インド東ガ-ト帯のテクトニクス-東ゴンドワナの原生代事件の研究-

1996 Fiscal Year Annual Research Report

• Project/Area Number: 08041109
• Research Institution: Osaka City University
• Principal Investigator: 吉田 勝 大阪市立大学, 理学部, 教授 (30047112)
• Co-Investigator(Kenkyū-buntansha): SANTOSH M. ケララ州立地地球科学研究所, Scientist ; RAJESHAM T. インド地質調査所南部地域局, 地質調査官 ; RAO A. T. アンドラ大学, 教授 ; RAO S. Divi CNSジオマティックス社, 主任研究者 ; 白幡 浩志 室蘭工業大学, 教授 (00002882) ; 田納庄 良昭 神戸大学, 発達科学部, 教授 (90030585) ; 諏訪 兼位 日本福祉大学, 教授 (70022564) ; 和田 秀樹 静岡大学, 理学部, 助教授 (20126791) ; 吉倉 紳一 高知大学, 理学部, 教授 (10093957) ; 小山内 康人 福岡教育大学, 教育学部, 助教授 (80183771) ; 有馬 真 横浜国立大学, 教育学部, 教授 (10184293)
• Keywords: インド楯状地 / 東ガ-ト帯 / グラニュライト / カルクシリケート / グラファイト

Research Abstract

東ガ-ト帯の地質情況の解明
(1)東ガ-ト帯中央部のヴィサカパトナム周辺地域で、研究代表者ら7人と研究協力者8人で地質野外調査を実施した。同地域にはグラニュライト相の各種岩類が分布し、一般構造は東-西で、中〜低角度の傾斜を持つ。後期の北北東-南南西及び北西-南東方向の軸面片理を持つ〓曲構造が部分的に発達する。
(2)ヴィサカパトナムの約200km北方のテッカリ周辺地域には特徴的なガ-ネットミグマタイトがまとまって分布する。ミグマタイトは変表成岩類起源で、約800°C10kbの温度圧力条件下で形成した後,等圧降温を被った。
(3)東ガ-ト帯中央南部のネロール片岩帯を予備的に調査して地質特徴を観察し、岩石資料を採集した。
2.インド南部及び周辺地域のグラニュライト帯の地質特徴の徴明
(1)インド南部グラニュライト帯で、カルクシリケート岩中の降温経路を示す変成反応が示された。流体包有物の特徴から、この地域におけるグラニュライトの形成は、系外からの二酸化炭素流体の流入が基本的な役割を果たしたことが示された。
(2)インド南部グラニュライト帯で、脈状、ペグマタイト中、及び基質のグラファイトの産状と炭素同位体の特徴から、前二者の炭素は変表成岩類起源のものではなく、系外起源であることが分かった。
(3)スリランカの先カンブリア界は約5億年前前から5.8億年前に全体としてのパイルナップ構造を形成した。この構造事件は、東ゴンドワにおけるパンアフリカ変動の構造特徴を具体的に示すものと注目される。

Research Products

• [Publications] 吉田勝: "先カンブリア代-初期古生代の東ゴンドワナ-周東南極変動とパンアメリカ変動-" 月刊地球. 18・6. 398-403 (1996)
• [Publications] Yoshida, Masaru: "Recent progress in the study of Precambrian te ctonics of the India-Antractic sector of East Gondwana (IGCP-288)." Japan Contribution ot IGCP, 1996. Japan Committee of IGCP, Tokyo. 5-18 (1996)
• [Publications] Yoshida, Masaru and Arima, M.: "Proterozoic events in East Gondwana : Japanese contribution to IGCP-368." Japan Contribution ot IGCP, 1996. Japan Committee of IGCP, Tokyo. 73-83 (1996)
• [Publications] Yoshida, Masaru & Santosh, M.: "Southernmost Indian Peninsular and the Gond-wanaland." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 15-24 (1996)
• [Publications] Rajesh, H. M. and Santosh, M.: "Alkaline magmatism in Peninslar India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 91-115 (1996)
• [Publications] Chandran, R. R. et al.: "Proterozoic mineralization in southern Kerala : summary characteristics and genesis." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 117-144 (1996)
• [Publications] Santoshi, M.: "The Trivandrum and Nagercoil granlite bolcks." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 243-277 (1996)
• [Publications] Satish-Kumar, M. & Santosh, M.: "Calc-silicate rocks and marbles from the Kerala Khodaliet Belt : An appraisal." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 270-316 (1996)
• [Publications] Ajith-Kumar, S. et al.: "The pyroxene granulites of Kunnampara, Trivandrum block, southern India (Stop-1, Field Guide)." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 327-332 (1996)
• [Publications] Saritha, R. & Santosh, M.: "The incipient charnockites of Kottavattom, Trivandrum Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 341-346 (1996)
• [Publications] Ajith-Kumar, S. & Santosh, M.: "The massive charnockite at Eripara, Trivandrum Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 347-350 (1996)
• [Publications] Radhika, U. P. et al.: "The granulite facies metapelites (khondalite) and associated cordierite + graphite veins at Chittikara, Trivandrum Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 351-356 (1996)
• [Publications] Satish-Kumar. M. & Santosh, M.: "Wollastonite-bearingm calc-silicate rocks adjacent to charnockites at Nuliam, Trivandrum Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 357-364 (1996)
• [Publications] Rajesh, H. M. & Santosh, M.: "The Pan-African alkaline syenite of Puttetti, Nagercoil Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 365-370 (1996)
• [Publications] Satitha, R. & Santosh, M.: "The massive charnockite-metapelite xenolith at Kottaram, Nagercoil Block, southern India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 371-376 (1996)
• [Publications] Satish-Kumar. M. & Santosh, M.: "The canl-silicate rocks and marbles of Ambasamudram, southern Tamil Nadu, South India." Gondwana Research Group Memoir 3 "The Archaean and Proterozoic Terrains of Southen India, Text book and Field Guide". Field Science Pub. , Osaka. 377-387 (1996)
• [Publications] Yoshida, Masaru et al.: "Three major reworking events in the lndia-Sri Lanka-Antarctic sector of East Gondwana." Gondwang 9 (vol. 2). Oxford and IBH Pub. , New Delhi. 983-988 (1996)
• [Publications] Yoshida, M. and Santosh, M.: "Precambeian India Within East Gondwana : Introduction." Jour. Southeast Asian Earth Sciences. 14, 3-4. 117-118 (1996)
• [Publications] Harris, N. B. W. et al.: "Neodymium isotope constraints on the tectonic evolution of East Gondwana." Jour. Southeast Asian Earth Sciences. 14, 3-4. 119-125 (1996)
• [Publications] Yoshida, Masaru et al.: "Geochronologic constraints of granulite terrains of South India and its implications to the Precambrian Gondwana assembly." Jour. Souutheast Asian Earth Sciences. 14, 3-4. 137-147 (1996)
• [Publications] Shaw, R. K. and Arima, M.: "Mineral chemistry, reaction textures, thermobarometry and P-T path from orthopyroxene granulites of Rayagada, Eastern Ghats, India." Jour. Southeast Asian Earth Sciences. 14, 3-4. 175-184 (1996)
• [Publications] Nagaswara Rao et al.: "Geochemical Characters of lepynites from Visakhapatnam area in Eastern Ghats Granulite Terrain." Jour. Southeast Asian Earth Sciences. 14, 3-4. 199-208 (1996)
• [Publications] Satish-Kumar, M. et al.: "Calcsilicate assemblages from the Kerala Khondalite Belt : Implications for Pressure-temperature fluid evolutions." Jour. Southeast Asian Earth Sciences. 14, 3-4. 245-264 (1996)
• [Publications] Radhika, U. P. and Santosh, M.: "Shear-zone hosted graphite in southern Kerala, India. Implications for CO2 infiltration." Jour. Southeast Asian Earth Sciences. 14, 3-4. 265-273 (1996)
• [Publications] Rajesh, H. M. et al.: "The felsic magmatic province in East Gondwana : Implications for Pan-african tectonics." Jour. Southeast Asian Earth Sciences. 14, 3-4. 275-291 (1996)
• [Publications] Suwa, K. et al.: "Vanadium grossular from the Mozambiqe metamorphic rocks, south Kenya." Jour. Southeast Asian Earth Sciences. 14, 3-4. 299-308 (1996)
• [Publications] Tani, Yasutaka and Yoshida, M.: "Strctural evolution of the Arena Gneiss and its bearing on the Proterozoic tectonics of Sri Lanka." Jour. Southeast Asian Earth Sciences. 14, 3-4. 309-329 (1996)
• [Publications] Satish-Kumar, M. et al.: "Colour-coded compositional mapping of reaction textures in a calc-silicate-charnockite interface at Nuliam, Kerala." Jour. Geol. Soc. India. 48. 507-516 (1996)
• [Publications] Rajesh, H. M. and Santosh, M.: "Flouirapatite from alkaline pegmatites of Kerala Khondalite Belt : A petrologic and flid inclusion study." Jour. Geol. Soc. India. 48. 637-646 (1996)
• [Publications] Omana, P. K. and Santosh, M.: "Laterite profile geochemistry in otlining supergene gold deposites : A case study from Nilambur, Kerala." Jour. Geol. Soc. India. 48. 139-150 (1996)
• [Publications] Shaw. R. K. and Arima, M.: "High temperature metamorphic imprint form calc silicate granulites of Rayagada, Eastern Ghats : Implication for the isobaric cooling path." Contrib. Mineral. Petrol.126. 169-180 (1996)
• [Publications] Shaw, R. K.: "Structural features of granulites from Rayagada, Eastern Ghats, India : Some preliminary observations." Jour. Min. Petrol. and Economic Geol.91・12. 443-454 (1996)
• [Publications] Shaw, R. K. et al.: "Pleliminary geochronological results of a suite of granulites from Eastern Ghats, India." Gondwana News Letter. 7. xiv-xv (1996)
• [Publications] Satish-Kumar, M.: "Significance of wollastonite-and scapolite-bearing assemblages from the Kerala Khondalite Belt, southern India." Gondwana News Letter. 7. xii-xiii (1996)
• [Publications] Tani, Yasutaka: "Collision tectonics of the Wanni and Highland complexes in Sri Lanka." Gondwana News Letter. 7. xvi-xvii (1996)
• [Publications] Rajesh, H. M. and Santosh, M.: "Metamorphic charactersitics of fluid controlled granulite formation : A case study from Kerala Khondalite Belt (KKB) , South India." Jour. Geosci. , Osaka City University. 40 (印刷中). (1997)
• [Publications] Satish-Kumar, M. et al.: "Contrasting fluid infiltration patterns in calc-silicates and marbles from the kerala Khondalite Belt, Southern India." Jour. Geosci. , Osaka City University. 40 (印刷中). (1997)
• [Publications] Tani, Yasutaka: "A preliminary study of the deformatioinal structures and evolution of the high-grade gneisses around Kegalla in central Sri Lanka." Jour. Geosci. , Osaka City University. 40 (印刷中). (1997)
• [Publications] Rao, A. T. et al.: "Petrography and geochemistry of banded iron formation from Ongole-Koniedu areas in the Eastern Ghats Belt, South India." Indian Mineralogists. (印刷中). (1997)
• [Publications] Shaw. R. K. and Arima, M.: "Retrograde pressure-temperature path for spinel bearing metapelites in Rayagada, Eastern Ghats, India." Mineralogy and Petrology. (印刷中). (1997)
• [Publications] Yoshida, Masaru et al.: "Recent advances in the studey of Proterozoic events in East Gondwana : Contributions of IGCP -368 during 1995-1996." Gondwana News Letter. 8 (印刷中). (1997)
• [Publications] 吉田 勝: "インドと南極の先カンブリア代地質対比-東ゴンドワナにおける周東南極変動とパンアフリカ変動の研究-" 加藤誠教授退官記念論文集. (印刷中). (1997)
• [Publications] Santosh, M. and Yoshida, M.: "The Archaean and Proterozoic Terrains of Southern India Within East Gondwana. Text Book and Field Guidebook." Field Science Publishers, Osaka, 403 (1996)
• [Publications] Santosh, M. and Yoshida, M.: "Proceedings of the UNESCO-IUGS-IGCP-368 International Field Workshop on the Proterozoic Continental Crust of Southern India, Trivandrum (India), August 20-27, 1996." Field Science Publishers, Osaka, 130 (1996)
• [Publications] Yoshida, Masaru et al.: "Precambrian India Within East Gondwana. Special Issue of Jour. Southeast Asian Earth Sciences." Pergamon/Elsevier, Oxford, 329 (1996)
• [Publications] 吉田勝ほか: "ゴンドワナニュースレター No.7" フィールドサイエンス出版(大阪), 28 (1996)
• [Publications] Yoshida, M. and Santosh, M.: "Gondwana News Letter No.7" Field Science Publishers (Osaka) and Pergamon/Elseveir (Oxford) (印刷中), (1996)
• [Publications] 吉田勝ほか: "ゴンドワナニュースレター No.8" フィールドサイエンス出版(大阪)(印刷中), (1997)
• [Publications] Yoshida, M. and Santosh, M.: "Gondwana News Letter No.8" Field Science Publishers (Osaka) and Pergamon/Elseveir (Oxford) (印刷中), (1997)
• [Publications] Rao, A. T. et al.: "Crustal Section of Peninsular Gneiss-Gondwana-Eastern Ghats, India. Field Excursion Guide Book." Geological Society of India (Banalore) (印刷中), (1997)