岩矿测试2012，Vol.31Issue(5)：889-897,9.
矽卡岩型铁矿的铁质来源与迁移富集机理探讨
Study on Source, Transport and the Enrichment Mechanism of Iron in Iron Skarn Deposits
摘要
Abstract
Iron skarn deposits are of global concern, due to its complicated metallogenic mechanism. It is also one of the most important types of high-grade iron deposits in China. The source, transportation and enrichment mechanism of iron plays an important role in the study of iron skarn deposits, which are highly controversial at present. Based on the compilation of recent studies, the complex and polygenetic characteristics of iron skarn deposits are described in this paper, the transport and precipitation process of iron is summarized and a process flowchart has been constructed. Then the most possible iron sources in different kinds of iron skarn deposits are then. Above all, it was found that the deposits related to intermediate-acid intrusion and probably gained their iron from shallow intrusions. Many cases showed that most of the iron probably came from iron-rich strata nearby for those skarn deposits that related to acid intrusion. However, not all of this type of skarn deposits were hosted in iron-rich strata. Therefore, the possibility of deep iron source is also discussed. Combined with the theory of magmatic skarn and the cogenetic alkali-rich intrusion, it is proposed that the possible model is on the activation of deep source iron, transportation and enrichment process. The iron enriched ore pulp, derived by the assimilation ofdeep magma and calcic rocks, was transported to the aureole between shallow intrusion and carbonates. The ore pulp met the hydrothermal fluid to form iron enriched complex hydrothermal fluid, which precipitated the iron ores with the change of physical and chemical conditions in the aureole.关键词
铁质来源/迁移富集/矽卡岩型铁矿/矽卡岩Key words
iron source/ transport and enrichment/ iron skarn deposits/ skarns分类
天文与地球科学引用本文复制引用
陈艳,张招崇..矽卡岩型铁矿的铁质来源与迁移富集机理探讨[J].岩矿测试,2012,31(5):889-897,9.基金项目
国家重点基础研究发展计划(973计划)项目"我国富铁矿形成机制与预测研究"(2012CB416806) （973计划）
