库车再生前陆逆冲带的构造特征与成因

库车再生前陆逆冲带自北而南分为以下５个构造速：①北部边缘冲断－隐伏构造楔；②斯的克背斜带；③北部线性背斜带；④拜城背驮凹陷；⑤丘里塔格前缘带。全体形成前锋向南的冲断变形楔。各构造带中发育多种型式的断坪／断坡台阶状逆断层相关褶皱：断层传播褶皱滑脱褶皱、断层传播－滑脱混生褶皱、双重逆冲构造。在不同构造带发不同时代的生长地层，批示了各构造带不的构造变形年代。斯的克背斜带变形时期最早，始于中新世带的亚肯变

THE STRUCTURAL FEATURES AND ORIGIN OF THE KUQA REJUVENATION FORELAND THRUST BELT

Kuqa rejuvenation foreland thrust belt is devided into five structural zones from north to south as follows: 1. North margin thrusting cyptowedging zone, 2. Stike anticline zone, 3. North linear anticline zone, 4. Baichen pigyback depression, 5. Qiulitag frontier zone. They composed a southward thrust wedge which is about 50 km width and more than 200 km long. There are varied structural styles in the structural zones, i. e. fault bend fold, fault propagation fold, detachment fold, hybrid fault propagationdetachment fold and duplex thrust structure. There are different geological ages of growth strata in antichne limbs of different structural zones, showing the different emplacement ages of the structural zones. The Stike anticline zone was formed since Miocene (24. 5Ma). The North linear anticline zone was since middle Miocene (16.9Ma). The Dawanqi anticline in Baichen depression was since late Pliocene (3. 9Ma),and Yaken anticline in Qiulitak frontier zone was since early Pleistocene (1.8Ma). Therefore the deformation ages were younging southward from Miocene to Quaternary. The Kuqa rejuvenation foreland thrust belt is resulted from the remote tectonic effect in continent interior by the continent to continent collision of Indian to Tibetian continent.