| 重金属的“射流晕”分布现象及其环境学意义 |
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| 引用本文： | 周子勇,陶澍.重金属的“射流晕”分布现象及其环境学意义[J].地学前缘,2002,9(2):345-349. |
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| 作者姓名： | 周子勇 陶澍 |
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| 作者单位： | 北京大学,城市与环境学系,地表过程分析与模拟教育部重点实验室,北京,100871 |
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| 基金项目： | 中国科学院资助项目，教育部留学回国人员科研启动基金，40024101，，， |
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| 摘 要： | 射流晕是一种地球化学次生晕。无论在金属矿的上方还是在石油层的上方都普遍存在有重金属元素的射流晕分布现象。射流晕的形成主要与迁移态的元素有关 ,其特点主要表现在两个方面 :一是迁移距离远 ,可以直达地表 ;其次是在源的上方近于垂直分布。因此通过对地表重金属射流晕的研究 ,可以更准确地确定金属源的位置。射流晕的形成机制可能与地球的排气作用有关。由于地球内部含有丰富的气体 ,在地球的排气过程中 ,源于地球深部的重金属元素有可能在气泡作用下穿过深厚的岩层迁移到地表甚至近地表的大气中。在重金属地质污染源的上方同样也可能形成重金属的射流晕分布 ,因此研究重金属的射流晕现象在环境研究中有重要意义。本文讨论了重金属射流晕的特征、形成机制以及在环境研究中的意义。
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| 关 键 词： | 地气 重金属 迁移 射流晕 环境污染 |
| 文章编号： | 1005-2321(2002)02-0345-05 |
| 修稿时间： | 2001年8月22日 |
JET HALO DISPERSION OF HEAVY METALS AND IT'S SIGNFICANCE IN ENVIRONMENTAL STUDY |
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| ZHOU Zi\|yong,TAO Shu.JET HALO DISPERSION OF HEAVY METALS AND IT''''S SIGNFICANCE IN ENVIRONMENTAL STUDY[J].Earth Science Frontiers,2002,9(2):345-349. |
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| Authors: | ZHOU Zi\|yong TAO Shu |
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| Abstract: | Jet halo is a kind of geochemical secondary halo. The heavy metal jet halo is a universal phenomenon either above mineral or above oil deposits, its formation is relevant to mobile metal. The jet halo dispersion has two features: migration in a long distance from the source-even to the earth surface and nearly vertical distribution above the source, which implies the possibility of locating the source more accurately by the detection of jet halo on the earth surface. The mechanism of formation of jet halo may be associated with earth degassing. Because the earth abounds with gases, as a result of degassing of the earth, heavy metals, coming from deep source inside the earth, can transport through thick rock to the surface of the earth, even to atmosphere near the surface of the earth under action of gaseous bubbles. There also exists jet halo above pollution source of heavy metal, therefore it is of significance in environmental research to study the jet halo. In this paper the features and forming mechanism of jet halo and its significance for environmental study are discussed. |
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| Keywords: | geogas heavy metal migration jet halo environmental pollution |
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