摘要
The Devonian hydrotyermal sedimentation and mineralization are widespread and typical in Maizi、Kelang and Chonghuer basins of southern Altay margin, and have their respective signs in occurrence, fabric and geochemistry.Hydr)thermal sedimentary rocks mainly occur in the intermittent period between volcanic sub(?)ycles. They are thin-midium-bedded, lenticular and basically uniform to the occurrences of the overlying and underlying strata. The classification of the hydrothermal sedimentary rocks is proposed based on the mineral compositions. The detailed descriptions are given to the five types of hydrothermal sedimentary rocks: silicates, feldspar-rich rocks,
