| 黔中红粘土的物质来源与成因研究——以平坝剖面为例 |
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| 引用本文： | 周德全,王世杰,季宏兵.黔中红粘土的物质来源与成因研究——以平坝剖面为例[J].矿物学报,2006,26(3):249-256. |
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| 作者姓名： | 周德全 王世杰 季宏兵 |
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| 作者单位： | 1. 贵州师范大学,地理与生物科学学院,贵州,贵阳,550001
2. 中国科学院,地球化学研究所,环境地球化学国家重点实验室,贵州,贵阳,550002 |
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| 基金项目： | 中国科学院科研基金，国家自然科学基金 |
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| 摘 要： | 以黔中平坝剖面为具体对象,从矿物、元素地球化学、元素质量平衡等多方面对黔中白云岩上覆红粘土剖面进行了详细研究。结果显示该剖面是下伏基岩白云岩风化成土并累积的结果,无其他外来物源,是原位风化壳;成土过程具有两阶段模式特征,即白云石、方解石的溶蚀-酸不溶物累积和酸不溶物进一步风化两个阶段;长时期的构造稳定和白云岩整体溶蚀作用是黔中地区白云岩风化壳土层厚度大、分布连续的主要制约因素。
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| 关 键 词： | 红粘土 物质来源 成因 平坝剖面 黔中 |
| 文章编号： | 1000-4734（2006）03-0249-08 |
| 收稿时间： | 2006-05-19 |
| 修稿时间： | 2006年5月19日 |
THE MATERIAL SOURCES AND GENESIS OF WEATHERING CRUST OVERLYING DOLOMITE ROCK IN CENTRAL GUIZHOU PROVICE——An-EXAMPLE FROM THE PINGBA PROFILE |
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| ZHOU De-quan,WANG Shi-jie,JI Hong-bing.THE MATERIAL SOURCES AND GENESIS OF WEATHERING CRUST OVERLYING DOLOMITE ROCK IN CENTRAL GUIZHOU PROVICE——An-EXAMPLE FROM THE PINGBA PROFILE[J].Acta Mineralogica Sinica,2006,26(3):249-256. |
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| Authors: | ZHOU De-quan WANG Shi-jie JI Hong-bing |
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| Institution: | 1. School of Geographic and Biologic Sciences,Guizhou Normal University,Guizhou 550001,China;2.The State Key Laboratroy of Eraniromental Geochemistry,Institute of Geochemistry,CAS Guiyang 550002,China |
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| Abstract: | This paper presents the mineral compositions,the contents of Al_2O_3 and Zr,TiO_2/Al_2O_3 and Fe_2O_3 T/Al_2O_3 ratios,SiO_2/Al_2O_3 and K_2O/Na_2O ratio,the ratios of mobile to immobile elements(Ca/Al,Mg/Al,Na/Al, K/Al and Mn/Al) and between the immobile elements(Al/Zr,Ti/Zr and Ti/Nb),gains or losses of the major elements along the weathering profile of Pingba red residua on the karst terrains of centrl Guizhou,the teconic characteristics of this region,and the weathering characteristics of dolomite.The results demonstrate that the Pingba red residua is a typical in situ chemical weathering crust,and the material sources of the profile are derived from underlying Triassic dolomites,the chemical weathering of dolomite can be divided into two stages:"leaching-accumulating trend" and weathering trend",the stable teconic and whole weathering of dolomite should be the main reason for the development of thick and consecutive red weathering crust overlying dolomite rock in central Guizhou. |
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| Keywords: | weathering crust of dolomite rock material source genesis Pingba profile |
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