New evidence for Neoarchean (ca. 2.7 Ga) crustal growth in the North China Craton

Petrogenesis and tectonic significance of Neoarchean (~2.6 Ga) alkaline ultrapotassic granitic gneisses from the southeastern margin of the North China Craton: Constraints from U-Pb dating, Hf isotope and petrogeochemistry

“…1). According to some studies the NCC can be divided into an Eastern Block and a Western Block which collided at ~1.85 Ga to form the Trans North China Orogen (TNCO) (Diwu et al, 2020;Wu et al, 2005;Zhao et al, 2005). The eastern portion of the craton can be further subdivided into the Langrim and Longgang blocks, separated by the Paleoproterozoic Jiao-Liao-Ji belt (JLJB) (Zhao et al, 2010;Zhao and Zhai, 2013).…”