Metamorphic Evolution and Zircon U-Pb Ages of the Nanshankou Mafic High Pressure Granulites from the Jiaobei Terrane, North China Craton

No evidence for Archean eclogite-facies metamorphism

“… 2 ). ( C ) Validity test of the Grt-Cpx geobarometer ( 2 ) applied to published metamorphic rocks ( 6 – 8 ). ( D ) Validity test of the REE-in-Grt-Cpx geobarometer ( 3 ) applied to samples with low Mg # (<0.4) garnet ( 7 , 9 ).…”

Petrology and zircon U–Pb dating of meta-calcsilicate from the Jiaobei terrane in the Jiao-Liao-Ji Belt of the North China craton

“…Zhou et al, 2008;Tam et al, 2011;Tam et al, 2012a, b, c;S.J. Liu et al, 2015;Chen et al, 2018). Similar ages, however, were only rarely found in zircon from the meta-calcsiliscates, but, if so, not all are located on the concordant curve ( Fig.…”

“…Previous studies have mainly focused on outcrops of HP mafic granulites within the Jiaobei terrane, which mostly occur as rock inclusions and lenses within TTG and granite gneisses (P. H. Tam et al, 2012c;Li et al, 1997;X.-P. Li et al, 2013;S.J. Liu et al, 2015;Chen et al, 2018). U-Pb zircon geochronological studies indicate that the protoliths of the HP mafic granulites were formed in the Neoarchean (2.9-2.5 Ga) and metamorphosed in the Paleoproterozoic at ~1.95-1.90…”

Nature and evolution of the lithospheric mantle revealed by water contents and He-Ar isotopes of peridotite xenoliths from Changbaishan and Longgang basalts in Northeast China

“…The earliest North China Craton (NCC) crust formed at about 3.8 Ga and is considered to be among the most ancient Archean cratons [19]. It experienced multiple Late Archean and Paleoproterozoic tectonic stages [20][21][22]. Since the Phanerozoic, collision has occurred between the NCC and adjacent blocks and plates, following which different oceanic plates were subducted under the NCC [23][24][25][26].…”