滇东梨树坪-下包包磷矿集区成矿规律及与铅锌矿化关系

文章分析了梨树坪-下包包磷矿集区的成矿背景,总结出该区控矿因素包括寒武系渔户村组中上部地层以及古海凹盆地环境内碳酸盐相及碎屑岩、硅质岩相,且磷矿化受古洼陷海凹构造控制,而后期构造控矿作用微弱,但对磷元素的后期次生富集有较大的促进作用。认为成矿物质来源为含磷的陆源碎屑沉积风化物,并讨论了磷矿与铅锌矿化的时、空关系。

Metallogenic regularity of Lishuping-Xiabaobao phosphorus ore concentrated area in eastern Yunnan and its relation to Pb-Zn mineralization

This paper conducted analysis on the metallogenic background of Lishuping-Xiabaobao phosphorus ore concentrated area.It summarized that the ore-controlling factors included the middle and upper strata of Cambrian Yuhucun Formation as well as carbonate,clastic and siliceous facies in ancient ocean depressed ba-sin environment,and the phosphorous mineralization was controlled by the ancient ocean depressed struc-ture.The structural control over mineralization became weak in the later stage,but it still enhanced the secondary enrichment of phosphorous.The author believed that the ore-forming materials were phosphorous terrigenous clastic weathered sediments,and elaborated on the relationship between phosphorous mineraliza-tion and lead-zinc mineralization in terms of space and time.