巻号一覧
31 巻 (1991 - 1992)
- 4 号 p. 190-
- 3 号 p. 127-
- 2 号 p. 61-
- 1 号 p. 1-
31 巻, 1 号
選択された号の論文の7件中1～7を表示しています
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歌田 実1991 年 31 巻 1 号 p. 1-6
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーDiagenesis includes various phenomena relating to formation and change of minerals, because it has a wide range of physico-chemical conditions in open to closed system. Mineralogical change in diagenesis is mainly diversified by original material, chemistry of interstitial water, sedimentary rate and geothermal gradient. Chemical differentiation and physical change are accompanied during diagenesis, which is closely related to formation of petroleum reservoirs. Usually, diagenesis is well demonstrated by vertical zoning of which the mineralogical zones are defined by assemblage of authigenic minerals.
The outline and the problems in study of diagenesis are briefly described.抄録全体を表示PDF形式でダウンロード (725K) -
海成層中の沸石化作用を例として佐々木 詔雄1991 年 31 巻 1 号 p. 7-13
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーZeolites occur commonly in the Neogene marine sedimentary rocks of Japanese oil fields. The zeolite and albite zones are formed mainly by physical factors during burial diagenesis. At the wells drilled in the oil fields, the zeolite and albite zones are present at the various depth and at the different subsurface temperature, and are oblique to the stratigraphic datums.
Based on consideration of burial and thermal histories in these wells, the transformation temperature of silicic glasses-clinoptilolite-analcime-albite reaction series increases with decrease in the effective heating time of Hood and Castano (1975).
For example, clinoptilolite is transformed into analcime at 62 °C for the effective heating time of 5 Ma, and at 105 °C for 0.5 Ma, approximately. The zeolitization in the marine sediments is affected by the temperature and geological time (e. g. effective heating time).抄録全体を表示PDF形式でダウンロード (766K) -
井上 厚行1991 年 31 巻 1 号 p. 14-22
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーCurrent understanding of factors governing the smectite-to-illite conversion during diagenesis is reviewed in this paper. The factors concerned here are as follows: temperature, pressure, kinetics, Kavailability, inhibitor ions, residence time, origin of starting materials, composition of reaction solution, and porosity and permeability of rocks (and rock/water ratio). Quantitative estimation of the relations between the above factors has not yet been enough. It seems to be necessary to investigate the entire process of smectite-to-illite conversion during diagenesis in close relation to the basis history.抄録全体を表示PDF形式でダウンロード (866K) -
青柳 宏一, 下田 右1991 年 31 巻 1 号 p. 23-31
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーArgillaceous sediment include various minerals such as clays, silicas, silicates, carbonates, etc. Mineral assemblages in argillaceous rocks are a modification of that originally presented in sediments and have been formulated by a combination of various geologic factors such as source materials, depositional environments, diogenesis, metamarphism, and weathering.
Early diagenetic changes of various minerals in sediments have been controlled mainly by chemistry of interstitial or connate water. On the other hand, the most important factor for the late diagenetic transformation of minerals might be the temperature in addition to reaction time and pressure.
Paleotemperature analysis by authigenic minerals can be utilized for the possible prediction of hydrocarbon pools in the exploration area.抄録全体を表示PDF形式でダウンロード (945K) -
佐藤 努, 磯部 博志, 渡辺 隆1991 年 31 巻 1 号 p. 32-37
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーDiagenetic illite/smectite interstrafitied minerals (I/S) from Neogene shales and sandstones in the regions of the Yachi River and Nakanomata River, Niigata Pref.(Japan) are examined by X-ray diffraction (XRD).The decrease of smectite percentage in I/S takes place continuously from 100% to 30%. The I/S from sandstone laminae tend to be of higher expandability than from adjacent shale laminae belonging to the same horizon. Some of XRD patterns indicate that intermediate stage exists at the conversion process from g=0 to g=1. It is due to the mixture or the segregated structure with random and ordered I/S. The properties of expandable layer in I/S are investigated by Greene-Kelly test, and the following points are suggested:
(1) the expandable layer in I/S at early stage of illitization is composed of beidellite-like and montmorillonite-like layers,
(2) the expandable layer in I/S appears to be segregated structure or mixture of the two component layer,
(3) the amount of beidellite-like layer decreases with increasing the amount of illite layer,
(4) the intermediate stage between g=0 and g=1 appears after disappearance of the reflection pattern of beidellite-like layer.
Therefore, the segregation of the mixture in the intermediate stage is due to the properties of precursive smectite before illitization, and the beidellite-like layer in I/S contributes more effectively to formation of ordered I/S than does the montmorillonite-like layer.抄録全体を表示PDF形式でダウンロード (564K) -
堀尾 正和, 渡辺 栄次1991 年 31 巻 1 号 p. 38-43
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーFulvic acid extracted from Motoyama-, Hara-, and Iga-kibushi clays was subjected to elementary and spectroscopic analysis. The functional groups involved in the fulvic acid were also analyzed by the nonaqueous titration method. In comparison with the humic acid, the character of fulvic acid was verified as follows:
1) Fulvic acid was more abundant in oxygen and less in carbon than humic acid.
2) There was not much difference in the functional groups and also in their amount between fulvic acid and humic acid.
3) The amount of functional groups was smaller in humic substances involved in kibushi-clay than in that in soils.
4) Because of the weak intensity for C=C stretching vibration of aromatic ring, the degree of condensation was considered to be low for fulvic acid.抄録全体を表示PDF形式でダウンロード (605K) -
河野 元治, 富田 克利1991 年 31 巻 1 号 p. 44-51
発行日: 1991/05/20
公開日: 2011/09/20
ジャーナル フリーSudoite and tosudite were found in hydrothermal alteration aureole of Nansatsu-type silicified rock deposit in the Makurazaki area, Kagoshima Prefecture, Japan. The d (060) values of the sudoite and tosudite are 1.508 and 1.506 Å, respectively.The structural formula of the sudoite is (Al2.08 Mg2.56 Fe3+0.40Ti0.06 Li0.02 K0.04 Na0.02)(OH) 12 Al4.00 (Si7.08 Al0.92) O20 (OH) 4, and that of the tosudite is (Al1.26 Mg1.60 Fe3+0.11Ti0.01 Li0.01 Mn0.01 K0.17 Na0.03)(OH) 6 Al4.00 (Si6.46 Al.54) O20 (OH) 4.These specimens are characterized by relatively large amounts of Mg and very small amounts of Li. The basal spacing of tosudite is 29.77 Å under 50% relative humidity, and it changed to 31.37 Å after ethylene glycol solvation and to 23.74 Å after heating at 500°C for 1 hr. The basal spacing of Mg-saturated tosudite sample expanded to 31.41 and 32.17Å after ethylene glycol and glycerol solvation, respectively. However, K-saturated sample showed resistivity against the expansion by these treatments. Based on statistic analysis of chemical composition, a positive relationship was recognized between the number of tetrahedral Al and that of octahedral Mg. The result suggests that the small expansion ability of K-saturated present tosudite sample may be attributable to higher negative charge of the tetrahedral sheets.抄録全体を表示PDF形式でダウンロード (2577K)
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