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引用本文:段轶仁,杨忠芳,杨琼,郑国东,卓小雄,陈彪. 广西北部湾地区土壤锗分布特征、影响因素及其生态环境评价[J]. 中国地质, 2020, 47(6): 1826-1837.
DUAN Yiren,YANG Zhongfang,YANG Qiong,ZHENG Guodong,ZHUO Xiaoxiong,CHEN Biao. The distribution, influencing factors and ecological environment evaluation of soil germanium in Beibu Gulf of Guangxi Zhuang Autonomous Region[J]. Geology in China, 2020, 47(6): 1826-1837(in Chinese with English abstract).
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广西北部湾地区土壤锗分布特征、影响因素及其生态环境评价
段轶仁1, 杨忠芳1, 杨琼1, 郑国东2, 卓小雄2,3, 陈彪2
1.中国地质大学(北京)地球科学与资源学院, 北京 100083;2.广西地质调查院, 广西 南宁 530023;3.广西壮族自治区地质矿产勘查开发局, 广西 南宁 530023
摘要:
Ge在工业和医疗领域具有良好应用前景,有机锗化合物是一种毒性较低、具有较强抗癌活性的物质,富Ge土壤具有广阔的开发利用价值,但目前我国对土壤Ge的研究程度较低。基于广西壮族自治区多目标区域地球化学调查成果,对北部湾地区表层土壤及深层土壤Ge的空间分布特征进行了研究,阐明了不同成土母质地区表层土壤及深层土壤Ge含量情况,总结了影响土壤Ge含量的因素。结果表明,广西北部湾地区表层土壤Ge含量平均值是1.43 mg/kg,深层土壤Ge含量平均值是1.64 mg/kg。土壤Ge含量主要受控于成土母质,碳酸盐岩分布区土壤Ge含量最高,其次为花岗岩分布区、第四系沉积物分布区以及砂-页岩分布区。表层土壤与深层土壤Ge含量的比值显示表层土壤Ge含量受人为活动影响小。不同成土母质形成的土壤Ge含量的影响因素存在差异,花岗岩分布区表层土壤与深层土壤Ge含量主要受土壤黏土矿物、三水铝石以及石英的影响,碳酸盐岩、砂-页岩及第四系沉积物分布区表层土壤Ge含量主要受土壤黏土矿物、三水铝石、次生含铁矿物、无定形铁氧化物/氢氧化物、石英及有机质的影响,深层土壤Ge含量主要受土壤黏土矿物、三水铝石、次生含铁矿物、无定形铁氧化物/氢氧化物及石英的影响。研究区53.32%的表层土壤Ge含量达到较丰富水平,30.21%的表层土壤Ge含量达到丰富水平,对富Ge农作物的生长非常有利,具有开发利用价值。本文的研究成果旨在为土壤Ge的生态地球化学特征提供基础资料,为富Ge土地资源评价和富Ge农产品开发利用提供依据。
关键词:    土壤  分布特征  影响因素  地质调查工程  北部湾  广西
DOI:10.12029/gc20200618
分类号:P632
基金项目:中国地质调查“广西壮族自治区多目标区域地球化学调查北海地区(GZTR20080110)、南宁地区(GZTR20060115)、贵港地区(GZTR20070107)”,广西玉林地区多目标区域地球化学调查(12120113000600),广西典型土壤重金属生态地球化学研究项目以及广西土壤Se、Ge、Cd等元素异常成因与生态效应研究项目联合资助。
The distribution, influencing factors and ecological environment evaluation of soil germanium in Beibu Gulf of Guangxi Zhuang Autonomous Region
DUAN Yiren1, YANG Zhongfang1, YANG Qiong1, ZHENG Guodong2, ZHUO Xiaoxiong2,3, CHEN Biao2
1.School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;2.Guangxi Institute of Geological Survey, Nanning 530023, China;3.Guangxi Bureau of Geology&Mineral Prospecting&Exploitation, Nanning 530023, China
Abstract:
Germanium has application prospects in both industrial and medical fields, organogermanium compounds exhibit low toxicity and antitumor activity. It is valuable to develop Ge-rich soil, whereas the research on soil Ge is still insufficient in China. Based on multi-purpose regional geochemical survey in Guangxi, the authors studied the spatial distribution of Ge in top soil and deep soil in Beibu Gulf in this paper. The Ge values of top soil as well as deep soil derived from various parent materials were elucidated, and the factors that influence soil Ge content were summarized. The results show that the average values of Ge in top soil and deep soil are 1.43 mg/kg and 1.64 mg/kg, respectively. The Ge values are critically controlled by parent materials, and the soil derived from carbonates has the highest Ge content, followed by soil that has originated from granites, Quaternary sediments, sandstones and shales. The ratios of top soil Ge values and deep soil Ge values indicate that Ge values of top soil are effected little by anthropogenic activities. The influencing factors of Ge contents vary in soils derived from different parent materials. As for top soil and deep soil derived from granites, Ge values are primarily influenced by clay minerals, gibbsite and quartz in soil. In contrast, for soils derived from carbonates, Quaternary sediments, sandstones and shales, top soil Ge values are primarily influenced by clay minerals, gibbsite, secondary Fe-bearing minerals, amorphous Fe oxyhydroxides, quartz and organic matters in soil, and deep soil Ge values are primarily influenced by clay minerals, gibbsite, secondary Fe-bearing minerals, amorphous Fe oxyhydroxides and quartz in soil. 53.32% of top soil have a slightly-rich level of Ge values and 30.21% of top soil have a rich level of Ge values, which are beneficial for Ge-rich agricultural crops cultivation and worthwhile for further exploitation. The objects of this study are to provide basic information for Ge ecogeochemistry, support Ge-rich soil and agricultural products development.
Key words:  germanium  soil  distribution characteristics  influencing factors  geological survey engineering  Beibu gulf  Guangxi