| 华北东部地区中生代盆地格局及演化过程探讨 |
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| 引用本文： | 吴智平,侯旭波,李伟.华北东部地区中生代盆地格局及演化过程探讨[J].大地构造与成矿学,2007,31(4):385-399. |
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| 作者姓名： | 吴智平 侯旭波 李伟 |
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| 作者单位： | 中国石油大学(华东)地球资源与信息学院,山东,东营,257061 |
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| 基金项目： | 全国油气资源战略选区项目(编号:XQ-2004-3) |
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| 摘 要： | 华北东部中生代盆地演化受控于欧亚构造域的板块挤压拼接和滨太平洋构造域"洋-陆"俯冲碰撞两大动力学背景,与兴蒙造山带、秦岭-大别造山带、太行山隆起及郯庐断裂带等陆内及周边造山带的形成、深大断裂发育演化以及深部动力等因素有着密切的联系。早-中三叠世华北地区基本继承了晚海西期以来的构造格局和沉积特点,地势北西高、东南低,为一南陡北缓、呈NWW向展布的大型内陆沉积盆地;晚三叠世扬子板块与华北板块剪刀式碰撞拼接,华北地区全面抬升,且西部抬升小,东部抬升幅度大,盆地范围向西部退缩,沉积范围缩小,东部地区地势较高,地貌复杂,以隆升剥蚀为主;早-中侏罗世华北东部处于由古亚洲构造域向滨太平洋构造域演化的过渡阶段,该时期太行山的形成将华北地区分割成东、西两个大盆,西部鄂尔多斯盆地依然为一个大型沉积盆地,东部渤海湾盆地区在早-中侏罗世的早期为一些小的山间沉积盆地群,主要表现为对印支期造成的大量NWW或近EW向逆冲断层及阔缓褶皱所产生的低洼地区的充填,晚期则表现为披覆式沉积;晚侏罗世-早白垩世太平洋板块活动取代了扬子板块、西伯利亚板块活动对华北地区构造演化的控制地位,中国东部进入大规模的裂陷或断陷盆地发育阶段,且出现了明显的分区性:在盐山-歧口-新港-兰考-聊城断裂系以东,由于受郯庐断裂带左旋走滑构造应力场的控制,主要发育NW或NWW向断陷盆地,而在该断裂系以西至太行山以东的地区,受左旋走滑影响较弱,主要发育NE和NNE向断陷盆地,在张家口-蓬莱走滑断裂带以北的下辽河坳陷区,盆地的长轴方向为NNE,属郯庐断裂带内部的走滑拉张盆地;晚白垩世郯庐断裂带以西的华北广大地区整体处于隆升剥蚀状态,仅在河南信阳盆地及冀中、临清、黄骅坳陷的少数低洼地区接受沉积,多以红色河湖相粗碎屑为主。研究华北东部中生代盆地演化对于该地区前第三系油气勘探具有指导意义。
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| 关 键 词： | 盆地格局及演化 中生代 华北东部 |
| 文章编号： | 1001-1552（2007）04-0385-15 |
| 修稿时间： | 2007-05-18 |
DISCUSSION ON MESOZOIC BASIN PATTERNS AND EVOLUTION IN THE EASTERN NORTH CHINA BLOCK |
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| WU Zhiping,HOU Xubo,LI Wei.DISCUSSION ON MESOZOIC BASIN PATTERNS AND EVOLUTION IN THE EASTERN NORTH CHINA BLOCK[J].Geotectonica et Metallogenia,2007,31(4):385-399. |
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| Authors: | WU Zhiping HOU Xubo LI Wei |
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| Institution: | Institute of Geo-resource and Information, China University of Petroleum, Dongying, Shandong 257061, China |
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| Abstract: | The Mesozoic basin evolution in the eastern North China Block was controlled by both the compression and amalgamation between the Eurasian plates and the Paleo-Pacific oceanic subduction and collision with the Eurasian Continent, and was closely related to the formation and evolution of deep faults (e.g., the Tancheng-Lujiang fault zone) and intracontinental and peripheral orogens including the Hinggan-Mongolian orogen, Qinling-Dabie orogen, Taihang uplift and so on. During early to middle Triassic, there possibly existed a NWW-trending large-scale sedimentary basin across the North China Block. This basin was inherited from the structural style and sedimentary characteristics of the Late Hercynian. The topography was high in the northwest and low in the southeast. The compressional amalgamation between the Yangtze and North China Blocks in a scissors-shape pattern during late Triassic, leading to the heterogeneous uplifting of the North China Block, i.e., the extent of uplift was less in the west than that in the east. The scope of basin was shrunk to the west, and the eastern part became a source provenance for erosion and denudation. Since early or middle Jurassic, the eastern part of North China Block was in the transition from the Paleo-Asian tectonic domain to the Paleo-Pacific tectonic domain. Formation of the Taihang Mountain divided the North Chima Block into two large-scale basins. In the west was the Ordos basin, whereas the eastern one comprised a series of small intermontane basins in the Bobai Bay area at the early stage. The structural styles included the Indosinian thrust faults and gentle folds. At the late stage, the sediments were widely dispersed. From Late Jurassic to Early Cretaceous, the influence caused by the Paleo-Pacific plate motion was predominant over the tectonic evolution of the North China Block, leading to formation of large-scale rifts or faulted basins. For instance, along the east of Yanshan-Qikou-Lankao-Liaocheng fault system there occurred a series of NW-and NWW-trending rift basins in response to the sinistral strike-slip stress field of the Tancheng-Lujiang fault zone. Between this fault zone and the Taihang Mountain there developed several NE-and NNE-trending rift basins due to the diminishing of the sinistral strike-slip stress field. Within the Tancheng-Lujiang fault zone, NNE-trending slip-extensional basin was formed as a result of extensional stress field, e.g., the Xialiaohe Depression. In late Cretaceous, the areas to the west of the Tancheng-Lujiang fault zone were uplifted and denuded, with deposition of red fluvial-lacustrine sediments in a few basins, such as the Xinyang basin, Jizhong Depression, Linqing Depression and Huanghua Depression. |
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| Keywords: | basin pattern and evolution Mesozoic the eastern North China Block |
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