| 扬子区震旦系磷块岩的化学类型及其地质意义 |
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| 引用本文： | 姚琬圭,王子玉,刘春艳.扬子区震旦系磷块岩的化学类型及其地质意义[J].地层学杂志,1995(1). |
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| 作者姓名： | 姚琬圭 王子玉 刘春艳 |
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| 作者单位： | 中国科学院南京地质古生物研究所 |
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| 摘 要： | 经过对磷块岩化学成分分析，结合矿物分析资料，将磷块岩分成４种化学类型：富磷酸盐型、碳酸盐型、硅质型及富铝型，并探讨了它们的成因及其与沉积环境的关系。磷块岩的化学类型与稀土元素的含量有关，但与稀土元素的组成无关。轻重稀土元素的组成比值ＬＲＥＥ／ＨＲＥＥ＞１反映形成磷块岩的物源主要来自于陆源物。不同地区有相对稳定的轻重稀土比值。
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| 关 键 词： | 震旦系，磷块岩，成因，沉积环境，稀土元素 |
The chemical types of phosphorites of Sinian System in the Yangtze Block and their implications |
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| Yao Wangui, Wang Ziyu ,Liu Chunyan.The chemical types of phosphorites of Sinian System in the Yangtze Block and their implications[J].Journal of Stratigraphy,1995(1). |
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| Authors: | Yao Wangui Wang Ziyu Liu Chunyan |
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| Abstract: | This paper approaches the origin of different kinds of phosphorites which can be divided into the following chemical types: phosphate-rich, carbonate, siliceous and aluminium-rich phosphorites, based on the chemical composition and mineralogy, and their relationship with sedimentary environments. The chemical types of phosphorites depend on the content of rare earth elements rather than their composition. The ratio of LREE to HREE roughly remains stable in a certain area.The >1 ratio indicates that the most supply of phosphorites is provided from terrigenous materials. |
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| Keywords: | Sinian System phosphorites origin sedimentary environments rare earth elements |
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