Synchrotron Data - Gazley 9645 (Sep 2016) - Trace element distribution in the world's youngest eclogites

Fluid-mediated trace element redistribution in subduction zones is a key aspect of element cycling in the Earth. The depths at which fluid migration episodes occur, and the fluid compositions involved are poorly understood. Eclogite rocks from Papua New Guinea uniquely preserve, without overprinting, a physical and chemical record of their journey to mantle depths (>100 km) and back to the Earth’s surface. They record fluid flow as a zone of trace element enrichment just before exhumation. Mapping the distributions of key elements by X-ray fluorescence microscopy will clarify understanding of element redistributions that accompany early exhumation from mantle depths.\nLineage: Data was produced using the Maia 384 element detector array on the XFM X-ray microprobe beamline of the Australian Synchrotron and processed using the GeoPIXE software package.

俯冲带内流体介导的微量元素再分配，是地球元素循环的关键环节之一。目前学界对流体运移事件发生的深度以及所涉及的流体组分仍知之甚少。产自巴布亚新几内亚的榴辉岩未受后期地质叠加改造，独特留存了其向地幔深度（＞100公里）运移并返回地球表面的完整物理与化学记录，同时记录了折返前夕流体流动形成的微量元素富集带。借助X射线荧光显微术（X-ray fluorescence microscopy）绘制关键元素的空间分布图谱，将有助于阐明地幔深度早期折返过程中伴随的元素再分配机制。
数据溯源：本数据集采用澳大利亚同步加速器的XFM X射线微探针光束线配套的Maia 384元素探测器阵列采集数据，并通过GeoPIXE软件包完成处理。