摘要
以黑云母为矿物材料,以伯克霍尔德菌为微生物材料进行了矿物风化的长期培养实验。用X射线衍射仪测定了小于1μm粒级的固相产物的矿物成分,用扫描电子显微镜/X射线能谱仪观察和测定了矿物形态和化学成分。结果表明,伯克霍尔德菌菌株8B不仅能加速黑云母的风化进程,而且能促进形成鳞片状和球状粘土矿物(很有可能分别是蛭石和蒙脱石)。通过对次生矿物形成过程的分析,认为蛭石是黑云母通过结构转变的方式而形成,其转化过程具继承型模式的特点;蒙脱石则可能是黑云母溶解后重新结晶而成,属于溶解-沉淀模式。
Long-term culture experiments on biotite weathering were made under the mediation of bacteria Burkholderia sp..The resultant mineral components of less than 1 μm solid fraction at different incubation times were determined by the technique of X-ray diffraction and their morphology was observed by scanning electron microscopy and their chemical composition by energy dispersive spectroscopy.The results indicated that Burkholderia sp.8B can not only accelerate weathering of biotite but also promote the formation of scaly and spherical clay minerals,which might be vermiculite and montmorillonite,respectively.The analyses of the formation processes of secondary minerals believed that vermiculite was formed via structure transformation process characterized by a successive model and that montmorillonite might be formed via recrystallization after biotite dissolution,i.e.a dissolution-precipitation model.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2011年第3期292-298,共7页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(40573057
40930738)
中国博士后科学基金资助项目(20060400946)
江苏省博士后科研基金资助项目(0601046B)
关键词
黑云母
伯克霍尔德菌
风化作用
蛭石
蒙脱石
biotite
Burkholderia sp.
weathering
vermiculite
montmorillonite
