昆阳磷矿床中白泥层粘土岩及成因分析

RESEARCH ON GENESIS OF BAINICENG CLAYSTONE IN KUNYANG PHOSPHATE ORE DEPOSIT, YUNNAN PROVINCE

白泥层粘土岩是昆阳磷矿床中下寒武统渔户村组中谊村段富磷矿层的夹层。本文通过系统取样，对白泥层粘土岩进行了镜下鉴定、岩石化学分析和Ｘ射线衍射分析，确定白泥层粘土岩中主要粘土矿物为伊利石和伊利石／蒙脱石混层、含少量高岭石，非粘土矿物为石英、白云石、磷灰石等；同时对白泥层的形成环境及伊利石→蒙脱石的转化进行了探讨，为更加深入地研究昆阳磷矿的成因、成矿过程提供了最新的资料。

The claystone ofBainiceng is the horse stone of rich phosphate layers of Zhohgyicun Member,Yuhucun Group,lower Cambrian in Kunyang phosphate mine. Based on the systematic sampling,thin section observation,chemical analyses and X-ray diffraction of Bainiceng claystone sample3,the main clay minerals of the claystone are illite and mixed layer of illite/montmoril-lonite with a small quantily of kaolinite,the nonclay mineral are determind to be quartz,dolomite and agustite etc,The sedimentary environments of Bainiceng claystone and the transition from il-lite to montmorillonite are discussed in this paper too,So this paper can provide the newest data for the study of the genesis of k unyang phosphate ore deposit.