検索結果 305 件
| JaLCDOI | 10.18926/ESR/13904 |
|---|---|
| フルテキストURL | ESR_6_1.pdf |
| 著者 | 井上 佳紀| 加瀬 克雄| |
| 抄録 | Phlogopite and hornblende were found in amall amounts in the contact-metamorphosed dunite-harzburgite complex at Yanomine. Phlogopite occurs in interstices of silicate minerals in dunite and harzburgite located near the contact with granite. Some phlogopite grains also occur as inclusions in chromian spinel of chromitite bands. Hornblende is present associated with such metamorphic minerals as talc, olivine and orthopyroxene. Interstitial phlogopite is characterized by lower TiO2 and higher K/(K+Na) atomic ratio compared to that included in chromian spined. Hornblende in dunite chages its composition from edenite associated with olivine-talc through edenitic hornblende to Si-poorer magnesio-hastingsitic hornblende and magnesio-hastingsite with olivine or olivine-orhtopyroxene. The interstitial phlogopite is suggested to have been formed intimately connected with fluids generated in ralation to the intrusion of granite. On the other hand, included phlogopite is considered to have crystallized from the incompatible elements-enriched hydrous melt resulted from mantle-melt interaction. Hornblende should be a metamorphic mineral formed under high temperature conditions. |
| キーワード | Phlogopite Hornblende Ultramafic complex Dunite Harzburgite Chromitite Contact metamor-phism Yanomine |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 1999-09-20 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 12 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310269 |
| JaLCDOI | 10.18926/ESR/13902 |
|---|---|
| フルテキストURL | ESR_7_47.pdf |
| 著者 | Yamagiwa Nobuo| 鈴木 茂之| Okimura Yuji| |
| 抄録 | A new rugose coral species, Lithostrotion (Siphonodendron) hinensis is described in this paper. It was collected from the Carboniferous Hina limestone in Okayama Prefecture, Southwest Japan. Judging from the paleontological data, the age indicates probably Late Viaean, Early Carboniferous. |
| キーワード | Early Carboniferous rugosa Lithostrotion (Siphonodendron) Hina Limestone Okayama |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 47 |
| 終了ページ | 50 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310319 |
| JaLCDOI | 10.18926/ESR/13901 |
|---|---|
| タイトル（別表記） | Tidal notch cut into the Namigata Limestone, 240m above sea level, Ibara City, Okayama Prefecture |
| フルテキストURL | ESR_7_41.pdf |
| 著者 | 藤原 貴生| 鈴木 茂之| 前田 保夫| |
| 抄録 | The tidal notch and the sea caves which cut into the Namigata Limestone is stiuated in 240m above sea level, Ibara City. The notch assocciates the Namigata Terrace 200m to 240m high. These geomorphological features indicate an event of high sea level. However the age of the event has not been known. |
| キーワード | notch sea cave Namigata Okayama Prefecture |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 41 |
| 終了ページ | 46 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310395 |
| JaLCDOI | 10.18926/ESR/13900 |
|---|---|
| タイトル（別表記） | Relashonships between "Mountation Gravels" and the Bizen and Tomihara Coal Measures, northern Okayama City, Southwest Japan |
| フルテキストURL | ESR_7_35.pdf |
| 著者 | 鈴木 茂之| 中澤 圭二| 田中 元| |
| 抄録 | The Bizen and Tomihara Coalfields which were situated in northern Okayama City, had produced lignite during 1940s. Distribution of coal measures indicates that the coal measures are intercalated in the middle of the so-called "Mountain Gravels". The "Mountain Gravels" is subdivided into two formations ; the older, about 34～35Ma, and the younger, about 27Ma, of fission track ages. The older formation inculudes the Bizen Coal Measures. On the other hand, the Tomihara Coal Measures are intercalated in the younger formation. |
| キーワード | Bizen Coal Measures Tomihara Coal Measures Okayama City Paleogene |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 35 |
| 終了ページ | 40 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310497 |
| JaLCDOI | 10.18926/ESR/13899 |
|---|---|
| フルテキストURL | ESR_7_27.pdf |
| 著者 | 逸見 千代子| 草地 功| Kagetama Tatsuya| |
| 抄録 | The clinopyroxenes of the hybrid rocks from the Hirata outcrop, Kushiro, Hiroshima Prefecture, Japan are grouped into(1)diopside, (2)aegirine, and (3)zoned pyroxene. The diopside occurs as isolated crystals enclosed in feldspars. The aegirine occurs along with late hydrous minerals in pore spaces. The zoned pyroxenes occur as discrete cryatals with wide rims growing interstitially between feldspar laths and show a continuous composition-al trend from diopside through hedenbergite and aegirine-augite to aegirine or titanian aegirine. The pyroxenes enclosed in feldspars and the cores of the zoned crystals have nearly same chemical composition. The late stage pyroxenes are characterized by extreme enrichment of sodium and sometimes titanium. The titanian aegirines studied hera are characterized by the predominance of the Na(Fe2+, Mg)0.5Ti0.5Si2O6 component over other Ti-bearing pyroxene components. The compositional trend of clinopyroxenes from the Hirata hybrid rocks follows a typical trend of peralkalne rocks. The peralkaline neture of the Hirata samples is a result of compositional change of magma accompanied by the metasomatic skarn formation. |
| キーワード | aegirine aegirine-augite diopside pyroxene hybrid rock skarn |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 27 |
| 終了ページ | 34 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310313 |
| JaLCDOI | 10.18926/ESR/13897 |
|---|---|
| タイトル（別表記） | Water-soluble materials formed by the reaction between a volcanic rock and HCI and/or SO2 gases |
| フルテキストURL | ESR_7_21.pdf |
| 著者 | 赤木 誠司| 山本 雅弘| |
| 抄録 | Experiments on the reaction of a volcanic rock, dacite with HCI and /or SO2 gases have been carried out at room temperature to 800℃ for understanding of the condition of the formation of water-soluble materials on volcanic ash. HCI reacted with the dacite mainly at low temperatures (≤200℃), whereas SO2 did at high temperatures (≥400℃). It was also found that CI/SO4 ratios of water-soluble materials were very high at low temperatures, but decreased rapidly with increasing temperature. In the experiments using a mixture of HCI and SO2, the cation composition at 600℃ and 800℃ was revealed to be significantly different from that at lower temperatures, suggesting the change in the reaction process with temperature. |
| キーワード | Volcanic gas Volcanic ash Water-soluble material CI/SO4 ratio |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 21 |
| 終了ページ | 26 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310554 |
| 著者 | 城市 康隆| Narong, Lenghor| 高柳 俊夫| 大島 光子| 本水 昌二| 浦 信夫| |
|---|---|
| 発行日 | 2006-11-17 |
| 出版物タイトル | 分析化学 |
| 巻 | 55巻 |
| 号 | 9号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/ESR/13894 |
|---|---|
| タイトル（別表記） | Native gold from Mikawa mine, Niigata Prefecture, Japan |
| フルテキストURL | ESR_7_19.pdf |
| 著者 | 山川 純次| 田邊 満雄| 島田 和昌| 逸見 千代子| |
| 抄録 | Native gold was found at Mikawa mine, Niigata Prefecture, Japan. The mineral was associated with quartz in a druse within quartz-vein in propyrite. The crystals were formed in filiform, reticulated and dendritic shapes with about 1 mm length with 0.1 mm width and 0.05 mm thickness. Very malleable and ductile, opaque and yellow with metallic luster. Qualitative and semi-quantiative analyses were performed by the wavelength dispersive EPMA. Quantitatively, the crystals contained Au, Ag and Hg. Semi-quantitative analyses were executed with ZAF correction algorithm. The results showed that these specimens had a average chemical composition Au0.77 Ag0.11Hg0.12. This specimen was archived at our site with a collection number ESO-M01001. |
| キーワード | Native Gold Mikawa Mine electrum ESO-M01001 |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 19 |
| 終了ページ | 20 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310280 |
| JaLCDOI | 10.18926/ESR/13893 |
|---|---|
| フルテキストURL | ESR_7_15.pdf |
| 著者 | 小田 仁| Ito Aki| |
| 抄録 | Long-period coda waves were recorded on the vertical-component seismograms of aftershocks of the Hyogo-ken Nanbu earthquake, 1995. We identify the long-period coda waves as Rayleigh wave, because they appear after the S-arrival times and exhibit the normal dispersion that propagation velocity of the coda waves increases with an increase in period. By applying the moving window analysis to the coda waves from nine aftershocks, the group velocities are determined as a function of period within the range of 2 to 8 s. The group velocity dispersion data are inverted to investigate the S-wave velocity structure of the upper crust. The S-wave velocity structure is consistent with those obtained in previous studies using traval time analysis of bood waves. |
| キーワード | surface wave dispersion coda wave S-wave velocity structure upper crust Hyogo-ken |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 15 |
| 終了ページ | 18 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310493 |
| JaLCDOI | 10.18926/ESR/13891 |
|---|---|
| タイトル（別表記） | Automated observation of sea surface eddy flux on a cruising ship |
| フルテキストURL | ESR_7_1.pdf |
| 著者 | 高橋 聡司| 塚本 修| 石田 廣史| 米山 邦夫| |
| 抄録 | Sea surface eddy fluxes were evaluated with the eddy correlation method including ship motion correction for the wind vector components. Previous ship motion correction algorithm was revised as a simple scheme setting a motion sensor at the same place with the sonic anemometer. This revised eddy flux system was mounted as a routine continuous measurement system on the R/V 'Mirai' of Japan Marine Science and Technology Center. The first cruise was conducted at the tropical weatern Pacific in June 2000. Continuous sea surface fluxes were obtained and the data quality was checked with some parameters. This system is planned to be developed as a automated data processing system including ship motion correction and real-time flux evaluation system. These eddy fluxes can be integrated with the bulk fluxes and radiation fluxes to understand sea surface heat balance over the global ocean. |
| キーワード | Sea surface fliux Automated observation Eddy correlation method |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2000-09-20 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 14 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310644 |
| 著者 | 山本 貴子| Akhmad, Sabarudin| 野口 修| 高柳 俊夫| 大島 光子| 本水 昌二| |
|---|---|
| 発行日 | 2006-11-17 |
| 出版物タイトル | 分析化学 |
| 巻 | 55巻 |
| 号 | 9号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/ESR/13889 |
|---|---|
| フルテキストURL | ESR_8_1_39.pdf |
| 著者 | 小林 大樹| Yamamoto Masahiro| |
| 抄録 | Hydrogen and oxygen isotope ratios of thermal waters from 42 hot springs in Izu Peninsula, Shizuoka Prefecture, range from -51.7 to -24.7% in δD and from -7.9 to -4.1% in δ18O, respectively. The isotope ratios suggest that most of the thermal waters in Izu Peninsula are essentially meteoric in origin. Significantly deviated from the normal meteoric waters are thermal waters from Yumigahama, Kumomi, and Shimogamo hot springs which may be mixtures of seawater and local meteoric waters, and thermal waters from Izusan and Imaihama whose oxygen isotope ratios may have become heavier by water-rock interaction. |
| キーワード | Hydrogen isotope ratio Oxygen isotope ratio Thermal water Hot spring Izu Peninsula Shizuoka Prefecture |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2001-09-20 |
| 巻 | 8巻 |
| 号 | 1号 |
| 開始ページ | 39 |
| 終了ページ | 44 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310513 |
| JaLCDOI | 10.18926/ESR/13888 |
|---|---|
| タイトル（別表記） | Relationship between the water quality of three main rivers and geology of Okayama Prafecture |
| フルテキストURL | ESR_8_1_29.pdf |
| 著者 | 木下 卓也| 松田 敏彦| |
| 抄録 | Concentrations of inorganic major components (Ca2+, Mg2+, Na+, K+, ΣFe, AI3+, HCO3, SO4, CI-, NO3, F- and SiO2) were measured in 57 water samples from three main rivers, the Yoshii, Asahi and Takahashi Rivers and their tributaries. The water quality is discussed in relation to the geological environment in the drainage basin of three rivers. The following results were obtained from the investigation. The degree of influence of rocks on the water quality was limestone≫basic rocks>clastic rocks>andesite>rhyolite>gramite. The influence of geology is clear in the riverhead but it is obscure in the downstream. The concentration of each component increases generally from the upper stream to the lower stream but that of SiO2 only decreases in the lower stream. Kaolinite is a stable mineral as a weathering prodouct from the ion compositions of three rivers. In a rough estimation, Yoshii, Asahi and Takahashi Rivers weather 303,000t, 433,000t and 1,033,000t of the rocks respectively from their basins in a year. The syrface of their basins are scraoed off 0.06mm, 0.11mm and 0.15mm respectively in a year. |
| キーワード | Water quality River water Geology of basin Yoshii River Asahi River Takahashi River Okayama Prefecture |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2001-09-20 |
| 巻 | 8巻 |
| 号 | 1号 |
| 開始ページ | 29 |
| 終了ページ | 38 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310339 |
| JaLCDOI | 10.18926/ESR/13887 |
|---|---|
| タイトル（別表記） | Trace of the Median Tectonic Line in Mima area, eastern Shikoku |
| フルテキストURL | ESR_8_1_13.pdf |
| 著者 | 水井 良暢| 橘 徹| 鈴木 茂之| |
| 抄録 | Tracing outcrops of shear zone were used to describe the geometry and structure of the Median Tectonic Line in Mima area, eastrn Shikoku. A distinct new fault outcrop was discovered between the Mino and Ikuchi Faults at the northern slope of the Mt. Boso. These two faults are regarded as a single continuous fault. The analysis of surface fabrics of quartz in fault in fault gauge has been carried out to determine relative fault activity events. |
| キーワード | surface fabrics fault gauge Mino-Ikuchi Fault Median Tectonic Line |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2001-09-20 |
| 巻 | 8巻 |
| 号 | 1号 |
| 開始ページ | 13 |
| 終了ページ | 28 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310656 |
| JaLCDOI | 10.18926/ESR/13885 |
|---|---|
| タイトル（別表記） | Miocene Ukan Formation, Ukan Area, Okayama Prefecture, Southwest Japan |
| フルテキストURL | ESR_8_1_1.pdf |
| 著者 | 藤原 貴生| 田口 栄次| 鈴木 茂之| |
| 抄録 | In this paper, we deal with the Miocene Ukan Formation, sporadically distributed in Ukan-cho, Okayama prefecture, from a viewpoint of analysis of lithology and molluscan assemblages. The Ukan Formation is lithostratigraphically divided into the Suzuoka Conglomerate, Yamagata Muddy Sandstone, Shimoyokomi Sandstone and Conglomerate, Azechi Sandstone and Conglomerate, Tsuneyama Siltstone Members in ascending order. The following 6 molluscan assemblages are recognized. The lower four members and the last member is correlative to the Lower Sandstone and Upper Shale Formation of the Bihoku Group, respectively judging from lithology and fauna. The temporal chages of the above mentioned molluscan assemblages represents that gradual deeping of sea during the depositional period from the Suzuoka Conglomerate and Yamagata Muddy Sandstone Members to the Azechi Sandstone and Conglomerate Member via the Shimoyokomi Sandstone and Conglomerate Member, and abrupt deeping of sea seems to have happened between the Azechi Sandstone and Conglomerate Member and the Tsuneyame Siltstone Member. |
| キーワード | Lithology Molluscan assemblage Paleoenvironmental change Ukan Miocene |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2001-09-20 |
| 巻 | 8巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 12 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310604 |
| 著者 | 上甲 実| 清原 康友| 塚本 修| |
|---|---|
| 発行日 | 2002-09-20 |
| 出版物タイトル | Okayama University Earth Science Report |
| 巻 | 9巻 |
| 号 | 1号 |
| 資料タイプ | 紀要論文 |
| 著者 | 楊 勤| 塚本 修| |
|---|---|
| 発行日 | 2002-09-20 |
| 出版物タイトル | Okayama University Earth Science Report |
| 巻 | 9巻 |
| 号 | 1号 |
| 資料タイプ | 紀要論文 |
| 著者 | 藤原 貴生| 鈴木 茂之| |
|---|---|
| 発行日 | 2002-09-20 |
| 出版物タイトル | Okayama University Earth Science Report |
| 巻 | 9巻 |
| 号 | 1号 |
| 資料タイプ | 紀要論文 |
| JaLCDOI | 10.18926/ESR/13880 |
|---|---|
| タイトル（別表記） | Pyrite spots formed along slaty cleavage texture of pelitic rocks of the Tamba Belt, Ujitawara Town, Kyoto Prefecture, Southwest Japan. |
| フルテキストURL | ESR_9_19.pdf |
| 著者 | 三上 禎次| 武蔵 野實| 鈴木 茂之| |
| 抄録 | Pyrite spots were identified in pelitic rocks from the Ujitawara area, southernmost part of Tamba belt. XMA analysis shows that the spots are composed of pyrite. The spots occur along slaty cleavage plane and form spotted shape of diameter of about 5mm. |
| キーワード | The Tamba Group Ujitawata pelitic rocks pyrite spots slaty cleavage |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2002-09-20 |
| 巻 | 9巻 |
| 号 | 1号 |
| 開始ページ | 19 |
| 終了ページ | 24 |
| ISSN | 1340-7414 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310485 |
| 著者 | 東 裕行| 三枝 誠行| 福田 宏| |
|---|---|
| 発行日 | 2002-09-20 |
| 出版物タイトル | Okayama University Earth Science Report |
| 巻 | 9巻 |
| 号 | 1号 |
| 資料タイプ | 紀要論文 |