Asymmetric shock deformation at the Spider impact structure, Western Australia

2021 ◽  
Author(s):  
Morgan A. Cox ◽  
Aaron J. Cavosie ◽  
Michael H. Poelchau ◽  
Thomas Kenkmann ◽  
Katarina Miljković ◽  
...  
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
Shock Deformation ◽  
Asymmetric Shock

Shock deformation microstructures in xenotime from the Spider impact structure, Western Australia

2021 ◽  
Author(s):  
Morgan A. Cox ◽  
Aaron J. Cavosie ◽  
Michael Poelchau ◽  
Thomas Kenkmann ◽  
Phil A. Bland ◽  
...  
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
High Angle ◽  
Deformation Bands ◽  
Stress Regime ◽  
Shock Deformation ◽  
Deformation Twins ◽  
Formation Conditions ◽  
Shatter Cones ◽  
Micro Structures

ABSTRACT The rare earth element–bearing phosphate xenotime (YPO4) is isostructural with zircon, and therefore it has been predicted that xenotime forms similar shock deformation microstructures. However, systematic characterization of the range of micro structures that form in xenotime has not been conducted previously. Here, we report a study of 25 xenotime grains from 10 shatter cones in silicified sandstone from the Spider impact structure in Western Australia. We used electron backscatter diffrac tion (EBSD) in order to characterize deformation and microstructures within xenotime. The studied grains preserve multiple sets of planar fractures, lamellar {112} deformation twins, high-angle planar deformation bands (PDBs), partially recrystallized domains, and pre-impact polycrystalline grains. Pressure estimates from micro structures in coexisting minerals (quartz and zircon) allow some broad empirical constraints on formation conditions of ~10–20 GPa to be placed on the observed microstructures in xenotime; at present, more precise formation conditions are unavailable due to the absence of experimental constraints. Results from this study indicate that the most promising microstructures in xenotime for recording shock deformation are lamellar {112} twins, polycrystalline grains, and high-angle PDBs. The {112} deformation twins in xenotime are likely to be a diagnostic shock indicator, but they may require a different stress regime than that of {112} twinning in zircon. Likewise, polycrystalline grains are suggestive of impact-induced thermal recrystallization; however, in contrast to zircon, the impact-generated polycrystalline xenotime grains here appear to have formed in the solid state, and, in some cases, they may be difficult to distinguish from diagenetic xenotime with broadly similar textures.

Clay mineralogical, geochemical and isotopic tracing of the evolution of the Woodleigh impact structure, Southern Carnarvon Basin, Western Australia

2005 ◽  
Vol 149 (5) ◽  
pp. 576-590 ◽  
Author(s):  
I. Tonguç Uysal ◽  
Arthur J. Mory ◽  
Suzanne D. Golding ◽  
Robert Bolhar ◽  
Kenneth D. Collerson
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
Isotopic Tracing ◽  
Carnarvon Basin

scholarly journals Precise radiometric age establishes Yarrabubba, Western Australia, as Earth’s oldest recognised meteorite impact structure

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Timmons M. Erickson ◽  
Christopher L. Kirkland ◽  
Nicholas E. Timms ◽  
Aaron J. Cavosie ◽  
Thomas M. Davison
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
Meteorite Impact

Woodleigh, Southern Carnarvon Basin, Western Australia: history of discovery, Late Devonian age, and geophysical and morphometric evidence for a 120 km-diameter impact structure

2005 ◽  
Vol 52 (4-5) ◽  
pp. 545-553 ◽  
Author(s):  
A. Y. Glikson ◽  
A. J. Mory ◽  
R. P. Iasky ◽  
F. Pirajno ◽  
S. D. Golding ◽  
...  
Keyword(s):  
Western Australia ◽  
Late Devonian ◽  
Impact Structure ◽  
History Of ◽  
Devonian Age ◽  
Carnarvon Basin

scholarly journals Variations in shock deformation at the Slate Islands Impact Structure, Lake Superior, Canada

1977 ◽  
Vol 61 (1) ◽  
pp. 107-107 ◽  
Author(s):  
R. A. F. Grieve ◽  
P. B. Robertson
Keyword(s):  
Lake Superior ◽  
Impact Structure ◽  
Shock Deformation

Variations in shock deformation at the Slate Islands impact structure, Lake Superior, Canada

1976 ◽  
Vol 58 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Richard A. F. Grieve ◽  
P. Blyth Robertson
Keyword(s):  
Lake Superior ◽  
Impact Structure ◽  
Shock Deformation

Modelling Source Depth and Possible Origin of Magnetic Anomalies Associated with the Yallalie Impact Structure, Perth Basin, Western Australia

2006 ◽  
Vol 37 (2) ◽  
pp. 191-196 ◽  
Author(s):  
P.J. Hawke ◽  
A.J. Buckingham ◽  
M.C. Dentith
Keyword(s):  
Western Australia ◽  
Magnetic Anomalies ◽  
Impact Structure ◽  
Source Depth

Yarrabubba - a large, deeply eroded impact structure in the Yilgarn Craton, Western Australia

2003 ◽  
Vol 213 (3-4) ◽  
pp. 235-247 ◽  
Author(s):  
Francis A. Macdonald ◽  
John A. Bunting ◽  
Sara E. Cina
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
Yilgarn Craton

Shocked quartz in polymict impact breccia from the Upper Cretaceous Yallalie impact structure in Western Australia

2019 ◽  
Vol 54 (3) ◽  
pp. 621-637 ◽  
Author(s):  
Morgan A. Cox ◽  
Aaron J. Cavosie ◽  
Ludovic Ferrière ◽  
Nicholas E. Timms ◽  
Phil A. Bland ◽  
...  
Keyword(s):  
Western Australia ◽  
Upper Cretaceous ◽  
Impact Structure ◽  
Shocked Quartz

scholarly journals Clay mineralogical, geochemical and isotopic tracing of the evolution of the Woodleigh impact structure, Southern Carnarvon Basin, Western Australia

2005 ◽  
Vol 150 (6) ◽  
pp. 671-672
Author(s):  
I. Tonguç Uysal ◽  
Arthur J. Mory ◽  
Suzanne D. Golding ◽  
Robert Bolhar ◽  
Kenneth D. Collerson
Keyword(s):  
Western Australia ◽  
Impact Structure ◽  
Isotopic Tracing ◽  
Carnarvon Basin
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