Evidence Of Earth Catastrophe By Anomalous Shocked Quartz At The Kit Boundary

1992 ◽  
pp. 249-253
Author(s):  
Yasunori Miura ◽  
Toshio Kato ◽  
Masashi Imai
Keyword(s):  
Shocked Quartz

scholarly journals Fast deformation of shocked quartz and implications for planar deformation features observed in shocked quartz

2020 ◽  
Author(s):  
Toshimori Sekine ◽  
Tomoko Sato ◽  
Norimasa Ozaki ◽  
Kohei Miyanishi ◽  
Ryosuke Kodama ◽  
...  
Keyword(s):  
Planar Deformation ◽  
Deformation Features ◽  
Shocked Quartz ◽  
Planar Deformation Features

Shocked quartz and other mineral inclusions in Australasian microtektites

Geology ◽  
2010 ◽  
Vol 38 (3) ◽  
pp. 211-214 ◽  
Author(s):  
L. Folco ◽  
N. Perchiazzi ◽  
M. D'Orazio ◽  
M.L. Frezzotti ◽  
B.P. Glass ◽  
...  
Keyword(s):  
Mineral Inclusions ◽  
Shocked Quartz

Clay mineral alteration associated with meteorite impact in the marine environment (Barents Sea)

Clay Minerals ◽  
1998 ◽  
Vol 33 (1) ◽  
pp. 51-64 ◽  
Author(s):  
H. Dypvik ◽  
R. E. Ferrell
Keyword(s):  
Clay Mineral ◽  
Barents Sea ◽  
Volcanic Glass ◽  
Circulation Patterns ◽  
Shelf Sediments ◽  
Ejecta Blanket ◽  
Shocked Quartz ◽  
Mineral Alteration ◽  
The Impact ◽  
Current Circulation

AbstractMore than 50 samples from a Barents Sea borehole near the Mjolnir Structure (an extraterrestrial impact feature) were used to investigate changes in the clay assemblage associated with the submarine impact. Seismic evidence, the presence of shocked quartz and a prominent Ir anomaly restricted the potential impact affected zone to a 10 m interval, straddling the Jurassic/Cretaceous boundary.Increased abundance (up to 30 wt%) of a smectite, a randomly interstratified smectite-illite with 85% smectite layers, forms the basis for a two-layer oceanic impact clay model that differs from published terrestrial cases. The smectite is assumed to represent seawater-altered impact glass from the ejecta blanket material that was mixed with resuspended shelf sediments by the collision generated waves. The smectite-rich interval is almost 5 m thick. It is overlain by a coarser unit (~2 m thick) containing abundant smectite, shocked quartz grains, and anomalous Ix contents at its base. The smectite-rich interval may have originated as a density/turbidity current, generated by the impact and the collapse and erosion of the crater rim. Seawater alteration of volcanic glass and changes in the tectonic regime of the provenance area, or changing oceanic current circulation patterns could produce similar variations in the clay mineral assemblage. The most compelling evidence for the possible impact derivation of this clay assemblage is the direct association with the Mjolnir Impact Structure and associated mineralogical and geochemical anomalies.

Shocked quartz from the late Eocene: Impact evidence from Massignano, Italy

Geology ◽  
1996 ◽  
Vol 24 (6) ◽  
pp. 483 ◽  
Author(s):  
Aron K. Clymer ◽  
David M. Bice ◽  
Alessandro Montanari
Keyword(s):  
Late Eocene ◽  
Shocked Quartz

Evidence from cathodoluminescence for non-volcanic origin of shocked quartz at the Cretaceous/Tertiary boundary

Nature ◽  
1988 ◽  
Vol 334 (6178) ◽  
pp. 145-147 ◽  
Author(s):  
Michael R. Owen ◽  
Mark H. Anders
Keyword(s):  
Volcanic Origin ◽  
Shocked Quartz

Shocked quartz grains from the Målingen structure, Sweden-Evidence for a twin crater of the Lockne impact structure

2014 ◽  
Vol 49 (6) ◽  
pp. 1076-1082 ◽  
Author(s):  
C. Alwmark ◽  
S. Alwmark-Holm ◽  
J. Ormö ◽  
E. Sturkell
Keyword(s):  
Impact Structure ◽  
Shocked Quartz ◽  
Quartz Grains

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
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