【摘要】 塔里木盆地西北缘的库尔干出露一套中生代含煤磨拉石建造 ,三叠系克拉玛依组底部砾岩中的硅岩砾石中发现大量放射虫化石 ,包括AlbaillellaparadoxaDeflandre,Albaillellasp.cf.AlbaillellaparadoxaDeflandre ,Albaillellasp.,Latentifistulasp.,Latentifistulidaegen.etsp.in det.,Follicucullussp .aff.FollicucullusbipartitusCaridroitetDeWever,Follicucullussp.和Spumellar iagen.etsp.indet.等。其中至少可以划分出两个化石组合 :一个是以Albaillellaparadoxa和Al baillellasp .cf.Albaillellaparadoxa为代表的早石炭世早期放射虫组合 ,另一个是以Follicucullussp .和Follicucullussp .aff.Follicucullusbipartitus为代表的中 晚二叠世放射虫化石组合。这说明库尔干地区的三叠系沉积有早石炭世早期和中 晚二叠世的硅岩物源 ,它们可能来自南天山碰撞造山带的蛇绿混杂岩。更多还原

【Abstract】 Kurgan is a frontier station at the western terminal of Chinese South Tianshan, NW margin of the Tarim Basin, where the Mesozoic coal bearing molasse formation well developed. 30 specimens of chert gravel were collected from the bottom of conglomerate of the Middle Upper Triassic Kelamayi Formation, from which 46 individual radiolarian fossils were found from 12 specimens. The fossils included Albaillella paradoxa Deflandre, Albaillella sp. cf. Albaillella paradoxa Deflandre, Albaillella sp., Latentifistula sp., Latentifistulidae gen. et sp. indet., Follicucullus sp. aff. Follicucullus bipartitus Caridroit et De Wever, Follicucullus sp. and Spumellaria gen. et sp. indet. Two radiolarian assemblages could be identified: one being early Early Carboniferous assemblage represented with Albaillella paradoxa and Albaillella sp. cf. Albaillella paradoxa, another being Middle Late Permian assemblage represented with Follicucullus sp. and Follicucullus sp. aff. Follicucullus bipartitus. This new discovery indicated the Carbono Permian chert provenance for Triassic deposits in Kurgan region, which might be from ophiolitic mélange of the Chinese South Tianshan orogenic belt.更多还原