Age assignment of the upper Carboniferous Arbasay Formation in Shichang Region, North Tianshan (NW China)
| Autor: | Jun Wu, Wen Zhu, Jialin Wang, Chaodong Wu, Jun Wang, Meng-Lin Zheng, Xi Jiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Xinjiang Geochemistry Pyroclastic rock Volcaniclastic rock Junggar-Balkhash Ocean 010502 geochemistry & geophysics Ophiolite LA–ICP–MS zircon U–Pb dating 01 natural sciences Stratigraphic age Sedimentary depositional environment Volcano lcsh:Paleontology Carboniferous Suture (geology) Sedimentology lcsh:QE701-760 Geology 0105 earth and related environmental sciences Zircon |
| Zdroj: | Journal of Palaeogeography, Vol 7, Iss 1, Pp 1-11 (2018) |
| ISSN: | 2524-4507 |
| DOI: | 10.1186/s42501-018-0003-5 |
| Popis: | The North Tianshan Orogenic Belt contains the youngest ophiolites in the Tianshan and provides some information on timing of the last closure of the Junggar-Balkhash Ocean. LA–ICP–MS zircon U–Pb dating was conducted to define the formation age of the Arbasay Formation in the Shichang Region of North Tianshan, which is exposed near the suture zone but its age remains debated. The Arbasay Formation is mainly composed of volcanic and volcaniclastic rocks with tuff interlayers. The zircons from the tuffs yield two age populations of 315 ± 3 Ma and 304 ± 2 Ma, constraining the commencement and demise timings of volcanism, respectively. Furthermore, zircon U–Pb age spectra of the tuffaceous sandstones display the youngest peak age at 308 Ma, indicating a |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|