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第一节 长江下游火山岩铁矿基本特征 长江下游火山岩铁矿地质特征,在《宁芜玢岩铁矿》等有关著作中已有论述,可资参考。此类铁矿的基本特征可归纳如下:(1)与成矿有关的火山岩为以安山质为主的 一套火山岩组合,碱质偏高,属钙碱性岩石系列;(2)成矿作用主要发生于主岩浆旋回的晚期,如宁芜地区的大王山旋回,庐枞地区的塔猫尖旋回;(3)大、中型铁矿床主要产于庐枞—宁芜火山岩带内,外侧(繁昌—溧水火山岩带)成矿较差;(4)随含
Section I Basic characteristics of volcanic iron ore in the lower reaches of the Yangtze River The geological characteristics of the volcanic iron ore in the lower reaches of the Yangtze River have been discussed in the related works such as “Ningwu Dianyan Iron Mine” and are available for reference. The basic characteristics of such iron ore can be summarized as follows: (1) The ore-forming volcanic rocks are an andesite-based volcanic assemblage with high alkaline content and a series of calc-alkaline rocks; (2) mineralization (3) Large and medium-sized iron deposits are mainly produced in the Luzong-Ningwu volcanic belt, the outer side of which (Fanchang - Lishui volcanic belt) metallogenic poor; (4) with