摘要
根据地球内部气体 (地气 )的释放特征及对生态环境产生的影响 ,文中提出了地气的宏观效应及地气的微观效应的概念。地气的宏观效应主要是由地球内部大量气体的突然释放所引起 ,它具有突发性、宏观性及难于研究的特点。地气宏观效应有多种表现形式 ,如火山爆发、地震前后排气及一些大的自然灾害及自然现象等。地气的微观效应则是由地球内部气体持续微观释放所引起 ,它具有普遍性、微观性及可研究的特点。地气的微观排放及地气作用下物质的远距离迁移是地气微观效应的主要表现形式。研究地气的微观排放对于研究温室气体及气候变化有重要意义 ,而研究地气作用下物质的远距离迁移现象对于石油、金属矿的勘探以及在环境研究中都有重要的意义。本文阐述了地气宏观效应及地气微观效应的定义、特点、表现形式及其研究意义。
According to the emanation feature of gas within the Earth (geogas) and the impact of geogas on the earth environment, two concept—macroimpact and microimpact of geogas are put forward in this paper. The macroimpact of geogas is linked with the abrupt emanation of gas within the Earth, and its abrupt occurrence and macroscopical scale are obstacles to the study of the impact. The macroimpact of geogas has various forms,e g volcano abruption, degassing before and after earthquake, some tremendous nature calamities,and so on. The microimpact of geogas is related with the continuous microemanation of gases within the Earth, it occurs universally but microscopically on the earth and is relatively easier to study.The microemanation of gases and matter transport under the action of geogas flow are the two main forms of microimpact. The study of the microemanation of gases is significant in the study of greenhouse gases, and matter transport under the action of geogas flow— in the oil,gases and mineral deposits prospecting and in the environmental research. The concepts of macroimpact and microimpact of geogas are given in this paper, and their features,forms and significance in geoscientific research are discussed.
出处
《地学前缘》
EI
CAS
CSCD
2003年第1期249-255,共7页
Earth Science Frontiers
基金
留学回国人员科研启动基金
