伊通地堑永一段大型湖底扇的沉积特点及其对构造事件的响应
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摘要
伊通地堑是我国东部中—新生代发育的走滑-伸展盆地。地震剖面解释和钻井岩芯观察表明,伊通地堑古近系永一段底部发育一个面积>400km2、厚达250m的大型湖底扇,作为永一段层序的低位扇体,其主要由细-中砂岩和少量砂砾岩组成,砂岩中含较多砂岩角砾、泥岩碎块或泥砾,卷曲纹理、液化变形、球状-枕状构造、微断层等准同生变形构造十分发育,体现了湖底扇主要为滑塌型水下泥石流沉积。在下伏奢岭组沉积之后,研究区遭受了构造反转挤压和抬升剥蚀;随后发生强烈的正断活动,并伴随火山喷发和地震活动,永一段湖底扇正是这些构造事件综合作用的结果,其发育预示着新一幕构造沉降的开始和盆地进入新的演化阶段。尽管扇体规模较大,但由于岩性结构混杂,储层物性极差,不利于油气藏的形成。
Yitong graben is a strike-slip and extensional basin in Meso-Cenozoic,the eastern China.After seismic profile explaining and well core observing,a large-scale sublacustrine fan complex with an area of 400 km2 and thickness of 250 m was identified at the bottom of Member Yong1,Paleogene of the graben.As the low-stand fan of three-order sequence Yong1,It was mainly composed of fine to middle-grained sandstone and a little gravel stone which bore many sandstone breccias,mudstone shivers or muddy gravels together with various pene-contemporaneous deformation structures such as convolute bedding,liquefied distortion,ball and pillow structure,microfault etc.,so it was determined to be dominantly subaqueous debris flow deposit due to slump.After underlying Sheling Formation had developed,the research area suffered reverse tectonic extrusion,denudation,and then violent normal-faulting accompanied with volcano breaking forth and earthquake activity.The fan at Member Yong1 was synthetically caused by above tectonic affairs,and it indicated that a new episode of tectonic subsidence occurred and that the garben came into a new evolution stage.Owing to the farraginous lithology composite and very poor reservoir capacity,this sublacustrine fan was not favorite to oil and gas accumulation although its size was very large.
Yitong graben is a strike-slip and extensional basin in Meso-Cenozoic,the eastern China.After seismic profile explaining and well core observing,a large-scale sublacustrine fan complex with an area of 400 km2 and thickness of 250 m was identified at the bottom of Member Yong1,Paleogene of the graben.As the low-stand fan of three-order sequence Yong1,It was mainly composed of fine to middle-grained sandstone and a little gravel stone which bore many sandstone breccias,mudstone shivers or muddy gravels together with various pene-contemporaneous deformation structures such as convolute bedding,liquefied distortion,ball and pillow structure,microfault etc.,so it was determined to be dominantly subaqueous debris flow deposit due to slump.After underlying Sheling Formation had developed,the research area suffered reverse tectonic extrusion,denudation,and then violent normal-faulting accompanied with volcano breaking forth and earthquake activity.The fan at Member Yong1 was synthetically caused by above tectonic affairs,and it indicated that a new episode of tectonic subsidence occurred and that the garben came into a new evolution stage.Owing to the farraginous lithology composite and very poor reservoir capacity,this sublacustrine fan was not favorite to oil and gas accumulation although its size was very large.
引文
陈洪洲,任锦章,徐亚勤.1996.依兰-伊通裂谷火山活动与地震活动.东北地震研究,12(1):8～18.
陈世悦,袁文芳,鄢继华.2003.济阳坳陷早第三纪震积岩的发现及其意义.地质科学,38(3):413～424.
杜远生,韩欣.2000.论震积作用和震积岩.地球科学进展,15(4):389～394.
林畅松,潘元林,肖建新,等.2000.“构造坡折带”——断陷盆地层序分析和油气预测的重要概念.地球科学—中国地质大学学报,25(3):260～266.
林畅松,郑和荣,任建业,等.2003.渤海湾盆地东营、沾化凹陷早第三纪同沉积断裂作用对沉积充填的控制.中国科学(D辑),33(11):1026～1036.
蔺连第,朗艳,金蕙,等.2005.二连盆地乌里雅斯太凹陷早白垩世湖底扇.石油勘探与开发,32(3):27～32.
陆永潮,任建业,李思田,等.1999.伊通地堑的沉积充填序列及其对转换-伸展过程的响应.石油实验地质,21(3):232～236.
马莉娟,何新贞,王淑玲,等.2000.东营凹陷沉降史分析与构造充填演化.石油地球物理勘探,35(6):796～794.
乔秀夫,宋天锐,高林志,等.1994.碳酸盐岩振动液化地震序列.地质学报,68(1):16～34.
任建业,陆永潮,李思田,等.1999.伊舒地堑构造演化的沉积充填响应.地质科学,34(2):196～203.
孙连浦,刘招君,李本才,等.2001.水下扇岩相特征及形成机制.世界地质,20(3):249～256.
童亨茂.2002.伊通地堑边界断裂的性质与演化.地质力学学报,8(1):35～42.
杨萍,杜远生,徐亚军.2006.黄骅坳陷古近纪地震事件沉积研究.地质学报,80(11):1711～1715.
袁静.2004.山东惠民凹陷古近纪震积岩特征及其地质意义.沉积学报,22(1):41～46.
张关龙,陈世悦,鄢继华,等.2006.三角洲前缘滑塌浊积体形成过程模拟.沉积学报,24(1):50～55.
赵密福,信荃麟,刘泽容.2001.惠民凹陷临南洼陷滑塌浊积岩的分布规律及其控制因素.石油实验地质,23(3):267～271.
郑照福,于恩影.2006.依兰-伊通地堑断裂北段地震活动的某些特征探讨.东北地震研究,22(1):26～31.
朱建伟,刘招君,魏志平,等.2002.吉林省伊通地堑莫里青断陷水下扇沉积特征.古地理学报,4(3):67～73.
Rodriguez-Pascua M A,Calvo J P,de Vicente G,et al.2000.Soft-sediment deformation structures interpreted as seismites inlacustrine sediments of the prebetic zone,SE Spain and thepotential use as indicators of earthquake magnitudes during thelate Miocene.Sedimentary Geology,135:117～135.
陈世悦,袁文芳,鄢继华.2003.济阳坳陷早第三纪震积岩的发现及其意义.地质科学,38(3):413～424.
杜远生,韩欣.2000.论震积作用和震积岩.地球科学进展,15(4):389～394.
林畅松,潘元林,肖建新,等.2000.“构造坡折带”——断陷盆地层序分析和油气预测的重要概念.地球科学—中国地质大学学报,25(3):260～266.
林畅松,郑和荣,任建业,等.2003.渤海湾盆地东营、沾化凹陷早第三纪同沉积断裂作用对沉积充填的控制.中国科学(D辑),33(11):1026～1036.
蔺连第,朗艳,金蕙,等.2005.二连盆地乌里雅斯太凹陷早白垩世湖底扇.石油勘探与开发,32(3):27～32.
陆永潮,任建业,李思田,等.1999.伊通地堑的沉积充填序列及其对转换-伸展过程的响应.石油实验地质,21(3):232～236.
马莉娟,何新贞,王淑玲,等.2000.东营凹陷沉降史分析与构造充填演化.石油地球物理勘探,35(6):796～794.
乔秀夫,宋天锐,高林志,等.1994.碳酸盐岩振动液化地震序列.地质学报,68(1):16～34.
任建业,陆永潮,李思田,等.1999.伊舒地堑构造演化的沉积充填响应.地质科学,34(2):196～203.
孙连浦,刘招君,李本才,等.2001.水下扇岩相特征及形成机制.世界地质,20(3):249～256.
童亨茂.2002.伊通地堑边界断裂的性质与演化.地质力学学报,8(1):35～42.
杨萍,杜远生,徐亚军.2006.黄骅坳陷古近纪地震事件沉积研究.地质学报,80(11):1711～1715.
袁静.2004.山东惠民凹陷古近纪震积岩特征及其地质意义.沉积学报,22(1):41～46.
张关龙,陈世悦,鄢继华,等.2006.三角洲前缘滑塌浊积体形成过程模拟.沉积学报,24(1):50～55.
赵密福,信荃麟,刘泽容.2001.惠民凹陷临南洼陷滑塌浊积岩的分布规律及其控制因素.石油实验地质,23(3):267～271.
郑照福,于恩影.2006.依兰-伊通地堑断裂北段地震活动的某些特征探讨.东北地震研究,22(1):26～31.
朱建伟,刘招君,魏志平,等.2002.吉林省伊通地堑莫里青断陷水下扇沉积特征.古地理学报,4(3):67～73.
Rodriguez-Pascua M A,Calvo J P,de Vicente G,et al.2000.Soft-sediment deformation structures interpreted as seismites inlacustrine sediments of the prebetic zone,SE Spain and thepotential use as indicators of earthquake magnitudes during thelate Miocene.Sedimentary Geology,135:117～135.
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