CAJ | 학술논문

北天山西段果子沟地区晚前寒武纪地层由下到上分为喀英迪组、塔尔恰特组和塔里萨伊组。喀英迪组和塔尔恰特组为间冰期沉积，塔里萨伊组为冰期沉积。喀英迪组主要由泥质粉砂岩、粉砂质泥岩、岩屑粗砂岩和长石岩屑砂岩组成，平行层理、水平纹层、脉状层理、透镜状层理及槽状交错层理等沉积构造发育，为海相沉积，可划分为滨海亚相（包括混合坪微相和沙坪微相）和浅海陆棚亚相（包括正常浅海微相和浅海风暴沉积微相）；塔尔恰特组主要由泥质粉砂岩、粉砂质泥岩组成，泥质含量较高，大量发育水平纹层，具3个由深变浅的沉积序列，为浅海亚相碎屑沉积；塔里萨伊组为冰期沉积的冰碛岩，划分出基底冰碛亚相、冰前滨海亚相以及冰筏海洋亚相。通过沉积类型、沉积序列、沉积相划分以及与新疆库鲁克塔格地区地层对比等方面的研究，并结合前人研究结果，认为该套地层不应该属于震旦系，而应归属于南华系，并认为该区喀英迪组和塔尔恰特组可以与库鲁克塔格地区南华系中统的黄羊沟组对比，塔里萨伊组可以与库鲁克塔格地区南华系上统的特瑞爱肯组对比。此外，还根据南华系岩石学特征对伊犁地区是否存在古陆进行探讨。
북천산서단과자구지구만전한무기지층유하도상분위객영적조、탑이흡특조화탑리살이조。객영적조화탑이흡특조위간빙기침적，탑리살이조위빙기침적。객영적조주요유니질분사암、분사질니암、암설조사암화장석암설사암조성，평행층리、수평문층、맥상층리、투경상층리급조상교착층리등침적구조발육，위해상침적，가화분위빈해아상（포괄혼합평미상화사평미상）화천해륙붕아상（포괄정상천해미상화천해풍폭침적미상）；탑이흡특조주요유니질분사암、분사질니암조성，니질함량교고，대량발육수평문층，구3개유심변천적침적서렬，위천해아상쇄설침적；탑리살이조위빙기침적적빙적암，화분출기저빙적아상、빙전빈해아상이급빙벌해양아상。통과침적류형、침적서렬、침적상화분이급여신강고로극탑격지구지층대비등방면적연구，병결합전인연구결과，인위해투지층불응해속우진단계，이응귀속우남화계，병인위해구객영적조화탑이흡특조가이여고로극탑격지구남화계중통적황양구조대비，탑리살이조가이여고로극탑격지구남화계상통적특서애긍조대비。차외，환근거남화계암석학특정대이리지구시부존재고륙진행탐토。
Guozigou in Yili of Xinjiang is located at the west margin of north Tianshan.The Precambrian strata in Guozigou are exposed relatively completely,which can be subdivided into Kayingdi Formation,Tarqiate For-mation and Talisayi Formation from bottom to top.Kayingdi Formation and Tarqiate Formation are interglacial deposits,and Talisayi Formation is a glacial deposit.Kayingdi Formation mainly consists of argillaceous silt-stone,silty mudstone, lithic sandstone and feldsarenite, in which sedimentary structures are developed, including parallel bedding,horizontally laminated bed,flaser bedding,sand lens and trough cross stratifica-tion.Kayingdi Formation can be subdivided into littoral subfacies (mixed flat microfacies and sand flat microfa-cies)and neritic shelf subfacies (normal neritic microfacies and storm deposit microfacies).Tarqiate Formation consists of argillaceous siltstone and silty mudstone with high shale content,in which a great quantity of hori-zontally laminated beds are developed,and this formation is a shallow-marine detrital deposit with three sedi-mentary sequences from deep to shallow.Talisayi Formation is a tillite deposit and can be subdivided into basal till subfacies,proglacial littoral subfacies and typical ice rafting-marine subfacies.According to sedimentation type,depositional combination,sedimentary facies and stratigraphic correlation with Quruqtagh area in Xin-jiang,and combined with previous research results,it is inferred that these strata belong to Nanhua System. Meanwhile,Kayingdi Formation and Tarqiate Formation can be correlated with Huangyanggou Formation in Quruqtagh area,and Talisayi Formation can be correlated with Teruiaiken Formation.The existence of the ancient land in the study area is also discussed by analysis of Nanhua System petrology,and the evidence is pro-vided in the end.