書誌事項
- タイトル別名
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- ミナミ アフリカ サザーランド グリーンストンタイ クレイン レタバ コウザン
- Compositional Zoning of Garnet in Pelitic Schist from Klein Letaba Mine, Sutherland Greenstone Belt, South Africa
- ミナミアフリカ サザーランド グリーンストンタイ クレイン レタバ コウザンサン デイシツ ヘンガンチュウ ノ ザクロイシ ニ ミラレル ソセイ ルイコウゾウ
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The Sutherland Greenstone Belt, located near the northeastern edge of the Kaapvaal Craton in South Africa, is composed mainly of Archean metasedimentary and metavolcanic rocks of amphibolite grade. Sample of pelitic schist collected from Klein Letaba Mine contains mineral assemblage of quartz, plagioclase, garnet, biotite, anthophyllite, gedrite, kyanite, staurolite, and tourmaline. Compositional profile of euhedral garnet shows growth zoning pattern (Fe+Mg increases and Ca+Mn decreases continuously from core to rim) which was produced during prograde metamorphism. In contrast, edge of the garnet is characterized by reverse trend; Fe+Mg decreases and Ca+Mn increases from rim to edge. The garnet is considered to have suffered subsequent overgrowth or modification of composition near the edge of the crystal after peak metamorphism. The retrograde event may be associated with thrusting of the high-grade Limpopo Belt onto the low-grade Kaapvaal Craton.
収録刊行物
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- Memoirs of the Faculty of Education, Shimane University. Natural science
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Memoirs of the Faculty of Education, Shimane University. Natural science 27 (1/2), 27-36, 1993-12-25
島根大学教育学部
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詳細情報 詳細情報について
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- CRID
- 1050564288436555776
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- NII論文ID
- 110000463340
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- NII書誌ID
- AN00107941
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- ISSN
- 05869943
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- NDL書誌ID
- 3875761
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- 本文言語コード
- en
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- 資料種別
- departmental bulletin paper
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- データソース種別
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- IRDB
- NDL
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