Isotopic chronology and geological events of Precambrian complex in Taihangshan region

Geochemistry of the paleoproterozonic Nanying granitic gneisses in the Fuping complex: implications for the tectonic evolution of the Central Zone, North China Craton

“…4. the mafic dikes and the Nanying granitic gneisses along the Chengnanzhuang shear zone (, 2.5 -2.0 Ga); (4) S-type granite magmatism and associated amphibolite facies metamorphism related to collision between the Eastern and Western continental blocks (, 2.0 -1.80 Ga; Zhao et al, 2002a,b;Wilde et al, 2002;Guan et al, 2002); and (5) emplacement of granitic pegmatite dikes at , 1.80 Ga (cf. Wilde et al, 1997;Liu et al, 2000;Zhao et al, 2002).…”

“…For example, the Nanying gneisses in the Fuping Complex, originally considered to be metasedimentary rocks, have only recently been recognized to represent granitoids intruding a major ductile shear zone (i.e. the Chengnanzhuang shear zone; Tang and Liu, 1997;Liu and Liang, 1999;Liu et al, 2000Liu et al, , 2002b. SHRIMP zircon U -Pb analyses Guan et al, 2002) showed that the Nanying granitic gneisses were emplaced at , 2.0 Ga, significantly younger than the formation of TTG gneisses at , 2.50 Ga, but older than the collisional event at , 1.80 Ga Zhao et al, 2002).…”

Geological, geochronological and geochemical features of granulites in the Eastern Tianshan, NW China

“…Its geochemical characteristics can be used as fingerprints of lower crustal rock units ( Yu et al, 2003). Exposure of granulite results from exhumation events ( Menzies, 1992), following retrograde metamorphism due to decompression and cooling ( Ellis, 1987 andLiu et al, 2000). Therefore, granulite is an important candidate for the study of metamorphic and exhumation processes.…”

Late Paleoproterozoic rift-related magmatic rocks in the North China Craton: Geological records of rifting in the Columbia supercontinent

“…Zhao et al (2001aZhao et al ( , 2006Zhao et al ( , 2007Zhao et al ( , 2011, Wilde et al (2002), Kröner et al (2005Kröner et al ( , 2006 and J. Zhang et al (2006Zhang et al ( , 2009 proposed that an east-directed subduction with the second collisional event occurred at~1.85 Ga, forming the Trans-North China Orogen along which the Western and Eastern Blocks collided to form the coherent basement of the NCC (also see Liu et al, 2000;Zhao et al, 2000a,b;Zhao, 2001;Liu et al, 2006;Xia et al, 2009;Li et al, 2010;Xiao et al, 2011). These two collisional events occurred within the time span (1.95 1.85 Ga) of the global-scale collisional events that led to the assembly of the Columbia supercontinent (G.C.…”