GEOLOGICAL CHARACTERISTICS AND METALLOGENIC MODEL OF THE HUAZIYU MAGNESITE DEPOSIT IN LIAONING PROVINCE
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摘要: 铧子峪菱镁矿位于辽宁省海城境内，形成于古元古代，含矿建造为古元古代辽河群大石桥组三段含镁大理岩.通过对矿区内含镁大理岩中微量元素的分析和对大石桥期岩相古地理、古气候环境等的研究，总结出铧子峪菱镁矿的成矿模式：菱镁矿矿质来源于干热的湖盆地内含Mg质较高的水体，随着蒸发作用的不断进行，菱镁矿原始矿源层逐渐沉积形成，后期的区域变质作用使原始矿源层富集成矿，从而形成了该沉积变质型超大型矿床.Abstract: The Huaziyu magnesite deposit, situated in Haicheng, Liaoning Province, is formed in the Paleoproterozoic Era. The ore formation is the magnesian marble in the third member of Dashiqiao Formation, Liaohe Group. Through the analysis of trace elements in the magnesian marble and the research of lithofacies paleogeogarphy and paleoclimatic environment of Dashiqiao age, the metallogenic model of Huaziyu magnesite deposit is summarized as follows:The ore material was derived from the water containing rich magnesium in the dry and hot lagoon basin. With constant evaporation, the primary magnesite ore bed deposited gradually. The later regional metamorphism enriched the primary ore bed. The super large magnesite deposit of sedimentary metamorphosed type was then formed.
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