CAJ | 학술논문

西天山伊犁科古琴山地区出露较完整新元古代南华纪地层,自下而上为库鲁铁列克提组、吐拉苏组和别西巴斯套组,可划为两个冰期和一个间冰期沉积.下冰碛地层库鲁铁列克提组为一套冰碛砾岩、含砾凝灰岩组合.上冰碛地层别西巴斯套组岩性主要为冰碛砾岩、含砾凝灰质岩屑砂岩.两冰碛地层间间冰期沉积吐拉苏组主要为一套粉砂岩、细砂岩和凝灰岩沉积.通过岩相学分析,认为研究区南华系整体处于浅海陆棚环境,伴有冰川作用和火山活动.可划出冰川沉积相、海相和火山喷发相3种沉积相,其中冰川沉积相又可细划为基底冰碛岩亚相、冰前滨海亚相和冰筏海洋亚相.海相主要划为浅海碎屑沉积亚相和浅海碳酸盐岩亚相.
서천산이리과고금산지구출로교완정신원고대남화기지층,자하이상위고로철렬극제조、토랍소조화별서파사투조,가화위량개빙기화일개간빙기침적.하빙적지층고로철렬극제조위일투빙적력암、함력응회암조합.상빙적지층별서파사투조암성주요위빙적력암、함력응회질암설사암.량빙적지층간간빙기침적토랍소조주요위일투분사암、세사암화응회암침적.통과암상학분석,인위연구구남화계정체처우천해륙붕배경,반유빙천작용화화산활동.가화출빙천침적상、해상화화산분발상3충침적상,기중빙천침적상우가세화위기저빙적암아상、빙전빈해아상화빙벌해양아상.해상주요화위천해쇄설침적아상화천해탄산염암아상.
@@@@The well-preserved Neoproterozoic Nanhua stratum in the Keguqinshan area of Yili,Western Tianshan can be divided into Kulutieliekti Formation,Tulasu Formation and Biexibasitao Formation from bottom to top,which may repre-sent the deposition during two ice age events and an interglacial period. The lowest Kulutieliekti Formation is mainly composed of till conglomerates and pebble-bearing tuffs.Biexibasitao Formation mainly consists of till conglomerates and pebble-bearing tuffaceous lithic sandstones.The Tulasu Formation,as the interglacial deposit is mainly composed of siltstone and fine sandstone and tuffs.Based on the study of lithofacies paleogeography, the Nanhua system in the study area is considered to represent a neretic environment along with glaciations and volcanic activities.Therefore,it can be di-vided into three facies, i.e.glacial sedimentary facies,marine facies and volcanic eruption facies. Moreover,the glacial sed-imentary facies can be further divided into basal tillite subfacies, proglacial littoral subfacies and ice rafting neritic subfa-cies,while the marine facies can be divided into neritic detrital subfacies and neritic carbonate subfacies. In addition,com-pare the Nanhua system in the Kuluketage region with the Nanhua system in the study area of this article