Constraints on crustal evolution and gold metallogeny in the Northwestern Jiaodong Peninsula, China, from SHRIMP U–Pb zircon studies of granitoids

Origin of early Cretaceous calc-alkaline lamprophyres from the Sulu orogen in eastern China: implications for enrichment processes beneath continental collisional belt

“…These ages are identical to the major gold mineralization and emplacement ages of voluminous granitic magmas (120 -130 Ma) in Jiaodong Peninsula (e.g., Qiu et al, 2002;Yang and Zhou, 2001;Wang et al, 1998). Therefore, the widespread emplacement of lamprophyres occurred within the early Cretaceous and was contemporaneous to the regional granitic magmatism and large-scale gold mineralization episodes.…”

“…In the north are a late Archean to early Proterozoic terrane of North China Block affinities and the Mesozoic Laiyang basin (e.g., Cao et al, 1990;Zhai et al, 2000;Fan et al, 2001), whereas Proterozoic Jiaonan and Fenzishan Groups with Triassic interbedded UHP rocks occur in south (e.g., Ye et al, 1996;Cong, 1996;Jahn et al, 1996). The occurrence of HP-UHP rocks and voluminous granitoid plutons and associated large-scale gold mineralization make it an important region for studying the orogenic processes of continental subduction, the role of crustmantle interaction and origins of gold deposits (e.g., Jahn et al, 1996;Ye et al, 2000;Fan et al, 2001;Wang et al, 1998;Yang and Zhou, 2001;Qiu et al, 2002).…”

Repeated modification of lithospheric mantle in the eastern North China Craton: Constraints from SHRIMP zircon U-Pb dating of dunite xenoliths in western Shandong

“…Based on these findings, we conclude that the zircons with ages of 151-164 Ma are of magmatic origin. These ages (151-164 Ma) are consistent with the SHRIMP zircon U-Pb age of the Huaziyu mafic lamprophyre in eastern Liaoning province (155±4 Ma) [56], and with zircon U-Pb ages of the Jingshan granitoids in the Bengbu area, the Duogushan and Wendeng granitoids in the northern section of the Sulu ultrahighpressure metamorphic belt (155-160 Ma) [54,57], the Linglong and Luanjiahe granitoids in eastern Shandong (155-160 Ma) [53], and Late Jurassic granitoids in eastern Liaoning [58]. Late Jurassic magmatism in the eastern NCC was generally characterized by intensive felsic magmatic events, whereas little mafic magmatism occurred at this time (e.g.…”

“…The weighted mean 206 Pb/ 238 U age of 139±4 Ma (MSWD = 0.75) for seven spots is consistent with timing of formation of the Tietonggou high-Mg diorites (131-135 Ma) [28,29] within error, suggesting that the zircons formed during a period of intensive interaction between delaminated lower continental crustderived melt and mantle peridotite. These ages also are consistent with the timing of large-scale mantle-and crustderived magmatism in the eastern NCC during the Early Cretaceous, such as the Jinling, Yi'nan (Shangyu), and Ji'nan intrusions in western Shandong (127-134 Ma) [29,[48][49][50]; the Liguo, Jiagou, Banjing, Fengshan, and Caishan intrusions in Xuzhou-Huaibei (127-132 Ma) [51,52]; and granitoids in eastern Shandong and eastern Liaodong (120-130 Ma) [53][54][55].…”

Marked change in sandstone composition during the Middle Jurassic in Jurassic accretionary complexes of SW Japan, and geologic significance

“…2, 3 1990 Takami et al, 1993;Takami and Itaya, 1996Murata, 1981 , 1992; Fig. 4 Takami and Itaya 1996 Takami and Itaya, , 1987;h , 1991; Dabie Sulu Chwae, 1998;Ishiwatari and Tsujimori, 2003;Kim et al, 2003;Oh and Kusky, 2007;Zhai et al, 2007;Cho et al, 2008;Kwon et al, 2009 Wang et al, 1998;Yang et al, 2005;Huang et al, 2006;Hou et al, 2007;Huang et al, 2008Huang et al, , 1971, 1975;Adachi, 1976;, 1984; 1989 1989 …”