中文摘要：

中亚造山带核心区（哈萨克斯坦山弯及翼部）发育新元古代晚期至早石炭世数条蛇绿混杂岩带,它们大多发育典型的海山岩石组合,即枕状玄武岩、火山角砾岩、礁灰岩、滑塌堆积岩、陆源碎屑岩等.结合其特有的构造特征,初步重建了中亚造山带核心区古海山火山地层格架.在地球化学上,构成古海山的火山岩主要为碱性玄武岩,TiO2含量高,富集轻稀土元素,无明显Nb,Ta,Ti负异常,具有典型洋岛玄武岩特征.Nd,Sr及Pb同位素组成显示岩浆源区有富集组分的参与并受到流体交代的影响.总体上与地幔柱有关的典型海山Louisville,Ontong Java及Hawaiian的玄武岩地球化学特征一致,但不发育高镁苦橄岩或科马提质玄武岩.中亚造山带核心区洋岛玄武岩的来源可能至少有两种：（1）海山在俯冲带被刮削保留在增生楔中;（2）直接来自地幔交代岩的部分熔融,也不排除循环洋壳部分熔融和陆源沉积物参与的可能.可见中亚造山带洋岛玄武岩的物质来源多并发生复杂的壳幔相互作用,这与现代大洋中地幔柱活动及海山的发展演化类似.

英文摘要：

The Central Asian Orogenic Belt（CAOB） is one of the largest orogens in the world and comprises island arcs,seamounts,accretionary wedges,oceanic plateaux and microcontinents accreted during the closure of the Paleo-Asian Ocean which is a long-lived ocean that existed for ~800 Ma from the late Mesoproterozoic to the Mesozoic.The CAOB extends from the Urals in the west,through Kazakhstan,northern China,and Mongolia to the eastern Russian coast.The core area,which extends from central Kazakhstan to Xinjiang（northwestern China）,are divided into three main geological domains.To the northeast,（1） the Altai range is composed by Early and Late Palaeozoic units that were accreted and docked to the Siberian margin and affected by high-grade metamorphism.To the south,the convergence between the Tarim Block and several micro continents such as Yili and Central Tianshan formed the（2） Palaeozoic Tianshan Orogen.The central and northwestern parts of Central Asia display a horseshoe shape that can be followed from North Tianshan to West Junggar around the Balkash Lake area.This megastructure is termed the（3） Kazakh Orocline.Until now so many studies focused on this area.However,the architecture and orogenic processes of the CAOB are still hotly debated.Remnants of oceanic island basalts（OIB） in association with ophiolites have been identified in several accretionary complexes in core area of CAOB.The nature of occurrence,geochemical characteristics of these OIBs and ophiolites has been taken to indicate extensive crust-mantle cycling magmatism.Therefore,in this paper,we provide an overview of the salient features of twelve OIB-hosting with age of Late Neoproterozoic to Early Carboniferous in core area of CAOB,and distinguish rock association of typical seamount from ophiolitic mélanges,including pillow basalt,volcanic breccia,reef limestone,olistostromes rocks,and terrestrial clastic rocks.Combined with unique structural features of seamount,we preliminary reconstruct stratigraphic framework of paleoseam