FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2108250461> ?p ?o ?g. }

• W2108250461 endingPage "35" @default.
• W2108250461 startingPage "6" @default.
• W2108250461 abstract "Abstract— The occurrence of shock metamorphosed quartz is the most common petrographic criterion for the identification of terrestrial impact structures and lithologies. Its utility is due to its almost ubiquitous occurrence in terrestrial rocks, its overall stability and the fact that a variety of shock metamorphic effects, occurring over a range of shock pressures, have been well documented. These shock effects have been generally duplicated in shock recovery experiments and, thus, serve as shock pressure barometers. After reviewing the general character of shock effects in quartz, the differences between experimental and natural shock events and their potential effects on the shock metamorphism of quartz are explored. The short pulse lengths in experiments may account for the difficulty in synthesizing the high-pressure polymorphs, coesite and stishovite, compared to natural occurrences. In addition, post-shock thermal effects are possible in natural events, which can affect shock altered physical properties, such as refractive index, and cause annealing of shock damage and recrystallization. The orientations of planar microstructures, however, are unaffected by post-impact thermal events, except if quartz is recrystallized, and provide the best natural shock barometer in terms of utility and occurrence. The nature of planar microstructures, particularly planar deformation features (PDFs), is discussed in some detail and a scheme of variations in orientations with shock pressure is provided. The effect of post-impact events on PDFs is generally limited to annealing of the original glass lamellae to produce decorated PDFs, resulting from the exsolution of dissolved water during recrystallization. Basal (0001) PDFs differ from other PDF orientations in that they are multiple, mechanical Brazil twins, which are difficult to detect if not partially annealed and decorated. The occurrence and significance of shock metamorphosed quartz and its other phases (namely, coesite, stishovite, diaplectic glass and lechatelierite) are discussed for terrestrial impact structures in both crystalline (non-porous) and sedimentary (porous) targets. The bulk of past studies have dealt with crystalline targets, where variations in recorded shock pressure in quartz have been used to constrain aspects of the cratering process and to estimate crater dimensions at eroded structures. In sedimentary targets, the effect of pore space results in an inhomogeneous distribution in recorded shock pressure and temperature, which requires a different classification scheme for the variation of recorded shock compared to that in crystalline targets. This is discussed, along with examples of variations in the relative abundances of planar microstructures and their orientations, which are attributed to textural variations in sedimentary target rocks. Examples of the shock metamorphism of quartz in distal ejecta, such as at the K/T boundary, and from nuclear explosions are illustrated and are equivalent to that of known impact structures, except with respect to characteristics that are due to long-term, post-shock thermal effects. Finally, the differences between the deformation and phase transformation of quartz by shock and by endogenic, tectonic and volcanic processes are discussed. We confirm previous conclusions that they are completely dissimilar in character, due to the vastly different physical conditions and time scales typical for shock events, compared to tectonic and volcanic events. Well-characterized and documented shock effects in quartz are unequivocal indicators of impact in the natural environment." @default.
• W2108250461 created "2016-06-24" @default.
• W2108250461 creator A5001352130 @default.
• W2108250461 creator A5011656018 @default.
• W2108250461 creator A5031084988 @default.
• W2108250461 date "1996-01-01" @default.
• W2108250461 modified "2023-10-18" @default.
• W2108250461 title "Shock metamorphism of quartz in nature and experiment: II. Significance in geoscience*" @default.
• W2108250461 cites W1509664723 @default.
• W2108250461 cites W1527652757 @default.
• W2108250461 cites W1544614707 @default.
• W2108250461 cites W1648709359 @default.
• W2108250461 cites W1654112403 @default.
• W2108250461 cites W1963703066 @default.
• W2108250461 cites W1966432019 @default.
• W2108250461 cites W1966524326 @default.
• W2108250461 cites W1967768164 @default.
• W2108250461 cites W1968485005 @default.
• W2108250461 cites W1970640689 @default.
• W2108250461 cites W1970672371 @default.
• W2108250461 cites W1974181033 @default.
• W2108250461 cites W1974545927 @default.
• W2108250461 cites W1975412508 @default.
• W2108250461 cites W1977657589 @default.
• W2108250461 cites W1980897832 @default.
• W2108250461 cites W1981238025 @default.
• W2108250461 cites W1982738156 @default.
• W2108250461 cites W1984241839 @default.
• W2108250461 cites W1987789528 @default.
• W2108250461 cites W1989535012 @default.
• W2108250461 cites W1990848196 @default.
• W2108250461 cites W1992576276 @default.
• W2108250461 cites W1992635907 @default.
• W2108250461 cites W1994046797 @default.
• W2108250461 cites W1996639076 @default.
• W2108250461 cites W1998334218 @default.
• W2108250461 cites W2000764860 @default.
• W2108250461 cites W2002326693 @default.
• W2108250461 cites W2004157714 @default.
• W2108250461 cites W2004576876 @default.
• W2108250461 cites W2006039768 @default.
• W2108250461 cites W2006408548 @default.
• W2108250461 cites W2007044484 @default.
• W2108250461 cites W2007576219 @default.
• W2108250461 cites W2007589751 @default.
• W2108250461 cites W2008065679 @default.
• W2108250461 cites W2011168908 @default.
• W2108250461 cites W2011916250 @default.
• W2108250461 cites W2012292189 @default.
• W2108250461 cites W2013534382 @default.
• W2108250461 cites W2016653107 @default.
• W2108250461 cites W2016884315 @default.
• W2108250461 cites W2019737616 @default.
• W2108250461 cites W2023584231 @default.
• W2108250461 cites W2025394502 @default.
• W2108250461 cites W2030911183 @default.
• W2108250461 cites W2032771883 @default.
• W2108250461 cites W2033585465 @default.
• W2108250461 cites W2035730625 @default.
• W2108250461 cites W2038079442 @default.
• W2108250461 cites W2038487387 @default.
• W2108250461 cites W2039620705 @default.
• W2108250461 cites W2042110177 @default.
• W2108250461 cites W2044988174 @default.
• W2108250461 cites W2045839712 @default.
• W2108250461 cites W2047417409 @default.
• W2108250461 cites W2048474951 @default.
• W2108250461 cites W2048813624 @default.
• W2108250461 cites W2049574285 @default.
• W2108250461 cites W2050079883 @default.
• W2108250461 cites W2053640089 @default.
• W2108250461 cites W2053848315 @default.
• W2108250461 cites W2054343501 @default.
• W2108250461 cites W2055804346 @default.
• W2108250461 cites W2057721795 @default.
• W2108250461 cites W2061236697 @default.
• W2108250461 cites W2062585359 @default.
• W2108250461 cites W2066268236 @default.
• W2108250461 cites W2069651486 @default.
• W2108250461 cites W2070648188 @default.
• W2108250461 cites W2070920813 @default.
• W2108250461 cites W2071600680 @default.
• W2108250461 cites W2071605128 @default.
• W2108250461 cites W2071848403 @default.
• W2108250461 cites W2073164369 @default.
• W2108250461 cites W2075240417 @default.
• W2108250461 cites W2079082851 @default.
• W2108250461 cites W2081266067 @default.
• W2108250461 cites W2082668070 @default.
• W2108250461 cites W2085937563 @default.
• W2108250461 cites W2087387336 @default.
• W2108250461 cites W2088267968 @default.
• W2108250461 cites W2090225449 @default.
• W2108250461 cites W2090620625 @default.
• W2108250461 cites W2091911700 @default.
• W2108250461 cites W2092342466 @default.
• W2108250461 cites W2094223003 @default.
• W2108250461 cites W2094574167 @default.

• next