深俯冲陆壳内的两期熔融及其大地构造意义:来自北苏鲁地区浅色花岗岩中的证据

来源 :2016中国地球科学联合学术年会 | 被引量 : 0次 | 上传用户:nonstop_ma
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深熔作用贯穿碰撞造山带板片俯冲、折返及垮塌等重要演化阶段,对其深入研究有助于获取造山带根部的热演化信息,理解造山带内的岩浆活动、变质作用、壳幔相互作用、大陆生长及元素和物质的再循环过程.而造山带内超高压岩石内可能记录多期次部分熔融的深熔错石和岩石学证据,不仅可良好限定不同变质阶段部分熔融发生的时限,而且可通过对锆石和变质岩石学的详细研究反演深俯冲板片在不同阶段熔融程度、温压状态和熔融的物质来源等方面的差异,从而帮助建立深俯冲板片的演化轨迹并深入理解造山带演化过程。
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