The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana
We report a sequence of thick, well-preserved basaltic lavas interlayered with shallow marine dolomitic carbonates, mudstones and siltstones of the Zhulongguan Group, in the western segment of the North Qilian orogen, northwest China. Two new zircon SIMS ages show that this sequence formed at ~600–5...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier BV
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/12780 |
| _version_ | 1848748172295274496 |
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| author | Xu, X. Song, S. Su, L. Li, Zheng-Xiang Niu, Y. Allen, M. |
| author_facet | Xu, X. Song, S. Su, L. Li, Zheng-Xiang Niu, Y. Allen, M. |
| author_sort | Xu, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We report a sequence of thick, well-preserved basaltic lavas interlayered with shallow marine dolomitic carbonates, mudstones and siltstones of the Zhulongguan Group, in the western segment of the North Qilian orogen, northwest China. Two new zircon SIMS ages show that this sequence formed at ~600–580 Ma. The mafic volcanics can be subdivided into tholeiitic and alkaline basalts, and have compositions similar to present-day ocean island basalt (OIB) or continental flood basalts. The occurrence, geochemical features and age data suggest that the Zhulongguan basalts originated at a continental rift setting in the latest Neoproterozoic, within the north margin of the Qilian-Qaidam block. This volcanic-sedimentary formation exhibits close affinity to the passive continental margin in southeastern Australia. Our observations favor a link of the Qilian-Qaidam block with SE Australia (also south China) during the breakup of Rodinia, thereby filling a void in existing reconstructions of the region. |
| first_indexed | 2025-11-14T07:00:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-12780 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:00:49Z |
| publishDate | 2015 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-127802017-09-13T16:03:15Z The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana Xu, X. Song, S. Su, L. Li, Zheng-Xiang Niu, Y. Allen, M. Continental rifting Qilian-Qaidam block Breakup of East Gondwanaa Zhulongguan basalts Late Neoproterozoic We report a sequence of thick, well-preserved basaltic lavas interlayered with shallow marine dolomitic carbonates, mudstones and siltstones of the Zhulongguan Group, in the western segment of the North Qilian orogen, northwest China. Two new zircon SIMS ages show that this sequence formed at ~600–580 Ma. The mafic volcanics can be subdivided into tholeiitic and alkaline basalts, and have compositions similar to present-day ocean island basalt (OIB) or continental flood basalts. The occurrence, geochemical features and age data suggest that the Zhulongguan basalts originated at a continental rift setting in the latest Neoproterozoic, within the north margin of the Qilian-Qaidam block. This volcanic-sedimentary formation exhibits close affinity to the passive continental margin in southeastern Australia. Our observations favor a link of the Qilian-Qaidam block with SE Australia (also south China) during the breakup of Rodinia, thereby filling a void in existing reconstructions of the region. 2015 Journal Article http://hdl.handle.net/20.500.11937/12780 10.1016/j.precamres.2014.11.017 Elsevier BV restricted |
| spellingShingle | Continental rifting Qilian-Qaidam block Breakup of East Gondwanaa Zhulongguan basalts Late Neoproterozoic Xu, X. Song, S. Su, L. Li, Zheng-Xiang Niu, Y. Allen, M. The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title | The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title_full | The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title_fullStr | The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title_full_unstemmed | The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title_short | The 600–580 Ma continental rift basalts in North Qilian Shan, northwest China: Links between the Qilian-Qaidam block and SE Australia, and the reconstruction of East Gondwana |
| title_sort | 600–580 ma continental rift basalts in north qilian shan, northwest china: links between the qilian-qaidam block and se australia, and the reconstruction of east gondwana |
| topic | Continental rifting Qilian-Qaidam block Breakup of East Gondwanaa Zhulongguan basalts Late Neoproterozoic |
| url | http://hdl.handle.net/20.500.11937/12780 |