ROW: Oxygen and Hydrogen Isotope Systematics of Mylonites

这项提议旨在研究从富含流体到缺乏流体的三个主要剪切带中的化石流体-岩石相互作用。将结合同位素和岩石学研究来建立地壳剪切带内流体运动的模型。特别是，蚀变岩石中矿物成分的微量取样将与激光显微探测技术相结合，以表征蚀变带和变形结构的精细同位素变化。与J.R.O‘Neil博士(美国密歇根大学)的密切合作将向PI介绍激光微探针技术和氢同位素地球化学，这将使这项技术能够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)的其他合作将促进稳定同位素工作与放射性同位素和结构数据的整合。总而言之，这些研究旨在对流体流动的时间和与岩石形成矿物的相互作用程度提供限制。

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.