Geochemistry of late Mesozoic mafic magmatism in west Shandong Province, eastern China: Characterizing the lost lithospheric mantle beneath the North China Block.

Mesozoic mafic dikes from the Shandong Peninsula, North China Craton: Petrogenesis and tectonic implications

“…Comparative studies of mantle xenoliths captured by Ordovician kimberlites and Cenozoic alkaline basalts suggested that more than 100 km of ancient refractory lithospheric mantle beneath NCC has been removed and replaced by young and more fertile mantle materials (Menzies et al, 1993;Griffin et al, 1998;Xu, 2001;Guo et al, 2003). The triggering mechanism of the tremendous thinning and replacement of the lithospheric mantle, however, is still in debate.…”

“…The eastern part is named Jiaodong and the western part is called Luxi. Mesozoic mafic intrusions and volcanic rocks are widely distributed in both Jiaodong and Luxi regions Guo et al, 2003Guo et al, , 2004Yang et al, 2004). This study focuses on a suite of mafic dikes from the Jiaodong (Weihai, Yantai, and Longkou) and Luxi (Zichuan and Mengyin) regions (Fig.…”

Two tales of the continental lithospheric mantle prior to the destruction of the North China Craton: Insights from Early Cretaceous mafic intrusions in western Shandong, East China

“…1b), may capture information about the lithospheric mantle prior to the destruction of the NCC. Previous studies focused on the age, geochemistry and petrogenesis of these rocks (e.g., Guo et al, 2001Guo et al, , 2003Yang et al, 2005;Li et al, 2007). However, source characteristics and their implications for the evolution of the lithospheric mantle beneath the southeastern NCC remain uncertain.…”

Adakitic rocks associated with the Shilu copper–molybdenum deposit in the Yangchun Basin, South China, and their tectonic implications

“…Moreover, magmatic activity has been documented at around 100 Ma in western Guangdong (Geng et al 2006). For ore-forming (Kay et al 1993;Stern et al 1984); The compositions of EMI, EMII and average continental crust are from references (Guo et al 2003;Hofmann 1997;Li and Yang 2003;Rudnick and Gao 2003). The mixing lines with circle symbols are for Sr = 400 ppm, and the mixing lines with cross symbols are for Sr = 1000 ppm.…”