Segmentation characteristics and evolution of Xinanzhuang fault in Nanpu Sag, Bohai Bay Basin
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摘要: 以渤海湾盆地南堡凹陷西南庄边界断层为例,应用地震资料,结合构造图和地层厚度图,分析不同地质时期边界断层垂直位移沿走向变化,对边界断层分段生长与演化过程进行了研究,分析了这种过程对沉积的控制作用。西南庄断层在沙三段沉积期可分为东、中、西3个相对独立的断层,它们间呈侧列式分布,在断层段叠覆处发育转换斜坡;沙一段沉积时期,3个断层段连接并出现了统一趋势,同时高柳断层以北的断层段开始废弃。在东营组沉积末期各断层段连接形成统一断层,但仍表现出分段特征,在断层分段处形成横向褶皱,同时高柳断层以北的断层段废弃。横向褶皱和转换斜坡是下盘碎屑物质进入盆地的通道,是有利储层发育区。Abstract: The vertical displacement of boundary faults along strike during different geologic stages was studied using seismic data as well as tectonic and stratigraphic thickness maps for the Xinanzhuang Fault in the Nanpu Sag of the Bohai Bay Basin. The segmentation and evolution of boundary faults were studied and their controls on sediments were analyzed. During the deposition of the third member of Shahejie Formation, the Xinanzhuang Fault was divided into three individual fault segments from east to west, and relay ramps developed where fault segments overlapped. When the first member of Shahejie Formation was deposited, these individual fault segments were linked, and the fault segment to the north of Gaoliu Fault began to be abandoned. At the end of Dongying period, a unified fault was formed, yet still showed segmentation features. Some transverse folds appeared on hanging wall. The fault segment to the north of Gaoliu Fault was abandoned. Coarse sediments migrated into the basin through transverse folds and relay ramps, resulting in favorable reservoir development.
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Key words:
- relay ramp /
- transverse fold /
- segmentation /
- Xinanzhuang Fault /
- Nanpu Sag /
- Bohai Bay Basin
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[1] 陈发景,汪新文,陈昭年,等.伸展断陷盆地分析[M].北京:地质出版社,2004:45-47. Chen Fajing,Wang Xinwen,Chen Zhaonian,et al.Analysis of extensional fault basin[M].Beijing:Geological Publishing House,2004:45-47. [2] Cartwright J A,Trudgill B D,Mansfield C S.Fault growth by segment linkage:An explanation for scatter in maximum displacement and trace length data from the Canyonlands grabens of SE Utah[J].Journal of Structural Geology,1995,17(9):1319-1326. [3] Childs C,Watterson J,Walsh J J.Fault overlap zones within develo-ping normal fault systems[J].Journal of the Geological Society,1995,152(3):535-549. [4] Faulds J E,Varga R J.The role of accommodation zones and transfer zones in the regional segmentation of extended terranes//Faulds J E,Stewart J H.Accommodation zones and transfer zones:The regional segmentation of the basin and range province.Geological Society of America Special Publication,1998,323:1-45. [5] Frankowicz E,McClay K R.Extensional fault segmentation and linkages,Bonaparte Basin,outer North West Shelf,Australia[J].AAPG Bulletin,2010,94(7):977-1010. [6] Anders M H,Schlische R W.Overlapping faults,intrabasin highs,and the growth of normal faults[J].The Journal of Geology,1994,102(2):165-179. [7] Peacock D C P.Propagation,interaction and linkage in normal fault systems[J].Earth-Science Reviews,2002,58(1/2):121-142. [8] Dawers N H,Anders M H.Displacement–length scaling and fault linkage[J].Journal of Structural Geology,1995,17(5):607-614. [9] Morley C K,Nelson R A,Patton T L,et al.Transfer zones in the East African rift system and their relevance to hydrocarbon exploration in rifts[J].AAPG Bulletin,1990,74(8):1234-1253. [10] 孙思敏,彭仕宓,汪新文.东濮凹陷兰聊断层的分段特征及其石油地质意义[J].石油学报,2003,24(4):26-30. Sun Simin,Peng Shimi,Wang Xinwen.Segmentation characteristics of Lanliao Fault in Dongpu Depression[J].Acta Petrolei Sinica,2003,24(4):26-30. [11] 孙思敏,彭仕宓,汪新文,等.东濮凹陷长垣断层系中转换斜坡的特征与油气勘探[J].石油勘探与开发,2003,30(1):22-24. Sun Simin,Peng Shimi,Wang Xinwen,et al.The characteristic of relay ramps in fault system of the placanticline in Dongpu Sag and their relevance to hydrocarbon exploration[J].Petroleum Exploration and Development,2003,30(1):22-24. [12] Jackson C A L,Gawthorpe R L,Carr I D,et al. Normal faulting as a control on the stratigraphic development of shallow marine syn-rift sequences:The Nukhul and Lower Rudeis formations,Hammam Faraun fault block,Suez Rift,Egypt[J].Sedimento-logy,2005,52(2):313-338. [13] 张翠梅.渤海湾盆地南堡凹陷构造—沉积分析.北京:中国地质大学,2010:15-16. Zhang Cuimei.Tectono-sedimentary analysis of Nanpu Sag in the Bohaiwan Basin.Beijing:China University of Petro-leum,2010:15-16. [14] Schlische R W.Geometry and origin of fault-related folds in extensional settings[J].AAPG Bulletin,1995,79(11):1661-1678. [15] Peacock D C P,Sanderson D J.Geometry and development of relay ramps in normal fault systems[J].AAPG Bulletin,1994,78(2):147-165. [16] 张翠梅,刘晓峰,苏明.南堡凹陷老爷庙地区构造—沉积分析[J].地球科学(中国地质大学学报),2009,34(5):829-834. Zhang Cuimei,Liu Xiaofeng,Su Ming.Tectono-sedimentary analysis of Laoyemiao region in Nanpu Depression[J].Earth Science(Journal of China University of Geosciences),2009,34(5):829-834. [17] Schlische R W,Anders M H.Stratigraphic effects and tectonic implications of the growth of normal faults and extensional basins[J].GSA Special Papers,1996,303:183-203.
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