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Widmanstatten bands

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Journal Article
Published: 01 June 2011
Russ. Geol. Geophys. (2011) 52 (6): 620–630.
... and weighs 5.39 kg. Its surface is streamlined and features flow lines. One of the sides, probably that facing the flight direction, features regmaglypts and a sinuous cavern (9 × 1.5 cm). The meteorite consists of kamacite admixed with taenite. The inside of Widmanstätten bands is of complex kamacite...
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Journal Article
Published: 19 July 2024
American Mineralogist (2024)
... of galena-matildite, 187 we will refer hereafter to the (1) PbS-rich endmember as galenass (different from galena, which 188 occurs outside electrum-bearing bands), (2) AgBiS2-rich endmember as matilditess lamellae, and 189 (3) assemblages of both minerals as Widmanstätten textures. The host/lamella ratio...
Journal Article
Published: 01 February 2015
Jour. Geol. Soc. India (2015) 85 (2): 153–162.
.... This black plessite (formed at the lowest equilibrium temperature) is devoid of any central core of duplex plessite and is separated from Widmanstätten band forming early taenites with a distinct rim of high- Ni residual taenite. Fig.3 A rhombic crystal inclusion of daubreelite in kamacite matrix...
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Journal Article
Published: 01 November 2021
American Mineralogist (2021) 106 (11): 1828–1834.
... are shown by the pseudo-Widmanstätten pattern formed by perryite laths that show three prominent sets of lamellae that sub-divide the grains into trapezoidal regions, and the abundant Neumann bands. Light diffracting from the oriented Neumann bands and perryite produce a rainbow effect on the etched metal...
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Journal Article
Published: 01 March 1988
Jour. Geol. Soc. India (1988) 31 (3): 305–313.
... lamellae. Fig. 11. Goethite (grey) and lepidocrocite (white) form colloidal banding. a feature of opeD spaCe filling in titano-magnetite. Fig. 12. Maghemite (white) occurs as an unstable phase with martite (Mrt) in titano-magnetite. 310 K. L. CHAKRABORTY AND OTHERS widmanstatten' intergrowth...
Journal Article
Published: 01 July 2019
American Mineralogist (2019) 104 (7): 980–995.
... ( Griffiths et al. 2016 ). The apatite data set is the first of its kind, and reveals that apatite preferentially aligns its close-packed direction parallel to that of garnet ( c -axis apatite //<111> garnet ). We also recognize a rutile-garnet COR related to those in meteorites with Widmanstätten...
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Journal Article
Published: 01 April 2005
Earth Sciences History (2005) 24 (1): 63–80.
... or exchanges. Analyses of them, however, led to a state of great confusion. In Berlin, Rose examined the two Santa Rosa fragments he had obtained through Humboldt and a small (80 g) thin section of Rasgatá obtained from the Vienna Royal Imperial Museum. Rose could not observe a Widmanstätten structure...
FIGURES
Journal Article
Published: 28 September 2007
Canadian Journal of Earth Sciences (2007) 44 (9): 1333–1346.
... by reproducing exsolution textures of kamacite from taenite (Widmanstätten pattern) in the Toluca iron meteorite. Diffraction data obtained from single crystals (by the omega scan method) have enabled grain-by-grain correlation between unit cell (μXRD) and chemical composition (EPMA), as demonstrated...
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Journal Article
Journal: Elements
Published: 01 October 2018
Elements (2018) 14 (5): 360–361.
... of the Widmanstätten pattern and the fragmentation of the schreibersite. The Havana beads are chemically grouped with three North American iron meteorites: Anoka (Minnesota); Edmonton (Kentucky); and Carlton (Texas). Among these, Anoka was found as multiple masses on opposite sides of the Mississippi River...
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Journal Article
Published: 01 November 2021
Jour. Geol. Soc. India (2021) 97 (11): 1340–1346.
... as Banded Gneissic Complex (BGC). However, Gupta et al. (1997 ) redesignated the Archaean sequence as the Bhilwara Supergroup with three stratigraphic complexes having distinct metamorphic assemblages and sharp tectono-metamorphic boundaries. They are the Sandmata Complex (granulite facies), the Mangalwar...
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Journal Article
Published: 01 October 2012
Earth Sciences History (2012) 31 (2): 229–246.
.... Nininger (1887–1986) played a complex and controversial role in the recovery of the Goose Lake meteorite. In this photograph, taken some time after 1934, he is shown cutting a large meteorite with a band saw at the Colorado (now Denver) Museum of Natural History, where he held a staff position (Courtesy...
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Journal Article
Journal: Elements
Published: 01 June 2023
Elements (2023) 19 (3): 173–179.
... olivine in iron-nickel metal with hints of the Widmanstätten exsolution pattern. One of the most distant detections of olivine ever made is also one of the most primordial. Far infrared spectra reveal the presence of olivine in a debris disk around the bright, young star Beta Pictoris...
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Journal Article
Published: 01 October 1995
Jour. Geol. Soc. India (1995) 46 (4): 335–339.
... along the octahedral planes by ilmenite producing widmanstatten texture. Martitisation along the boundary of magnetite grains has been observed on the polished surfaces. Calcite, apatite, spherulite, phlogopite may sometimes occur as accessories. In the groundmass both augite and plagio...
Journal Article
Journal: Elements
Published: 01 February 2014
Elements (2014) 10 (1): 25–30.
... to A-class asteroids. ( C ) The Odessa differentiated iron meteorite showing the Widmanstätten pattern indicative of slow cooling; iron meteorites have been linked to M-class asteroids. ( D ) The Norton County aubrite, a high-temperature, highly reduced, differentiated meteorite; aubrites have been linked...
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Journal Article
Published: 01 May 2021
American Mineralogist (2021) 106 (5): 730–761.
...; exsolves from DA iron to form Widmanstätten patterns. 1,2,4,5,7 Tetrataenite (Fe,Ni) DA tetrataenite An ordered tetragonal ( P 4/ mmm ) phase of Fe-Ni 7,8 Awaruite (Ni 2 Fe to Ni 3 Fe) DA awaruite Forms thin layers that separate tetrataenite from kamacite in Widmanstätten patterns of some...
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Journal Article
Published: 01 June 2022
American Mineralogist (2022) 107 (6): 1190–1200.
.... At the beginning of the nineteenth century, F. Mohs published observations on the dissolution of rock salt and A. von Widmanstätten on the etching of iron meteorites. Daniell (1816) is credited with the first systematic investigation of crystal dissolution, noting that “the surface of a body is never equally...
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Journal Article
Published: 01 June 1998
Russ. Geol. Geophys. (1998) 39 (6): 718–740.
... globules in basalt glass. Light – monosulfide solid solution (MSS), enriched in Cu; compositionally different zones and minerals: fine (1 to 3 µ m) – crystals of magnetite; the bands correspond in composition to covellite (scanning microscope JEOL, mode of photographing COMPO). Fig. 3. A site...
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Journal Article
Published: 01 September 2023
American Mineralogist (2023) 108 (9): 1642–1657.
... as a tracer of crystal accumulation and transport, Middle Banded Series, Stillwater Complex, Montana . Tectonophysics , 629 , 123 – 137 , https://doi.org/10.1016/j.tecto.2014.03.028 . Shi , Z.-Z. , Dai , F.-Z. , Zhang , M. , Gu , X.-F. , and Zhang , W.-Z. ( 2013 ) Secondary...
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Journal Article
Published: 01 November 2008
American Mineralogist (2008) 93 (11-12): 1693–1720.
... mineralogy by the Eoarchean Era (~3.85–3.6 Ga), when large-scale surface mineral deposits, including banded iron formations, were precipitated under the influences of changing atmospheric and ocean chemistry. The Paleoproterozoic “Great Oxidation Event” (~2.2 to 2.0 Ga), when atmospheric oxygen may have...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.02
EISBN: 9781862395046
... described it in such detail that some Russian scientists are convinced that he did (Gallant 2002 , p. 121). Pallas described the bedrock of Mt Bolshoi Emir as grey schist locally banded with magnetite that showed no signs of having been worked as iron ore. There were no traces of ancient smelting...
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