| 法国罗瓦尔河口悬移质中的石膏颗粒及表面新生方解石霰石晶体描述 |
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| 引用本文： | 时伟荣.法国罗瓦尔河口悬移质中的石膏颗粒及表面新生方解石霰石晶体描述[J].岩石学报,1991,7(1). |
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| 作者姓名： | 时伟荣 |
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| 作者单位： | 华北师范大学河口海岸研究所 上海 |
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| 摘 要： | 本文介绍在暖温带河口悬移质中发现的石膏颗粒及其表面的新生方解石和霰石晶体。石膏颗粒经受了不同程度的化学和生物化学风化。在一部分风化石膏表面,存在大量的数微米到数十微米大小的方解石和霰石晶体,某些晶体还呈现出亲岩生物遗留的生长纹。由于河口水的溶蚀作用,一部分石膏颗粒已充分碳酸钙化。
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| 关 键 词： | 石膏 新生方解石 河口悬移质 |
THE DISCOVERY OF GYPSUM DOTTED BY THE NEOFORMED CALCITES AND ARAGONITES IN THE LOIRE ESTUARY, FRANCE |
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| Shi Weirong.THE DISCOVERY OF GYPSUM DOTTED BY THE NEOFORMED CALCITES AND ARAGONITES IN THE LOIRE ESTUARY, FRANCE[J].Acta Petrologica Sinica,1991,7(1). |
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| Authors: | Shi Weirong |
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| Abstract: | In the study of the suspended matters in the Loire estuary in France, some of crystals of gypsum in suspension have been found and analysed under SEM. This paper presents some interesting mineralogical and lithobiological features of these crystals.The gypsum grains are all well-crystallized and frequently twin-crystals. Their surfaces are submitted to biochemical erosions. Due to the bacterial cation numerous neogenesis calcium carbonate micro-crystals "grow"from the gypsum grains and cover them. The formation of these gypsum grains is speculated: because of the severe drought, the sulphides in estuarine muds are transported to the surface, oxidized and transformed to gypsum with the presence of the calcium carbonates. |
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| Keywords: | Gypsum Neoformation of calcite Estuarine suspended matter |
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