Two origins of illite at the Dexing porphyry Cu deposit, East China: Implications for ore-forming fluid constraint on illite crystallinity
文献类型：期刊论文
| 作者 | Jin, ZD; Zhu, JC; Ji, JF; Li, FC; Lu, XW |
| 刊名 | CLAYS AND CLAY MINERALS
 |
| 出版日期 | 2002 |
| 卷号 | 50期号:3页码:381-387 |
| 关键词 | alteration hydrothermal fluid Kubler index low-grade metamorphism porphyry Cu deposit |
| ISSN号 | 0009-8604 |
| 英文摘要 | Illite is a distinctive clay mineral formed by K alteration within hydrothermal alteration zones in porphyry Cu deposits. Based on differences in spatial distribution, Kubler index, number of swelling layers, and polytype, two kinds of illite are recognized within the Dexing porphyry Cu deposit, East China. One is a hydrothermal mineral within hydrothermally-altered granodiorite porphyry and altered tuffaceous phyllite near the contact zone with the granodiorite porphyry cupola. The hydrothermal illite is formed by illitization of plagioclase and/or micas during hydrothermal fluid-rock interaction. The considerable variation of their higher Kubler indices (0.17-1.41 degreesDelta2theta) with swelling layer is affected by fluid/rock ratio or fluid flux. The other type of illite is a product of low-grade metamorphism Within tuffaceous phyllite away from the porphyry cupola (>2 km), and has a lower Kubler index (0.06-0.13 degreesDelta2theta), a 2M(1) polytype, and no swelling layers. We suggest that, within the mineralized alteration zone, the lower the Kubler index, the stronger the degree of alteration, and the higher the copper grade. This is caused by a higher fluid/rock ratio in the middle-upper portions of the contact zone. |
| 公开日期 | 2012-03-02 |
| 源URL | [http://159.226.73.51/handle/332005/2427]  |
| 专题 | 南京地理与湖泊研究所_湖泊室 |
| 推荐引用方式 GB/T 7714 | Jin, ZD,Zhu, JC,Ji, JF,et al. Two origins of illite at the Dexing porphyry Cu deposit, East China: Implications for ore-forming fluid constraint on illite crystallinity[J]. CLAYS AND CLAY MINERALS,2002,50(3):381-387. |
| APA | Jin, ZD,Zhu, JC,Ji, JF,Li, FC,&Lu, XW.(2002).Two origins of illite at the Dexing porphyry Cu deposit, East China: Implications for ore-forming fluid constraint on illite crystallinity.CLAYS AND CLAY MINERALS,50(3),381-387. |
| MLA | Jin, ZD,et al."Two origins of illite at the Dexing porphyry Cu deposit, East China: Implications for ore-forming fluid constraint on illite crystallinity".CLAYS AND CLAY MINERALS 50.3(2002):381-387. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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