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广东海南岛石碌矿区内的现知铁矿床,都属于多因复成矿床。但其基础矿床先后成于两个不同的大地构造发展阶段,分属于两种不同的大地构造类型,一为地槽型沉积变质矿床,一为地台型沉积矿床。前者的含矿地层为石碌群(相当于前人的“石碌群”下部,即SL1-6层),后者的含矿地层为石灰顶组(相当于原“石碌群”上部的“SL7层”,因其沉积建造不同,与SL6层之间又有不整合面分隔,故划分出来)。本文建议将“石碌式铁矿”一名专指以改变界限后的石碌群中的地槽型沉积变质铁矿为基础,后经地洼岩浆成矿作用改造迭加进一步富化而成的那种铁矿床,并从大地构造角度主要对该式矿床的形成条件和找矿方向问题试作探讨。
Shilu Mining Area, Hainan Island, Guangdong now known iron deposits, all belong to the multifold complex deposits. However, its basic deposit has become two different stages of tectonic development, belonging to two different types of tectonics, one for the geosyncline deposit metamorphic deposits, one for the platform sedimentary deposits. The former ore-bearing strata are Shishu Group (equivalent to the lower part of the Shishu Group, the former SL1-6 layer), and the latter ore-bearing strata are the lime-top group (corresponding to the “SL7 layer” in the upper part of the original “Shishu Group” The deposition of different construction, and SL6 layer there is an unconformity separation, it is divided). This paper suggests that “Shilu iron ore” refers to a type of sedimentary metamorphic iron ore in the Shilu Group after changing boundaries and is further enriched by the alteration of the magmatic mineralization in the Lawa area And from the perspective of tectonics, this paper mainly discusses the forming conditions of this deposit and the prospecting direction.