Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data
AbstractThe present topography of Tian Shan is related to the India-Asia collision, whereas the mechanisms for the topographic growth of Tian Shan remain at the center of debate partly due to the poorly constrained onset timing of the Cenozoic tectonic deformation. Our new apatite (U...
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| Format: | Article |
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GeoScienceWorld
2022-01-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8099539/610895/Initial-Cenozoic-Exhumation-of-the-Northern |
| _version_ | 1818156866316795904 |
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| author | Jingxing Yu Dewen Zheng Huiping Zhang Yizhou Wang Yuqi Hao Chaopeng Li |
| author_facet | Jingxing Yu Dewen Zheng Huiping Zhang Yizhou Wang Yuqi Hao Chaopeng Li |
| author_sort | Jingxing Yu |
| collection | DOAJ |
| description |
AbstractThe present topography of Tian Shan is related to the India-Asia collision, whereas the mechanisms for the topographic growth of Tian Shan remain at the center of debate partly due to the poorly constrained onset timing of the Cenozoic tectonic deformation. Our new apatite (U-Th)/He (AHe) data in the northern Chinese Tian Shan suggest that rapid cooling commenced at 20.2±4.9 Ma along the northern margin, which is consistent with published fission-track data from the same area and confirms that the youngest component of fission-track has been totally annealed. Moreover, AHe data from the interior mountain suggest that enhanced cooling began at 28.0±2.3 Ma, which is slightly older than that from the northern edge of the mountain. Although thermochronological data suggest that both the interior and northern margin of the northern Chinese Tian Shan have undergone rapid cooling since the late Oligocene-early Miocene, well preservation of relict low-relief surfaces along the northern rim of the northern Chinese Tian Shan and published thermochronological data indicate that the northern Chinese Tian Shan may have experienced differential exhumation in the Cenozoic. Combining the thermochronological and geomorphological evidence, we propose a progressive northward growth model for the northern Chinese Tian Shan. During the late Oligocene and early Miocene, compressive deformation derived from the India-Asia collision have arrived at the northern Tian Shan to reactivate both the interior mountain and its northern margin, while intense exhumation was concentrated in the interior mountain range. Then, deformation extended northward into the foreland basin that may be initiated in the middle-late Miocene. |
| first_indexed | 2024-12-11T15:05:06Z |
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| id | doaj.art-e3ed4847a48c48a5b3f338bddd2b85be |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-12-11T15:05:06Z |
| publishDate | 2022-01-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-e3ed4847a48c48a5b3f338bddd2b85be2022-12-22T01:00:58ZengGeoScienceWorldLithosphere1941-82641947-42532022-01-012022110.2113/2022/8099539Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological DataJingxing Yu0http://orcid.org/0000-0002-1887-8618Dewen Zheng1Huiping Zhang2Yizhou Wang3Yuqi Hao4Chaopeng Li5State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing China cea.gov.cnState Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China cas.cnState Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing China cea.gov.cnState Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing China cea.gov.cnState Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing China cea.gov.cnState Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing China cea.gov.cn AbstractThe present topography of Tian Shan is related to the India-Asia collision, whereas the mechanisms for the topographic growth of Tian Shan remain at the center of debate partly due to the poorly constrained onset timing of the Cenozoic tectonic deformation. Our new apatite (U-Th)/He (AHe) data in the northern Chinese Tian Shan suggest that rapid cooling commenced at 20.2±4.9 Ma along the northern margin, which is consistent with published fission-track data from the same area and confirms that the youngest component of fission-track has been totally annealed. Moreover, AHe data from the interior mountain suggest that enhanced cooling began at 28.0±2.3 Ma, which is slightly older than that from the northern edge of the mountain. Although thermochronological data suggest that both the interior and northern margin of the northern Chinese Tian Shan have undergone rapid cooling since the late Oligocene-early Miocene, well preservation of relict low-relief surfaces along the northern rim of the northern Chinese Tian Shan and published thermochronological data indicate that the northern Chinese Tian Shan may have experienced differential exhumation in the Cenozoic. Combining the thermochronological and geomorphological evidence, we propose a progressive northward growth model for the northern Chinese Tian Shan. During the late Oligocene and early Miocene, compressive deformation derived from the India-Asia collision have arrived at the northern Tian Shan to reactivate both the interior mountain and its northern margin, while intense exhumation was concentrated in the interior mountain range. Then, deformation extended northward into the foreland basin that may be initiated in the middle-late Miocene.https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8099539/610895/Initial-Cenozoic-Exhumation-of-the-Northern |
| spellingShingle | Jingxing Yu Dewen Zheng Huiping Zhang Yizhou Wang Yuqi Hao Chaopeng Li Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data Lithosphere |
| title | Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data |
| title_full | Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data |
| title_fullStr | Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data |
| title_full_unstemmed | Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data |
| title_short | Initial Cenozoic Exhumation of the Northern Chinese Tian Shan Deduced from Apatite (U-Th)/He Thermochronological Data |
| title_sort | initial cenozoic exhumation of the northern chinese tian shan deduced from apatite u th he thermochronological data |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8099539/610895/Initial-Cenozoic-Exhumation-of-the-Northern |
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