The current marginal sea and trench-arc-basin system of west Pacific is reformed by interaction of Pacific plate, Australian plate, and Eurasia plate in Cenozoic.
现今的西太平洋边缘海、沟弧盆体系，是新生代中晚期太平洋板块、澳大利亚板块与欧亚板块相互作用形成的。
During Middle Triassic, the Gejiu area was in a special sedimental environment, i. e. in a restricted marginal sea basin within the continental rift system.
中三叠世，个旧矿区处于特殊的沉积环境—陆裂谷系中的局限边缘海盆。
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