SGER: Ultramicrotomy for Petrographic Thin Sections

岩石薄片的超显微切割术Cheryl Young：EAR-0071152本项目将解决对岩石样品的标准化样品制备的需求，以便通过透射电子显微镜(TEM)进行研究；目前还没有通用的样品制备方法。超微切割法(UM)被广泛用于生物材料的切片，类似的方法也可应用于地质薄片。能够对岩相幻灯片进行薄切有几个优点。其中两个涉及到整体颗粒结构的保存和样品厚度的一致性。前者使研究晶界和界面的织构性质成为可能，而对其微观结构和岩相学的干扰最小。使用UM的方法，可以将单个10 mm的颗粒切成200个切片，几乎完全保留三维的内部微结构。该项目将导致开发能够从岩相片中产生超薄切片的超微切割方法。这将扩大透射电子显微镜在岩石学研究中的应用。

Ultramicrotomy for Petrographic Thin SectionsCheryl Young: EAR-0071152This project will address the need for standardized sample preparation of rock specimens for study by transmission electron microscopy (TEM); presently there is no universal method of sample preparation. Ultramicrotomy (UM) is widely used for sectioning biological materials and a similar procedure may be applied to geological thin sections. There are several advantages in being able to thin section petrographic slides. Two of these concern preservation of overall particle structure and uniformity of specimen thickness. The former makes it possible to examine textural properties of grain boundaries and interfaces with minimal disturbance to their microstructures and petrography. Using methods of UM it is possible to section a single 10-mm particle into 200 slices with almost complete preservation of internal microstructure in three dimensions. This project will result in the development of ultramictomy methods capable of producing ultrathin sections from petrographic slides. This will broaden the use the use of TEM in petrologic studies.