1976年,我们替南京市化工局鉴定活性白土原料的过程中,发现六合小盘山和白土山有凹凸棒石粘土。此土不仅可作活性白土,而且是抗盐耐高温的钻探泥浆原料,因而很受石油、化工部门的重视。此外,这类粘土的发现也给南京地区第三纪地层的研究提供了新资料,说明当时沉积环境十分多样。为此,我们多次前往野外工作,并进行了系统的室内研究。 In 1976, we identified the active white clay for Nanjing Chemical Industry Bureau and found that there are attapulgite clay in Xiaoban Mountain and Clay Hill in Liuhe. This soil can not only be used as activated clay, but also salt and high temperature drilling mud raw materials, which is very much subject to the oil and chemical sectors. In addition, the discovery of such clays also provided new information for the study of Tertiary strata in Nanjing, indicating that the sedimentary environment was very diverse at that time. For this reason, we went to field work many times and conducted systematic indoor research.