地理科学 ›› 2017, Vol. 37 ›› Issue (6): 944-951.doi: 10.13249/j.cnki.sgs.2017.06.017
张晓娟1(), 季宏兵2(
), 冯晓静1, 温月花1, 张涛1, 熊凯1
收稿日期:
2016-07-25
修回日期:
2016-12-15
出版日期:
2017-06-20
发布日期:
2017-06-20
作者简介:
作者简介:张晓娟(1990-),女,山西阳泉人,硕士,研究方向为环境地球化学。E-mail:
基金资助:
Xiaojuan Zhang1(), Hongbing Ji2(
), Xiaojing Feng1, Yuehua Wen1, Tao Zhang1, Kai Xiong1
Received:
2016-07-25
Revised:
2016-12-15
Online:
2017-06-20
Published:
2017-06-20
Supported by:
摘要:
选取云南石林红土剖面作为研究对象,探讨在岩溶盆地这一独特地貌单元中主量、稀土元素的地球化学特征。研究表明:① 云南石林土壤中主量和稀土元素的组成具有较好的一致性;② 通过对化学蚀变指数(CIA)与Na/K比值关系图以及A-CN-K(Al2O3-CaO*+Na2O-K2O)三角图分析发现:石林地区2个剖面均经历了温暖湿润环境下的强烈化学风化作用;石林地区土壤中稀土元素含量较高,其稀土元素球粒陨石标准化分布模式表现出高度相似性,且继承了基岩的特征,两者均表现为Eu处负异常,但剖面CK在Ce处表现为负异常,而剖面KP在Ce处无明显变化;③ 2个剖面元素组成及含量变化基本保持一致,表明此地土壤受外来物质影响程度较小,2个剖面的元素地球化学特征与基岩存在一定相似性。
中图分类号:
张晓娟, 季宏兵, 冯晓静, 温月花, 张涛, 熊凯. 岩溶盆地红土风化剖面的元素地球化学研究[J]. 地理科学, 2017, 37(6): 944-951.
Xiaojuan Zhang, Hongbing Ji, Xiaojing Feng, Yuehua Wen, Tao Zhang, Kai Xiong. Element Geochemistry Characteristic of the Red Soil Weathering Profiles in the Karst Basin[J]. SCIENTIA GEOGRAPHICA SINICA, 2017, 37(6): 944-951.
表1
主量元素氧化物质量分数(%)"
剖面号 | 统计量 | SiO2 | Al2O3 | TFe2O3 | K2O | Na2O | CaO | MgO | MnO | TiO2 | P2O5 | CIA |
---|---|---|---|---|---|---|---|---|---|---|---|---|
CK | 最大值 | 40.59 | 28.36 | 15.39 | 0.890 | 0.077 | 0.522 | 0.645 | 0.086 | 1.860 | 0.160 | 96.460 |
最小值 | 34.30 | 23.95 | 14.32 | 0.737 | 0.032 | 0.412 | 0.506 | 0.056 | 1.630 | 0.129 | 95.370 | |
平均值 | 37.41 | 26.03 | 14.78 | 0.814 | 0.044 | 0.449 | 0.563 | 0.065 | 1.748 | 0.147 | 96.192 | |
标准偏差 | 1.757 | 1.197 | 0.293 | 0.046 | 0.010 | 0.028 | 0.040 | 0.008 | 0.054 | 0.009 | 0.256 | |
变异系数 | 0.047 | 0.046 | 0.020 | 0.056 | 0.236 | 0.063 | 0.071 | 0.116 | 0.031 | 0.060 | 0.003 | |
KP | 最大值 | 51.84 | 21.44 | 13.5 | 0.628 | 0.044 | 0.631 | 0.464 | 0.076 | 1.820 | 0.145 | 96.650 |
最小值 | 46.16 | 19.07 | 11.47 | 0.543 | 0.027 | 0.247 | 0.403 | 0.039 | 1.660 | 0.102 | 96.210 | |
平均值 | 48.78 | 20.27 | 12.30 | 0.579 | 0.036 | 0.363 | 0.426 | 0.057 | 1.744 | 0.117 | 96.454 | |
标准偏差 | 1.958 | 0.704 | 0.558 | 0.029 | 0.004 | 0.133 | 0.019 | 0.013 | 0.044 | 0.012 | 0.128 | |
变异系数 | 0.040 | 0.035 | 0.045 | 0.050 | 0.121 | 0.366 | 0.046 | 0.229 | 0.025 | 0.106 | 0.001 | |
上陆壳(UCC) | 66.00 | 15.20 | 5.00 | 3.400 | 3.900 | 4.200 | 2.200 | 0.080 | 0.650 | 0.150 | — |
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