摘要
长期以来有关新桥 (S Fe Cu)矿田的成因一直争论不休 ,如沉积 -改造型、层控 -矽卡岩型、海底喷流沉积型等。作者在综合分析该矿田的地质 -地球化学特征的基础上 ,认为新桥矿田具有二期成矿作用的特点。早期沉积成矿作用形成菱铁矿矿体和不具有工业意义的黄铁矿层。后期岩浆成矿作用形成层状、似层状块状硫化物型、热接触交代矽卡岩型和热液脉型等不同类型的硫化物矿体。
The genesis of Xinqiao iron deposit has been debated over the past 20 years. Several hypotheses, i.e. sedimentary-modified deposit, strata-bound skarn deposit, submarine exhalative-sedimentary deposit, have been postulated to account for the mineralization of the iron deposit. A model of the two-stage mineralization was put forward in this paper on the basis of the geologic and geochemical data of the Xinqiao iron deposit. The early mineralization is related to sedimentation, which resulted in the formation of the siderite ore-body and some pyrite ore-bodies. The later mineralization is associated with the Mesozoic magmatism and resulted in the formation of the stratiform and stratoid sulphides, the skarn-type orebodies and vein-type orebodies. These orebodies formed at the different mineralization stages have distinct geologic and geochemical characteristics.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2004年第2期187-193,共7页
Geotectonica et Metallogenia
基金
国家重点基础研究发展规划项目 (G19990 43 2 0 6)资助
关键词
新桥矿田
地质-地球化学特征
成矿作用
Xinqiao ore field
geologic and geochemical characteristics
mineralization
