Journal ArticleDOI
Shock metamorphism of quartz in nature and experiment: I. Basic observation and theory*
TLDR
In this paper, the current status of knowledge about the nature, origin, and experimental pressure-temperature calibration of shock-induced deformations and phase transformations is reviewed for natural and experimental shock conditions.Abstract:
— Quartz, as a ubiquitous mineral constituent of the Earth's crust, displays the greatest variety of well-defined residual shock effects among all rock-forming minerals. It represents an important and most reliable shock barometer and thermometer for terrestrial impact formations. In this paper, the current status of knowledge about the nature, origin, and experimental pressure-temperature calibration of shock-induced deformations and phase transformations is reviewed for natural and experimental shock conditions.read more
Citations
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Book
Traces of Catastrophe: A Handbook of Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures
TL;DR: In this article, a handbook of shock-metamorphic effects in Terrestrial Meteorite Impact Structures emphasizes terrestrial impact structures, field geology, and particularly the recognition and petrographic study of shockmetric effects in terrestrial rocks.
Journal ArticleDOI
The convincing identification of terrestrial meteorite impact structures: What works, what doesn't, and why
TL;DR: A detailed review of the impact detection methods can be found in this article, with the best diagnostic indicators for shock metamorphism being features that can be studied easily by using the polarizing microscope, such as planar microdeformation features (PFs), isotropization (e.g., formation of diaplectic glasses), and phase changes (high pressure phases; melting).
Journal ArticleDOI
Shock metamorphism of quartz in nature and experiment: II. Significance in geoscience*
TL;DR: In this article, the authors explored the differences between experimental and natural shock events and their potential effects on the shock metamorphism of quartz, and showed that planar deformation features (PDFs) 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.
Journal ArticleDOI
Cratering History and Lunar Chronology
Dieter Stöffler,Graham Ryder,Boris A. Ivanov,Natalia Artemieva,M. J. Cintala,Richard A. F. Grieve +5 more
TL;DR: In this paper, the authors review the presently available data sets in support of this paradigmatic assumption, as follows: (1) the phenomenology of lunar impact craters, (2) the terrestrial record of the impact cratering process and the interpretation of terrestrial impactites as far as this “ground truth” is relevant for the interpretation, and (3) the theory and numerical simulation of the cratering processes and the characteristics of the Earth-Moon crossing population of impactors (asteroids and comets), the principles of relative age dating of lunar surface units and the
Journal ArticleDOI
A 2.023 Ga age for the Vredefort impact event and a first report of shock metamorphosed zircons in pseudotachylitic breccias and Granophyre
TL;DR: U Pb isotope systematics of shock metamorphosed zircon grains from pseudotachylitic breccias and Granophyre from the controversial Vredefort Structure, South Africa, provide new and compelling evidence for an impact origin for this structure as mentioned in this paper.
References
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Journal ArticleDOI
Shock-Wave Compression of Quartz
TL;DR: In this article, high explosive driving systems and high speed optical techniques have been used to investigate the compressional behavior of xcut, ycut, and zcut quartz crystals and fused quartz up to about 750 kbar pressure.
Journal ArticleDOI
Pressure-induced amorphization of crystalline silica
TL;DR: In this paper, in situ synchrotron X-ray diffraction measurements of α-quartz and coesite in a diamond-anvil cell were performed to demonstrate that these crystalline materials transform to amorphous solids at 25-35 GPa and 300 K. The results of these measurements provide constraints on the equations of state and melting relations in this system at high pressures, shed light on the mechanism for glass formation in SiO2 in laboratory shock-wave experiments and meteorite-impact events, and provide insights into the thermoelastic stability
Book ChapterDOI
Equation of State
TL;DR: The use of plane shock waves to determine the equations of state of condensed materials to very high pressure began in 1955 with the classic papers of Walsh and Christian (1955) and Bancroft et al. (1956) as mentioned in this paper.
Journal ArticleDOI
Equation of state of metals from shock wave measurements
TL;DR: In this paper, a photographic technique for the nearly simultaneous determination of shock and free surface velocities is presented, and measurements for aluminum, copper, and zinc are given, respectively.
Journal ArticleDOI
Quartz: Anomalous Weakness of Synthetic Crystals.
David Griggs,J. D. Blacic +1 more
TL;DR: The strength of a synthetic quartz crystal drops rapidly at 400�C, and at 600�C is a hundredfold lower than at 300�C; large plastic deformations can be produced without fracture.