Asymmetric spreading in back-arc basins

@article{Barker1980AsymmetricSI,
  title={Asymmetric spreading in back-arc basins},
  author={Peter F. Barker and Ian A. Hill},
  journal={Nature},
  year={1980},
  volume={285},
  pages={652-654}
}
Lineated magnetic anomalies indistinguishable from those generated at mid-oceanic ridges have been found behind many subduction zones. They show that back-arc spreading, like its mid-oceanic counterpart, is to a first approximation symmetric. Nevertheless, consistently asymmetric spreading has been found in some ocean basins, and in both actively spreading and extinct back-arc basins. We argue here that the sense of asymmetry found in active back-arc basins strongly supports a mechanism for the… Expand
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References

SHOWING 1-10 OF 21 REFERENCES
Near-bottom magnetic anomalies, asymmetric spreading, oblique spreading, and tectonics of the Mid-Atlantic Ridge near lat 37°N
A detailed study of the magnetic anomalies of the Mid-Atlantic Ridge crest near lat 37 °N (FAMOUS) was conducted using a deeply towed instrument package. The most recent expression of the accretingExpand
Extension behind island arcs and motions relative to hot spots
The spatial distribution and episodic nature of behind-arc spreading is as yet unexplained. The present sites of rapid marginal basin opening well-developed enough to be producing unmistakableExpand
Characteristics of back arc spreading in the Mariana Trough
Although sea floor spreading of some sort has created marginal basins, it is not known whether this spreading is similar to that at midocean ridges. Back arc spreading in the Mariana Trough occursExpand
Nature and implications of asymmetric sea-floor spreading — “Different rates for different plates”
Asymmetric sea-floor spreading has occurred south of Australia within narrow longitudinal zones of the Southeast Indian Ocean. The process of asymmetric spreading can be shown to be continuous at theExpand
Ridge migration and asymmetric sea-floor spreading
Abstract We propose that asymmetric sea-floor spreading occurs as a consequence of the relative motion between ridges and slow-moving mantle material below. A fluid mechanical model of asymmetricExpand
Recent plate motions in the Galapagos area
Recent accretion on the Cocos-Nazca spreading center has been asymmetric, with more material (along most of the rise) added to the Cocos than to the Nazca plate. There is evidence in the magneticExpand
The opening of Drake Passage
Abstract Marine magnetic anomalies are used to deduce the history of the opening of Drake Passage, the deep-water channel between South America and West Antarctica. Coherent spreading started inExpand
Tectonic evolution of the Cocos-Nazca spreading center
Magnetic and bathymetric data from the eastern Pacific have been analyzed and a model for the evolution of the Galapagos region developed. The Farallon plate appears to have broken apart along aExpand
Sea-floor spreading in marginal basins of the Western Pacific☆
Abstract Observed magnetic lineations from the Shikoku, South Fiji, and West Philippine marginal basins are used to determine aspects of the tectonic evolution of these basins. In the western part ofExpand
The history of ridge-crest offset at the Falkland—Agulhas Fracture Zone from a small-circle geophysical profile
Summary. The magnetic and bathymetric profiles are described along a single ship track following a small circle of South Atlantic opening about 100 km south of the Falkland-Agulhas Fracture ZoneExpand
...
1
2
3
...