新疆地质
新疆地質
신강지질
XINJIANG GEOLOGY
2014年
2期
168-171
,共4页
霍进杰%祁明霞%任军民%帅维治
霍進傑%祁明霞%任軍民%帥維治
곽진걸%기명하%임군민%수유치
准噶尔盆地%下白垩统%风暴岩%沉积模式
準噶爾盆地%下白堊統%風暴巖%沉積模式
준갈이분지%하백성통%풍폭암%침적모식
Junggar basin%Lower Cretaceous%Tempestite%Sedimentary model
准噶尔盆地石西凸起地区下白垩统呼图壁河组呼一段存在湖相风暴岩。建立沉积模式,探讨风暴岩发育条件及意义。研究区风暴沉积是由于风暴浪作用于浅湖泥坪和滨岸沼泽,使沉积物重新搅起、打碎形成泥砾,再通过风暴流搬运到三角洲前缘或滨浅湖滩坝中,与未固结的砂质沉积而成。研究区典型风暴岩沉积构造丰富,完整的单层风暴沉积不发育,常见不完整风暴沉积和多次风暴作用形成的若干不完整风暴岩的叠置层。通过对岩心及沉积背景分析认为,研究区呼一段沉积时湖盆水动力较强,湖岸周围古地形平缓,湖盆水体较浅,具坡折带。有利砂体具相互叠置、厚度大、分布面积广特点。
準噶爾盆地石西凸起地區下白堊統呼圖壁河組呼一段存在湖相風暴巖。建立沉積模式,探討風暴巖髮育條件及意義。研究區風暴沉積是由于風暴浪作用于淺湖泥坪和濱岸沼澤,使沉積物重新攪起、打碎形成泥礫,再通過風暴流搬運到三角洲前緣或濱淺湖灘壩中,與未固結的砂質沉積而成。研究區典型風暴巖沉積構造豐富,完整的單層風暴沉積不髮育,常見不完整風暴沉積和多次風暴作用形成的若榦不完整風暴巖的疊置層。通過對巖心及沉積揹景分析認為,研究區呼一段沉積時湖盆水動力較彊,湖岸週圍古地形平緩,湖盆水體較淺,具坡摺帶。有利砂體具相互疊置、厚度大、分佈麵積廣特點。
준갈이분지석서철기지구하백성통호도벽하조호일단존재호상풍폭암。건립침적모식,탐토풍폭암발육조건급의의。연구구풍폭침적시유우풍폭랑작용우천호니평화빈안소택,사침적물중신교기、타쇄형성니력,재통과풍폭류반운도삼각주전연혹빈천호탄패중,여미고결적사질침적이성。연구구전형풍폭암침적구조봉부,완정적단층풍폭침적불발육,상견불완정풍폭침적화다차풍폭작용형성적약간불완정풍폭암적첩치층。통과대암심급침적배경분석인위,연구구호일단침적시호분수동력교강,호안주위고지형평완,호분수체교천,구파절대。유리사체구상호첩치、후도대、분포면적엄특점。
On the basis of the core observation, introduces the Shixi bulge area of Lower Cretaceous Hutubi River group a section of the storm rock, sedimentary model is established, and probes into the storm rocks development condi-tion and its significance.The storm rock is by storm waves in shallow lake mud flat and coastal marsh, the sediment to stir up, breaking the formation of boulder clay, and through the storm flow transported to the delta front or shore-shallow lake dam,together form the sediments and unconsolidated sand.The study area rich typical tempestite sedimentary struc-ture,single storm deposition complete not development, formed the common incomplete storm deposition and the storm effect of some incomplete storm rocks stacked layer.Through the analysis of the core and sedimentary background of the research area that call a sedimentary basin water power strong,lake surrounded by ancient flat terrain,the lake water is shallow,with slope belt.The favorable sand body has the characteristics of superimposition,big thickness,wide distribu-tion area.Therefore,the Cretaceous Shixi bulge area call found a section of storm rock exploration in this area and the sed-imentary facies recognition has important significance.