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渤海西南海域寒武系崮山组软沉积物变形构造特征及地质意义
投稿时间:2017-10-11  修订日期:2018-09-11  点此下载全文
引用本文:叶涛,韦阿娟,高坤顺,孙哲,郭颖,李飞.2018.渤海西南海域寒武系崮山组软沉积物变形构造特征及地质意义[J].地质论评,64(6):1530-1540
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作者单位E-mail
叶涛 中海石油(中国)有限公司天津分公司,天津,300459 Tao_y2012@163.com 
韦阿娟 中海石油(中国)有限公司天津分公司,天津,300459  
高坤顺 中海石油(中国)有限公司天津分公司,天津,300459  
孙哲 中海石油(中国)有限公司天津分公司,天津,300459  
郭颖 中海石油(中国)有限公司天津分公司,天津,300459  
李飞 中海石油(中国)有限公司天津分公司,天津,300459  
基金项目:本文为国家油气重大专项“渤海海域勘探新领域及关键技术研究”(编号:2016ZX05024- 003)的成果。
中文摘要:首次在渤海海域下古生界寒武系崮山组碳酸盐岩中识别出了软沉积物变形构造。通过对钻井岩心的详细观察与描述,识别出了液化底劈构造、液化泥晶脉、液化角砾岩等软沉积物变形构造;根据研究区变形特征,建立了其垂向演化序列,该区软沉积物变形构造可分为两段,在剖面上自下而上均表现为液化泥晶脉、液化底劈带、液化角砾岩带、层内阶梯状断层带的渐变序列。研究认为,该区软沉积物变形构造系崮山沉积期古地震作用的产物,本次新发现的古地震事件可能与古郯庐断裂带的活动有关,是中朝地台裂解为华北板块与胶辽板块的响应。
中文关键词:渤海海域  下古生界;崮山组;软沉积物变形;古郯庐断裂带
 
The Characteristics of Soft- sediment Deformation Structures within the Lower Palaeozoic of Southwest Bohai Sea and Its Geological Implications
NameInstitution
YE TaoTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
WEI AjuanTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
GAO KunshunTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
SUN ZheTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
GUO YingTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
LI FeiTianjin branch of China National Offshore Oil Company Ltd., Tianjin, 300452
Abstract:Objectives: Soft- sediment deformation structures have been identified in Gushan Group of Cambrian of lower Palaeozoic in Bohai Sea area for the first time. Methods: Based on the detailed observation and description of drilling cores, typical sedimentary structures including liquefied diapir structure, liquefied carbonate volcano, liquefied micrite vein, liquefied breccias and step micro faults have been observed. Results: There are liquefied diapir structure——liquefied micrite vein belt, liquefied breccias zone and step micro faults belt from bottom to top in vertical profile of the both stages according to the brittle and plastic deformation characteristics. Conclusions: The seismites of this formation may be account for the activities of ancient Tanlu fault zone in Cambrian, and is also the response of the splitting of the Sino Korean plate which cracked into North China plate and Jiaoliao plate.
keywords:Bohai Sea area  Lower Palaeozoic  Gushan Group  soft- sediment deformation structures  Palaeo Tanlu fault zone
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