Modeling wide-angle seismic data for crustal structure: Southeastern Grenville Province

1994 ◽  
Vol 99 (B6) ◽  
pp. 11687-11704 ◽  
Author(s):  
C. A. Zelt ◽  
D. A. Forsyth
Keyword(s):  
Crustal Structure ◽  
Seismic Data ◽  
Wide Angle ◽  
Grenville Province

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

Seismic structure of the Central Metasedimentary Belt, southern Grenville Province

1994 ◽  
Vol 31 (2) ◽  
pp. 243-254 ◽  
Author(s):  
C. A. Zelt ◽  
D. A. Forsyth ◽  
B. Milkereit ◽  
D. J. White ◽  
I. Asudeh ◽  
...  
Keyword(s):  
Seismic Data ◽  
High Velocity ◽  
Hanging Wall ◽  
New York State ◽  
Lake Ontario ◽  
Wide Angle ◽  
Seismic Structure ◽  
Lateral Velocity ◽  
Crust And Upper Mantle ◽  
Grenville Province

Crust and upper-mantle structure interpreted from wide-angle seismic data along a 260 km profile across the Central Metasedimentary Belt of the southern Grenville Province in Ontario and New York State shows (i) relatively high average crustal and uppermost mantle velocities of 6.8 and 8.3 km/s, respectively; (ii) east-dipping reflectors extending to 24 km depth in the Central Metasedimentary Belt; (iii) weak lateral velocity variations beneath 5 km; (iv) a mid-crustal boundary at 27 km depth; and (v) a depth to Moho of 43–46 km. The wide-angle model is generally consistent with the vertical-incidence reflectivity of an intersecting Lithoprobe reflection line. The mid-crustal boundary correlates with a crustal detachment zone in the Lithoprobe data and the depth extent of east-dipping wide-angle reflectors. Regional structure and aeromagnetic anomaly trends support the southwest continuity of Grenville terranes and their boundaries from the wide-angle profile to two reflection lines in Lake Ontario. A zone of wide-angle reflectors with an average apparent eastward dip of 13° has a surface projection that correlates spatially with the boundary between the Elzevir and Frontenac terranes of the Central Metasedimentary Belt and resembles reflection images of a crustal-scale shear zone beneath Lake Ontario. A high-velocity upper-crustal anomaly beneath the Elzevir–Frontenac boundary zone is positioned in the hanging wall associated with the concentrated zone of wide-angle reflectors. The high-velocity anomaly is coincident with a gravity high and increased metamorphic grade, suggesting northwest transport of mid-crustal rocks by thrust faulting consistent with the mapped geology. The seismic data suggest (i) a reflective, crustal-scale structure has accommodated northwest-directed tectonic transport within the Central Metasedimentary Belt; (ii) this structure continues southwest from the exposed Central Metasedimentary Belt to at least southern Lake Ontario; and (iii) crustal reflectivity and complexity within the eastern Central Metasedimentary Belt is similar to that observed at the Grenville Front and the western Central Metasedimentary Belt boundary.

Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area

2019 ◽  
Vol 770 ◽  
pp. 228220 ◽  
Author(s):  
Weina Zhao ◽  
Huigang Wang ◽  
Hongcai Shi ◽  
Hui Xie ◽  
Zhiqiang Wu ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Seismic Data ◽  
Adjacent Area ◽  
Wide Angle ◽  
Data Application

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

2007 ◽  
Author(s):  
Frauke Klingelhoefer ◽  
Daniel Aslanian* ◽  
Cynthia Labails ◽  
Jean-Louis Olivet ◽  
Hervé Nouzé ◽  
...  
Keyword(s):  
Continental Margin ◽  
Crustal Structure ◽  
Seismic Data ◽  
Wide Angle ◽  
Reflection Seismic

Crustal structure of the Middle American Trench off Costa Rica from wide-angle seismic data

Tectonics ◽  
1996 ◽  
Vol 15 (5) ◽  
pp. 1006-1021 ◽  
Author(s):  
S. Ye ◽  
J. Bialas ◽  
E. R. Flueh ◽  
A. Stavenhagen ◽  
R. von Huene ◽  
...  
Keyword(s):  
Costa Rica ◽  
Crustal Structure ◽  
Seismic Data ◽  
Wide Angle

scholarly journals Crustal structure of the Murray Ridge, northwest Indian Ocean, from wide-angle seismic data

2015 ◽  
Vol 202 (1) ◽  
pp. 454-463 ◽  
Author(s):  
T.A. Minshull ◽  
R.A. Edwards ◽  
E.R. Flueh
Keyword(s):  
Indian Ocean ◽  
Crustal Structure ◽  
Seismic Data ◽  
Wide Angle
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