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
JaLCDOI 10.18926/ESR/19848
タイトル(別表記) The first Japanese word "chishitsu-gaku" for the "geology" was proposed by Genpo Mitsukuri (1799-1863)
フルテキストURL 016_001_007.pdf
著者 岡田 博有| 鈴木 茂之|
抄録 The first Japanese word "chishitsu-gaku" for the "geology" was proposed by Genpo Mitsukuri, a scientific contributor in the Tokugawa regime in the 19th century, who was born in 1799 in Tsuyama in Western Honshu, Japan and had worked for scientific activities of the Tokugawa government from 1839 to 1863. His major works for the first making of the "chishitsu-gaku" for the "geology" have been presented in this paper, also showing his contribution to Japanese sciences.
キーワード Genpo Mitsukuri "chishitsu-gaku" 19th century
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 1
終了ページ 7
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 120002309076
JaLCDOI 10.18926/ESR/15024
タイトル(別表記) Microscopic observations of the recent soils: a step for understanding the paleosols
フルテキストURL 015_009_032.pdf
著者 福地 亮| 鈴木 茂之|
抄録 The microscopic observations of the recent soil horizons were conducted in Okayama, Japan (moderate climate). The several soil horizons, including two surface (epipedon) and three subsurface horizons, were recognized in the forest, poorly vegetated hill, and riverside around the Okayama University. The umbric epipedon can be segregated from the organic-rich subsurface horizons by the scattered organic materials in thin sections. The ochrich epipedon shows the sandy matrix without any cements and the illuviation of clay minerals. The subsurface horizons identified in the study area are as follows: albic, argillic, and cambic horizons. Each subsurface horizon shows the specific structures in thin sections. The albic horizon is characterized by the absence of the illuviation. The argillic horizon definitely shows the clayey matrix and the illuviation of clay minerals. The primary structures may be retained in the cambic horizon. The microscopic examination of the Miocene paleosols from the Ukan-cho, Okayama, was attempted. By comparing the recent soils, the cambic horizon and spodic horizon, which is characterized by the concentration of sesquioxides, are identified in the paleosols. This attempt suggests that the microscopic observations of the recent soils is a useful guide to understanding the paleosols
キーワード soil paleosol soil horizon soil structure microscopic observation
出版物タイトル Okayama University Earth Science Report
発行日 2009-03-31
15巻
1号
開始ページ 9
終了ページ 32
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 120002307964
JaLCDOI 10.18926/ESR/15022
タイトル(別表記) Permian and Triassic molluscan fossils from the Maizuru Zone,Okayama City, Southwest Japan
フルテキストURL 015_001_008.pdf
著者 中澤 圭二| Roger Lyman Batten| 鈴木 茂之| 宇和田 英人|
抄録 Permian and Triassic molluscan fossils are found from Mitsu-area, Okayama City, Southwest Japan. Permian bivalve and gastropod fossils are collected from mudstones of the Upper Formation of the Maizuru Group. 4 species of bivalves (Nuculopsis? sp. ind., Leptodesma sp. ind., Streblopteria cf. eichwaldi, Posidonia sp. ind.) and 5 species of gastropods (Worthenia cf. corrugata, Callitomaria n. sp. cf. stanislavi, Apachella n. sp. ind., ??Eunemopsis like trochid, ??Yunnania sp.) are identified. Lower Triassic bivalve fossils are collected from sandstones of the Oono Formation. Neoschizodus cf. laevigatus and Bakevellia (Maizuria) kambei are identified.
キーワード Permian Triassic bivalve and gastropod fossils the Maizuru Zone Mitsu area
出版物タイトル Okayama University Earth Science Report
発行日 2009-03-31
15巻
1号
開始ページ 1
終了ページ 8
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 120002307247
JaLCDOI 10.18926/ESR/13953
フルテキストURL ESR_1_9.pdf
著者 鈴木 茂之|
抄録 The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable. These Groups are tightly folded and metamorphosed un-der low-grade conditions during Hercynian times. The first stage folds of the Volcanic-Siliceous Complex and the Culm Group are associate with slaty cleavages (S1), while the Phyllite-Quartzite Group is asso-ciate with schistosities (S1). Fold analysis using cleavages and minoe folds has been utilized in the analysis of the stratigraphy. This led to systematic horizontal collection of specimens (pelitic rocks). S1 texture is defined by paralled alignment of secondary platy minerals which tend to grow larger and together, forming zonal domains toward the Phyllite-Quartzite Group. The clay matrices change to recrystallized quartz toward the Phyllite Quartzite Group. Textural modifications are evidenced by gradational changes from slaty cleavages to schistosities. This shows that recrystallization is the important deformation mecha-nism responsible for S1 development. It also reflects that the deformation was contemporaneous with metamorphism.
キーワード Slaty cleavage Schistosity Recrystallization
出版物タイトル Okayama University Earth Science Report
発行日 1994-09-20
1巻
1号
開始ページ 9
終了ページ 18
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 120002310428
JaLCDOI 10.18926/ESR/13940
タイトル(別表記) Application of the remotely operated TV vehicle to make geological maps of the Seto Inland Sea
フルテキストURL ESR_2_13.pdf
著者 鈴木 茂之| 稲田 孝司|
抄録 Submarine geological survey using the remotely operated TV vehicle (RV100), was carried out in 4 offshores of the Seto Inland Sea in Kagawa Prefecture. The study areas are west of Kosei Island of Sakaide City, south of Okado-bana of Nankai Town, west of Misaki of Takuma Town and north of Nou-Misaki of Sakaide City. TV vehicle transmite clear pictures of bottom of the sea to the monitor on board. The submarine geology of the study areas are composed of Cretaceous granitic basements and Quaternary sedimentary covers. By using these pictures Recent and Pleistocene deposits could be distinguished and lithology of sediments could also be identified. Lithology of sediments was however difficult to identify using the usual sonic prospecting method. Furthermore, pictures suggesting that ripples are just forming have been obtained. The TV vehicle is convenient in submarine survry, because it can travel much longeer and deeper than human diver. A new method of mapping submarine geology using TV vehicle was developed.
キーワード Submarine geology the Seto Inland Sea remotely operated TV vehicle
出版物タイトル Okayama University Earth Science Report
発行日 1995-09-20
2巻
1号
開始ページ 13
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 120002310382
JaLCDOI 10.18926/ESR/13928
フルテキストURL ESR_3_17.pdf
著者 鈴木 茂之|
抄録 In eastern Chugoku area, Paleogene deposits have not been recognized until fission-track dating of so called "Mountain Gravels" was carried out (Suzuki et al. 1995). Two sedimentation events in Paleogene time (27Ma and 34-35Ma) are inferred by the F-T dating Major lithology of the Paleogene deposits in the study area is graved which is mainly composed of subrounded to rounded cobbles. The "Mountain Gravels" were previously thought to be lower Quaternary deposits. The "Mountain Gravels" is associsted with coal bearing mud, sand, gravel and breccia deposits. The breccia deposits is distributed sporadically between the "Mountain Gravels" and basement rocks. The deposits are mainly composed of poorly sorted breccia and associated granitic sands. It is inferred that the breccia deposits are talus deposits.
キーワード Paleogene breccia talus deposits fission-track dating
出版物タイトル Okayama University Earth Science Report
発行日 1996-09-20
3巻
1号
開始ページ 17
終了ページ 24
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 120002310338
JaLCDOI 10.18926/ESR/13927
フルテキストURL ESR_3_1.pdf
著者 Daniel K. Asiedu| 鈴木 茂之| 柴田 次夫|
抄録 Petrographic and geochemical study of sandstones from the Kenseki Formation have shown that the sandstones are compositionally immature. The immaturity is reflected geochemically by their low SiO2 contents (52-66 wt%) and petrographically by low modal percents of quartz and K-feldspar, and high modal percents of plagioclase and volcanic lithic fragmants. The Kensaki sandstones are, however, poor in Na2O (up to 2.1 wt%). Both petrography and geochemistry suggest a heterogeneous source lithologies of acidic and basic volcanics, sedimentary, and ultramafic rocks. Petrographic evidence is supplied by quartz and plagioclase of volcanic origin, acidic volcanic fragments, basic volcanic fragments, volcanic glass, serpentinite fragments and detrital spinel grains. Geochemical evidence is provided by high FeO* (total iron as FeO), MgO, TiO2, CaO and K2O contents. Petrographic and geochemical study of the Kenseki sandstones indicate calc-alkaline oceanic island are provenance. The sediments were locally derived, with Alpine-type ultramafic rocks exposed in the north and volcanic materials of the Akiyoshi Belt supplying the bulk of the detritus.
キーワード Kenseki Formation modal analyses provenance
出版物タイトル Okayama University Earth Science Report
発行日 1996-09-20
3巻
1号
開始ページ 1
終了ページ 16
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 120002310277
JaLCDOI 10.18926/ESR/13916
タイトル(別表記) Landslide occurrence and geology of the Triassic Nariwa Group, Southwest Japan
フルテキストURL ESR_4_21.pdf
著者 宝谷 周| 鈴木 茂之| 田中 元| 山田 琢哉|
抄録 Geological and topographical study of landslides in the Triassic Nariwa Group has been carried out. Nariwa Group is mostly composed of non-marine deposites and is characterized by cycle of fining upward successions. Landslides abundantly occur in the non-marine successions. Slip surface occure in coaly mudstones that have conspicuously less strength than sandstones. Creeps immediately below slip surfaces contribute to the occurrence of landslides in the Nariwa Group.
キーワード Iandslide Nariwa Group coaly mudstone
出版物タイトル Okayama University Earth Science Report
発行日 1997-09-20
4巻
1号
開始ページ 21
終了ページ 32
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 120002310343
JaLCDOI 10.18926/ESR/13911
タイトル(別表記) (14)C ages of Quaternary deposits in Kojima Lake area, Tamano City, Okayama Prefecture
フルテキストURL ESR_5_13.pdf
著者 佐々木 甫| 鈴木 茂之|
抄録 Two 14C ages are obtained from drilled core samples in Kojima Lake area. One is 7920±250 y.B.P. from peat which is just below silty clay of bay sediments (-14.30-14.61 m) The other is 24900+3450,-2450 y.B.P. from pale milky gray clay of fluvial sediments (-24.15-24.45 m).
キーワード (14)C age Quaternary Kojima Lake area
出版物タイトル Okayama University Earth Science Report
発行日 1998-09-20
5巻
1号
開始ページ 13
終了ページ 16
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 80011114460
JaLCDOI 10.18926/ESR/13909
タイトル(別表記) Topography and deposits of terrace of Yokohama Town, Northeast Japan
フルテキストURL ESR_5_1.pdf
著者 鈴木 茂之| 宮脇 明子|
抄録 Higher, middle and Lower Terraces (Quaternary) have been distinguished in Yokohama Town, Aomori Prefecture. The Higher Terraces are subdivided into three terraces, H1,H2 and H3. They are distributed in hills. H1 and H2 deposites are composed of gravels of fan deposits. H3 deposits are composed of gravels, sands and mud of alluvial plain deposits. The Middle Terraces are subdivided into three terraces, M1, M1' and M2, and occupy almost all terraces in Yokohama Town. These deposits are composed of beach (sand with gravel) and fan (gravel) deposits. The Lower Terraces are subdivided into two terraces, L1 and L2. The L1 Terrace is distributed in limited area along coast and thought to be composed of beach deposits. The L2 Terrace is distributed in limited area along river and composed of braided stream deposits.
キーワード terrace beach deposits fan deposits Quaternary
出版物タイトル Okayama University Earth Science Report
発行日 1998-09-20
5巻
1号
開始ページ 1
終了ページ 12
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 120002310292
JaLCDOI 10.18926/ESR/13906
タイトル(別表記) Peat bed of Jomon age in Desaki Beach, Tamano City, Okayama Prefecture
フルテキストURL ESR_6_23.pdf
著者 鈴木 茂之| 行基 幸一|
抄録 Peat bed remains isolated in the shoreline of western beach of Desaki peninsula. Collected samples gave radiocarbon data of 5790±80 and 5810±60 years BP.
キーワード Peat Holocene Desaki Beach
出版物タイトル Okayama University Earth Science Report
発行日 1999-09-20
6巻
1号
開始ページ 23
終了ページ 28
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 120002310593
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
7巻
1号
開始ページ 47
終了ページ 50
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 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
7巻
1号
開始ページ 41
終了ページ 46
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 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
7巻
1号
開始ページ 35
終了ページ 40
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 120002310497
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
8巻
1号
開始ページ 13
終了ページ 28
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 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
8巻
1号
開始ページ 1
終了ページ 12
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 120002310604
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
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
9巻
1号
開始ページ 19
終了ページ 24
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 120002310485
JaLCDOI 10.18926/ESR/13875
タイトル(別表記) Depositional environments of the Katsuta Group, eastern Tsuyama Basin, Southwest Japan
フルテキストURL earth_science_reports_010_1_23.pdf
著者 山崎 良| 鈴木 茂之|
抄録 The Miocene Katauta Group of the Syohoku-cho area is subdivides into 6 members ; The Uetsuki Conglomerate Member, Nara Sandy Mudstone Member, Tai Gravelly Sandstone Member, Takatori Conglomerate Member, Ayabe Mudstone Member and Maruyama Mutstone Member from bottom to top. The unconformity between Miocene deposits and basement rocks in this area was traced to obtain geometry of the Miocene basin. Contour maps of the bases of the Miocene Yoshino Formation and Takakura Formation indicate paleo-topography. The obtained topography demonstrates a valley, which flowed to north-west, and a few islands and bays. It indicates that these Miocene successuions were deposited in the topography which resemble to the present Seto Inland.
キーワード Katsuta Group Tsuyama Basin Miocene geometry of basin paleoenvironmental chage
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 23
終了ページ 31
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 120002310475