ROW: Oxygen and Hydrogen Isotope Systematics of Mylonites

本研究旨在研究从富流体到缺流体的三个主要剪切带中化石流体-岩石的相互作用。结合同位素和岩石学研究将用于构造地壳剪切带内流体运动的模型。特别是，蚀变岩中矿物成分的微观采样将与激光微探针技术相结合，以表征有关蚀变带和变形结构的精细尺度同位素变化。与J. R. O'Neil博士（U. Michigan）密切合作，将向PI介绍激光微探针技术和氢同位素地球化学，这将允许将该技术转移到她的家乡机构（根据ROW目标）。与A. K. Sinha博士（VPI）和Carol Simpson博士（约翰霍普金斯大学）的进一步合作将促进稳定同位素工作与放射性成因同位素和结构数据的整合。总之，这些研究方向旨在提供流体流动的时间限制以及与造岩矿物相互作用的程度。

This proposal aims to investigate fossil fluid-rock interactions in three major shear zones which range from fluid- rich to fluid-starved conditions. Combined isotopic and petrographic studies will be used to construct a model of fluid movement within crustal shear zones. In particular, micro- sampling of mineral components in the altered rocks will be combined with laser microprobe techniques to characterize fine- scale isotopic variations with respect to alteration zones and deformation structures. Close collaboration with Dr. J. R. O'Neil (U. Michigan) will introduce the PI to the laser microprobe technology and hydrogen isotope geochemistry which will allow transferral of this technology to her home institution (as per ROW objectives). Additional collaboration with Dr. A. K. Sinha (VPI) and Dr. Carol Simpson (John Hopkins Univ.) will facilitate integration of the stable isotopic work with radiogenic isotope and structural data. Together, these lines of research are intended to provide constraints on timing of fluid flow and extent of interaction with rock-forming minerals.