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南极西部裂谷区是地球上最大的陆壳扩展地区之一,其面积与美国西部盆—山区(Basinand Range)及东非裂谷区相当(Behrendt 等,1991;tessensohm 和 Worner, 1991)。南极西部裂谷体系是南极两个主要构造区之一,另一个是南极东部克拉通地区(图 1)。南极西部裂谷体系与相对稳定的
The western Antarctic Rift Valley is one of the largest crustal extensions on Earth with areas comparable to the Basinand Range and the East African Rift Valley (Behrendt et al., 1991; tessensohm and Worner, 1991). The Antarctic western rift system is one of the two main tectonic zones in the Antarctic and the other is the craton in the eastern Antarctica (Figure 1). Antarctic western rift system and relatively stable