第四纪土壤微生物与金离子的相互作用实验:微生物找矿依据  

INTERACTION BETWEEN GOLD ION AND QUATERNARY SOIL MICROORGANISM:BIOEXPLORATION INDICATION

作　　者：王红梅[1] 杨逢清[1] 谢树成[1] 周修高[1] 

机构地区：[1]中国地质大学地球科学学院,武汉430074

出　　处：《海洋地质与第四纪地质》2002年第4期107-110,共4页Marine Geology & Quaternary Geology

基　　金：教育部优秀青年教师基金资助项目;国土资源部科技项目(2000441);原地矿部科技攻关项目

摘　　要：利用第四纪土壤微生物蜡样芽孢杆菌Bacilluscereus芽孢计数法可以指示下伏基岩的金矿化。提取金矿化区和非矿化区第四纪土壤的B.cereus,进行微生物与金离子的相互作用实验,探讨金离子与B.cereus芽孢计数的本质联系,从而为解决该找矿法的理论基础提供依据。实验证实,低含量的金离子不能促进B.cereus转化成芽孢;当金含量升高到一定范围时,可以对B.cereus的生长产生抑制作用,促使其由营养体向芽孢转化,使矿化区土壤芽孢计数值很高,从而具有找矿指示意义。The Quaternary soil microorganism, Bacillus cereus, is reported as an effective indicator of the underlying gold mineralization.The experiments of interaction between gold ion and soil B.cereus isolated from gold mining regions and background regions were carried out to validate the relationship between gold contents and the spore numbers of B.cereus and to solidify the theoretical basis of this bioexploration method.Results showed,gold ion with a specific high concentration in culture solutions is capable of prohibiting the growth of B.cereus and promoting the sporulation,which will result in the occurrence of an abnormal enrichment of B.cereus spore counts in soils over the mineralized regions.Therefore,the cluster of high spore counts,in turn,can serve as an exploration tool to the subsurface mineral deposits.

关 键 词：金离子 金矿床 BacillusCereus芽孢计数法 微生物 土壤 第四纪 找矿方向 

分 类 号：P618.51[天文地球—矿床学]