Crustal structure northwest of the Sudbury meteorite-impact structure (LITHOPROBE reflection-seismic AGT Line 42)

1997 ◽  
Vol 1 (4) ◽  
pp. 189-201 ◽  
Author(s):  
W. M. Moon ◽  
X. G. Miao
Keyword(s):  
Crustal Structure ◽  
Impact Structure ◽  
Meteorite Impact ◽  
Reflection Seismic

scholarly journals Lake Lappajärvi, Central Finland: a Possible Meteorite Impact Structure

Nature ◽  
1968 ◽  
Vol 217 (5127) ◽  
pp. 438-438 ◽  
Author(s):  
NILS-BERTIL SVENSSON
Keyword(s):  
Impact Structure ◽  
Meteorite Impact

The Lake Bosumtwi meteorite impact structure, Ghana-A magnetic image from a third observational level

2007 ◽  
Vol 42 (4-5) ◽  
pp. 793-800 ◽  
Author(s):  
Hernan UGALDE ◽  
William A. MORRIS ◽  
Christina CLARK ◽  
Brett MILES ◽  
Bernd MILKEREIT
Keyword(s):  
Impact Structure ◽  
Meteorite Impact ◽  
Magnetic Image

Deep crustal structure across a young passive margin from wide-angle and reflection seismic data (The SARDINIA Experiment) – II. Sardinia’s margin

2015 ◽  
Vol 186 (4-5) ◽  
pp. 331-351 ◽  
Author(s):  
Alexandra Afilhado ◽  
Maryline Moulin ◽  
Daniel Aslanian ◽  
Philippe Schnürle ◽  
Frauke Klingelhoefer ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Passive Margin ◽  
Data Sets ◽  
Wide Angle ◽  
Seismic Velocities ◽  
The West ◽  
Reflection Seismic ◽  
Gulf Of Lion ◽  
Deep Crustal Structure ◽  
Domain Iii

Abstract Geophysical data acquired on the conjugate margins system of the Gulf of Lion and West Sardinia (GLWS) is unique in its ability to address fundamental questions about rifting (i.e. crustal thinning, the nature of the continent-ocean transition zone, the style of rifting and subsequent evolution, and the connection between deep and surface processes). While the Gulf of Lion (GoL) was the site of several deep seismic experiments, which occurred before the SARDINIA Experiment (ESP and ECORS Experiments in 1981 and 1988 respectively), the crustal structure of the West Sardinia margin remains unknown. This paper describes the first modeling of wide-angle and near-vertical reflection multi-channel seismic (MCS) profiles crossing the West Sardinia margin, in the Mediterranean Sea. The profiles were acquired, together with the exact conjugate of the profiles crossing the GoL, during the SARDINIA experiment in December 2006 with the French R/V L’Atalante. Forward wide-angle modeling of both data sets (wide-angle and multi-channel seismic) confirms that the margin is characterized by three distinct domains following the onshore unthinned, 26 km-thick continental crust : Domain V, where the crust thins from ~26 to 6 km in a width of about 75 km; Domain IV where the basement is characterized by high velocity gradients and lower crustal seismic velocities from 6.8 to 7.25 km/s, which are atypical for either crustal or upper mantle material, and Domain III composed of “atypical” oceanic crust. The structure observed on the West Sardinian margin presents a distribution of seismic velocities that is symmetrical with those observed on the Gulf of Lion’s side, except for the dimension of each domain and with respect to the initiation of seafloor spreading. This result does not support the hypothesis of simple shear mechanism operating along a lithospheric detachment during the formation of the Liguro-Provencal 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

scholarly journals Crustal structure beneath the Rif Cordillera, North Morocco, from the RIFSIS wide-angle reflection seismic experiment

2014 ◽  
Vol 15 (12) ◽  
pp. 4712-4733 ◽  
Author(s):  
Alba Gil ◽  
Josep Gallart ◽  
Jordi Diaz ◽  
Ramon Carbonell ◽  
Montserrat Torne ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Wide Angle ◽  
Reflection Seismic ◽  
Seismic Experiment

SAVONOSKI CRATER, ALASKA: A POSSIBLE METEORITE IMPACT STRUCTURE

Meteoritics ◽  
1972 ◽  
Vol 7 (2) ◽  
pp. 97-107 ◽  
Author(s):  
Bevan M. French ◽  
Ernest H. Muller ◽  
Peter L. Ward
Keyword(s):  
Impact Structure ◽  
Meteorite Impact

scholarly journals The crustal structure of the NW Moroccan continental margin from wide-angle and reflection seismic data

2004 ◽  
Vol 159 (1) ◽  
pp. 117-128 ◽  
Author(s):  
I. Contrucci ◽  
F. Klingelhöfer ◽  
J. Perrot ◽  
R. Bartolome ◽  
M.-A. Gutscher ◽  
...  
Keyword(s):  
Continental Margin ◽  
Crustal Structure ◽  
Seismic Data ◽  
Wide Angle ◽  
Reflection Seismic

Reflection seismic imaging of the Lujiang–Zongyang volcanic basin, Yangtze Metallogenic Belt: An insight into the crustal structure and geodynamics of an ore district

2013 ◽  
Vol 606 ◽  
pp. 60-77 ◽  
Author(s):  
Qingtian Lϋ ◽  
Jiayong Yan ◽  
Danian Shi ◽  
Shuwen Dong ◽  
Jingtian Tang ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Seismic Imaging ◽  
Reflection Seismic ◽  
Metallogenic Belt ◽  
Insight Into ◽  
Ore District

scholarly journals The biostratigraphy of sediments deposited in the Lake Kaali meteorite impact structure, Saaremaa island, Estonia

1991 ◽  
Vol 63 (2) ◽  
pp. 129-139 ◽  
Author(s):  
L. Saarse ◽  
R. Rajamäe ◽  
A. Heinsalu ◽  
J. Vassiljev
Keyword(s):  
Impact Structure ◽  
Meteorite Impact
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