There were two phases with siliceous rocks in larger scale (Figure 5), which were in Caledonian and Hercynian, respectively: the first www.selleckchem.com/products/pazopanib.html period for siliceous rocks in large scale was from Neoproterozoic to Ordovician and ended up with scale decreasing abruptly due to the Caledonian movement in Silurian; the second period for siliceous rocks in large scale was from Devonian to Permian and ended up with a sudden reduce in scale due to the Hercynian movement in the end of Permian. Since Triassic, the scales of siliceous rocks persisted to diminish, which were possibly contributed by the regression of the whole of South China. In QHJB, the geological setting was tensional in the Caledonian and Hercynian [31, 33], when the siliceous rocks had large scale with the widest distribution due to these geological settings (Figure 5).

However, the Caledonian movement and Hercynian movement contributed to compressional setting [34, 41], when the siliceous rocks showed small scale with the widest distribution due to the compressional setting. According to this, the widest distributions of siliceous rocks agreed with the tensional setting, whereas the decreasing distributions of siliceous rocks contributed by the compressional setting due to the geological movement. So, the siliceous rocks were preferential to develop more widely in tensional setting in the QHJB and decreased due to the compressional setting.Figure 5Column diagram of localities for siliceous rocks in QHJB (data were calculated from the literature [60�C64]).4.1.2.

Spatial Distribution The distribution of siliceous rocks acted as indication of the geological setting, and the tensional setting was propitious for the development of siliceous rocks. The siliceous rocks were widely distributed in Southeast China, whose majority were located in the category of inner and adjacency QHJB (Figures 6(a) and 6(b)). In the previous study, the QHJB was divided into north, middle (24�C27��), and south segments [36]. According to this, the Caledonian siliceous rocks had majority in the north and middle segments, whereas the major siliceous rocks were located in middle and south segments in Hercynian. In the published paper, the breakup of South China started from the north segment possibly due to the mantle plume with transfer in southwest direction [55], and the collisional matching also began from north segment extending in southwest direction [33].

Based on the aforementioned, a tensional setting agreed with the siliceous rocks developing in a larger scale relatively, whereas the compressional setting was adverse to the development of siliceous rocks. According to this, the diversities in spatial distribution of siliceous rocks came Brefeldin_A from the hysteresis on geological setting, which came from the passing of geological setting from north segment to south segment.