秦岭造山带泥盆系热水沉积岩相的亚相和微相划分及特征

提出秦岭泥盆纪热水沉积岩相，划分了热水沉积岩相的亚相，微相，并总结其特征，按成岩成矿作用方式可划分为热水同生沉积亚相，热水同生交代亚相，热水浊流沉积亚相，热水液压致裂一隐爆亚相，热卤水渗滤交代亚相，热水（岩浆）流体隐爆－液压致裂亚相等6个亚相，沉积盆地分析中，它们是建立热水沉积盆地中地层格架的构造岩石地层单位组成单元，按地球化学动力学－岩石组合可划分为硅质岩亚相，重晶石岩亚相，钠长石岩亚相，铁镁碳酸盐岩亚相，方柱石－黑云母岩亚相，硫化物岩亚相等6个亚相，在热水沉积成矿盆地的地球化学分析与模拟中，它们是建立热水沉积体系及古热水成矿流体场地球化学类型的岩石地球化学地层层序单元及古热水成矿流体场地球化学类型单元。

ON CLASSIFICATIONS AND CHARACTERISTICS OF THE DEVONIAN HYDROTHERMAL SEDIMENTARY FACIES IN THE QINLLING OROGEN

The concept of hydrothermal sedimentary rock facies at the Devonian in the Qinling orogen have been initiated.Classifications of the subfacies and microfacies of the hydrothermal sedimentary facies and their characteristics have been approached in the paper.In terms of the patterns of hydrothermal rock-ore -forming, the subfacies of hydrothermal sedimentary facies can be classified into six kinds of the subfacies, that is, subfacies of hydrothermal synsedimentation, subfacies of hydrothermal synreplacement, subfacies of hydrothermal deposition in turbidity current,subfacies of hydrothermal fluid pressure-fracturing and explosion, subfacies of hot-brine vadose-replacement, subfacies of the explosion and fluid pressure-fracturing of hot fluid or fluid like magma fluids.These subfacies are units of tectonic petrology strata for establishment of stratigraphic frame in the analysis sedimentary basin.On the basis of geochemical dynamics and assoications of hydrothermal rocks,however,the subfacies of the hydrothermal sedimentary facies an be categoried into six kinds of subfacies, i.e., subfacies of siliceous rocks,subfacies of barite rocks, subfacies of albite rocks,subfacies of Fe-Mg-carbonate rocks,subfacies of scapolite rocks-biotite rocks,and subfacies of sulfide rocks.These subfacies are sequence units of rock-geochemistry strata and the geochomical units of paleo-hydrothermal field of ore-forming fluids for the systems of hytrothermal deposition and geochemical types of paleo-hydrothermal ore-forming field in the geochemical analysis and simulation of the hydrothemal depositional basin.