Zircon SHRIMP U–Pb geochronology, geochemistry, and geological significance of dacite in the Zhesang gold district, southeast Yunnan Province, China

Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China

“…The intrusion forms an irregular ellipse body that is generally elongated in the S–N direction, covering ~28 km 2 . The Gejiu alkaline complex yielded emplacement ages of 80–82 Ma and intruded into Triassic sandstone and carboniferous rocks (Zhang, 2013; Huang et al , 2018; Wang et al , 2021). The pinkish feldspathoid syenite is a massive, medium- to coarse-grained rock and contains the feldspathoid minerals nepheline and sodalite as well as dark alkaline minerals.…”