青海察尔汗盐湖现代沉积中的变质变形规律

应用基础资料从温度、压力、物性及物源诸方面阐明了盐湖成岩作用,从湖水演化及析盐过程讨论了矿物沉积序列。以卤水、盐类矿物、原生矿物、细菌活动以及岩石分带为特征阐明了盐湖沉积中的变质和变形现象。以结构面的力学性质及变形规律、应力矿物及矿物变质规律表征了应力条件下盐湖沉积中不同物质组分的变质变形状态及演变规律。从盐湖沉积物的“生长型组构”阐明其受力变化以及与新构造运动相连系的变质变形机制。

METAMORPHISM AND DEFORMATION REGULARITY OF MODERN SEDIMENTS IN THE QARHAN SALT LAKE, QINHAI, CHINA

The salt lake diagenesis is discussed around temperature, pressure and physical character etc. in accordance with basic geological survey data. The mineral precipitation sequence is discussed concerning the evolution of lake water and the salt precipitation processes. The brine, salt minerals, primary minerals, bacteria activity and rock zonation were characterized in discussing the metamorphic and deformation phenomenon in the salt lake deposition. The mechanical property and deformation regularity in structure face, stress minerals and the mineral metamorphic regularity were used in determining the metamorphic deformation state and the evolution regularity of different materials in salt lake deposit under stressing conditions. "Growth fabric" of salt lake sedimental minerals is indication in talking its stressing changes and the metamorphic deformational mechanism in relation to the neotectonic movement.