青海铜峪沟铜矿床的热水沉积规律及形成环境——兼论热水作用与火山活动的关系

On the hydrothermal sedimentary laws and tectonic environment of Tongyugou deposit and the relationship between hydrothermal and volcanic activity

铜峪沟矿床已知的热水沉积物包括有 :层状硫化物矿体和岩石地球化学“异常” (原生晕 )、层矽卡岩和“矽卡岩化”、富硅质沉积物和“硅化”等 ,它们清楚地反映出热水沉积矿石和岩石、集中形式 (相 )和分散形式 (相 )的密切伴生以及热水沉积与正常沉积相互影响、相互参与等鲜为人知的热水沉积特征。热水沉积相与滑塌堆积、浊流沉积和火山沉积相共存不仅反映出热水作用发生的拉张裂陷构造环境和变化 ,而且反映了它们与火山活动的“兄弟”关系。

In Tongyugou deposit, hydrothermal sediments consist of bedded orebodies, wrigglites, siliceous rocks, geochemical “anomaly”of rocks,”skarnization” and “silification”, which clearly show the following hydrothermal sedimentary characteristics rarely known before: hydrothermal sedimentary rocks being closely associated with ores, concetrated type (bedded facies)of hydrothermal sediments coexisting with scattered type, and hydrothermal and marine sedimentation participating in or influecing each other Successive appearance of the hydrothermal sedimentary facies together with olistotrome facies, turbidite facies and volcano sedimentary facies not only indicates environments of spreading subsidence in which hydrothermal activity was generating and their evolution but also shows independent relationship between volcanic and hydrothermal activity