| Title | Provenance of the Middle Permian Zhesi Formation in central Inner Mongolia, northern China: constraints from petrography, geochemistry and detrital zircon U-Pb geochronology |
| Authors | Chen, Yan Zhang, Zhicheng Li, Ke Li, Qiugen Luo, Zhiwen |
| Affiliation | Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China. Peking Univ, Sch Earth & Space Sci, 5 Yiheyuan Rd, Beijing 100871, Peoples R China. |
| Keywords | Central Asian Orogenic belt Inner Mongolia Zhesi Formation provenance geochemistry detrital zircon U-Pb isotopic dating ASIAN OROGENIC BELT BIMODAL VOLCANIC-ROCKS GEOLOGICAL SIGNIFICANCE TECTONIC IMPLICATIONS SEDIMENTARY-ROCKS PLATE-TECTONICS PALEOGEOGRAPHIC RECONSTRUCTION CONTINENTAL GROWTH SOLONKER SUTURE CRUSTAL GROWTH |
| Issue Date | 2017 |
| Publisher | GEOLOGICAL JOURNAL |
| Citation | GEOLOGICAL JOURNAL.2017,52(1),92-109. |
| Abstract | The exceptionally thick Middle Permian Zhesi Formation is considered key to understanding the late Palaeozoic tectonic setting of the North China-Mongolia segment of the Central Asian Orogenic Belt, yet its sedimentary environment and provenance remain ambiguous. An integrated approach incorporating detailed field observation and measurement, framework petrography, whole-rock geochemistry and detrital zircon U-Pb geochronology is applied here to investigate this problem. The framework petrography and whole-rock geochemical characteristics jointly suggest that the Zhesi Formation was derived primarily from felsic upper continental crust, with the source rocks undergoing intermediate weathering and short-distance transportation. Furthermore, the source rocks were composed of granites/granitoids that occurred in a transitional recycled orogen. LA-ICP-MS U-Pb detrital zircon data from sandstone samples show two main age groups of 480-410 and 290-265Ma. Accordingly, we deduce that the dominant provenance of the Zhesi Formation was northerly early to mid-Palaeozoic orogenic belt, late Palaeozoic granites/granitoids and volcanics, with a possible contribution from the Hunshandake Block. The subsiding depositional environment of this succession is in response to the Middle Permian extensional tectonic setting of the orogenic belt. Copyright (c) 2015 John Wiley & Sons, Ltd. |
| URI | http://hdl.handle.net/20.500.11897/476400 |
| ISSN | 0072-1050 |
| DOI | 10.1002/gj.2735 |
| Indexed | SCI(E) |
| Appears in Collections: | 地球与空间科学学院 造山带与地壳演化教育部重点实验室 |
