山东科技大学学报:自然科学版
山東科技大學學報:自然科學版
산동과기대학학보:자연과학판
Journal of Shandong Univ of Sci and Technol: Nat Sci
2011年
5期
59-65
,共7页
王改云%王英民%张雷%陆金波
王改雲%王英民%張雷%陸金波
왕개운%왕영민%장뢰%륙금파
沙雅隆起%卡普沙良群%层序地层%沉积相%沉积模式
沙雅隆起%卡普沙良群%層序地層%沉積相%沉積模式
사아륭기%잡보사량군%층서지층%침적상%침적모식
Shaya uplift%Kapushaliang group%sequence stratigraphy%sedimentary facies%sedimentary model
综合运用钻井、测井和地震资料,对塔里木盆地沙雅隆起白垩系卡普沙良群进行了层序地层及沉积相研究。沙雅隆起处于库车前陆盆地的前隆带和隆后坳陷,卡普沙良群对应于一幕逆冲构造活动,其内细分的3个层序(SQ1-SQ3)对应前陆盆地的不同演化阶段。SQ1处于逆冲构造活动的初始期,低位体系域占主导,前隆带中部剥蚀,其两侧斜坡发育来自该剥蚀区的扇三角洲、辫状河三角洲沉积,隆后坳陷则发育来自前隆带及盆地腹部的三角洲沉积;SQ2处于逆冲构造活动增强期,湖侵体系域相对发育,前隆带整体沉降至水下,以滨浅湖沉积为主,隆后坳陷则主要发育曲流河三角洲沉积;SQ3处于逆冲构造活动减弱期和停滞期,以高位体系域的相对发育为特征,前隆带和隆后坳陷成为一体,发育曲流河三角洲和辫状河三角洲沉积。
綜閤運用鑽井、測井和地震資料,對塔裏木盆地沙雅隆起白堊繫卡普沙良群進行瞭層序地層及沉積相研究。沙雅隆起處于庫車前陸盆地的前隆帶和隆後坳陷,卡普沙良群對應于一幕逆遲構造活動,其內細分的3箇層序(SQ1-SQ3)對應前陸盆地的不同縯化階段。SQ1處于逆遲構造活動的初始期,低位體繫域佔主導,前隆帶中部剝蝕,其兩側斜坡髮育來自該剝蝕區的扇三角洲、辮狀河三角洲沉積,隆後坳陷則髮育來自前隆帶及盆地腹部的三角洲沉積;SQ2處于逆遲構造活動增彊期,湖侵體繫域相對髮育,前隆帶整體沉降至水下,以濱淺湖沉積為主,隆後坳陷則主要髮育麯流河三角洲沉積;SQ3處于逆遲構造活動減弱期和停滯期,以高位體繫域的相對髮育為特徵,前隆帶和隆後坳陷成為一體,髮育麯流河三角洲和辮狀河三角洲沉積。
종합운용찬정、측정화지진자료,대탑리목분지사아륭기백성계잡보사량군진행료층서지층급침적상연구。사아륭기처우고차전륙분지적전륭대화륭후요함,잡보사량군대응우일막역충구조활동,기내세분적3개층서(SQ1-SQ3)대응전륙분지적불동연화계단。SQ1처우역충구조활동적초시기,저위체계역점주도,전륭대중부박식,기량측사파발육래자해박식구적선삼각주、변상하삼각주침적,륭후요함칙발육래자전륭대급분지복부적삼각주침적;SQ2처우역충구조활동증강기,호침체계역상대발육,전륭대정체침강지수하,이빈천호침적위주,륭후요함칙주요발육곡류하삼각주침적;SQ3처우역충구조활동감약기화정체기,이고위체계역적상대발육위특정,전륭대화륭후요함성위일체,발육곡류하삼각주화변상하삼각주침적。
Based on the drilling, logging and seismic data, the sequence stratigraphy and sedimentary facies of Kapush- aliang group of Cretaceous are studied in Shaya uplift of Tarim basin. Shaya uplift locates in the forebulge and back- age of Kuqa foreland basin, and Kapushaliang group responds to an episodic thrust structural activities of foreland basin. Kapushaliang group is divided into three strata sequences (SQ1-SQ3), which correspond to different structural evolution satges of foreland basin. SQ1 is in the intial stage of thrust activities,and the lowstand systems tract of SQ1 is dominant. The northern and southern slopes of forebulge develop fan delta and braided river delta, whose sediments come from the denuded middle forebulge. The facies of backage is delta, whose provenance is from the backage and the hinterland of Tarim basin. SQ2 is in the enhanced stage of thrust activities,and the trangressive systems tract of SQ2 is relatively developed. The whole forebulge is under water,and its facies is mainly shore-shallow lacustrine. The backage develops meandering river delta. SQ3 is in the extenuation and stagnate stages,and the highstand systems tract of SQ3 plays a dominant role. The forebulge and backage become one unit,and the facies are mainly comprised of meandering river delta and braided river delta.