| 岩土系统地球化学行为及其对岩溶作用驱动--以丫吉村岩溶试验场为例 |
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| 引用本文： | 陶于祥,潘根兴,孙玉华,滕永忠,韩富顺.岩土系统地球化学行为及其对岩溶作用驱动--以丫吉村岩溶试验场为例[J].岩石矿物学杂志,1998,17(4). |
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| 作者姓名： | 陶于祥 潘根兴 孙玉华 滕永忠 韩富顺 |
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| 作者单位： | 1. 中国地质科学院南京地质矿产研究所,南京,210016
2. 南京农业大学资源环境学院,南京,210095 |
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| 摘 要： | 岩溶成土过程为Ｃ、Ｃａ、Ｍｇ淋失，Ｆｅ、Ｍｎ、Ｃｕ、Ｐｂ、Ｚｎ和酸不溶物相对累积的地球化学过程。试验场生物碳库量巨大，实验表明：植物残体在第一季度快速分解，可产生大量ＣＯ２参予岩溶作用；岩溶土壤有机碳含量高、储量大，表层土、鞍部、坡地土松结态有机碳含量高，为岩溶ＣＯ２的潜在来源；土壤有机碳可被酸性溶液（ＫＭｎＯ４）氧化，Ａ层土比Ｂ层土更易被氧化。土壤ＣＯ２含量、释放的野外监测实验结果：湿润气候条件下岩溶作用较为发育。Ｃ１３特征表明：土壤有机碳为土壤ＣＯ２的主要来源，土壤ＣＯ２为岩溶泉ＨＣＯ－３不容忽视的重要来源。土壤、有机质对石灰岩溶蚀实验表明：土壤有机质对石灰岩溶蚀具明显的促进作用，雨季比旱季、坡地比洼地岩溶作用更加发育。
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| 关 键 词： | 岩土系统 地球化学 有机碳 溶蚀实验 岩溶作用 |
Geochemical Behavior of the Rock_Soil System and Its Driving Action on Karstification-Exemplified by the Yaji Karst Experimental Site |
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| Tao Yuxiang,Pan Genxing,Sun Yuhua,Teng Yongzhong,Han Fushun.Geochemical Behavior of the Rock_Soil System and Its Driving Action on Karstification-Exemplified by the Yaji Karst Experimental Site[J].Acta Petrologica Et Mineralogica,1998,17(4). |
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| Authors: | Tao Yuxiang Pan Genxing Sun Yuhua Teng Yongzhong Han Fushun |
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| Abstract: | The process of karst soil formation lies in the decrease of C, Ca, Mg and accumulation of Fe, Mn, Cu, Pb, Zn and acid indissoluble substance. The biomass carbon is vast at the experimental site. Experiments show that plant remnant is rapidly decomposed in the first season after bury and hence releases a large volume of CO 2 to take part in karstification. The organic carbon content of soil (SOC) is great, and SOC is preserved in large quanitites. Loosely combined SOC content of surface material, slope and saddle soil is high, serving as the potential source of karst CO 2. SOC may be oxidized by acid solution (KMnO 4 solution). SOC in Layer A is more easily oxidized than that in Layer B. The field monitoring experimental study on CO 2 in soil and its emission rate suggests that karstification is more active under the humid weater condition. The characteristics of C 13 indicate that SOC is the main source of soil CO 2, and soil CO 2 is an important source of karst spring HCO - 3. The experiments on relationships of soil, organic matter and limestone dissolution reveal that karstification is obviously stimulated by soil and organic matter. Karst is better developed in humid season and in slope. |
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| Keywords: | rock and soil system geochemistry organic carbon dissolution experiment karstification |
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