The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction
Detailed geochronological, geochemical, and paleomagnetic studies of mafic dyke swarms, often associated with mantle plumes, can provide unique constraints on paleogeographic reconstructions. Mafic dykes with baddeleyite U–Pb ages of 1,233 ± 27 Ma (SIMS), 1,206.7 ± 1.7 Ma (TIMS), 1,214.0 ± 4.9 Ma (T...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
AMER GEOPHYSICAL UNION
2020
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90595 |
| _version_ | 1848765397669511168 |
|---|---|
| author | Wang, Chong Peng, P. Li, Zheng-Xiang Pisarevsky, Sergei Denyszyn, S. Liu, Yebo Gamal El Dien, Hamed Su, X. |
| author_facet | Wang, Chong Peng, P. Li, Zheng-Xiang Pisarevsky, Sergei Denyszyn, S. Liu, Yebo Gamal El Dien, Hamed Su, X. |
| author_sort | Wang, Chong |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Detailed geochronological, geochemical, and paleomagnetic studies of mafic dyke swarms, often associated with mantle plumes, can provide unique constraints on paleogeographic reconstructions. Mafic dykes with baddeleyite U–Pb ages of 1,233 ± 27 Ma (SIMS), 1,206.7 ± 1.7 Ma (TIMS), 1,214.0 ± 4.9 Ma (TIMS), and 1,236.3 ± 5.4 Ma (TIMS) have been identified in the eastern North China Craton. Geochemical data indicate subalkaline to alkaline basalt compositions with OIB‐like trace element signatures and an intraplate tectonic setting. In addition to these geochemical signatures, the radiating geometry of these dykes also suggests a 1.24–1.21 Ga large igneous province caused by a mantle plume event. A new ~1.24 Ga paleomagnetic pole at 2.0°N, 165.1°E, A95 = 11.0°, N = 9 and an ~1.21 Ga VGP at −23.0°N, 92.5°E, dp/dm = 4.7°/7.8° have been obtained from these dykes, with the 1.24 Ga pole supported by positive baked contact test. Our paleomagnetic analyses suggest that the North China Craton and the proto‐Australian continent could have been separated by 1.24–1.21 Ga from an established Nuna connection at ca. 1.32 Ga. By comparison with Laurentia paleopoles, we present the paleogeography of dispersing North China, proto‐Australian, and Laurentia cratons in the late Mesoproterozoic during the breakup of the supercontinent Nuna. |
| first_indexed | 2025-11-14T11:34:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-90595 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:34:36Z |
| publishDate | 2020 |
| publisher | AMER GEOPHYSICAL UNION |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-905952023-03-23T01:46:52Z The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction Wang, Chong Peng, P. Li, Zheng-Xiang Pisarevsky, Sergei Denyszyn, S. Liu, Yebo Gamal El Dien, Hamed Su, X. Science & Technology Physical Sciences Geochemistry & Geophysics ZIRCON U-PB DYKE SWARMS COLUMBIA SUPERCONTINENT GEOLOGICAL SIGNIFICANCE WESTERN SHANDONG VOLCANIC-ROCKS NUNA COLUMBIA MAFIC DYKES RODINIA MAGMATISM Detailed geochronological, geochemical, and paleomagnetic studies of mafic dyke swarms, often associated with mantle plumes, can provide unique constraints on paleogeographic reconstructions. Mafic dykes with baddeleyite U–Pb ages of 1,233 ± 27 Ma (SIMS), 1,206.7 ± 1.7 Ma (TIMS), 1,214.0 ± 4.9 Ma (TIMS), and 1,236.3 ± 5.4 Ma (TIMS) have been identified in the eastern North China Craton. Geochemical data indicate subalkaline to alkaline basalt compositions with OIB‐like trace element signatures and an intraplate tectonic setting. In addition to these geochemical signatures, the radiating geometry of these dykes also suggests a 1.24–1.21 Ga large igneous province caused by a mantle plume event. A new ~1.24 Ga paleomagnetic pole at 2.0°N, 165.1°E, A95 = 11.0°, N = 9 and an ~1.21 Ga VGP at −23.0°N, 92.5°E, dp/dm = 4.7°/7.8° have been obtained from these dykes, with the 1.24 Ga pole supported by positive baked contact test. Our paleomagnetic analyses suggest that the North China Craton and the proto‐Australian continent could have been separated by 1.24–1.21 Ga from an established Nuna connection at ca. 1.32 Ga. By comparison with Laurentia paleopoles, we present the paleogeography of dispersing North China, proto‐Australian, and Laurentia cratons in the late Mesoproterozoic during the breakup of the supercontinent Nuna. 2020 Journal Article http://hdl.handle.net/20.500.11937/90595 10.1029/2019JB019005 English http://purl.org/au-research/grants/arc/FL150100133 http://creativecommons.org/licenses/by-nc/4.0/ AMER GEOPHYSICAL UNION fulltext |
| spellingShingle | Science & Technology Physical Sciences Geochemistry & Geophysics ZIRCON U-PB DYKE SWARMS COLUMBIA SUPERCONTINENT GEOLOGICAL SIGNIFICANCE WESTERN SHANDONG VOLCANIC-ROCKS NUNA COLUMBIA MAFIC DYKES RODINIA MAGMATISM Wang, Chong Peng, P. Li, Zheng-Xiang Pisarevsky, Sergei Denyszyn, S. Liu, Yebo Gamal El Dien, Hamed Su, X. The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title | The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title_full | The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title_fullStr | The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title_full_unstemmed | The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title_short | The 1.24–1.21 ga licheng large igneous province in the North China craton: Implications for paleogeographic reconstruction |
| title_sort | 1.24–1.21 ga licheng large igneous province in the north china craton: implications for paleogeographic reconstruction |
| topic | Science & Technology Physical Sciences Geochemistry & Geophysics ZIRCON U-PB DYKE SWARMS COLUMBIA SUPERCONTINENT GEOLOGICAL SIGNIFICANCE WESTERN SHANDONG VOLCANIC-ROCKS NUNA COLUMBIA MAFIC DYKES RODINIA MAGMATISM |
| url | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90595 |