CAJ | 학술논문

南天山西段山峦叠嶂，沟壑深切，褶皱强烈，断裂纵横。构造演化与中生代以来新疆地区的强烈隆升以及其后的塔里木盆地大规模断陷密切相关，受典型的盆山耦合机制控制。从卷入褶皱作用的地层展布和区域构造变形特征分析，新疆地区在原塔里木地块的基础上，由于大规模地幔物质上涌，于中生代晚期发生强烈隆升，并在隆升的北西缘西南天山一带形成北东东向构造岩浆带。新生代以来，由于新疆隆起轴部强烈的热减薄作用，导致隆起中部发生大规模裂陷，并逐渐形成塔里木断陷盆地。与此同时，构造岩浆活动形成的南天山西段造山带与塔里木断陷盆地构成了较大的（地形）位势差，进而引起南天山西段由北西向南东拆离滑脱。第一期形成的区域性褶皱被改造成一系列倒转褶皱，往往表现出北西翼平缓，地层出露齐全，南东翼陡倾或倒转，甚至在某些背斜倒转翼形成较大规模的逆冲推覆构造，同时相伴产生多条北西向走滑断裂，以调节沿走向滑脱拆离幅度的不均匀性。因此，南天山西段，甚至整个新疆地区，中新生代的区域构造演化应从盆山耦合的视角分析其地球动力学过程。这也许是解开西南天山复杂变形历史的钥匙。
남천산서단산만첩장，구학심절，습추강렬，단렬종횡。구조연화여중생대이래신강지구적강렬륭승이급기후적탑리목분지대규모단함밀절상관，수전형적분산우합궤제공제。종권입습추작용적지층전포화구역구조변형특정분석，신강지구재원탑리목지괴적기출상，유우대규모지만물질상용，우중생대만기발생강렬륭승，병재륭승적북서연서남천산일대형성북동동향구조암장대。신생대이래，유우신강륭기축부강렬적열감박작용，도치륭기중부발생대규모렬함，병축점형성탑리목단함분지。여차동시，구조암장활동형성적남천산서단조산대여탑리목단함분지구성료교대적（지형）위세차，진이인기남천산서단유북서향남동탁리활탈。제일기형성적구역성습추피개조성일계렬도전습추，왕왕표현출북서익평완，지층출로제전，남동익두경혹도전，심지재모사배사도전익형성교대규모적역충추복구조，동시상반산생다조북서향주활단렬，이조절연주향활탈탁리폭도적불균균성。인차，남천산서단，심지정개신강지구，중신생대적구역구조연화응종분산우합적시각분석기지구동역학과정。저야허시해개서남천산복잡변형역사적약시。
Ravines deep, strong folding, fracture aspect of the western part in South Tianshan, Tectonic evolution of Mesozoic and the strong uplift in Xinjiang area, and the subsequent large-scale rift-subsidence of the Tarim Ba-sin are closely related, are under the control of a typical basin-range coupling mechanism. Analysis from the stratigraphic distribution of involved in folding and regional tectonic deformation feature, the Xinjiang area on the basis of the original the Tarim block, because of large-scale mantle upwelling, occurred uplifting in the late Mesozoic, and north western margin of western part in South Tianshan area formed strike NEE tectonic magmat-ic belt. Since the Cenozoic, strong thermal thinning effect of axis part in the Xinjiang uplift, leading to uplift oc-curred in the central part of large-scale rift, and gradually formed the Tarim basin. At the same time, tectonics and magmatic activities formed orogenic belt of western part in South Tianshan and the Tarim Basin constitute the larger(topography)potential difference, causing from the North West to South East decoupling of western part in South Tianshan. Regional fold formation for the first phase is transformed into a series of overturned fold, often show north west limb gently, strata are complete, the eastern limb steep or reversed nappe structure, even formed larger scale thrust-nappe structures in some anticline overturned limb, at the same time,produce a plurality of strike NW strike-slip fault, In order to regulate detachment inhomogeneity amplitude along strike. Therefore, western part of South Tianshan, and even the whole Xinjiang area, the regional tectonic evolution of the Mesozo-ic and Cenozoic analyses the geodynamic processes from the basin-mountain coupling. Perhaps this is to unravel key of complex deformation history of Southwest Tianshan mountain.