| 引用本文: | 曹高社, 高立祥, 林玉祥, 俎新许, 王亚伟, 邢娜娜, 陈俊侠, 徐光明.晚白垩世西峡盆地和夏馆盆地古地震事件的发现及意义[J].沉积与特提斯地质,2010,(4):11-18.[点击复制] |
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| 摘要: |
| 以大量的野外工作为基础,辅以地球化学研究,确定了西峡盆地和夏馆盆地普遍存在着古地震事件的物质记录。同沉积期古地震事件主要表现为同沉积小断裂、同沉积角砾岩层等,且同沉积地震事件对于河流侵蚀作用的产生具有重要的影响;成岩期古地震事件主要表现为沿断裂上盘砾岩的"涂抹"和成岩期形成的方解石擦磨晶体,以及由断裂(裂隙)所围限的不同于周侧岩性的块体。古地震事件的研究不仅可以为恐龙蛋的埋藏作用提供信息,也可以为研究古地理和古构造背景提供信息。 |
| 关键词: 西峡盆地 夏馆盆地 晚白垩世 古地震 |
| DOI： |
| 附件 |
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| 基金项目:中石化重大前瞻性项目“华北西南部晚三叠世-新近纪岩相古地理研究与编图(CW800-07-2s-165-01)”;河南理工大学博士基金(648511)联合资助 |
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| Discovery and significance of the palaeoseismic events in the Late Cretaceous Xixia and Xiaguan Basin |
| CAO Gao-she, GAO Li-xiang, LIN Yu-xiang, Zu Xin-xu, WANG Ya-wei, XING Na-na, CHEN Jun-xia, XU Guang-ming |
(1. School of Resources and Environment Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China;
2. College of Geo-info Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, Shandong, China) |
| Abstract: |
| The palaeoseismic events in the Late Cretaceous Xixia and Xiaguan Basin may fall into two categories: synsedimentary and diagenetic.The synsedimentary palaeoseismic events led to the formation of synsedimentary faults and breccias horizons,and exercised an important effect on the erosion of rivers.The diagenetic palaeoseismic events are manifested in the "smear" phenomena of conglomerates along the hanging wall of faults,rubbing of calcite crystals,and fault-bounded blocks which are different from the surrounding rocks.The study in this paper may provide useful approaches not only to the burial of dinosaur eggs but also to palaeogeography and palaeotectonic settings. |
| Key words: Xixia Basin Xiaguan Basin Late Cretaceous palaeoseismic event |
