High-pressure metamorphic rocks form during subduction of Earth's crust to mantle depths at convergentplate margins.
高压变质岩是在俯冲的过程中形成的，从地壳到地幔，深度不等的聚合板块边缘。
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Figure 5. The Philippines orogen (black outline with cross-hatching) surrounds the Philippine Sea (PS) - Sunda (SU) convergentplate boundary (heavy colored lines).
图5。菲律宾造山带（孵化的黑色边框与交叉）环绕菲律宾海（注） -巽他（苏）会聚板块边界（重色线）。
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In this paper, facing the convergent problem of plastic forming using large incremental step, we deduced the iterative formula used in analysis of elastic-plastic plate forming finite element method.