中国磷矿床成因分类

中国磷矿床按成矿物质来源,划分为内源、外源及次生三大类。按基本的成矿作用,将原生矿床分为岩浆、沉积、变质类型。岩浆矿床中,划分为超基性-碱性岩、超基性-碳酸岩、碱性岩、碳酸岩、超基性岩、伟晶岩等7个亚类,据总体的矿床特征划分为6个式(矿床式多以典型矿床命名)。变质矿床中划分绿岩带型变质混合岩和沉积变质3个亚类,6个式。海相沉积磷块岩矿床依据产出时代划分出震旦纪、寒武纪、泥盆纪3个亚类,14个式。次生矿床分为风化淋滤残积、洞穴堆积及鸟粪堆积3个亚类,3个式。

GENETIC CLASSIFICATION OF CHINA PHOSPHORUS DEPOSIT

The phosphorus deposits of China could be divided into three types,these are endogenesis deposit,allogenetic deposit and secondary deposit according to the ore forming source.Based on the basic ore-forming process,the primary deposits will be divided into magma deposits,sedimentary deposits and metamorphic deposits.The magmatic deposits of which have seven sub-types including ultrabasic-basic rocks,ultrabasic-carbonatite,basic rock,carbonatites,ultrabasic rocks,pegmatites and six styles(naming with typical deposits);and the metamorphic deposits have three sub-types including metamorphic migmatite of greenstone belt type and sedimentary metamorphic deposits and six styles,as well as the marine facies sedimentary phosphorite deposits have three sub-types,these are Sinian period,Cambian peiod,evonian and forteen styles according to the formation age.The secondary deposits have been divided into three sub-types of weathering leaching sedentary,cave deposit and bird dung accumulation and three styles.