Abstract
Abstract Seventy‐seven spatially orientated, serial thin sections cut from a single rock reveal changes in the geometry of spiral‐shaped inclusion trails (SSITs) in garnet porphyroblasts. The observed SSITs are doubly curved, non‐cylindrical surfaces, with total inclusion‐trail curvature decreasing systematically from the cores to the rims of porphyroblasts. The three‐dimensional geometry of the SSITs, reconstructed with the aid of computer graphics, shows that the orientations of spiral axes defined by the SSITs are not related in any expected nor predictable way to the main foliation in the matrix. This suggests continued deformation after or during the latest stages of porphyroblast growth, which has important implications for the use of SSITs as shear‐sense indicators. Whether the formation of SSITs involves significant porphyroblast rotation with respect to a geographically fixed reference frame cannot be determined from the available data.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
