At the end of the second tectonic cycle, when the Elder South China ocean is closed with collisional matching, the Yangtze and Cathaysian blocks Lapatinib msds are cohered together to form South China block which is a part of Rodinia supercontinent [55]. Affected by the fragmentation events of Rodinia supercontinent (Figure 2(a)), the South China block is splitted up into Yangtze and Cathaysian blocks again (Figure 2(b)). Additionally, the prevenient Cathaysian block is further splitted up into three slight blocks with rift troughs as insulation, and these small blocks are named South Zhejiang��North Fujian mountain, Middle Jiangxi��South Jiangxi mountain and Yunkai mountain [31]. There is a collisional matching for the Yangtze and Cathaysian plates during the Caledonian event, and the two plates are cohered to a unified South China block again which agrees with the formation of Gondwana supercontinent.

As a part of the Gondwana supercontinent, the South China block is covered by the Neodevonian uniform sedimentary veneer entirely. There are several cycles of tension and compression after the Caledonian movement [34], when the whole South China plate is resplitted up again with the separation of Yangtze and Cathaysian plates. Between Yangtze and Cathaysian plates, there also exists the QHJB, whose tectonic property remains an uncertainty and will be discussed in this paper. In the published papers, the QHJB is an ocean basin due to the Neopaleozoic ophiolitic melange [28] and early Mesozoic acid volcanic rocks [35], but it is also treated to be an inland fault zone and rift [56] for the absence of ophiolitic and homochronous magmatic rocks since Sinian [31].

During the Hercynian and Indosinian, the tension ends up with compression contributed by the final Hercynian movement and Indosinian movement. The ultimate matching for the Yangtze and Cathaysian plates is due to the Dongwuian event in Permian [41], and the whole plate solidified as the result of the Yanshan movement [56].Figure 2Early Neoproterozoic configuration of north Rodinia supercontinent (a) and South China block (b) ((a) after [54]; (b) after [57]).2.2. Geological Characteristics of Dongxiang AreaThe QHJB is divided into north, middle, and south segments due to the diversities in metallogenesis and geological evolution. In the previous studies, there are obvious differences in QHJB for Entinostat its metallogenesis [37, 39], hydrothermal sedimentation [38], and geological evolution [36], which denote a subsection with latitude lines of 24��N and 27��N (Figure 3(a)). According to this, the QHJB is divided into north, middle, and south segments, and the middle segment of QHJB (24�C27��N) is in accordance with Nanling mountain chain.