publication . Article . 2015

Direct evidence of ancient shock metamorphism at the site of the 1908 Tunguska event

Paola Vannucchi; Christopher L. Andronicos; Damiano Della Lunga; Jason Phipps Morgan; W. Jason Morgan;
Open Access
  • Published: 01 Jan 2015
Abstract Shock metamorphism is rarely found at the surface of the Earth. The most used structures to identify shock metamorphism are “true Planar Deformation Features” (PDFs) in quartz, now accepted as diagnostic indicators of a meteorite impact. Here we present several lines of evidence for shock metamorphism and PDFs developed in quartz occurring on samples centered on a circular geological structure on Mount Stojkovic (60°54′06″N; 101°55′40″E), which lies within southern surface exposures of the Siberian Traps. The shock event appears to have occurred during the eruption of the surface Siberian Traps basalts that cover this region. Curiously, Mount Stojkovic ...
free text keywords: Siberian Traps, Meteorite, Shocked quartz, Shock metamorphism, Impact crater, Planar deformation features, Geology, Geochemistry, Impact structure, Verneshot, Paleontology
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