| 山东省胶莱盆地东北部下白垩统莱阳组震积岩特征及地质意义 |
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| 引用本文： | 周勇,纪友亮,万璐,潘春孚.山东省胶莱盆地东北部下白垩统莱阳组震积岩特征及地质意义[J].古地理学报,2011,13(5):517-528. |
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| 作者姓名： | 周勇 纪友亮 万璐 潘春孚 |
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| 作者单位： | 1.中国石油大学(北京)地球科学学院，北京102249;2.中国石油东方地球物理公司研究院，河北涿州072751 |
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| 基金项目： | 国家重点基础研究发展计划项目(编号:2006CB202302)与国家科技重大专项（编号：2008ZX05003-001）联合资助 |
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| 摘 要： | 胶莱盆地为中生代残留盆地,受郯庐断裂带、牟—即断裂带活动的影响,盆地南部、东北部地震活动强烈,发育一系列与地震作用有关的地震事件沉积构造.利用大量的岩心、野外露头资料,在胶莱盆地东北部下白垩统莱阳组砂泥质沉积物中可识别出两大类地震事件沉积构造:软沉积物变形构造(液化变形构造、拉伸变形构造、挤压变形构造)和硬岩层脆性变形...
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| 关 键 词： | 地震事件沉积构造 识别标志 地质意义 下白垩统莱阳组 胶莱盆地 |
| 收稿时间： | 2011-01-18 |
Characteristics and geologic significance of seismites in the Lower Cretaceous Laiyang Formation in northeastern Jiaolai Basin in Shandong Province |
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| Zhou Yong,Ji Youliang,Wan Lu,Pan Chunfu.Characteristics and geologic significance of seismites in the Lower Cretaceous Laiyang Formation in northeastern Jiaolai Basin in Shandong Province[J].Journal of Palaeogeography,2011,13(5):517-528. |
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| Authors: | Zhou Yong Ji Youliang Wan Lu Pan Chunfu |
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| Institution: | 1.College of Geosciences， China University of Petroleum(Beijing)，Beijing102249;2.Geophysical Research Institute，Bureau of Geophysical Prospecting，PetroChina，Zhuozhou072751，Hebei |
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| Abstract: | The Jiaolai Basin is a Mesozoic residual basin.The southern and northeastern parts of the basin were intensively affected by Tanlu and Mou-Ji Faults in the Cretaceous，and several types of deformational structures that are interpreted as seismites were formed.Based on core and outcrop observation，two types of sedimentary structures formed by seismic events were observed，including deformation structures of soft-sediments(liquefied deformation structure，stretch deformation structure，stress deformation structure)and hard rock.These sedimentary structures can be subdivided into 9 subclasses，and their genetic mechanisms were analyzed.The Mou-Ji Fault is a main fault which controlled the formation of the Jiaolai Basin，and stretched with NW-SE direction in Laiyang Formation depositional period，which caused frequent earthquake in the northeastern Jiaolai Basin.As a result，seismites were formed and were dominated by liquefied deformation of soft-sediments，which demonstrated the earthquake intensity was 5<Ms<8.A large number of micro-fractures in rocks were formed due to the earthquake，and the pores were connected by micro-fractures，which finally increased the permeability of rocks.The trigger mechanism of turbidite of the Shuinan Member can be explained as earthquake according to the discovery of seismites.Seismo-turbidites can be preserved as diagenetic traps because of dissolution caused by organic acids，which provides a new perspective and field for oil and gas exploration. |
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| Keywords: | sedimentary structures formed by seismic events identification marker geological significance Lower Cretaceous Laiyang Formation Jiaolai Basin |
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