... active iron ==> 活性铁 active island arc ==> 活动岛弧 active isotope radio-graphy ==> 放射性同位素射线照相检验术 ...
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主要活动地区是太平洋西北边缘地震带和大洋岛弧地震带。
The main regions of seismic activities were the seismic belt of the northwest margin of the Pacific Ocean and the Oceanic island-arc seismic belt.
在高压超高压变质作用过程中所释放的流体对俯冲板块的演化起着重要作用，与岛弧岩浆活动有着直接联系。
Fluid released during the high pressure and ultrahigh pressure metamorphism plays an important role in the evolution of subducted slab and may connect directly with igneous activity in island arcs.
海槽玄武岩构造环境属于过渡洋中脊玄武岩 （张性 ）与岛弧玄武岩 （压性 ）之间 ，代表的仍是海槽早期的岩浆活动。
The tectonic settings of the basalts are transitional between MORB (tensile) and IAB (compressive), still representing the earlier stage of magma activities in the Okinawa Trough.
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