巻号一覧
40 巻, 6 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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島津 光夫1956 年 40 巻 6 号 p. 207-216
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリーThe Sanbagawa, Mikabu metamorphics and the Chichibu Paleozoics are diatributed in this district.
Green rocks occuring in the crystalline schist, are composed of massive green rock and the green intrusive rock (the Mikabu intrusive), which include meta-diabase, meta-gabbro and amphibolite.
Most of the ultramafic rocks concordantly intrude along the boundary between the massive green rock and the schist. They are mainly composed of dunite, banded diallage peridotite, diallage peridotite, fine-grained and coarse-grained gabbro, and are companied by gabbro pegmatite and albitite. Most of the ultramafic rocks are affected more or less by serpentinization and other metasomatic actions. Although these alterations are varied in different rocks, they are always characterized by the transformation of olivine to antigorite and of plagioclase to grossularite. Some gabbroic rocks are also altered into rodingite. Compared with the ordinary grossularite, the grossularite in these rocks has lower refraction indices (1.720-1.733) and smaller density (3.50) and lattice constant (11.88 A).
From the properties, it is considered that the grossularite probably inculdes the hydrogrossular molecules.抄録全体を表示PDF形式でダウンロード (1307K) -
早瀬 一一, 堤 得道1956 年 40 巻 6 号 p. 216-223
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリー1. 行者山花崗岩中の放射能鉱物はモナズ石及びジルゴンが主なものである。
2. 放射能鉱物は花崗岩塊の周縁に多く,且強いものがある。
3. ホルンフエルス中にも弱いものがある。
4. 大谷鉱山附近のものは鉱化作用と関係があるらしい。
5. 微粒鉱物では鉱物の小さいものが放射能が強いことが多い。
6. ジルコンに於て箸しい放射能の不均一が認められる場含がある。抄録全体を表示PDF形式でダウンロード (485K) -
苣木 浅彦, 田代 忠一1956 年 40 巻 6 号 p. 223-230
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリーUnder the microscope, some unmixing intergrowths are found in chalcopyrite and sphalerite from the Daira mine, Akita Prefecture, which is working on the zinc and lead veins filling up the fissures in the Tertiary tuff and mudstone. They show the textures as follows;
1) Lamellar and drop-like crystals of pyrrhotite in chalcopyrite.
2) Skeletal crystals of sphalerite in chalcopyrite.
3) Emulsoidal crystals of chalcopyrite in sphalerite.
4) Lamellar and fine drop-like cubanite in emulsoidal chalcopyrite in sphalerite.
5) Emulsoidal chalcopyrite in skeletal crystals of sphalerite in chalco-pyrite.
From the assemblages of minerals and the results of the thermal experiments, these intergrowths are belived to have been formed by unmixing of solid solutions produced at high temperatures. Therefore, a part of the ore veins of the Daira mine may be said to have been formed at high temperatures.抄録全体を表示PDF形式でダウンロード (1761K) -
倉持 文雄1956 年 40 巻 6 号 p. 230-238
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリー東京都西多摩郡奥多摩町三頭山(5万分の1地形図,五日市図幅)に露出する,第三紀の石英閃緑岩1)2)の乾燥状態における耐圧強度,ヤング率,ポアッソン比の測定を試みた。さらに前記の弾性係数から剛性率,体積弾性率を算出した。また前記の測定にあたつて,あらかじめ見掛け比重3),吸水率4),有孔率5)等も測定した。
その結果二岩塊の弾性係数は次の通りである。即ちNo.1岩塊においてはヤング率6.5～7.3×10” dyne/cm2,ボアッソン比0.17～0.25, 剛性率2.6～3.0×10” dyne/cm2,体積弾性率3.6～4.7×10”dyne/cm2,No.2岩塊においてはヤング率59～6.8×10” dyne/cm2,ポアッソン比0.23～0.33,剛性率2.4～2.7×10”dyne/cm2,体積弾性率3.7～6.4×10”dyne/cm2である。抄録全体を表示PDF形式でダウンロード (2149K) -
兼松 四郎1956 年 40 巻 6 号 p. 238-244
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリーAs the results of the Kobiwako bed observation in the western part of the Lake Biwa, the writer recognized the following formation and clay minerals.
1. The weathering products of the biotite granite are widely distributed and in some places these beds are alternated with the soilificated products of clayslate, sandstone and quartzite.
2. By means of chemical analysis and X-ray studies on the colloidal fraction clay minerals are classified in two groups:
a) Werthering products of biotite granite contain dominantly kaolinite with lesser amounts of montmorillonite.
b) Clayslate and sandstone soils are dominant ?? y hydrated halloysite with minor amount or none of the other clay minerals.
From the results of the clay mineral studies in the Kobiwako bed in Shiga Prefecture, conc ?? uded as follows:
a) Hydrated halloysite and illite are contained in soils of all rocks.
b) The weathering products of rocks included a kaolinite.
c) The more weathering products are converted into s ?? il the more hydrated halloysite increased.抄録全体を表示PDF形式でダウンロード (367K) -
浅井 宏1956 年 40 巻 6 号 p. 245-249
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリーThe writer describes the petrographical characters of the ultrabasic rock founed as a block on the River Panke, Hidaka province and gives some considerations on its genesis.抄録全体を表示PDF形式でダウンロード (329K) -
本邦産パーライトの研究その2桑原 寛1956 年 40 巻 6 号 p. 249-250
発行日: 1956/12/01
公開日: 2008/03/18
ジャーナル フリーPDF形式でダウンロード (163K)
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