中文摘要：

陆缘洋-陆转换或盆-山转换复杂多变,沉积作用活跃,但迄今认识有限。文中基于对陆块和造山带地层格架的梳理和建立,选择塔里木块体北缘与南天山之间两条较完整的泥盆—石炭系典型剖面开展盆地与沉积序列研究。泥盆纪—早石炭世维宪早期发育碱性玄武岩、放射虫硅质岩和浊积岩,而早石炭世维宪晚期—晚石炭世发育序列清晰的中厚层状碳酸盐岩、碎屑岩及其混合沉积组合,指示洋-陆转换已经发生。进一步重点分析了其中砂岩碎屑重矿物样品19个、碎屑锆石同位素年代学（U-Pb及Hf）样品12个,结合砂岩骨架组分特征综合解析了物源体系与构造演变机制。研究表明,泥盆纪—早石炭世维宪早期,塔里木块体北缘东部发育不稳定和差异显著的碎屑组合,并具有接近地层年龄的碎屑锆石,指示了由南向北相对近距离的源汇体系、活动陆缘和混杂沉积的特征;而西部砂岩呈现的较高的成分成熟度和来自塔里木陆块相当数量的锆石年代学特征,则具有被动大陆边缘沉积属性。早石炭世维宪晚期—晚石炭世,塔里木块体北缘东部成分成熟度增高,并出现了一定数量的来自塔里木陆块的碎屑锆石,以及相当部分390~460Ma锆石的εHf（t）显示特征的正值,具有主体再旋回混合造山带的物源构造属性、中-近距离源-汇体系和残留海沉积特征;而在塔里木块体北缘西部,较之前更加明显的较高砂岩成分成熟度和来自塔里木陆块的大量锆石年代学特征,说明具有远距离源汇体系特征,可能指示了更加广阔的残留洋或残留海沉积。这说明尽管南天山洋在早石炭世维宪期以后已经关闭,但直到晚石炭世仍未明显造山。塔里木块体北缘东、西部泥盆—石炭纪陆缘构造及相关盆地系统演化存在显著差异,是中亚地区陆缘裂解、多岛洋闭合、（微）陆块聚合复杂性的体现。

英文摘要：

Active and varied sedimentation frequently occurred in continental margin area during ocean-continent or basin-range transformation,a complex process with limited knowledge so far.Based on stratigraphic correlation between continents and orogens,two more complete Devonian-Carboniferous profiles,located between the northern margin of Tarim block and South Tianshan（TST belt）,are investigated and studied focusing on basin-filling and depositional sequences.Alkaline basalt,radiolarian chert and turbidite were developed from the Devonian to the Early Visean Phase of the Early Carboniferous.However,relatively shallow carbonate and terrigenous clastic rocks,with mixed sedimentary strata,distinctly deposited after the Late Visean Phase,indicating the occurrence of ocean-continent transformation.Further research focuses on 19 detrital heavy mineral samples and 12 detrital zircon（U-Pb and Hf）geochronological ones.Combined with sandstone framework grain components,the provenance and tectonic evolution implications are synthetically analyzed.From the Devonian to the Early Visean Phase of the Early Carboniferous,unstable and varied detrital assemblages,with some detrital zircons approximately similar to their strata age,occurred in the eastern section of TST belt,showing chaotic deposition and relatively short south-north source-sink（provenance-deposition）systems limited in active continental margin.However,more mature sandstone components,with a lot of detrital zircons bearing basement ages of Tarim continental block,were developed in the western section of TST belt,which is evident deposition attributes related to passive continental margin.From the Late Visean Phase of the Early Carboniferous to the Late Carboniferous,relatively higher mature sandstone components,with an amount of detrital zircons bearing the basement ages of Tarim continental block and some zircons with age of 390-460 Ma showing typical positiveεHf（t）values,deposited in the eastern section of TST belt.It mainly attributes to the complex o