| 燕山褶断带中生代盆地变形-板内变形过程的记录--以下板城、承德-上板城、北台盆地为例 |
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| 关键词:Mesozoic basin intraplate deformation Xiabancheng basin Chengde—Shangbancheng basin Beitai basin northern Hebei Province |
| 基金项目:国土资源大调查项目(编号:200213000040、200013000168); 国家自然科学基金重点项目(编号:40132020) |
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| Mesozoic Basin Deformation of Yanshan Folded Fault Belt-Records of the Intraplate Deformation Process: A Case Study of Xiabancheng, Chengde-Shangbancheng and Beitai Basins |
| This paper discusses the evolution of Mesozoic intraplate orogenesis on the basis of sedimentary records and deformational analysis of three-generation Mesozoic basins in Xiabancheng and Chengde area of Yanshan folded fault belt. Three Mesozoic basins are from old to young Triassic—Middle Jurassic Xiabancheng basin, late Middle Jurassic—Late Jurassic Chengde—Shangbancheng basin and Early Cretaceous Beitai basin, with their sedimentary sequence composed of three regional Mesozoic structure layers. Xiabancheng basin is a reversed syncline with its sedimentary sequence composed of fluvial alluviation facies; Chengde—Shangbancheng basin is a dissymmetric syncline with its sedimentary sequence composed of volcanic alluviation facies; Beitai basin is a trapped syncline with its sedimentary sequence composed of volcanic sedimentary facies. The deformation of three-generation Mesozoic basins is inconsistent, respectively belonging to different tectonic layers of complicated deformation in their original places, and the older strata of complicated fold deformation are obviously covered by the new basin. Two regional angular unconformities separating the three tectonic layers are before 160 Ma and before 135 Ma in age, corresponding to“Unconformity A” and “Unconformity B” episodes of regional Yanshanian movement. |
| XU Gang,ZHAO Yue,GAO Rui,LI Qiu-sheng,HU Jian-min,LIU Xiao-wen,WU Hai,YANG Fu-quan,ZHANG Shuan-hong,GUAN Hua,ZHANG Ji-sheng,BAI Jin,KUANG Chao-yang,WANG Hai-yan.2006.Mesozoic Basin Deformation of Yanshan Folded Fault Belt-Records of the Intraplate Deformation Process: A Case Study of Xiabancheng, Chengde-Shangbancheng and Beitai Basins[J].Acta Geoscientica Sinica,27(1):1-12. |
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