Geology of Byobu Rock and Gobanme Rock, Prince Olav Coast, East Antarctica
スポンサーリンク
概要
- 論文の詳細を見る
We report here the geology of Byobu Rock and Gobanme Rock outcrops hitherto unmapped in the Prince Olav Coast, East Antarctica. Both these outcrops expose high-grade metamorphic and igneous rocks. The metamorphic rock units comprise mainly of gneisses migmatized to variable extent and amphibolites, whereas igneous rocks comprise of granites and pegmatites. Preliminary structural data obtained from the outcrops identified the regional, steep to moderately dipping foliation trend in the WNW-ESE at Byobu Rock, whereas they trend in the NW-SE direction at Gobanme Rock. Two generations of folding were identified, an earlier tight isoclinal intrafolial folds and a late regional open fold. The three deformational events identified are comparable and consistent with those reported in the neighboring outcrops in the Prince Olav Coast. Metamorphic P-T conditions estimated based on various geothermobarometries indicate that the rocks have experienced granulite grade conditions during peak metamorphism (770-880°C and 6-9kbar). The finding of orthopyroxene at Byobu Rock in this study extends the orthopyroxene-in isograd in the progressive metamorphic zone in the Lutzow-Holm Complex further eastward beyond Tenmondai Rock. Inclusions of kyanite within garnet in metapelitic rocks suggest a clockwise P-T path, consistent with the P-T paths suggested for the Lutzow-Holm Complex. Preliminary bulk rock geochemical investigations indicate that granitic rocks and quartzo-feldspathic gneiss mostly belong to volcanic arc granite suite, though their origin remains indistinct. Electron microprobe dating of monazites from representative rocks gave Pan-African ages (557±33Ma), consistent with the regional metamorphic ages reported earlier. Thus, based on the similarities on structural, petrological, geochemical and geochronological data, the Byobu Rock and Gobanme Rock are considered to be integral part of the Pan-African Lutzow-Holm Complex with analogous geological history.
- 国立極地研究所の論文
著者
-
Satish-Kumar M.
静岡大学理学部
-
加々島 慎一
山形大学理学部
-
Satish-Kumar M.
Institute of Geosciences, Shizuoka University
-
Motoyoshi Yoichi
National Institute of Polar Research
-
Kagashima Shin-ichi
Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University
-
Suda Yoshimitsu
National Institute of Polar Research
-
Satish-kumar M.
Institute Of Geoscience Shizuoka University
-
サティッシュ・クマール M.
高知大
-
Satish-kumar M.
静岡大学理学部地球科学教室
-
Satish‐kumar M.
静岡大
関連論文
- A new SF_6 inlet system with a modified Faraday collector alignment of Finnigan MAT-251 mass spectrometer for sulfur isotope measurement
- 南インド、ケララコンダライト帯の泥質ミグマタイト中の紅柱石
- 南極、昭和基地南方地域に産出するMg-Alに富むグラニュライト中の渦巻き成長した石墨
- 第46次南極地域観測隊リュツォ・ホルム湾, プリンスオラフ海岸及び西エンダビーランド地質・古地磁気夏期野外調査報告2004-2005
- P-177 超高温変成岩に含まれるCO_2+炭酸塩包有物の岩石学的意義(20.変成岩とテクトニクス,ポスター発表,一般講演)
- 静岡大学MAT-251質量分析計による炭素・酸素安定同位体比の測定
- Fe-C系の高圧実験による地球内部炭素について
- O-193 東南極、リュツオ・ホルム岩体、ルンドボークスヘッタにおける超高温変成イベントの時期(21.変成岩とテクトニクス,口頭およびポスター発表,一般講演)
- P-3 ロディニアからゴンドワナヘ : 南極基盤地質からの視点((4)ゴンドワナ大陸の誕生と表層環境変化,及びカンブリア紀の生物の爆発的進化,ポスター発表,シンポジウム)
- 南極の顕生代リュツォ・ホルム岩体中の原生代異質岩塊 : プリンス・オラフ海岸、日の出岬地域のグラニュライト相岩類(23.変成岩とテクトニクス)
- 東南極、レイナー岩体内陸部の泥質グラニュライト(予報)(23.変成岩とテクトニクス)
- 東南極、ルンドボークスヘッタの珪灰質グラニュライトにおける変成流体の進化(23.変成岩とテクトニクス)
- Laser Fluorination oxygen extraction system for stable isotope analysis of rock forming minerals
- Origin of graphite in glimmerite and spinellite in Achankovil Shear Zone, southern India
- Granulites from Cape Hinode in the amphibolite-facies eastern part of Prince Olav Coast, East Antarctica: New evidence for allochthonous block in the Lutzow-Holm Complex
- Geochemistry of mafic metamorphic rocks in the Lutzow-Holm Complex, East Antarctica: Implications for tectonic evolution
- Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta
- Geology of Byobu Rock and Gobanme Rock, Prince Olav Coast, East Antarctica
- 赤石山地四万十帯、上部白亜系犬居メランジュ形成時・形成後の温度圧力条件 : 流体包有物による検討
- 東南極プリンスオラフ海岸,びょうぶ岩の泥質変成岩およびミグマタイト(23.変成岩とテクトニクス)
- Cathodoluminescence microscopy of high-temperature skarn minerals from Fuka contact aureole, Okayama, Japan
- Variations in stable isotope compositions (δ^C, δ^O) of calcite within exhumation-related veins from the Sanbagawa metamorphic belt
- Optimum experimental conditions for the conversion of oxygen to carbon dioxide for the precise oxygen isotope analysis of rock forming minerals
- P-232 モザンビーク北部,ルリオ帯前地の先カンブリア紀基盤岩類のSr同位体組成(26. 変成岩とテクトニクス)
- Foreword
- Foreword
- Foreword
- 飯豊山地のざくろ石黒雲母白雲母花崗岩
- O-199 西南日本弧東端における前期白亜紀火成活動 : 朝日山地,西朝日複合塩基性岩体の多様性(24.深成岩及び変成岩,口頭発表,一般講演)
- P-178 東南極リュツォ・ホルム岩体ルンドボークスヘッタ,輝石片麻岩の風化過程における元素の挙動(21.岩石鉱物一般,ポスター発表,一般講演)
- P-152 東南極、日の出岬に産する花崗岩類の火成作用について(19.深成岩・火山岩とマグマプロセス,ポスター発表,一般講演)
- O-248 東南極リュツォ・ホルム岩体に産するメタベイサイトのマグマプロセスと形成場の検討(21.岩石鉱物一般,口頭発表,一般講演)
- P-140 朝日山地東部,古期深成岩類の成因(20.深成岩・火山岩とマグマプロセス,口頭およびポスター発表,一般講演)
- 花崗岩から探る羽越地域の地殻形成
- 東南極リッツォ・ホルム岩体における塩基性変成岩類の産状と岩石化学的特徴(24.岩石鉱物一般)
- 新潟県北部, 岩船花崗岩中の層状構造とそのアイソクロン年代
- 本州弧白亜紀〜第三紀火成活動の時空変遷と下部地殻-Rb-Sr全岩アイソクロン年代とSr, Nd同位体比初生値からの検討-
- O-85 本州弧白亜紀〜第三紀火成岩類のεSr・εNd初生値
- O-84 本州弧白亜紀〜第三紀火成活動の時空変遷
- 254 新潟県北部,蒲萄山塊の花崗岩類の岩石学
- High-grade metamorphic rocks from Skallevikshalsen in the Lutzow-Holm Complex, East Antarctica: metamorphic conditions and possibility of partial melting
- High-grade metamorphic rocks from Christmas Point in the Napier Complex, East Antarctica
- Ultrahigh-temperature metamorphic rocks from Howard Hills in the Napier Complex, East Antarctica
- Mineral ages for multi isotope system in phlogopite-bearing pyroxene granulite and felsic gneiss, the Howard Hills, Enderby Land, East Antarctica: Possible Proterozoic tectonothermal events in the Napier Complex
- Occurrences of metamorphosed ultramafic rock and associating rocks in Howard Hills, Enderby Land, East Antarctica: Evidence of partial melting from geochemical and isotopic characteristics
- Lamproite dykes in the Napier Complex at Tonagh Island, Enderby Land, East Antarctica
- Granulite-facies beryllium pegmatites in the Napier Complex in Khmara and Amundsen Bays, western Enderby Land, East Antarctica
- ARRESTED CHARNOCKITE FORMATION IN SRI LANKA : FIELD AND PETROGRAPHICAL EVIDENCE FOR LOW-PRESSURE CONDITIONS
- Arrested charnockite formation in Sri Lanka: Field and petrographical evidence for low-pressure conditions
- STABILITY OF OSUMILITE IN GRANULITE FACIES METAMORPHISM : KMAS SYSTEM AND NATURAL OCCURRENCES
- Stability of osumilite in granulite facies metamorphism: KMAS system and natural occurrences
- Foreword
- GEOCHRONOLOGICAL CONSTRAINTS ON THE METAMORPHIC EVOLUTION AT RUNDVAGSHETTA, EAST ANTARCTICA
- SAPPHIRINE-BEARING SILICA-UNDERSATURATED GRANULITES FROM FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA : EVIDENCE FOR A CLOCKWISE P-T PATH?
- AN EXPERIMENTAL STUDY OF A CORDIERITE-BEARING GRANULITE FROM RUNDVAGSHETTA, LUTZOW-HOLM BAY, EAST ANTARCTICA
- REACTION TEXTURES IN GRANULITES FROM FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA : AN ALTERNATIVE INTERPRETATION ON THE METAMORPHIC EVOLUTION OF THE RAYNER COMPLEX
- PRELIMINARY REPORT ON STRUCTURES OF FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA
- STRUCTURAL EVOLUTION OF RUNDVAGSHETTA REGION, LUTZOW-HOLM BAY, EAST ANTARCTICA
- A PRELIMINARY REPORT ON CORDIERITE-BEARING ASSEMBLAGES FROM RUNDVAGSHETTA, LUTZOW-HOLM BAY, EAST ANTARCTICA : EVIDENCE FOR A DECOMPRESSIONAL P-T PATH?
- Widmanstatten structure and kamacite-taenite phase distribution in Toluca meteorite
- Granulite Xenoliths from the Sumikawa Granite Body, Niigata Prefecture, Japan : Finding of Spinel+Quartz Assemblage from the Japanese Islands
- Petrography and mineral chemistry of high-grade pelitic gneisses and related rocks from Namaqualand, South Africa
- New evidence for prograde metamorphism and partial melting of Mg-Al-rich granulites from western Namaqualand, South Africa
- THE SIGNIFICANCE OF EUHEDRAL CALCIC PLAGIOCLASE INCLUSIONS IN GARNET FROM THE LUTZOW-HOLM COMPLEX, EAST ANTARCTICA : A TEXTURAL INDICATOR OF PARTIAL MELTING IN PELITIC GNEISSES
- PROVENANCE OF THE LUTZOW-HOLM COMPLEX, EAST ANTARCTICA-ION MICROPROBE U-Pb STUDY OF ZIRCONS (II)
- Electron microprobe technique for U-Th-Pb and REE chemistry of monazite, and its implications for pre-, peak- and post- metamorphic events of the Lutzow-Holm Complex and the Napier Complex, East Antarctica
- Timing of thermal events in eastern Dronning Maud Land, East Antarctica
- 静岡大学MAT-250質量分析計によるドロマイト試料の測定法
- Carbon and oxygen isotope measurement of carbonate molecule in spurrite [Ca_5Si_2O_8(CO_3)]
- LOCAL FORMATION OF HERCYNITE-PLAGIOCLASE SYMPLECTITE AFTER GARNET AND SILLIMANITE IN KHONDALITE FROM HABARANA, SRI LANKA : MINERAL TEXTURES
- Timing of attainment of the spinel + quartz coexistence in garnet-sillimanite leucogneiss from Skallevikshalsen, Lutzow-Holm Complex, East Antarctica
- LOW-PRESSURE GRANULITE-FACIES METAMORPHISM IN THE PRYDZ BAY REGION, EAST ANTARCTICA
- Low-pressure granulite-facies metamorphism in the Prydz Bay region, East Antarctica (abstract)
- Rb-Sr WHOLE-ROCK AGES OF METAMORPHIC ROCKS FROM EASTERN QUEEN MAUD LAND, EAST ANTARCTICA (2) : TENMONDAI ROCK AND RUNDVAGSHETTA
- High-pressure and high-temperature phase relations of an orthopyroxene granulite from McIntyre Island, Enderby Land, East Antarctica
- Geochemistry of adakitic quartz diorite in the Yamizo Mountains, central Japan : Implications for Early Cretaceous adakitic magmatism in the inner zone of southwest Japan
- Foreword
- DEFINITION OF FOLD ELEMENTS IN THE VICINITY OF LUTZOW-HOLM BAY AND PRINCE OLAV COAST, EAST ANTARCTICA
- P-186 八溝山地の花崗岩類のSr同位体組成(27. 深成岩・火山岩(液晶有),ポスター発表,一般講演)
- O-320 八溝山地の白亜紀前期アダカイト質石英閃緑岩(27. 深成岩・火山岩(液晶有),口頭発表,一般講演)
- Metamorphic rocks from the Mongol-Altai ::A first report of Japan-Mongolia Joint Geological Research (2009-2013)