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大阜山以赋存金红石矿床而闻名,主体为基性变质岩体,以榴闪岩为主。主要矿物石榴子石、角闪石、斜长石、金红石等主要经历了3个发育期次,不同期次具有不同的产状特征。根据野外地质、岩石学、元素地球化学研究分析,结合区域地质背景资料,认为含矿岩体原岩为辉长岩,具正铕异常,低温中高压环境下变质而成。受扬子板块向华北板块俯冲后快速折返的影响,含矿岩体经历了退变质过程,金红石矿床形成。因此,金红石矿床是变质原岩(辉长岩)在区域变质作用下,经构造演化等综合作用的结果。
Dafushan is famous for its rutile deposit and its main body is basic metamorphic rock, mainly libralickite. The main mineral garnet, amphibole, plagioclase, rutile and other major experienced three developmental stages, different periods have different producing characteristics. According to field geology, petrology and elemental geochemistry, combined with the regional geological background data, it is considered that the original rock of the ore-bearing rock mass is gabbro, with positive Eu anomaly and metamorphism under low and medium temperature and high pressure. Affected by the rapid reversion of the Yangtze plate to subduction of the North China plate, the ore-bearing rock undergoes retrogressive metamorphism and rutile deposits form. Therefore, the rutile deposit is the result of the combined effect of tectonic evolution and metamorphic protolith (gabbro) under regional metamorphism.