The age determination of Late Carboniferous intrusions in Mangqisu region and its constraints to the closure of oceanic basin in South Tianshan, Xinjiang
新疆南天山盲起苏晚石炭世侵入岩的确定及对南天山洋盆闭合时限的限定

Granodiorite dominated Mangqisu intrusions in the middle of Erben Mountains of South Tianshan was regarded as Devonian product previously. The authors dated the intrusions using zircon SHRIMP U-Pb approach, which yielded two ages of 296.9±5.4Ma and 304.2±11.6Ma. The intrusions also have characteristics of metaluminous and peraluminous syn-collision granite petrology. Coupled with the data of post orogenic k-rich granites in Permian and other regional geological data, the authors proposed the South Tianshan Paleozoic oceanic basin have been closed in Late Carboniferous.