Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup
Geodynamic drivers for the supercontinent cycle are generally attributed to either top-down (subduction-related) or bottom-up (mantle-related) processes. Compiled geochemical data and U–Pb ages and Hf isotopic signatures for magmatic and detrital zircons from the Tarim Craton reveal a distinct chang...
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Elsevier
2021-01-01
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| Series: | Geoscience Frontiers |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987120300852 |
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| author | Guanghui Wu Shuai Yang Wei Liu R. Damian Nance Xin Chen Zecheng Wang Yang Xiao |
| author_facet | Guanghui Wu Shuai Yang Wei Liu R. Damian Nance Xin Chen Zecheng Wang Yang Xiao |
| author_sort | Guanghui Wu |
| collection | DOAJ |
| description | Geodynamic drivers for the supercontinent cycle are generally attributed to either top-down (subduction-related) or bottom-up (mantle-related) processes. Compiled geochemical data and U–Pb ages and Hf isotopic signatures for magmatic and detrital zircons from the Tarim Craton reveal a distinct change in subduction style during the Neoproterozoic. The subduction cycle is recorded in increasing and decreasing intensity of subduction-related magmatic rocks and time-equivalent sedimentary successions, and converse trends of εHf(t) values and corresponding changes in crustal incubation time. These trends are consistent with a switch from advancing to retreating subduction. The switch likely occurred at ca. 760 Ma when zircon εHf(t) values increase and crustal incubation times decrease following a transitional shift between 800 Ma and 760 Ma. A switch at this time is consistent with Rodinia breakup and may have resulted in the late Neoproterozoic Tarim rift basin. The long-lived (ca. 500 Ma) subduction recorded in the Tarim Craton suggests the predominance of a top-down process for Rodinia breakup on this part of its margin. |
| first_indexed | 2024-03-12T05:58:54Z |
| format | Article |
| id | doaj.art-ba28d6539e7941b1954bcaf43248fd6d |
| institution | Directory Open Access Journal |
| issn | 1674-9871 |
| language | English |
| last_indexed | 2024-03-12T05:58:54Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geoscience Frontiers |
| spelling | doaj.art-ba28d6539e7941b1954bcaf43248fd6d2023-09-03T04:22:37ZengElsevierGeoscience Frontiers1674-98712021-01-01121161171Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakupGuanghui Wu0Shuai Yang1Wei Liu2R. Damian Nance3Xin Chen4Zecheng Wang5Yang Xiao6School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China; Southwest Petroleum University, Division of Key Laboratory of Carbonate Reservoirs, CNPC, Chengdu 610500, China; Corresponding author. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China.School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaDepartment of Geological Sciences, 316 Clippinger Laboratories, Ohio University, Athens, OH 45701, USAPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaDepartment of Geological Sciences, 316 Clippinger Laboratories, Ohio University, Athens, OH 45701, USASchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaGeodynamic drivers for the supercontinent cycle are generally attributed to either top-down (subduction-related) or bottom-up (mantle-related) processes. Compiled geochemical data and U–Pb ages and Hf isotopic signatures for magmatic and detrital zircons from the Tarim Craton reveal a distinct change in subduction style during the Neoproterozoic. The subduction cycle is recorded in increasing and decreasing intensity of subduction-related magmatic rocks and time-equivalent sedimentary successions, and converse trends of εHf(t) values and corresponding changes in crustal incubation time. These trends are consistent with a switch from advancing to retreating subduction. The switch likely occurred at ca. 760 Ma when zircon εHf(t) values increase and crustal incubation times decrease following a transitional shift between 800 Ma and 760 Ma. A switch at this time is consistent with Rodinia breakup and may have resulted in the late Neoproterozoic Tarim rift basin. The long-lived (ca. 500 Ma) subduction recorded in the Tarim Craton suggests the predominance of a top-down process for Rodinia breakup on this part of its margin.http://www.sciencedirect.com/science/article/pii/S1674987120300852Supercontinent breakupTop-down tectonicsRodiniaSubductionU–Pb–Hf isotopes |
| spellingShingle | Guanghui Wu Shuai Yang Wei Liu R. Damian Nance Xin Chen Zecheng Wang Yang Xiao Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup Geoscience Frontiers Supercontinent breakup Top-down tectonics Rodinia Subduction U–Pb–Hf isotopes |
| title | Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup |
| title_full | Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup |
| title_fullStr | Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup |
| title_full_unstemmed | Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup |
| title_short | Switching from advancing to retreating subduction in the Neoproterozoic Tarim Craton, NW China: Implications for Rodinia breakup |
| title_sort | switching from advancing to retreating subduction in the neoproterozoic tarim craton nw china implications for rodinia breakup |
| topic | Supercontinent breakup Top-down tectonics Rodinia Subduction U–Pb–Hf isotopes |
| url | http://www.sciencedirect.com/science/article/pii/S1674987120300852 |
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