Journal ArticleDOI
The Gibbs Fracture Zone: A double fracture zone at 52°30′N in the Atlantic Ocean
Reads0
Chats0
TLDR
A bathymetric survey of the offset in the Mid-Atlantic Ridge Crest at approximately 53°N revealed an east-west offset of 190 nautical miles and a north-south offset of 75 nautical mile as discussed by the authors.Abstract:
A bathymetric survey of the offset in the Mid-Atlantic Ridge Crest at approximately 53°N revealed an east-west offset of 190 nautical miles and north-south offset of 75 nautical miles. The offset is filled with two valleys separated by a sill below 1900 fm. The valley strend approximately 95° east of north and are inconsistent with spreading poles calculated for the north Atlantic. Their trends have been used by earlier authors to calculate poles of rotation. It is proposed to name the offset The Gibbs Fracture Zone after the ship that made the survey.read more
Citations
More filters
Journal ArticleDOI
Numerical Modelling of Instantaneous Plate Tectonics
TL;DR: In this article, a self-consistent model of instantaneous relative motions for eleven major plates is presented, assuming that the lithospheric plates to be rigid, and the authors systematically invert 68 spreading rates, 62 fracture zones trends and 10^6 earthquake slip vectors simultaneously to obtain a self consistent model.
Journal ArticleDOI
Plate kinematics: The Americas, East Africa, and the rest of the world
TL;DR: In this paper, Euler vectors (relative angular velocity vectors) have been determined for twelve major plates by global inversion of carefully selected sea-floor spreading rates, transform fault trends, and earthquake slip vectors.
Journal ArticleDOI
Mode of the strain release along the Gibbs fracture zone, Mid-Atlantic ridge
Hiroo Kanamori,Gordon S. Stewart +1 more
TL;DR: The Gibbs fracture zone (52°N, 35°W) is one of the major transform faults in the Atlantic as discussed by the authors, and the seismic moments determined by using the long-period (40-200 sec) G_1 and R_1 waves are 3.4 · 10^(26) and 4.5 · 10−26) dyne · cm, respectively.
Journal ArticleDOI
Detailed magnetic surveys in the Northeast Atlantic and Labrador Sea
P. R. Vogt,O. E. Avery +1 more
TL;DR: A detailed history of ocean floor spreading in the northeast Atlantic is revealed by detailed marine grid surveys of the magnetic field between Reykjanes ridge and the British Isles and between southern Greenland and Labrador as discussed by the authors.
Journal ArticleDOI
Transform faults and longitudinal flow below the Midoceanic Ridge
Peter R. Vogt,G. Leonard Johnson +1 more
TL;DR: In this paper, the authors derived a Parker-Oldenburg law of plate thickness increasing as the square root of crustal age to estimate the extent of blockage at major transform faults.
References
More filters
Journal ArticleDOI
Sea-floor spreading and continental drift
TL;DR: In this article, a geometrical model of the surface of the earth is obtained in terms of rigid blocks in relative motion with respect to each other, and a simplified but complete and consistent picture of the global pattern of surface motion is given on the basis of data on sea-floor spreading.
Journal ArticleDOI
The Fit of the Continents around the Atlantic
TL;DR: Fits made by numerical methods, with a ‘least squares’ criterion of fit, for the continents around the Atlantic ocean are described, finding the best fit to be at the 500 fm contour which lies on the steep part of the continental edge.
Journal ArticleDOI
A New Class of Faults and their Bearing on Continental Drift
TL;DR: In this article, the authors proposed the notion of dextral transform faults, which can be seen as a pair of half-shears joined end-to-end, which is the case of the San Andreas Transform Fault.
Journal ArticleDOI
Rises, trenches, great faults, and crustal blocks
TL;DR: In this article, the transform fault concept is extended to a spherical surface, where the motion of one block relative to another block may then be described by a rotation of a rigid crustal blocks relative to the other block.
Journal ArticleDOI
Marine magnetic anomalies, geomagnetic field reversals, and motions of the ocean floor and continents
TL;DR: In this article, it was shown that the geomagnetic anomalies are caused by a sequence of normally and reversely magnetized blocks that have been produced by sea floor spreading at the axes of the ridge in the Pacific, Atlantic, and Indian oceans.