A post-collisional magmatic plumbing system: Mesozoic granitoid plutons from the Dabieshan high-pressure and ultrahigh-pressure metamorphic zone, east-central China

U-Pb zircon ages for a collision-related K-rich complex at Shidao in the Sulu ultrahigh pressure terrane, China.

“…Available age data indicate that the continental collision and UHP metamorphism took place in Early Triassic, around 240 to 220 Ma (e.g., Ames et al, 1993Ames et al, , 1996Chavagnac and Jahn, 1996;Hacker et al, 1998Hacker et al, , 2000Li et al, 1993aLi et al, , 1996Li et al, , 1997Li et al, , 2000Rowley Qinling-Dabie-Sulu orogenic belt. Most of them are post-collisional, emplaced during Early Cretaceous, around 140 to 120 Ma (Chen et al, 1995;Eide et al, 1994;Jahn et al, 1999;Ma et al, 1998;Xie et al, 1996Xie et al, , 2001). Syn-collisional granites have only been identified in South Qinling.…”

Petrogenesis of the early Cretaceous volcanic rocks in the North Huaiyang tectono-magmatic unit of the Dabie Orogen, eastern China: Implications for crust–mantle interaction

“…The crustal components that may contribute to the final composition of the Jingangtai volcanic rocks include those of the Yangtze lower crust represented by the Kongling TTG rocks and Yangtze upper/middle crust (Zhang et al, 1994Chen and Jahn, 1998;Ma et al, 1998Ma et al, , 2000Gao et al, 1999;Guo et al, 2001). Mixing calculations show that the addition of 10-20% Yangtze lower crust and Yangtze upper/middle crust will yield a magma composition which closely matches the compositions of the Jingangtai volcanic rocks in Nd and Sr isotopes (Fig.…”

“…The numbers indicate the percentages of participation of the crustal materials. The calculated parameters of Sr, I Sr , Nd and e Nd (t) are 60 ppm, 0.7050, 4 ppm and À7 for Jinan gabbro source (representative of the NCC lithospheric mantle); 200 ppm, 0.7120, 29 ppm and À33 for Kongling TTG rocks (representative of the YZC lower crust) and 220 ppm, 0.7150, 20 ppm and À20 for the YZC upper/middle crust, respectively (Chen and Jahn, 1998;Ma et al, 1998Ma et al, , 2000Gao et al, 1999;Guo et al, 2001;Zhang et al, , 2004.…”

“…Since late Mesozoic, eruption of voluminous volcanic sequences, emplacement of massive granitic plutons and scattered mafic-ultramafic intrusions and dykes are widespread along the NHY (Ma et al, 1998;Jahn et al, 1999) (Fig. 1).…”

Record of Post-Collisional A-Type Magmatism in the Alwar Complex, Northern Aravalli Orogen, NW India

“…These results provide a new dimension to the understanding of palaeoproterozoic crustal evolution in the Aravalli orogen. Furthermore, crustal anatexis triggered by hot mantle-derived underplated magma is considered as the most favourable process of A-type magma generation in post-collisional extensional setting 11,[52][53][54] . The contribution of mantle melts in the generation of A-type magmas is still not well understood.…”