From mantle to crust and exosphere in volcanic arcs

该研究项目旨在了解两个构造板块碰撞（弧或会聚边缘）环境中幔源岩浆和岩石圈的形成和演化。研究的重点是地幔，地壳和大气之间的流体和金属的分配过程中，岩浆从地幔源区的出口，在弧火山喷发，他们脱气到大气中。研究工作力求了解关键金属（Fe、Cu、Re、As、Sb、In、Sn、W）在弧岩浆上升、就位和冷却过程中的分布和地球化学行为，并以系统的高压-温度实验为基础：（a）作为氧逸度（fO 2）函数的地幔熔融，和（B）原始弧源岩浆中的流体/熔体/晶体分配。一些实验数据进行了比较，与正在进行的现场研究中的侏罗纪时代的弧壳暴露在斜截面温哥华岛，不列颠哥伦比亚省的中上地壳火成岩。

This research program is directed at understanding the formation and evolution of mantle-derived magmas and lithosphere in settings where two tectonic plates collide (arcs or convergent margins). The research focuses on the partition of fluid and metals between mantle, crust and atmosphere during the egress of magmas from their mantle source regions to eruptions in arc volcanoes where they degas into the atmosphere. The research effort seeks to understand the distribution and geochemical behaviour of key metals (Fe, Cu, Re, As, Sb, In, Sn, W) during the ascent, emplacement and cooling of arc magma, and is underpinned by systematic high pressure-temperature experimentation on: (a) mantle melting as a function of oxygen fugacity (fO2), and (b) fluid/melt/crystal partitioning in primitive arc-derived magmas. Some of the experimental data are compared with an ongoing field study of mid-upper crustal igneous rocks in Jurassic-aged arc crust exposed in oblique section on Vancouver Island, B.C.