Essays about: "planar deformation features"

Found 4 essays containing the words planar deformation features.

  1. 1. Electron Backscatter Diffraction (EBSD) Analysis and Predicted Physical Properties of Shocked Quartz from the Chicxulub Impact Crater, Mexico

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Erina Prastyani; [2022]
    Keywords : EBSD; SEM; shocked quartz; quartz; CPO; seismic velocity; anisotropy; Chicxulub; impact crater; pole figures; MTEX toolbox; microstructural features; planar deformation feature; planar fracture; feather features;

    Abstract : As one of the most common minerals in crustal rocks, quartz has been widely used as an indicator for shock metamorphism. Shocked quartz is found in the Chicxulub impact crater, an impact crater that has been linked to the Cretaceous-Tertiary extinction ~66 million years ago. READ MORE

  3. 2. A study of shock-metamorphic features in zircon from the Siljan impact structure, Sweden

    University essay from Lunds universitet/Geologiska institutionen

    Author : Josefin Martell; [2016]
    Keywords : Zircon; impacts; shock metamorphism; shock metamorphic features; planar deformation features; Siljan impact structure; Earth and Environmental Sciences;

    Abstract : Shock-metamorphic features such as planar deformation features (PDFs) and in some cases planar fractures (PFs) are widely used as impact-indicators when to confirm a suspected impact structure. These features only develop when exposed to a sudden and immense pressure and temperature increase in association with meteorite impacts. READ MORE

  4. 3. Microscopic shock-metamorphic features in crystalline bedrock : a comparison between shocked and unshocked granite from the Siljan impact structure

    University essay from Lunds universitet/Geologiska institutionen

    Author : Robert Mroczek; [2014]
    Keywords : impact structure; Siljan; planar deformation features; Earth and Environmental Sciences;

    Abstract : During the Devonian, 377 Ma ago, the Earth was impacted by a large celestial body, striking ground in the Siljan area in Dalarna, Sweden. The impact created what is today the largest confirmed impact structure in western Europe. Since its formation, the structure has however been heavily eroded, leaving no trace of the original crater. READ MORE

  5. 4. Traces of impact in crystalline rock : a summary of processes and products of shock metamorphism in crystalline rock with focus on planar deformation features in feldspars

    University essay from Lunds universitet/Geologiska institutionen

    Author : Fredrika Svahn; [2014]
    Keywords : Impacts; shock metamorphism; crater formation; shock metamorphic features; planar deformation features; alkali-feldspars; Siljan impact structure; Earth and Environmental Sciences;

    Abstract : Chockmetamorfa strukturer i alkalifältspater har genom studier i polarisationsmikroskop identi-fierats i graniter från Siljan- nedslagskrater. De mikroskopiska strukturer som observerats omfattas av; deformation bands, ladder textures, planar fractures, ”long deformation features", samt planar deformation features (PDFs). READ MORE