著者 Yamagiwa Nobuo| 鈴木 茂之| Okimura Yuji|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/13844
タイトル(別表記) バングラディシュの更新世台地の地形と地質
フルテキストURL EAR_13_1_1.pdf
著者 Towhida Rashid| Md. hossain Monsur| 鈴木 茂之|
抄録 With regards to the origin and evolution of the Pleistocene tracts (Lalmai, Madhupur and Barind tracts) of Bangladesh, two trends of thoughts are common. Most of the authors believed that the Madhupur, Barind and Lalmai tracts represent tectonically uplifted surface. Some researchers have different opinion and they believed that the Lalmai hills and the Madhupur locality represent tectonically uplifted blocks but the whole Barind tract and the major portion of the Madhuput tracts are not tectonically uplifted, rather these are originated by erossional-depositional processes. In order to solve the problems associated with origin and evolution of Pleistocene tracts of Bangladesh, further study is needed. Borehole data may be collected and fusion images can be prepared from aerial photographs and setellite images to detect netectonic imprins and geomorphological signatures of the areas. Elaborate laboratory analysis of sediment deposits, radiocarbon dating my indicate a new dimension about the origin and evolution of these tracts.
キーワード Bangladesh Lalmai Hill Barind Tract Madhupur Tract Neotectonices Aerial photographs Satellite Image Fusion Image
出版物タイトル Okayama University Earth Science Report
発行日 2006-03-31
13巻
1号
開始ページ 1
終了ページ 13
ISSN 1340-7414
言語 English
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 120002310445
JaLCDOI 10.18926/ESR/56694
フルテキストURL esr_025_031_038.pdf
著者 Amano, Hideki| Suzuki, Shigeyuki| Sato, Masaru| Yanagida, Makoto|
抄録 The study area is situated in Japan Sea side margin of the Shakotan Peninsula, Hokkaido, Japan, where MIS5e Terrace is preserved along the cost. Numbers of tight drilling have done to establish new method for terrace analysis. Buried wave cut terrace and sea cliff (when the MIS5e Terrace was formed) are reconstructed by distribution of the terrace deposits and these bottom of unconformity planes. The precise site and altitude of former shoreline was also obtained. Altitudes of the former shoreline from the 7 sections are almost the same 22 to 27m in height. Previous data of the height of shoreline are obtained from the topographic MIS5e Terrace surface. The altitudes have variation from 30m to 60m. It suggests that the traditional method for the MIS5e terrace analysis had some errors in the study area.
キーワード MIS5e marine terrace terrace deposits tight drilling shoreline
出版物タイトル Okayama University Earth Science Report
発行日 2018-12-27
25巻
1号
開始ページ 31
終了ページ 38
ISSN 1340-7414
言語 English
著作権者 © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
著者 鈴木 茂之|
発行日 1994-09-20
出版物タイトル Okayama University Earth Science Report
1巻
1号
資料タイプ 紀要論文
著者 鈴木 茂之|
発行日 1996-09-20
出版物タイトル Okayama University Earth Science Report
3巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/55322
フルテキストURL esr_023_1_009_015.pdf
著者 Takesue, Norito| Suzuki, Shigeyuki|
抄録 Analyzing of sedimentary facies and structure together with regional field mapping were studied in the mélange unit, upper Cretaceous Shimanto Belt, Wakayama Pref., SW Japan. The field survey was concentrated in the coast of Shiofuki-iwa, Miyama Complex, Hidakagawa Belt where soft deformations penetrate throughout the mélange unit. Brittle to ductile faults associated as later deformations are excluded. The mélange unit is subdivided into the Y-shear zone (YSZ) and P-foliation zone (PFZ). The YSZ is composed of thick lenticular sandstone (trends subparallel to the direction of the mélange), intense shear band (thin layer with concentrated prelithification shear deformation) and mudstone dominant mélange. The PFZ is composed of mudstone dominant mélange (associated with foliations which slightly oblique to the direction of the YSZ) and lenticular sandstone (slightly oblique to the direction of the YSZ). The intense shear band separates the YSZ and PFZ. Preserved radiolarian fossils free from deformation in the intense shear band is the evidence of the prelithification shear deformation in the mélange. A remarkable-fact is that the structures of mélange unit are formed under sinistral sense of shear. The mélange unit in the Shiofuki-iwa is ascribed to be formed by sinistral sense of shear during sediments were prelithified.
キーワード mélange Shimanto Belt Y-shear zone P-foliation zone intense shear band prelithification structures
出版物タイトル Okayama University Earth Science Report
発行日 2016-12-27
23巻
1号
開始ページ 9
終了ページ 15
ISSN 1340-7414
言語 English
著作権者 © 2016 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
JaLCDOI 10.18926/ESR/19850
タイトル(別表記) 岡山県に分布する白亜紀前期羽山層砕屑物質の供給源:砕屑粒の鉱物化学組成とモード組成から導かれる制約
フルテキストURL 016_029_042.pdf
著者 アシード ダニエル| 鈴木 茂之| 柴田 次夫|
抄録 Petrographic and phase chemistry studies of detrital grains were carried out on sandstones from the Lower Cretaceous Hayama Formation, Inner Zone of Southwest Japan, to determine their provenance and the tectonic setting during the early Cretaceous. The results of the modal mineralogy suggest that the Hayama Formation has magmatic arc provenance and that deposition of the sediments took place in the back-arc areas with detritus mostly derived from the magmatic arc and rifted continental margins. The chemical compositions of chromian spinel, chlorite and sphene indicate that significant proportions of the detrital grains were derived from mafic and/or ultramafic sources. The source areas are the mafic and ophiolitic rocks in the Sangun-Renge and Akiyoshi terranes and the felsic volcanic rocks probably from either the Akiyoshi terrane or a source not presently exposed in southwest Japan. However, minor amounts of the detritus were derived from the basement rocks; i.e., carbonates and siliciclastic rocks of the Akiyoshi terrane and the metamorphosed mafic rocks of the Chizu terrane.
キーワード modal analysis sandstone mineral chemistry provenance Hayama Formation
出版物タイトル Okayama University Earth Science Report
発行日 2009-12-25
16巻
1号
開始ページ 29
終了ページ 42
ISSN 1340-7414
言語 English
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 120002309000
著者 Daniel K. Asiedu| 鈴木 茂之| 柴田 次夫|
発行日 1996-09-20
出版物タイトル Okayama University Earth Science Report
3巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/56695
フルテキストURL esr_025_039_048.pdf
著者 Knittel, Ulrich| Walia, Monika| Suzuki, Shigeyuki| Lee, Yuan-Hsi|
抄録 The high-P/low-T Sanbagawa Metamorphic Belt that traverses SW Japan, has been subdivided into two belts thought to have been metamorphosed at ca. 120 Ma and at ca. 65 Ma (‘Sanbagawa Metamorphic Rocks’ and ‘Shimanto Metamorphic Rocks’). The subdivision was based on the assumption that metamorphism occurred at ca. 116 Ma, largely based on an early Rb-Sr isotope study and zircon data obtained for the eclogite unit of the Sanbagawa Belt, whereas in some parts of the belt detrital zircons of late Cretaceous age (90-80 Ma) were discovered. Analysis of detrital zircons sampled from two sites within the area considered to expose the older ‘Sanbagawa Metamorphic Rocks’, including the area investigated by the Rb-Sr study, reveals the presence of zircons younger than 95 Ma in all samples and some grains as young as 80 ± 4 Ma. It is therefore concluded that the Sanbagawa Belt is one single tectonic entity that formed in the Late Cretaceous though it contains older components, including fossiliferous clasts, older basic meta-volcanics and eclogite units that may record earlier metamorphic events.
キーワード U-Pb zircon dating Sanbagawa Metamorphic Belt Late Cretaceous Asemi River
出版物タイトル Okayama University Earth Science Report
発行日 2018-12-27
25巻
1号
開始ページ 39
終了ページ 48
ISSN 1340-7414
言語 English
著作権者 © 2018 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
著者 宝谷 周| 鈴木 茂之| 田中 元| 山田 琢哉|
発行日 1997-09-20
出版物タイトル Okayama University Earth Science Report
4巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/49211
タイトル(別表記) The oldest fossil forest in Japan discovered from the Upper Triassic Nariwa Group, Okayama Prefecture, SW Japan -Implication for reconstruction of depositional environment and paleovegetation-
フルテキストURL esr_019_1_025_037.pdf
著者 湯川 弘一| 寺田 和雄| 孫 革| 鈴木 茂之|
抄録 Erect fossil stumps were found from the outcrop of the Upper Triassic Hinabata Formation, the uppermost part of the Nariwa Group at Hinabata, Nariwa-cho,Takahashi City, Okayama Prefecture, SW Japan. They are evidence of the oldest fossil forest in Japan. The Upper Triassic Nariwa Group is mostly composed of non-marine deposits except the marine Jito Formation and characterized by the abundance in plant fossils. The marine Jito Formation is characterized by occurrence of Norian Monotis ochotica. On the basis of detailed observation of the occurrence of erect fossil stumps, as well as sedimentary facies of fossil-bearing unit, the fossil forest was interpreted to have grown on the top of the natural-levee units. One of the erect fossil stumps was identified as Xenoxylon sp.
キーワード erect fossil stump fossil forest Nariwa Group Upper Triassic Xenoxylon
出版物タイトル Okayama University Earth Science Report
発行日 2012-12-26
19巻
1号
開始ページ 25
終了ページ 37
ISSN 1340-7414
言語 Japanese
著作権者 © 2012 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
NAID 120005232329
著者 三上 禎次| 武蔵 野實| 鈴木 茂之|
発行日 2002-09-20
出版物タイトル Okayama University Earth Science Report
9巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/13847
タイトル(別表記) Geology of Holocene deposits in Mizushima Area, Okayama Prefecture, Japan
フルテキストURL EAR_13_1_15.pdf
著者 鈴木 茂之|
抄録 The study srea, Mizushima is occupied by polder and reclaimed land. The ground of this area is composed of the Holocene deposits below the surface. The deposits are mostly 10 to 20m in thickness and composed of 2 units, the B Unit and C&D Unit. The B Unit is composed of muddy sand with 2 to 3m in thickness. This unit is thought to be deposited in the mouth of paleoriver. The C&D Unit is composed of marine mud and sand with 10 to 15m in thickness. This unit is especially soft and will expand ground oscillations during an earthquake.
キーワード Holocene deposits Mizushima Area Ground oscillation
出版物タイトル Okayama University Earth Science Report
発行日 2006-03-31
13巻
1号
開始ページ 15
終了ページ 18
ISSN 1340-7414
言語 Japanese
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 120002310562
JaLCDOI 10.18926/ESR/54117
タイトル(別表記) Petrography of foundation stones of the Bizen Kokubunji Temple, Okayama Prefecture, Japan ―an attempt to identify their collected site―
フルテキストURL esr_022_1_025_030.pdf
著者 鈴木 茂之| 西村 仁秀| 有賀 祐史|
抄録 The Bizen Kokubunji Temple was constructed in the 8th century, in Maya, Akaiwa City, Okayama. Only foundation stones are preserved. Geological characteristics of the foundation stones suggest that they are collected from mountain area of Maya, about 300 to 800m west from the site. The similarity of the foundation stones and the rocks Maya are identified by the following characteristics. 1) Assemblage of rock types (high grade welded tuff breccia, tuff breccia, tuffaceous sandstone and conglomerate) are the same. 2) Lithology of the 3 rock type of the foundation stones and the rocks from Maya are the same. 3) Rheomorphic flow structures are developed in both high grade welded tuff breccia. 4)Mudstone fragments are contained in both high grade welded tuff breccia tuff breccia.
キーワード Bizen Kokubunji Temple foundation stone collected site Okayama
出版物タイトル Okayama University Earth Science Report
発行日 2015-12-27
22巻
1号
開始ページ 25
終了ページ 30
ISSN 1340-7414
言語 Japanese
著作権者 © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
論文のバージョン publisher
NAID 120005728630
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
9巻
1号
資料タイプ 紀要論文
著者 佐々木 甫| 鈴木 茂之|
発行日 1998-09-20
出版物タイトル Okayama University Earth Science Report
5巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/ESR/13874
タイトル(別表記) Distributions and ages of the Paleogene deposits in the Kibi Plateau Area, and Paleogene paleogeography
フルテキストURL earth_science_reports_010_1_15.pdf
著者 田中 元| 鈴木 茂之| 宝谷 周| 山本 裕雄| 壇原 徹|
抄録 The "Kibi Plateau" forms a unique geomorphic province with the gently-sloping and stable continental feature. Gravel deposites called the "Mountain Gravels", are distributed sporadically in the Kibi Plateau, and have been considered Pliocene deposits. However, recent fission-track ages of the tuff beds intercalated in the deposits have indicated that the ago of deposits are Paleogen in the age. So far, fission-track ages (using zircon) of 61 to 65, 55, 37, 34 to 35 and 27 Ma are obtained. Remaining the belt-like distributions of the Paleogene gravelly valley-full deposits suggest that the Kibe Plateau has been keeping as a stable block, and repeated periods of incision followed by sedimentation of valley-fill deposits are occurred in the area during Paleogene period.
キーワード Kibi Plateau gravelly valley-fill deposites fission-track ages Paleogene palaeogeography
出版物タイトル Okayama University Earth Science Report
発行日 2003-12-20
10巻
1号
開始ページ 15
終了ページ 22
ISSN 1340-7414
言語 Japanese
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 120002310517
著者 水井 良暢| 橘 徹| 鈴木 茂之|
発行日 2001-09-20
出版物タイトル Okayama University Earth Science Report
8巻
1号
資料タイプ 紀要論文
著者 野崎 貴博| 岩崎 志保| 鈴木 茂之| 山本 悦世| 南 健太郎| 田中 克典| 加藤 鎌司|
発行日 2013-12-27
出版物タイトル 岡山大学埋蔵文化財調査研究センター紀要
2012巻
資料タイプ 紀要論文
著者 鈴木 茂之| 中澤 圭二| 田中 元|
発行日 2000-09-20
出版物タイトル Okayama University Earth Science Report
7巻
1号
資料タイプ 紀要論文