Gravity anomalies of the Mid-Atlantic Ridge north of the Kane Fracture Zone

1996 ◽  
Vol 23 (23) ◽  
pp. 3431-3434 ◽  
Author(s):  
H. Fujimoto ◽  
N. Seama ◽  
J. Lin ◽  
T. Matsumoto ◽  
T. Tanaka ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Gravity Anomalies ◽  
Mid Atlantic Ridge

Comoros – New Evidence and Arguments for Continental Crust

2016 ◽  
Author(s):  
John Milsom ◽  
Phil Roach ◽  
Chris Toland ◽  
Don Riaroh ◽  
Chris Budden ◽  
...  
Keyword(s):  
Continental Crust ◽  
Fracture Zone ◽  
Seismic Data ◽  
Gravity Anomalies ◽  
Magnetic Anomalies ◽  
Magnetic Data ◽  
The West ◽  
Sea Floor ◽  
Inappropriate Use ◽  
Sea Floor Spreading

ABSTRACT As part of an ongoing exploration effort, approximately 4000 line-km of seismic data have recently been acquired and interpreted within the Comoros Exclusive Economic Zone (EEZ). Magnetic and gravity values were recorded along the seismic lines and have been integrated with pre-existing regional data. The combined data sets provide new constraints on the nature of the crust beneath the West Somali Basin (WSB), which was created when Africa broke away from Gondwanaland and began to move north. Despite the absence of clear sea-floor spreading magnetic anomalies or gravity anomalies defining a fracture zone pattern, the crust beneath the WSB has been generally assumed to be oceanic, based largely on regional reconstructions. However, inappropriate use of regional magnetic data has led to conclusions being drawn that are not supported by evidence. The identification of the exact location of the continent-ocean boundary (COB) is less simple than would at first sight appear and, in particular, recent studies have cast doubt on a direct correlation between the COB and the Davie Fracture Zone (DFZ). The new high-quality reflection seismic data have imaged fault patterns east of the DFZ more consistent with extended continental crust, and the accompanying gravity and magnetic surveys have shown that the crust in this area is considerably thicker than normal oceanic and that linear magnetic anomalies typical of sea-floor spreading are absent. Rifting in the basin was probably initiated in Karoo times but the generation of new oceanic crust may have been delayed until about 154 Ma, when there was a switch in extension direction from NW-SE to N-S. From then until about 120 Ma relative movement between Africa and Madagascar was accommodated by extension in the West Somali and Mozambique basins and transform motion along the DFZ that linked them. A new understanding of the WSB can be achieved by taking note of newly-emerging concepts and new data from adjacent areas. The better-studied Mozambique Basin, where comprehensive recent surveys have revealed an unexpectedly complex spreading history, may provide important analogues for some stages in WSB evolution. At the same time the importance of wide continent-ocean transition zones marked by the presence of hyper-extended continental crust has become widely recognised. We make use of these new insights in explaining the anomalous results from the southern WSB and in assessing the prospectivity of the Comoros EEZ.

Flows through the Mid-Atlantic Ridge in the Northern Channels. Charlie Gibbs Fracture Zone and Other Fracture Zones

2010 ◽  
pp. 235-245
Author(s):  
Eugene G. Morozov ◽  
Alexander N. Demidov ◽  
Roman Y. Tarakanov ◽  
Walter Zenk
Keyword(s):  
Fracture Zone ◽  
Fracture Zones ◽  
Mid Atlantic Ridge

Aeromagnetic study of the Mid-Atlantic Ridge near the Oceanographer Fracture Zone

1975 ◽  
Vol 86 (10) ◽  
pp. 1348 ◽  
Author(s):  
J. D. PHILLIPS ◽  
H. S. FLEMING ◽  
R. H. FEDEN ◽  
W. E. KING ◽  
R. K. PERRY
Keyword(s):  
Fracture Zone ◽  
Mid Atlantic Ridge

scholarly journals Bathyal benthic megafauna from the Mid‐Atlantic Ridge in the region of the Charlie-Gibbs fracture zone based on remotely operated vehicle observations

2019 ◽  
Vol 145 ◽  
pp. 1-12 ◽  
Author(s):  
Claudia H.S. Alt ◽  
Antonina Kremenetskaia (Rogacheva) ◽  
Andrey V. Gebruk ◽  
Andrew J. Gooday ◽  
Daniel O.B. Jones
Keyword(s):  
Fracture Zone ◽  
Remotely Operated Vehicle ◽  
Mid Atlantic Ridge

Aeromagnetic study of the Mid-Atlantic Ridge near the Oceanographer Fracture Zone

2015 ◽  
pp. 427-436
Author(s):  
J. D. Phillips ◽  
H. S. Fleming ◽  
R. H. Feden ◽  
W. E. King ◽  
R. K. Perry
Keyword(s):  
Fracture Zone ◽  
Mid Atlantic Ridge

Transport of bottom waters through the Vema Fracture Zone in the Mid-Atlantic ridge

2007 ◽  
Vol 416 (1) ◽  
pp. 1120-1124 ◽  
Author(s):  
A. N. Demidov ◽  
S. A. Dobrolyubov ◽  
E. G. Morozov ◽  
R. Yu. Tarakanov
Keyword(s):  
Fracture Zone ◽  
Bottom Waters ◽  
Mid Atlantic Ridge

Deep-tow studies of the Vema Fracture Zone: 1. Tectonics of a major slow slipping transform fault and its intersection with the Mid-Atlantic Ridge

1986 ◽  
Vol 91 (B3) ◽  
pp. 3334-3354 ◽  
Author(s):  
Ken. C. Macdonald ◽  
David A. Castillo ◽  
Stephen P. Miller ◽  
Paul J. Fox ◽  
Kim A. Kastens ◽  
...  
Keyword(s):  
Fracture Zone ◽  
Transform Fault ◽  
Mid Atlantic Ridge
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