CAJ | 학술논문

新疆巴里坤县七角井镇德哲塔勒德地区上石炭统奥尔吐组沉积相类型为扇三角洲相和滨海碎屑岩相。扇三角洲平原泥炭沼泽沉积和平原分流河道粗碎屑沉积组成扇三角洲平原亚相；水下分流河道和水下分流河道间沉积组成扇三角洲前缘亚相。主体是由碎屑岩组成不同规模的韵律层，发育平行层理、交错层理、较大型的楔状交错层理、水平层理。其中水平层理一般发育在静水地带，平行层理、交错层理则分别主要出现在以高流态、高水动力为特征的条件下，二者交互出现，反映地层沉积于海水进退较频繁的滨浅海地带。本组地层基本层序内部为由下至上粒度变细的特征，显示为海进过程。同时发现了大量化石，包括头足化石：尖形卡拉温菊石（Cravenoceras acu-tum Liang）；腕足化石：网格长身贝（Dictyoclostus sp.），在含碳细砂岩中发现了桶箍芦木化石（Calamites cf. schützeiformis Kidst. et Jongm）碎片，结合该组沉积岩成分成熟度和结构成熟度均较低的特征，岩石为近岸源区快速剥蚀、搬运、堆积形成的，所含植物化石碎片是沿途生长的植物异地埋藏形成的，说明本组沉积岩是在滨海区沉积形成的。
신강파리곤현칠각정진덕철탑륵덕지구상석탄통오이토조침적상류형위선삼각주상화빈해쇄설암상。선삼각주평원니탄소택침적화평원분류하도조쇄설침적조성선삼각주평원아상；수하분류하도화수하분류하도간침적조성선삼각주전연아상。주체시유쇄설암조성불동규모적운률층，발육평행층리、교착층리、교대형적설상교착층리、수평층리。기중수평층리일반발육재정수지대，평행층리、교착층리칙분별주요출현재이고류태、고수동력위특정적조건하，이자교호출현，반영지층침적우해수진퇴교빈번적빈천해지대。본조지층기본층서내부위유하지상립도변세적특정，현시위해진과정。동시발현료대양화석，포괄두족화석：첨형잡랍온국석（Cravenoceras acu-tum Liang）；완족화석：망격장신패（Dictyoclostus sp.），재함탄세사암중발현료통고호목화석（Calamites cf. schützeiformis Kidst. et Jongm）쇄편，결합해조침적암성분성숙도화결구성숙도균교저적특정，암석위근안원구쾌속박식、반운、퇴적형성적，소함식물화석쇄편시연도생장적식물이지매장형성적，설명본조침적암시재빈해구침적형성적。
Fan delta and littoral clastic rock facies have been recognized from the upper carboniferous Aoertu Forma-tion, QiJiaoJing Zhelandesayi of Qijiaojing town,Xinjiang ,Fan delta plain subfacies can be further divided into peat swamps deposition of Fan delta plain and coarse clastic fan delta plain distributary channel deposits;underwater distribu-tary channel and underwater distributary inter-channel deposits form fan delta front subfacies;parallel bedding, cross-bed-ding, larger wedge cross bedding and horizontal bedding exist in the clastic rock rhythm of different scale layer.Horizon-tal bedding generally develop in the static water area,parallel bedding and cross-bedding respectively appear in the high flow and high characteristics of hydrodynamic conditions,both for the interactive,this phenomenon reflect edimentary stratum the offshore area of seawater in a more frequently. The size of sediments become thinner from the bottom in ba-sic sequence within the group formation.This feature displays transgression process.At the same time,founding a lot of fossils,including:Cephalopod: Cravenoceras acutumLiang;brachiopod:Dictyoclostus sp. etc, the aloe vera plant fossil fragments was found in carbon fine sandstone with Structure of sedimentary rocks and lower maturity.The rock is formed offshore source area rapid erosion,handling,stacking.plant fossils(Calamites cf. schützeiformis Kidst. et Jongm) fragments formed for long-distance buried along the growth of plants.At the same time, it shows that this group of sedi-mentary rocks deposits in offshore area.