| Project/Area Number |
21403010
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OZAWA Kazuhito 東京大学, 理学研究科, 教授 (90160853)
SUZUKI Katsuhiko 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, グループリーダー (70251329)
YOSHIKAWA Masako 京都大学, 理学研究科, 教務補佐員 (00378605)
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| Project Period (FY) |
2009 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2011: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2010: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2009: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Keywords | 島弧深部 / マントル / 下部地殻 / オフィオライト / マグマ活動 / 地殻 / 島弧 / 火成活動 / 中央海嶺 / モホ / 地殻-マントル境界 / アルバニア |
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| Research Abstract |
In order to understand the maturing processes in the deeper part of the Island arc systems, we examined arc-related ophiolites and related rocks from all over the world, particularly in the Mirdita ophiolite, Albania. Based on our filed works coupled with geochemical analyses, we concluded the maturing processes in the deeper part of the Island arc system as follows:
(1) Effect of influx melting due to infiltration of hydrous fluids/melts are increased toward the upper section of the peridotite section, i.e., the upper most mantle section
(2) Silica-enrichment is caused by interaction with slab-derived hydrous fluids
(3) Peridotite massifs in the Western Mirdita Ophiolite, which had been interpreted to be of mid-ocean ridge origin, were originally formed at mid-ocean ridge setting, but was also affected by arc-related hydrous fluids/melts, resulting in the formation of fertile peridotite, such as amphibole-rich peridotites.
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