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| 燕山承德地区晚侏罗世盆地充填记录及对盆缘构造作用的指示 | |
| 引用本文： | 刘少峰,张金芳,李忠,王清晨.燕山承德地区晚侏罗世盆地充填记录及对盆缘构造作用的指示[J].地学前缘,2004,11(3):245-254. |
| 作者姓名： | 刘少峰 张金芳 李忠 王清晨 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083 2. 中国科学院,软件研究所,北京,100080 3. 中国科学院,地质与地球物理研究所,北京,100029 |
| 基金项目： | 国家重点基础研究发展规划项目 (G1 9990 4330 3)，教育部留学回国人员科研启动基金资助项目 |
| 摘 要： | 承德地区滦平—承德和大杖子—新城子晚侏罗世沉积盆地带分别与丰宁—隆化逆冲带和尚义—平泉逆冲带相邻。盆地充填的土城子组在垂向上可划分出三个主要由辫状河冲积平原及辫状河三角洲沉积体系组成的盆地相。沉积物岩屑和砾石成分统计表明 ,滦平—承德盆地北缘岩屑岩性相在垂向上表现出三个基底变质岩岩屑向上增多的旋回 ,而滦平—承德盆地南缘及大杖子—新城子盆地则由碳酸盐岩和碎屑岩岩屑表现出三个向上增多的旋回。盆地沉积学特征表明 ,滦平—承德盆地南北边缘分别受控于尚义—平泉北缘和丰宁—隆化逆冲带 ,而大杖子—新城子盆地受控于尚义—平泉南缘逆冲带。如果承德断层发生了长距离逆冲推覆活动 ,其活动时间绝非土城子组同沉积期和之后 ,应该发生于髫髻山组沉积之后和土城子组沉积之前。盆地中三个岩屑岩性相旋回和盆地相旋回共同地反映了盆缘逆冲带三次抬升剥露过程 |
| 关 键 词： | 承德 土城子组 盆地充填 岩屑岩性相 构造作用 |
| 文章编号： | 1005-2321(2004)03-0245-10 |
| 修稿时间： | 2004年7月28日 |
Late Jurassic basin-fill record and its implication for basin margin tectonism, Chengde, Yanshan Mountains, North China |
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| LIU Shao-feng,ZHANG Jin-fang,LI Zhong,WANG Qing-chen.Late Jurassic basin-fill record and its implication for basin margin tectonism, Chengde, Yanshan Mountains, North China[J].Earth Science Frontiers,2004,11(3):245-254. | |
| Authors: | LIU Shao-feng ZHANG Jin-fang LI Zhong WANG Qing-chen |
| Institution: | LIU Shao-feng~1,ZHANG Jin-fang~2,LI Zhong~3,WANG Qing-chen~3 |
| Abstract: | The Late Jurassic Luanping-Chengde and Dazhangzi-Xinchengzi basins are linked with Fengning-Longhua and Shangyi-Pingquan thrust belts, respectively. The basin-fill of the Tuchengzi Formation is vertically divided into three basin-phases, which consist of braided channel plain and braided channel delta depositional systems. The statistics of the components of the sediment lithic fragments and gravels shows that there are three vertical cycles of metamorphite lithic fragment increase upwards in the northern Luanping-Chengde Basin, and three vertical cycles of carbonate and clasolite lithic fragment increase upwards in the southern Luanping-Chengde Basin and Dazhangzi-Xinchengzi Basin. Several conclusions have been made from basin sedimentology study. The southern and northern margins of the Luanping-Chengde Basin were controlled by the northern Shangyi-Pingquan thrust faults and Fengning-Longhua thrust faults, respectively, and the Dazhangzi-Xinchengzi Basin controlled by the southern Shangyi-Pingquan thrust fault. If a long distance thrust happened along the Chengde fault, the thrust might have not occurred at the syn-depositional stage of the Tuchengzi Formation or later, but should have occurred after the Tiaojishan Formation and before the Tuchengzi Formation. The three lithic petrofacies cycles and basin phases in the basins represent three uplift and unroofing processes along the basin marginal thrust belts. |
| Keywords: | Chengde Tuchengzi Formation basin-fill lithic petrofacies tectonism |
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