摘要
为了揭示塔里木盆地巴楚组层序地层样式和沉积演化规律,运用沉积学原理和层序地层学原理,通过对录井、测井和地震资料的分析,建立了巴楚组层序地层格架并对沉积演化规律进行了研究.结果表明:巴楚组发育了SQb1和SQb2两个层序,每个层序均可划分出海侵体系域(TST)和高位体系域(HST),各层序的地层分布范围逐层扩展超覆.沉积环境主要为浅海、临滨、前滨、后滨、滨岸沙丘及碳酸盐浅滩,从巴楚组沉积早期至晚期持续存在陆源碎屑与内源沉积物混积的沉积特征,总体具有由早期陆源碎屑沉积体系为主向晚期碳酸盐岩台地占优势的相带演化趋势.陆表海的古地貌和总体海侵的背景控制了巴楚组层序发育和沉积演化.
In order to reveal the sequence stratigraphic pattern and sedimentary evolution oI tsa- chu formation in Tarim basin based on the principle of sedimentary and sequence stratigraphy and analyses of mud logging, well logging and seismic data, the sequence stratigraphy frame of Bachu was established and the sedimentary evolution was studied. The results show that Bachu formation can be divided into two sequences ： SQbl and SQb2, both of which can be divided into transgression systems tract （TST） and highstand systems tract （HST）. Stratigraphic distribu- tion range of both sequences extends further layer by layer and individual sequence overlaps the former. The sedimentary environment includes mainly shallow sea, shoreface, foreshore, backshore, coastal dune and carbonate shoal. From early to late stage of Baehu formation depo- sition, terrigenous detritus mixed with authigenic deposition continuously. In the mass, sedi- mentary facies evolution tendency turned from major terrigenous detrital depositional system into major carbonate platform. The palaeogeomorphology of Epicontinental Sea and the back- ground of general transgression controlled the sequence development and sedimentary evolution of Bachu formation.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2012年第2期242-255,261,共15页
Journal of China University of Mining & Technology
基金
国家科技重大专项(2008ZX05001)
关键词
塔里木盆地
巴楚组
层序地层
沉积演化
沉积模式
Tarim basin
Bachu formation
sequence stratigraphy
sedimentary evolution
sed-imentary model
