摘要
Objective The Trans-North China Orogen(TNCO)is widely considered as a Paleoproterozoic(1.95-1.85 Ga)continental collisional belt along which the Eastern and Western blocks amalgamated to form the North China Craton.In recent years,several late Archean(~2.50 Ga)metamorphic ages were reported in this belt(Yang et al.,2015;Xiao et al.,2019;Wang et al.,2020),arousing widespread discussion on late Archean metamorphism.In the South Hengshan Complex(SHC)of the TNCO,an interesting outcrop has been discovered(Fig.1),which shows a clear truncation relationship between a strongly deformed tonal ite-trondhjemite-granodiorite(TTG)gneiss and a weakly deformed mafic dyke with'red-eye socket'texture(Fig.la).
基金
financially supported by the National Natural Science Foundation of China(Grant Nos.41972197 and 41602048)
the China Postdoctoral Science Foundation(Grant No.2017T100650)
the Guangdong Basic and Applied Basic Research Foundation(Grant No.2019A1515012189)。
