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reidite

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Journal Article
Journal: Geology
Published: 07 October 2020
Geology (2021) 49 (2): 201–205.
...Aaron J. Cavosie; Marc B. Biren; Kip V. Hodges; Jo-Anne Wartho; J. Wright Horton, Jr.; Christian Koeberl Abstract High-pressure minerals provide records of processes not normally preserved in Earth’s crust. Reidite, a quenchable polymorph of zircon, forms at pressures >20 GPa during shock...
FIGURES | View All (4)
Journal Article
Published: 01 June 2019
American Mineralogist (2019) 104 (6): 830–837.
...Claudia Stangarone; Ross J. Angel; Mauro Prencipe; Boriana Mihailova; Matteo Alvaro Abstract The structure, the elastic properties, and the Raman frequencies of the zircon and reidite polymorphs of ZrSiO 4 were calculated as a function of hydrostatic pressure up to 30 GPa using HF/DFT ab initio...
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Journal Article
Published: 22 May 2019
Mineralogical Magazine (2019) 83 (4): 561–567.
...Makoto Tokuda; Akira Yoshiasa; Hiroshi Kojitani; Saki Hashimoto; Seiichiro Uehara; Tsutomu Mashimo; Tsubasa Tobase; Masaki Akaogi Abstract Single crystals of synthetic reidite and natural radiation-damaged zircon from Okueyama, Japan were investigated using X-ray diffraction. The pressure-induced...
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Journal Article
Journal: Geology
Published: 01 May 2019
Geology (2019) 47 (5): e465.
Journal Article
Journal: Geology
Published: 01 May 2019
Geology (2019) 47 (5): e466.
Journal Article
Journal: Geology
Published: 27 September 2018
Geology (2018) 46 (11): 983–986.
... in zircon from a central uplift. We report both shock twins and reidite, the high-pressure ZrSiO 4 polymorph, in zircon from shocked granitic gneiss drilled from the center of the >60-km-diameter Woodleigh impact structure in Western Australia. The key observation is that in zircon grains that contain...
FIGURES
Journal Article
Journal: Geology
Published: 20 December 2017
Geology (2018) 46 (3): 203–206.
... of the source crater. The former presence of reidite, a high-pressure polymorph of zircon, was detected in granular zircon grains within Muong Nong–type tektites from Thailand. The zircon grains are surrounded by tektite glass and are composed of micrometer-sized neoblasts that contain inclusions of ZrO 2...
FIGURES
Journal Article
Journal: Geology
Published: 01 September 2016
Geology (2016) 44 (9): 703–706.
... that each grain consists of multiple domains, some with boundaries disoriented by 65° around <110>, a known {112} shock-twin orientation. Other domains have {001} in alignment with {110} of neighboring domains, consistent with the former presence of the high-pressure ZrSiO 4 polymorph reidite...
Journal Article
Journal: Geology
Published: 01 October 2015
Geology (2015) 43 (10): 899–902.
... tectonics, erosion, and deposition of younger rocks that may destroy or cover the evidence. Here we report the first Precambrian occurrence of the rare mineral reidite (ZrSiO 4 ) within grains of shocked zircon in the ca. 1.18 Ga Stac Fada Member (Stoer Group), northwestern Scotland. The reidite, preserved...
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Journal Article
Journal: Geology
Published: 01 April 2015
Geology (2015) 43 (4): 315–318.
..., and above 20 GPa transforms to reidite, a high-pressure ZrSiO 4 polymorph diagnostic of impact. However, the utility of reidite has been limited by its occurrence; it has only been reported from three relatively young (<36 Ma) impact craters globally. Here we report a new occurrence of reidite...
FIGURES
Journal Article
Published: 01 January 2004
American Mineralogist (2004) 89 (1): 197–203.
... volume V 0 = 260.89 ± 0.03 Å 3 , when (∂ K T 0 /∂ P ) T = K ′ T 0 is fixed at 4. This bulk modulus is over 12% lower than that suggested by earlier measurements using impure, natural zircon sample. In addition, we observed the start of the transformation of zircon to reidite (scheelite-structured ZrSiO...
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Journal Article
Published: 01 November 2003
American Mineralogist (2003) 88 (11-12): 1663–1667.
...Ian Farnan; Etienne Balan; Chris J. Pickard; Francesco Mauri Abstract Periodic density functional theory (DFT) was used to calculate the structure of zircon (ZrSiO 4 ) and reidite (scheelite polymorph of ZrSiO 4 ) at pressures from 0-41 GPa. Subsequently, the 29Si nuclear magnetic resonance (NMR...
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Journal Article
Published: 01 April 2002
American Mineralogist (2002) 87 (4): 562–565.
...Billy P. Glass; Shaobin Liu; Peter B. Leavens Abstract Reidite is a high-pressure polymorph of zircon with the scheelite structure. It has been found in an upper Eocene impact ejecta layer in marine sediments on the upper continental slope off New Jersey and on Barbados. Reidite occurs (epitaxially...
FIGURES
Image
Two-stage model of <span class="search-highlight">reidite</span> formation. (A) Pre-impact zircon with randomly o...
Published: 07 October 2020
Figure 4. Two-stage model of reidite formation. (A) Pre-impact zircon with randomly oriented dislocations. (B) Formation of lamellar reidite network by shearing at pressures >40 GPa during shock compression. Defect concentrations accumulate adjacent to reidite lamellae. (C) Detail of area
Image
Dendritic <span class="search-highlight">reidite</span> (insets from  Fig. 2A ). (A) <span class="search-highlight">Reidite</span> dendrites growing ep...
Published: 07 October 2020
Figure 3. Dendritic reidite (insets from Fig. 2A ). (A) Reidite dendrites growing epitaxially from discrete reidite lamellae. Arrow indicates “sawtooth” boundaries described in the text. (B) Dendritic reidite forming fan-like masses, unassociated with lamellae visible on the polished section.
Image
Comparison of SiO 4  configurations between zircon (Kolesov,  et al. ,  200...
Published: 22 May 2019
Fig. 2. Comparison of SiO 4 configurations between zircon (Kolesov, et al. , 2001 ) and reidite projected on (100) reidite ( a ) and (010) reidite ( b ). The grey and black tetrahedra correspond to the SiO 4 of zircon and reidite, respectively.
Image
Features of <span class="search-highlight">reidite</span> lamellae, shock twins, and “former <span class="search-highlight">reidite</span> in granular ...
Published: 05 April 2021
Figure 3. Features of reidite lamellae, shock twins, and “former reidite in granular neoblastic” (FRIGN) zircon. (A) Reidite- and microtwin-bearing zircon from granodiorite clast (715.9 m below seafloor [mbsf], grain 2). Z-h— zircon host; Z-t—zircon twins; R1, R2—reidite; BC—band contrast; IPF
Image
Images and crystallographic data of <span class="search-highlight">reidite</span>-bearing zircon grain 9 (shown i...
Published: 01 April 2015
Figure 3. Images and crystallographic data of reidite-bearing zircon grain 9 (shown in Fig. 2B ), Rock Elm breccia sample 13RE07. A: Atomic number contrast image. White box shows area shown in B. B: Detail of A showing (i) lamellar reidite, (ii) nano-granular reidite in voids, and (iii) nano
Image
Scanning electron microscopy images of the studied <span class="search-highlight">reidite</span> grain from Ocean...
Published: 07 October 2020
Figure 2. Scanning electron microscopy images of the studied reidite grain from Ocean Drilling Program (ODP) Site 1073 Hole A. (A) Backscattered electron image (BSE) showing dense network of planar features; large inset (below) shows five orientations of lamellae. (B) Cathodoluminescence (CL
Image
Birch-Murnaghan equations of state for zircon and <span class="search-highlight">reidite</span> (dashed lines). S...
Published: 01 January 2004
F igure 5. Birch-Murnaghan equations of state for zircon and reidite (dashed lines). Symbols are as follows: solid squares, zircon; solid circles, reidite.