An Ion and Electron Microprobe Study of Apatite in the Red Hill Complex, New Hampshire

首席研究员将研究碱性环脉复合体的起源，特别是共存的硅不饱和和硅饱和正长岩之间的关系。人们的注意力将集中在新罕布什尔州的红山复合体上，特别是矿物磷灰石，磷灰石是最早结晶的阶段之一，最有可能保存这些岩石早期历史的信息。基性包裹体中磷灰石稀土元素组成与寄主正长岩稀土元素组成的关系将作为主要的研究技术。这项研究将确定这种方法在确定包裹体和寄主岩石之间的亲缘关系方面是否有用，并可能为研究此类岩石中液体下降的早期阶段提供重要工具。

The principal investigator will study the origin of alkaline ring-dike complexes, and in particular the relationship between coexisting silica-undersaturated and silica-saturated syenites. Attention will be focused on the Red hill complex in New Hampshire, specifically on the mineral apatite, which as one of the first phases to crystallize most likely preserves information about the early history of these rocks. The relationship between rare earth element compositions of apatite in mafic enclaves to those in host syenites will be used as the primary investigative technique. The research will determine whether this approach is a useful one in establishing consanguinity between the enclaves and the host rocks, and may provide an important tool in investigating the very early stages of liquid descent in such rocks.