Structure of the SE Greenland margin from seismic reflection and refraction data: Implications for nascent spreading center subsidence and asymmetric crustal accretion during North Atlantic opening

2003 ◽  
Vol 108 (B5) ◽  
Author(s):  
John R. Hopper ◽  
Trine Dahl-Jensen ◽  
W. Steven Holbrook ◽  
Hans Christian Larsen ◽  
Dan Lizarralde ◽  
...  
Keyword(s):  
North Atlantic ◽  
Seismic Reflection ◽  
Spreading Center ◽  
Crustal Accretion ◽  
Reflection And Refraction ◽  
Greenland Margin ◽  
Refraction Data

scholarly journals Deep structure of the Armorican Basin (Bay of Biscay): a review of Norgasis seismic reflection and refraction data

2003 ◽  
Vol 160 (1) ◽  
pp. 99-116 ◽  
Author(s):  
I. Thinon ◽  
L. Matias ◽  
J.P. RÉhault ◽  
A. Hirn ◽  
L. Fidalgo-GonzÁlez ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Deep Structure ◽  
Bay Of Biscay ◽  
Reflection And Refraction ◽  
Refraction Data

Crustal evolution of the Middle Urals based on seismic reflection and refraction data

1996 ◽  
Vol 264 (1-4) ◽  
pp. 21-34 ◽  
Author(s):  
C. Juhlin ◽  
J.H. Knapp ◽  
S. Kashubin ◽  
M. Bliznetsov
Keyword(s):  
Seismic Reflection ◽  
Middle Urals ◽  
Crustal Evolution ◽  
The Middle Urals ◽  
Reflection And Refraction ◽  
Refraction Data

Gravity and magnetic constraints on the Jurassic opening of the oceanic Gulf of Mexico and the location and tectonic history of the Western Main transform fault along the eastern continental margin of Mexico

2016 ◽  
Vol 4 (1) ◽  
pp. SC23-SC33 ◽  
Author(s):  
Luan C. Nguyen ◽  
Paul Mann
Keyword(s):  
Gulf Of Mexico ◽  
Oceanic Crust ◽  
Continental Margin ◽  
Seismic Reflection ◽  
Crustal Thickness ◽  
Gravity Models ◽  
Transform Fault ◽  
Reflection And Refraction ◽  
Gravity And Magnetic ◽  
Refraction Data

Although the Gulf of Mexico (GOM) has been the subject of geophysical and geologic studies for several decades, its crustal structures and opening kinematics remain poorly understood largely because of the difficulty in imaging the deeper basinal structure beneath its thick sedimentary and evaporitic layers. We have used gravity and magnetic data combined with seismic reflection and refraction data to better understand the crustal structure and basin opening kinematics. We have focused on the 700-km-long Jurassic continent/ocean transform fault that accommodated counterclockwise rotation of the Yucatan Block along the eastern continental margin of Mexico. We have used recent satellite-derived gravity data to reveal the pattern of spreading ridge-transform segments in the center of the basin. We then derived on a pole of rotation that revealed the kinematics of early opening of the GOM basin and the tectonic control the continent-ocean transform fault, the Western Main Transform fault (WMTF), that defined the continent-ocean boundary (COB) between continental rocks in the eastern Mexico and Jurassic oceanic crust in the western GOM. Regional magnetic anomaly data along with seismic reflection and refraction data were used to further constrain the location of the WMTF. Three 2D gravity models revealed the location of the WMTF approximately 100 km offshore eastern Mexico at its furthest point and extending onshore in southern Mexico. The gravity models found that the contact between continental and oceanic crust is marked by an abrupt increase from 6.5 to 10 km in crustal thickness. To the west of the WMTF, the eastern Mexico margin is underlain by a 60-km-wide zone of stretched continental crust. We also determined a COB for the entire GOM that was consistent with the plate reconstruction, values of crustal thickness based on seismic refraction, and fracture zone azimuths related to the Jurassic spreading system.

scholarly journals Synoptic interpretation of seismic reflection and refraction data

1987 ◽  
Vol 89 (1) ◽  
pp. 345-352 ◽  
Author(s):  
St. Mueller ◽  
J. Ansorge ◽  
N. Sierro ◽  
P. Finckh ◽  
D. Emter
Keyword(s):  
Seismic Reflection ◽  
Reflection And Refraction ◽  
Refraction Data

scholarly journals Recording seismic reflections using rigidly interconnected geophones

Geophysics ◽  
2001 ◽  
Vol 66 (6) ◽  
pp. 1838-1842 ◽  
Author(s):  
C. M. Schmeissner ◽  
K. T. Spikes ◽  
D. W. Steeples
Keyword(s):  
Wave Propagation ◽  
Data Acquisition ◽  
Seismic Reflection ◽  
Spatial Sampling ◽  
P Wave ◽  
Signal Distortion ◽  
Reflection And Refraction ◽  
First Arrival ◽  
The Cost ◽  
Seismic Reflections

Ultrashallow seismic reflection surveys require dense spatial sampling during data acquisition, which increases their cost. In previous efforts to find ways to reduce these costs, we connected geophones rigidly to pieces of channel iron attached to a farm implement. This method allowed us to plant the geophones in the ground quickly and automatically. The rigidly interconnected geophones used in these earlier studies detected first‐arrival energy along with minor interfering seismic modes, but they did not detect seismic reflections. To examine further the feasibility of developing rigid geophone emplacement systems to detect seismic reflections, we experimented with four pieces of channel iron, each 2.7 m long and 10 cm wide. Each segment was equipped with 18 geophones rigidly attached to the channel iron at 15‐cm intervals, and the spikes attached to all 18 geophones were pushed into the ground simultaneously. The geophones detected both refracted and reflected energy; however, no significant signal distortion or interference attributable to the rigid coupling of the geophones to the channel iron was observed in the data. The interfering seismic modes mentioned from the previous experiments were not detected, nor was any P‐wave propagation noted within the channel iron. These results show promise for automating and reducing the cost of ultrashallow seismic reflection and refraction surveys.

Seismic reflection and refraction profiling across the Arunta Block and the Ngalia and Amadeus Basins

1988 ◽  
Vol 35 (3) ◽  
pp. 275-294 ◽  
Author(s):  
B. R. Goleby ◽  
C. Wright ◽  
C. D. N. Collins ◽  
B. L. N. Kennett
Keyword(s):  
Seismic Reflection ◽  
Reflection And Refraction
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