Arc-trench system

The changes in stress fields, and intensities of igneous and hydrothermal activities seem to correlate to oscillatory motion of the Pacific plate (Jackson s episodes) (Jackson et al., 1975 Jackson and Shaw, 1975) (Masuda, 1984). Masuda (1984) and Takeuchi (1987) pointed out that the oscillatory motion of Pacific plate during the least 42 Ma correlates with magmatism, the intensity of tectonism, the change of stress field and the history of sedimentary basin in arc-trench system (Fig. 1.147). The above arguments also suggest that the mineralizations in arc and back-arc systems relate to the oscillatory motion of the Pacific plate. 

Figure 1.165. Schematic diagram showing the effect of upwelling of asthenosphere beneath a continent which is adjacent to an arc-trench. system (Tatsumi et al., 1990).

Masuda, F. (1984) Sedimentary basins in arc-trench system as a high-sensitive recorder of oceanic plate motion. Mining Geology, 34, 1-20 (in Japanese). 

Mantovani E, Albarello D, Babbucci D, Tamburelli C, Viti M (2002) Trench-arc-backarc systems in the Mediterranean area examples of extrusion tectonics. J Virtual Explorer 8 131-147... 

Okinawa Trough, the Ryukyu island arc, and the Rjmkyu trench, it makes up another Trench-Arc-Basin system in the West Pacific Ocean, which links northwards with the Japanese island arc and connects southwards with the Taiwan-Philippine island arc. The northwest shelf cormects with the Yellow Sea and between them is the Changjiang River delta, with a water depth of about 50 100 m. 

Le Pichon X, Angelier J (1979) The Hellenic arc and trench system a key to the neotectonic evolutimi of... 

Figure 1. Locations of arc and back-arc systems for which helium isotope data are available (Note Italy is omitted). Trenches are marked by barbed lines (filled barbs = accretionary trenches open barbs = no accretionary prism). Modified from Von Huene and Scholl (1991).

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