澳大利亚西部铁矿成因探讨

摘要

Genesis of rich iron ore in West Australia is discussed. The authors concider that the Archean-Paleo-Proterozoic Si-Fe formation is typical Sedex and the primary tremendous thick iron-rich sedimentary layer is the main factor for formation of the rich iron ore in West Australia then the ore is further enriched by leaching at surface under special climatic and prolonged stable low hill conditions since Mesozoic Period. Mechanism of leaching enrichment at surface condition is also discussed.%文章探讨了澳大利亚西部富铁矿的成因,认为西澳太古代末至古元古代硅铁沉积建造是典型的海底热液喷气作用成因,原始巨厚富铁矿沉积层是西澳富铁矿形成的主要因素；中生代以来由于特殊的气候条件和长期稳定的低山丘陵环境,使原生富铁矿在地表条件下进一步富集,形成淋滤富集带型富铁矿；同时对地表氧化带淋滤富集作用机理进行了探讨.