Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation
The western Ordos Basin (WOB), situated in a tectonic transition zone in the North China Craton, acts as an excellent example for studying the Mesozoic intraplate sedimentation and deformation in Asia. In this study, U-Pb ages for 1203 detrital zircons of 14 sandstone samples collected from 11 secti...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-11-01
|
| Series: | Geoscience Frontiers |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987117301974 |
| _version_ | 1797717364215644160 |
|---|---|
| author | Pei Guo Chiyang Liu Jianqiang Wang Yu Deng Guangzhou Mao Wenqing Wang |
| author_facet | Pei Guo Chiyang Liu Jianqiang Wang Yu Deng Guangzhou Mao Wenqing Wang |
| author_sort | Pei Guo |
| collection | DOAJ |
| description | The western Ordos Basin (WOB), situated in a tectonic transition zone in the North China Craton, acts as an excellent example for studying the Mesozoic intraplate sedimentation and deformation in Asia. In this study, U-Pb ages for 1203 detrital zircons of 14 sandstone samples collected from 11 sections are presented to unravel the sediment source locations and paleogeographic environments of the Early–Middle Jurassic coal-bearing Yan'an Formation in the WOB. Data show that there are five prominent age groups in the detrital zircons of the Yan'an Formation, peaking at ca. 282 Ma, 426 Ma, 924 Ma, 1847 Ma, and 2468 Ma. Samples from the northern, middle, and southern parts of the WOB contain these five age categories in various proportions. In the northern region, the Yan'an Formation exclusively contains Early Permian detrital zircons with a single age group peaking at 282 Ma, matching well with the crystallizing ages of the widespread Early Permian granites in the Yinshan Belt to the north and the Alxa Block to the northwest. While in the southern region, the Yan'an Formation mainly contains three groups of detrital zircons, with age peaks at 213 Ma, 426 Ma, and 924 Ma. These zircon ages resemble those of the igneous rocks in the Qilian-Qinling Orogenic Belt to the south-southwest. Samples in the middle region, characterized by a mixture age spectrum with peaks at 282 Ma, 426 Ma, 924 Ma, 1847 Ma and 2468 Ma, are previously thought to have mixed derivations from surrounding ranges. However, by referring to the detrital-zircon age compositions of the pre-Jurassic sedimentary successions and combining with paleontological and petrographic analysis, we firstly propose that the sediments of the Yan'an Formation in the middle region were partly recycled from the Triassic and Paleozoic sedimentary strata in the WOB. The occurrence of recycled sedimentation suggests that the Late Triassic–Early Jurassic intraplate compressional deformation was very intense in the WOB, especially for regions in front of the Qilian Orogenic Belt. Keywords: Western Ordos Basin, Yan'an Formation, U-Pb geochronology, Recycled zircon, Intraplate deformation |
| first_indexed | 2024-03-12T08:36:13Z |
| format | Article |
| id | doaj.art-d83c2d1658fd42acbcd83a4a2da6633d |
| institution | Directory Open Access Journal |
| issn | 1674-9871 |
| language | English |
| last_indexed | 2024-03-12T08:36:13Z |
| publishDate | 2018-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geoscience Frontiers |
| spelling | doaj.art-d83c2d1658fd42acbcd83a4a2da6633d2023-09-02T17:17:39ZengElsevierGeoscience Frontiers1674-98712018-11-019617251743Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentationPei Guo0Chiyang Liu1Jianqiang Wang2Yu Deng3Guangzhou Mao4Wenqing Wang5State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China; Corresponding author.State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, Shaanxi, ChinaShandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, Shaanxi, ChinaThe western Ordos Basin (WOB), situated in a tectonic transition zone in the North China Craton, acts as an excellent example for studying the Mesozoic intraplate sedimentation and deformation in Asia. In this study, U-Pb ages for 1203 detrital zircons of 14 sandstone samples collected from 11 sections are presented to unravel the sediment source locations and paleogeographic environments of the Early–Middle Jurassic coal-bearing Yan'an Formation in the WOB. Data show that there are five prominent age groups in the detrital zircons of the Yan'an Formation, peaking at ca. 282 Ma, 426 Ma, 924 Ma, 1847 Ma, and 2468 Ma. Samples from the northern, middle, and southern parts of the WOB contain these five age categories in various proportions. In the northern region, the Yan'an Formation exclusively contains Early Permian detrital zircons with a single age group peaking at 282 Ma, matching well with the crystallizing ages of the widespread Early Permian granites in the Yinshan Belt to the north and the Alxa Block to the northwest. While in the southern region, the Yan'an Formation mainly contains three groups of detrital zircons, with age peaks at 213 Ma, 426 Ma, and 924 Ma. These zircon ages resemble those of the igneous rocks in the Qilian-Qinling Orogenic Belt to the south-southwest. Samples in the middle region, characterized by a mixture age spectrum with peaks at 282 Ma, 426 Ma, 924 Ma, 1847 Ma and 2468 Ma, are previously thought to have mixed derivations from surrounding ranges. However, by referring to the detrital-zircon age compositions of the pre-Jurassic sedimentary successions and combining with paleontological and petrographic analysis, we firstly propose that the sediments of the Yan'an Formation in the middle region were partly recycled from the Triassic and Paleozoic sedimentary strata in the WOB. The occurrence of recycled sedimentation suggests that the Late Triassic–Early Jurassic intraplate compressional deformation was very intense in the WOB, especially for regions in front of the Qilian Orogenic Belt. Keywords: Western Ordos Basin, Yan'an Formation, U-Pb geochronology, Recycled zircon, Intraplate deformationhttp://www.sciencedirect.com/science/article/pii/S1674987117301974 |
| spellingShingle | Pei Guo Chiyang Liu Jianqiang Wang Yu Deng Guangzhou Mao Wenqing Wang Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation Geoscience Frontiers |
| title | Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation |
| title_full | Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation |
| title_fullStr | Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation |
| title_full_unstemmed | Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation |
| title_short | Detrital-zircon geochronology of the Jurassic coal-bearing strata in the western Ordos Basin, North China: Evidences for multi-cycle sedimentation |
| title_sort | detrital zircon geochronology of the jurassic coal bearing strata in the western ordos basin north china evidences for multi cycle sedimentation |
| url | http://www.sciencedirect.com/science/article/pii/S1674987117301974 |
| work_keys_str_mv | AT peiguo detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation AT chiyangliu detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation AT jianqiangwang detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation AT yudeng detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation AT guangzhoumao detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation AT wenqingwang detritalzircongeochronologyofthejurassiccoalbearingstratainthewesternordosbasinnorthchinaevidencesformulticyclesedimentation |