Intraplate crustal remelting as the genesis of Jurassic high-K granites in the coastal region of the Guangdong Province, SE China

2013 ◽  
Vol 74 ◽  
pp. 280-302 ◽  
Author(s):  
Hui-Qing Huang ◽  
Xian-Hua Li ◽  
Zheng-Xiang Li ◽  
Wu-Xian Li
2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shujian Zhang ◽  
Li Wang

PurposeWe are in an information age, and the relationship between government governance and market efficiency has become closer. When examining the behavior of governance, the study of government transparency is very important. This paper examines the environmental governance performance of Guangdong province, the most developed coastal region in China.Design/methodology/approachDEA method is adopted to calculate the environmental governance efficiency by considering the expected output and the nonexpected output. Then Tobit regression was used to analyze the relationship between fiscal transparency and environmental governance efficiency.FindingsThrough a quantitative study of empirical data of Guangdong province from 2001 to 2017, it is found that fiscal transparency does have a significant positive impact on the efficiency of local environmental governance. Therefore, it is suggested that all regions in Guangdong should be more transparent in administration, intensify industrial transformation and upgrading, and better govern the regional ecological environment.Originality/valueThis paper examines the environmental governance performance of Guangdong province, the most developed coastal region in China. Guangdong has developed economy and people’s living standards are high, so the market and residents are particularly concerned about the government performance in environmental governance. Therefore, it is an important issue to explore the relationship between environmental governance and government transparency in Guangdong.


Author(s):  
Cheng-Hong Chen ◽  
Wayne Lin ◽  
Ching-Ying Lan ◽  
Chi-Yu Lee

ABSTRACTLate Yanshanian magmatism in SE China includes three stages of thermal event induced by the interaction between the continental margin of Eurasia and the paleo-Pacific plate during the Cretaceous period. Products of syn-orogenic magmatism (130–110 Ma) include high-Al gabbros (HAG), and gneissic tonalite, trondhjemite and granodiorite (TTG), which intruded into the deep basement (18–24 km). Rocks of the post- and an-orogenic magmatism are shallow-level (6–8 km) I-type granitoids (110–99 Ma), and miarolitic A-type granites plus rhyolite-dominate bimodal volcanics (94–81 Ma), respectively. Geochemically, HAG and TTG belong to the medium-K calc-alkaline affinity with high Sr/Y, whereas other granitoids are mainly high-K calc-alkaline to shoshonitic rocks with low Sr/Y. Sr and Nd isotope compositions suggest different sources of HAG and TTG from other rocks. Progressive depletions of Ba, Sr, Eu and P from I- to A-type granites reflect partial melting of felsic granulites from hydrous to dry conditions, whereas high Sr/Y in HAG and TTG are compatible with dehydration melting of amphibolites. Tectonic models which accommodate HAG and TTG may involve thickening of the lithosphere to convert the pre-existing lower-crust basic rocks into amphibolites. It was followed by basaltic underplating which is attributed to delamination of the thickened lithosphere and led to triggering of crust melting under exten


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