西秦岭南亚带金-铜-铀成矿带中硅岩的海底喷流沉积特征研究

ON THE SUBMARIN EXHALATIVE SEDIMENTATION NATURE OF SILICALITES FROM THE GOLD-COPPER-URANIUM METALLOGENIC BELT IN THE SOUTH SUBZONE OF WESTERN QINLING

经过野外与室内工作,作者首次提出,西秦岭南亚带Au-Cu-U成矿带中的硅岩乃海底喷流作用的产物。岩石学、岩石化学、微量元素、稀土元素、氧和硅同位素特征等为硅岩的海底喷流沉积成因提供了令人信服的证据。

On the basis of field and laboratory studies, for the first time the authors propose that the silicalite which occured at the gold-copper-uranium metallogenic belt in the southern subzone of the western Qinling is a product of submarine exhalative sedimentation. The petrology and petrochemical characteristics of the trace element and rare earth element contents, silicon and oxygen isotopes, have provided convincing evidence to suggest the rock is of exhalative sedimentary origin.