Constraints on the paleogeographic evolution of the North China Craton during the Late Triassic–Jurassic

Provenance and tectonic-paleogeographic evolution: Constraints from detrital zircon U–Pb ages of Late Triassic-Early Jurassic deposits in the northern Sichuan basin, central China

“…However, the southern NCB is found to expose magmatic rocks with the 270 Ma age peak ( Fig. 9a; Li et al, 2010b;Li and Huang, 2013;Shi et al, 2013, and references therein;Zhu et al, 2014), which is most likely to correlate with the detrital zircons in both the western, southern and eastern Sichuan basin and the SGT of Middle-Upper Triassic.…”

Re-discussion on the detrital zircon provenance of the lower Yanchang Formation in the southern Ordos Basin

“…With the advent of the sensitive high resolution ion micro-probe (SHRIMP) and laser ablationinductively coupled plasma mass spectrometry (LA-ICP-MS), large populations of detrital zircon grains can be analyzed quickly. More recently, LA-ICP-MS U-Pb dating has been performed on detrital zircons from the Yanchang Formation in the southern Ordos Basin [14,15]. Xie and Heller conducted LA-ICP-MS U-Pb dating at the GeoAnalytical Laboratory at Washington State University (Pullman, Washington, USA).…”

“…One hundred and fifty-eight (158) grains gave concordant ages (concordance > 90%) [14]. Li and Huang [15] carried out the Zircon U-dating at the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences in Wuhan. Laser sampling was conducted using a 193-nm GeoLas 2005 laser ablation system with a spot size of 32 µm.…”

“…It is still controversial whether the Qinling Orogen provided the source material for the lower Yanchang Formation in the southern Ordos Basin. With dramatic advances in analytical methodology, detritalzircon geochronology has been widely applied in the reconstruction of sediment pathways between source areas and the Ordos Basin [14,15]. Based on recent results from the detrital-zircon geochronology analysis, the lower Yanchang Formation was hypothesized to be mainly derived from recycled sediments of the central-eastern NCC [14,15].…”

“…To study the provenance of the Yanchang Formation, we collected published data of the detrital zircons from the lower Yanchang Formation. We combined the data from multiple studies [14,15], and reinterpreted and reanalyzed the results. The new results provide insight into the provenance, sediment dispersal pattern and sedimentary evolution of the Yanchang Formation.…”