Tourmaline in Metamorphic Rocks: Polar Asymmetry, Episodic Growth and Petrogenesis

9405747亨利拟议的研究将解决的作用，旅游作为一个监测的变质历史的岩石中，它发生。 本研究有三个岩石学和地球化学目标：（1）评估地球的极地性质的后果和意义-这可能使人们了解受表面能量效应影响的元素分配，（2）变质环境中B的零星释放及其对旅游植物生长的意义;这对于理解火成岩和变质岩中的B旋回至关重要，（3）确立了变质流体作用下高级变质岩中电气石的发育或丧失的意义-这可以阐明流体的化学性质，因为它与矿物化学和结构有关。 将研究来自西北缅因州的变质样品。 这项研究将需要对电气石进行电子和离子探针分析。

9405747 Henry The proposed research will address the role of tourmaline as a monitor of the metamorphic history of the rocks in which it occurs. The study has three petrologic and geochemical objectives: (1) evaluation of consequences and significance of the polar nature of tourmaline - which may give insights into element partitioning as influenced by surface energy effects, (2) investigation of the sporadic release of B in metamorphic environments and its significance to tourmaline growth - which will be critical in understanding the B cycle in igneous and metamorphic rocks, and (3) establishment of the significance of development or loss of tourmaline in high grade metamorphic rocks due to metamorphic fluids - which may elucidate the chemistry of fluids as it related to mineral chemistry and texture. Metamorphic samples from NW Maine will be studied. The research will require electron and ion probe analyses of tourmaline.