個を選んだ。測角は複円反射測角器を用い,c(0001)を基準面として行つた。

著者

砂川 一郎

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.3, no.6, pp.543-556_4, 1958-09-30 (Released:2010-02-08)

参考文献数

21

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On the basal plane of one crystal of hematite from an andesitic lava at Ayumikotan, Japan, three types of growth pyramids are described.First type, which is called the “tetrahedral” growth pyramid, consists of many closely spaced, thin, concentric, equi-lateral triangular growth layers. (Photo. 2, 5) On some of these growth pyramids spiral growth and interlacing can be observed. (Photo 5 a, b) On some growth pyramids the layers on one side of the triangular are produced into a peak suggesting the presence of an imperfect screw dislocation. (Photo. 5a) Measurement by multiple beam interferometry (Photo. 4) and fringes of equal chromatic order (Photo.3) show that thinnest growth layrs are 2.3Å thick (I/6 of the unit cell). Further details may be seen in Table 1.Second type is called the “triangular” growth layer. They are equi-lateral triangular growth layers on which no spirals have been observed. (Photo.7) It is suggested that growth took place by two-dimensional neucleation. The origin of the structure within the triangles and the linear arrangement of growth centres is described in the paper. (Photo.8, 9) At some distance from the growth triangles, a serrated structure, like sow-teeth, is developed. (Photo.6) This may also be seen around all growth pyramids of the first type. Measurements of thickness are shown in Table 3.In the third type of growth pyramids (Photo.10, 11) the thickness of the layersin different cases varies from 1 to 4 unit cell including thickness of 2n+1/2 unit cell (see Table4). These growth pyramids seem to be formed by screw dislocation, as there is a pit at the centre of each growth pyramid. The type of interlacing shown by these growth pyramids (Photo.11) suggests that polytypism may be present.From these observations it is deduced that this crystal has grown under the condition of comparatively high supersaturation.

著者

小林 正美 秋山 満知子 木瀬 秀夫 高市 真一 嶋田 敬三 伊藤 繁 平石 明 渡辺 正 若尾 紀夫

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.26, no.2, pp.117-120, 1996-05-31 (Released:2009-08-11)

参考文献数

7

被引用文献数

1 2

---

Except for metal-free chlorophylls (pheophytins) functioning as primary electron acceptors in purple bacteria and in photosystem II of higher plants, all the naturally occurring chlorophylls have been believed to be magnesium complexes. To clarify the reason for the choice of Mg as the central metal of chlorophylls, we have systematically studied the absorption, fluorescence and redox properties of metallo-substituted chlorophylls, and concluded that Zn-substituted chlorophylls may act as both antenna and primary electron donor of photosystems. Quite recently, we discovered novel photosynthesis using Zn-containing bacteriochlorophyll a in an acidophilic bacterium Acidiphilium rubrum. This finding indicates an unexpectedly wide variability of photosynthesis.

著者

櫻井 欽一

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.2, no.1, pp.55-57, 1954-09-30 (Released:2009-08-11)

参考文献数

3

著者

西森 拓

出版者

日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.24, no.2, pp.77-81, 1995-04-30 (Released:2009-08-11)

参考文献数

14

---

With the increasing interest on nonlinear complex phenomena which are lack of explicit symmetry and are not treatable with established methods of physics, new methodology is now required.Here, using a recent computational method with a new point of view, the global pattern dynamics of dunes is discussed. The present procedure of study is expected to give a new prototype for searching complex systems and to give a way to make collaboration between researchers on different fields.

著者

吉木 文平

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.1, no.4, pp.188-200, 1953-10-10 (Released:2010-02-08)

参考文献数

26

著者

真崎 克彦 上原 誠一郎

出版者

一般社団法人 日本鉱物科学会

雑誌

鉱物学雜誌 (ISSN:04541146)

巻号頁・発行日

vol.20, no.1-2, pp.33-42, 1991-05-01 (Released:2009-08-11)

参考文献数

35

被引用文献数

1 1

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Weathering products in a brown soil (sample S3) and in a partially weathered antigorite in yellowish brown color (sample A59b) were collected from the serpentinite zone in Sasaguri area, Fukuoka Prefecture, Japan. The products were studied by X-ray diffraction, transmission electron microscopy, analytical electron microscopy, infrared absorption spectrumand differential thermal analysis. Mineralogical composition of the brown soil are 14Å intergrade, halloysite, goethite and ferrihydrite associated with Si, and hematite. Si-containing goethite, Si-containing ferrihydrite, hematite and hisingerite were found in the weathered antigorite. The results suggest that leaching of Mg and Si from the serpentine minerals occurred at initial weathering stages. Precipitation of hydrous iron oxides and hydrous iron silicates may occur after the leaching of Mg and Si. Poorly crystallized iron minerals showed aggregate of microcrystalline materials (<100Å). The result suggests that the 14Å intergrade and halloysite were produced from weathered chlorite and/or mica minerals in the crystalline schist, or weathered chlorite in the vein at the serpentinite zone, or 2 : 1 layer silicates in eolian dust.