| 高钙钙蔷薇辉石的产出地质特征和晶体化学特征 |
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| 引用本文： | 赵良超,孙淑娟.高钙钙蔷薇辉石的产出地质特征和晶体化学特征[J].吉林地质,1991,10(2):42-49. |
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| 作者姓名： | 赵良超 孙淑娟 |
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| 作者单位： | 吉林省地质科学研究所，吉林省地质科学研究所 |
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| 摘 要： | 高钙钙蔷薇辉石产于吉林市附近的二迭纪大河深组大理岩和中酸性凝灰岩接触变质的接触带矽卡岩内。本文描述了吉林高钙钙蔷薇辉石产出地质特征和矿物学性质,讨论了八面体阳离子在似辉石族晶体化学中的作用,支持了M_3和M_4位阳离子占位格局的不同,进而决定了晶体结构类型,以及M_1和M_2分步替代是钙蔷薇辉石的广泛化学组成变化的观点。
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| 关 键 词： | 辉石 钙蔷薇辉石 地质特征 吉林市 |
THE GEOLOGICAL AND CRYSTAL CHEMICAL FEATURES OF HIGH-CALCIUM BUSTAMITS |
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| Zhao Liangchao Sun Shujuan.THE GEOLOGICAL AND CRYSTAL CHEMICAL FEATURES OF HIGH-CALCIUM BUSTAMITS[J].Jilin Geology,1991,10(2):42-49. |
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| Authors: | Zhao Liangchao Sun Shujuan |
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| Institution: | Jilin Institute of Geological Sciences |
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| Abstract: | The high-calcium bustamite occurs in the skarn formed by contact metamorphism between the marble (referring to the Permian Daheshen Formation) and the intermediate-acid tuff near Jilin city. The paper describes the geological features and mineralogical characteristics of the high-calcium bustamite in Jilin and discusses further the role of octahedral cations in pyroxenoid crystal chemistry, and supports the concept that the differences of cation's occupancy manner in the M_3 and M_4 sites are important for determination of the structure types, whereas the stepwise substitutions in M_1 and M_2 explain the observed compositional variation in bustamite. |
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| Keywords: | High-calcium bustamite Cation occupancy Octahedral site Jilin city |
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