【摘要】 乌鲁木齐附近天山北缘喀拉扎背斜及其周缘的地层学分析表明,上中新统—上新统昌吉河群(N1-2ch)(相当于独山子组N1-2d)是喀拉扎山地区发育的生长地层,是喀拉扎背斜形成时的同构造沉积层序.这个结论表明,包括喀拉扎背斜在内的天山北缘第一排前陆冲断构造带形成于晚中新—上新世时期.更多还原

【Abstract】 The Kalazha anticline is a structure of the first foreland fold-thrust belt in north Tianshan, near Urumuqi. Growth strata recorded accurately initial emplacement ages of structure and detailed forming processes. Stratigraphy analysis of Kalazha anticline and its adjacent area indicates that the Changjihe group(N1-2ch) is a set of growth strata. The Chanagjihe group (N1-2ch), which is belongs to Pliocene, is equivalent to Dushanzi formation (N1-2d) in sedimentation time. This conclusion proved that the first fold-thrust belt of north Tianshan, including the Kalazha anticline, initiated in late Miocene to the earliest Pliocene, and formed after that time.更多还原