Tectonic setting and exhumation history of the Pingtan–Dongshan Metamorphic Belt along the coastal area, Fujian Province, Southeast China

Phanerozoic tectonics of the South China Block: Key observations and controversies

“…In contrast, the Jurassic sequence to the east of the fault is dominated by the lower-middle Jurassic terrestrial siliciclastics (only some remnants of early Jurassic neritic rocks are preserved in the Meizhou area of eastern Guangdong). The middle Jurassic bimodal volcanic sequence is additionally observed in western Fujian, southern Jiangxi and eastern Hunan Provinces in the eastern SCB along the E-W trending Nanling Range (e.g., Chen et al, 1999Chen et al, , 2002aChen et al, , 2002bLi et al, 2003Li et al, , 2004Deng et al, 2004a;Wang et al, 2005bWang et al, , 2008Chen et al, 2008a;Shu et al, 2008aShu et al, , b, 2009a. In the eastern SCB, upper Jurassic strata are commonly absent with the exception of sparse exposures in the Yongding-Meizhou basin (e.g., Guangdong BGMR, 1988;Shu et al, 2009a, b).…”

“…It is regarded by many geologists as a Cretaceous (82-132 Ma) strike-slip shear zone overriding the active continental margin of the SCB (e.g., Charvet et al, 1994;Wang and Lu, 2000;Chen et al, 2002b). However, some researchers considered it as a late Yanshanian suture zone resulting from the collision of Southeast Asia with the SCB (Fujian BGMR, 1985;Hsü et al, 1990).…”

“…Xu et al (1993) and Li et al (2001a) highlighted the importance of strike-slip faulting during the late Mesozoic period (e.g., 120-130 Ma). In the coastal regions of Fujian province, the Changle-Nan'ao shear zone was reactivated at 82-132 Ma and is spatially associated with the Pingtan-Dongshan metamorphic belt that was thrust onto early Cretaceous igneous rocks (e.g., Wang and Lu, 2000;Chen et al, 2002b). However, the detailed structural data for the Yanshanian event are rare, and hence the temporal and spatial patterns of the Yanshanian structural style are still unclear.…”

“…It is inferred that such a path is related to the underplating of mantle-derived magmas in settings of continental rifting or arc-back extension along the southern margin of the SCB. The Yanshanian metamorphic rocks are only observed in the Pingtan-Dongshan area of the coastal province of Southeast China (e.g., Wang and Lu, 2000;Chen et al, 2002b).…”

Geochronological, geochemical and Nd–Hf–Os isotopic fingerprinting of an early Neoproterozoic arc–back-arc system in South China and its accretionary assembly along the margin of Rodinia

“…1; Xu et al, 2007a,b;Yu et al, 2009;Wang et al, 2012b) of which the Eastern Cathaysia is largely covered by the Mesozoic volcanic rocks and separated from the western Cathaysia by the Zhenghe-Dapu fault and its inferred southern extension, the Gaoyao-Huilai Fault, along the Nanling and Yunkai domains (Fig. 1, e.g., Chen et al, 2002;Wang et al, 2012a). Western Cathaysia contains a series of structurally disrupted Proterozoic metamorphic domains including the Wuyi, Nanling and Yunkai domains (e.g., Fujian BGMR, 1985;Wang et al, 2012c).…”