Types of Filling Sequences in the Continental Basins—— Examples from Mesozoic Basins, Western Liaoning Province
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摘要: 辽西地区在中生代发育了各种类型的陆相盆地，形成各种类型的地层。在按层序定义识别出不同盆地、不同时间的层序基础上，根据地质作用营力（如水、风和火成作用）、沉积介质与地质环境的特点将该区盆地充填的层序划分为湖盆层序、冲积层序、沙漠层序和火山层序等类型。对于不同类型的层序不仅其层序内部组成各异而且其层序控制因素也不尽相同。湖盆层序是指在湖盆地内由沉积作用形成的一类层序，表现为随湖水面的升降变化沉积体系或体系域在时空上的变化。一个完整发育的层序可以反映出一个水侵—水退的湖水变化周期。冲积层序是指在流域盆地中以冲积沉积作用为主而形成的一类层序，其不明显地受蓄水面的控制，但受潜水面的影响和地形及侵蚀基准面的控制。沙漠层序是指在风介质的条件下以沙漠沉积为主体的一类层序。火山层序是指由于火山作用导致的火山物质（包括沉积物）在盆地内的充填所形成的层序，通常发育在断陷盆地的早期阶段，由火山岩、火山碎屑岩、凝灰岩和沉积岩所构成。在辽西地区中生代盆地和各类型层序的控制因素中，构造因素是第一位的，表现在层序界因多为构造界面，如区域角度不整合面、平行不整合面以及构造转换面等。但各类型层序的具体控制因素是有差异的。Abstract: Some kinds of continental basins were formed during the Mesozoic in the western LiaoningProvince, in which the varied strata occurred. On the basis of recongnizing the sequences of differentbasins in different times and according to the sequence defination, the sequence types including lakebasin sequence, alluvial sequence, desert sequence and volcanic sequence were given through the analysisof geological agents ( such as water, wind and igneous process), sedimentary media and geological envi-ronments. The internal assemblages of different sequences are different and their controlling factors arenot the same. Lake basin sequence is formed through and sedimentation, showing the changes of thesedimentary systems or system tracts in time and space with the lake level variation. A whole sequencemay reflct the cycle of transgressive-regressive processes of the lake. Alluvial sequence developesthrough alluviation in a river basin. The storing water level does not control it directly, but it is influ-enced by groundwater level and controlled by topography and erosional basement level. Desert sequenceis a kind of sequence composed of desert sediments under condition of wind medium. Volcanic sequencecomposed of volcanic, pyroclastic, tuff and sedimentary rocks is formed by the filling of volcanic sub-stances(including sediments) in a basin during the time of volcanic activities. Of the controlling factorsof the sequences in the Mesozoic basins, the western Liaoning Province, the tectonics was the mostdominated. Most of the sdquence boundaries were tectonic surfaces, such as regional angular uncomfor-maties, paralell unconformaties and tectonic transform surfaces. However, the controlling factors a-mong different types of the sequences were different with each other.
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Key words:
- sequence type /
- continental basin /
- cntrolling facto
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[1] Mitchum R M, Vail P R and Thompson Ⅲ S. Seismio stratig-raphy and global ohanges of sea level part 2: the depositionalsequence as a baisic unit for stratigraphic analysis, in C E Pay-ton, ed, Seismicstrtig raphy-application to hydrocarbon explo-ration: AAPG M emoir, 1977, 26: 53 ～ 62. [2] Vail P R. Seismic Stratigraphy Interpretion Using SequenceStratig raphy. Paty 1: Seismic Sequence Stratigraphy Interpre-tion Pocedure. In: B rt, A W, ed, Atlas of Seismio Stratig ra-phy, V. 1: AAPG. Studies in Geology, 1987, 27: 1 ～ 10. [3] 李思田,李祯,林畅松等. 含煤盆地层序地层分析的几个基本问题. 煤田地质与勘探, 1993, 21( 4): 1 ～ 8. [4] 魏魁生,徐怀大. 华北典型萁状断陷盆地层序地层学模式及其与油气赋存关系. 地球科学,中国地质大学学报, 1993, 18( 2):139 ～ 149. [5] Legarreta L, Uliana M A and Larotonda C A, et al. Approachto nonmarine sequence stratigraphy-theo retical models and ex-amples from Argentine basins: Proceeding s of institut Francaisdu Petole, April 12- 14, 1992, Scarbo rough, England. PublIFP, Technip, 1993. [6] Xue L and Gallaway W E. Genetic sequence stratigraphicFramwork, Depositional Style and Hydrcarbon Occurrence ofthe Upper Cretaceous QYN Formations in the Songlial Lacus-trine basin, No rtheaatern China, AAPG, Bull, 1994, ( 77):1792 ～ 1908. [7] 王东坡,刘立. 大陆裂谷盆地层地层学的研究. 岩相古地理,1994, 14( 3): 1 ～ 9. [8] Liu Zhaojun, Cheng Rihui and Yi haiyong. Continental basinseismic sequence stratigraphy of the Kailu basin ( mesozoic,noth east China), Internastional symposium on deep and re-gional Geophysics and Geology, 1994, 46 ～ 47. [9] Shanley K W and McCabe P J. Perspectives on the sequencestratig raphy of Continental strta, AAPG Bull, 1994, 78( 4):544 ～ 568. [10] W right V P, Marrio tt S B. The sequence stratig raphy of flu-vial depositionalsystem: the role of floodplain sedimentsstoag e, Sedimentary Geology, 1993, 86: 203 ～ 210. [11] 程日辉. 辽西地区盆地演化— 构造与层序. 长春地质学院学报, 1995(增 1), 46 ～ 51. [12] 辽宁省地质矿产局. 辽宁省区域地质志. 北京: 地质出版社,1988, 382 ～ 384. [13] 张川波,何元良. 辽宁北票附近中侏罗世晚期的沙漠沉积.沉积学报, 1983, ( 1) 48～ 58. [14] 张少华,王国侦. 辽宁西部地区早白垩世义县火山旋回、亚旋回的划分与对比. 辽宁地质, 1985, 1: 84 ～ 91. [15] 王玉力,郑少林,张立君等. 辽宁西部中生代地层古生物. 北京: 地质出版社, 1989, 33 ～ 63. [16] 李思田. 断陷盆地分析和煤聚集规律. 北京: 地质出版社,1988, 171 ～ 172. [17] 许效松. 层序地层学研究进展. 岩相古地理, 1994, 14( 1): 34～ 39. [18] 陈荣坤. 层序地层学研究的一些进展和发展方向. 国外地质科技, 1993, 2 ～ 3. -
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