The Foziling Group （FZG） located in the northernmost margin of the Dabie orogenic belt between the north and aouth plates, and is the critical litho-unit for gaining the coupling process and information of these plates. For a long time, the FZG has been defined as the typical ‘lower-metamorphic’ flysch formation, and usually investigated by means of the sedimentology, so that some different standpoints have been formed for its attribution and dynamic mechanism. In this study, the components and metamorphism of the FZG has been insight from a new view-metamorphic petrology. On the basis of the fieldtrip and the detail petrographic analysis, the FZG mainly consists of different kinds of schists, quartzite and a small quantity of garnet-mica schist. However, some granitic gneiss and metamorphic basic rocks from other litho-units have been juxtaposed as tectonic blocks in the FZG due to structure activity. The main metamorphic PT estimates for garnet-mica schists indicate that the FZG has been metamorphosed in the middle-high pressure amphibolite facies, universally, and arrive to T = 550 ℃～620 ℃和P = 0.6～1.0 GPa. Through the careful observation in the outcrop and the detail petrologic analysis, all kinds of rock from the FZG composed of metamorphic minerals, and develop conspicuous crystalloblastic structure, and have no any sedimentary structure and tectonic. The so called ‘sedimentary rhythm’ result from the content difference of metamorphic minerals. Compared with previous researches, a～0.9 GPa pressure discrepancy exists between the FZG and the Luzhenguan Group, which mplies that the two units have been formed in different dynamic setting, and the FZG could be an independent micro continent.
Shi Yonghong Shi Jinfei Zhao Junxian Yang Genshan Zhou Antai. Insight into the “lower-metamorphic” Foziling Group from the metamorphic petrology and its tectonic implication[J]. Chinese Journal of Geology, 2019, 54(3): 691-710.