| 云南元谋盆地干润变性土中次生方解石特征及形成 |
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| 引用本文： | 丁桑岚 黄成敏 王成善. 云南元谋盆地干润变性土中次生方解石特征及形成[J]. 岩石矿物学杂志, 2004, 23(3): 257-260 |
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| 作者姓名： | 丁桑岚 黄成敏 王成善 |
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| 作者单位： | 1. 四川大学,环境科学与工程系,四川,成都,610065
2. 成都理工大学,沉积地质研究所,四川,成都,610059 |
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| 基金项目： | 国家 973项目子项目专题资助 (G19980 40 80 0 )，教育部振兴行动计划资助项目 ( 0 0 82 2 0_412 70 2 4) |
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| 摘 要： | 土壤新生体对于研究区域环境变化、营养元素释放以及次生成矿作用具有重要意义。利用化学分析、X射线衍射、偏光显微镜和扫描电子显微镜等探讨云南省元谋盆地干润变性土钙质结核中的次生方解石的特征和形成过程。结果表明，钙质结核中次生方解石含量高，晶形完整；钙质结核以及次生方解石形成既取决于气候，也与微地形有关。次生方解石的形成过程及特征反映了自全新世以来元谋盆地主要处于干热气候环境中。
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| 关 键 词： | 干润变性土 钙质结核 次生方解石 形成过程 干热气候 元谋盆地 |
| 文章编号： | 1000-6524(2004)03-0257-04 |
Characteristics and formation of secondary calcites in ustic vertisols of Yuanmou Basin,Yunnan Province |
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| DING Sang-lan,HUANG Cheng-min and WANG Cheng-shan. Characteristics and formation of secondary calcites in ustic vertisols of Yuanmou Basin,Yunnan Province[J]. Acta Petrologica Et Mineralogica, 2004, 23(3): 257-260 |
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| Authors: | DING Sang-lan HUANG Cheng-min WANG Cheng-shan |
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| Affiliation: | DING Sang-lan~1,HUANG Cheng-min~1 and WANG Cheng-shan~2 |
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| Abstract: | The neogenic soil body is of great significance in the study of regional environmental evolution, nutrition element release and secondary ore formation. Using such means as chemical analysis, X-ray diffraction pattern, polarizing microscopy and scanning electronic microscopy, this paper has discussed the features and formation processes of secondary calcites in calcium nodules within ustic vertisols in Yuanmou Basin, Yunnan Province. Secondary calcites dominate calcium nodules, and the crystallinity of calcites is high. Calcium nodules and secondary calcites are closely related to climate and micromorphology. The features and formation of calcites reveal that dry and hot climate has prevailed in Yuanmou Basin since Holocene. |
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| Keywords: | ustic vertisols calcium nodule secondary calcites formation process dry and hot climate Yuanmou Basin |
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