| 山东省灵山岛早白垩世软沉积物变形构造特征* |
| |
| 引用本文： | 王安东,周瑶琪,闫华,王瑞,张振凯,王子阳.山东省灵山岛早白垩世软沉积物变形构造特征*[J].古地理学报,2013,15(5):717-728. |
| |
| 作者姓名： | 王安东 周瑶琪 闫华 王瑞 张振凯 王子阳 |
| |
| 作者单位： | 1.中国石油大学(华东)地球科学与技术学院, 山东青岛266580;2.中国石油化工股份有限公司胜利油田分公司地质科学研究院, 山东东营257015 |
| |
| 基金项目： | 国家自然科学基金项目(编号:40872095,41272123)资助 |
| |
| 摘 要： | 利用野外露头和镜下薄片等资料、地质统计等方法, 对山东省灵山岛老虎嘴剖面和船厂滑塌剖面软沉积物变形构造分布特征和形成期次进行了研究。船厂剖面发育滑塌褶皱、负载构造、阶梯断层、布丁构造、球—枕构造等典型的软沉积物变形构造；老虎嘴剖面发育层内褶皱、微阶梯断层、层内角砾岩等。根据形成时间、发育部位和形态特征, 将船厂剖面变形划分为滑塌前变形和滑塌中变形, 滑塌前变形又可以细分滑塌体下部变形和滑塌体内部变形。滑塌褶皱具有多级别、多尺度的特点；以厚岩层组成的滑塌褶皱为主, 尺寸为米级；岩层内部纹层形成的次级褶皱为辅, 尺寸为毫米级。滑塌过程中岩层不同部位应力不同, 伴生其他变形构造, 如拉张形成的布丁构造和挤压形成剪切褶皱等。滑塌前已经形成的负载构造等在滑塌过程中保持原来形态, 不因地层变形而变形。这些古地震触发形成的软沉积变形构造证明灵山岛在早白垩世古地震活动频繁。
|
| 关 键 词： | 山东省 灵山岛 早白垩世 滑塌褶皱 软沉积物变形 古地震 |
| 收稿时间： | 14 January 2013 |
Characteristics of soft-sediment deformation structures of the Early Cretaceous in Lingshan Island of Shandong Province |
| |
| Wang Andong;Zhou Yaoqi;Yan Hua;Wang Rui;Zhang Zhenkai;Wang Ziyang.Characteristics of soft-sediment deformation structures of the Early Cretaceous in Lingshan Island of Shandong Province[J].Journal of Palaeogeography,2013,15(5):717-728. |
| |
| Authors: | Wang Andong;Zhou Yaoqi;Yan Hua;Wang Rui;Zhang Zhenkai;Wang Ziyang |
| |
| Institution: | 1.School of Geosciences, China University of Petroleum (East China), Qingdao266580, Shandong;2.Geological Scientific Research Institute, Shengli Oilfield Company Ltd. , Sinopec, Dongying257015, Shandong |
| |
| Abstract: | To analyze the distribution characteristics and formation stages of soft-sediment deformation structures in slump folds in Lingshan Island, field outcrops, thin sections, geological statistics and some other methods was utilized to do comprehensive research on Laohuzui section and Chuanchang section. Giant slump folds, load structures, ladder faults, boudinages, ball-pillow structures and other deformation structures developed on the Chuanchang section. And intrafolial folds, micro-ladder faults and intra-formational breccias, distributed on Laohuzui section. According to the forming time, development position and morphological characteristics, deformations on the Chuanchang section were classified into pre-slump deformations and syn-slump deformations, and the pre-slump deformations were subdivided into infra-slump fold deformations and intra-slump fold deformations. Slump folds showed multi-order and multi-scale. The main slump folds were composed of thick layers of turbidite in meter-scale. The secondary slump folds were composed of laminaes in|milimeter-scale. There were different stresses in the different parts of rocks in the slumping process, with some other deformation structures concomitant, such as boudins formed by tensile stress and shear folds formed by extrusion stress. Load structures formed before the slump kept the original shapes in the slumping process, and didnt deform in the following rock deformation process. The study on soft-sediment deformation structures of Lingshan Island proved that the palaeoearthquake activities were frequent in the Early Cretaceous. |
| |
| Keywords: | Shandong Province Lingshan Island Early Cretaceous slump folds soft-sediment deformation structures palaeoearthquake |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
