伊犁石炭纪裂谷的时空演化特征

通过对伊犁盆地石炭纪裂谷火山岩的地层学、岩石学、岩石地球化学等方面的论述，分析了裂谷的形成与演化，探讨了裂谷形成的区域动力学背景。认为裂谷期火山活动具幕式喷发的特点；随着时代的演替，裂谷由初始裂陷的察布查尔－伊什基里克一带扩展到整个伊犁地块；裂谷的形成主要与中天山南北两侧古洋壳的相向俯冲所导致的地幔物质上涌、中上地壳的背向伸展有关。

EVOLUTION OF SPACE AND TIME OF CARBONIFEROUS RIFT IN YILI AREA

Based on the discussion for the stratigraphy,petrology and geochemistry of the volcanics formed during the Carboniferous in the Yili basin,the formation and evolution of rift in Yili have been analysised In addition,the regional dynamic background of the rifting also have been researched The eruption of volcano was episodic during rift With the time,the rift occurred in the hold Yili block after the initial Chabuchaer Yishijili rifting The formation of rift was mainly controlled by the extension of middle and upper crust as well as the upwelling of materials derived from mantle,which resuled from the face to face subduction of ancient oceanic crust located at the south and north sides of central Tianshan