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- 青矢 睦月
- 名古屋大学大学院環境学研究科 産業技術総合研究所地質情報研究部門
書誌事項
- タイトル別名
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- Derivation of Subduction-Stage Pressure-Temperature Path of Sambagawa Eclogite and its Tectonic Significance
- サンバガワ エクロジャイト ノ シズミ コミ P T ケイロ ノ ドウシュツ ト ソノ テクトニック ナ イミヅケ ホウカツテキ ガンセキガク エ ノ フセキ ト シテ
- Towards the Goal of a Comprehensive Petrology
- 包括的岩石学への布石として
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説明
In general, derivation of subduction-stage P-T (pressure-temperature) paths for high-P metamorphic rocks is difficult, because in most cases they are affected by subsequent metamorphism, during which the pre-peak P mineral assemblages are significantly modified. However, petrological studies during the last 10 years in the Sambagawa belt have recognized unusually well-constrained sections of the subduction-stage P-T path. In particular, derivation of the subduction-stage P-T path of the Kotsu glaucophane eclogite was backed-up by insights obtained from a combination of petrological and structural analyses. Application of a new thermal model shows that the derived subduction-stage P-T paths are most likely to have been generated in a setting where an active spreading ridge is close to being subducted. This tectonic interpretation suggests that exhumation of high-P/T metamorphic rocks in oceanic subduction zones is triggered by regional heating events such as ridge subduction. A review of recent studies on the Sambagawa belt indicates the significance of promoting a 'comprehensive petrology', which encompasses the full set of constraints provided by disciplines such as petrology, structural geology, geochronology and thermal modeling.
収録刊行物
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- 地学雑誌
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地学雑誌 113 (5), 664-677, 2004
公益社団法人 東京地学協会
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詳細情報 詳細情報について
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- CRID
- 1390282679207082496
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- NII論文ID
- 10017474254
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- NII書誌ID
- AN00322536
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- COI
- 1:CAS:528:DC%2BD2MXmt1eltg%3D%3D
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- ISSN
- 18840884
- 0022135X
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- NDL書誌ID
- 7190501
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