Plume-Generated Triple Junctions: Key Indicators in Applying Plate Tectonics to Old Rocks

  title={Plume-Generated Triple Junctions: Key Indicators in Applying Plate Tectonics to Old Rocks},
  author={Kevin C. Burke and John F. Dewey},
  journal={The Journal of Geology},
  pages={406 - 433}
Continental lithosphere-especially where stationary with respect to mantle plumes-is marked by plume-generated uplifts typically crested by volcanoes that rupture in three rifts at angles of about 120° to each other, perhaps because this configuration requires the least work. It is proposed that since the plate tectonic regime began, about $$2 \times 10^{9}$$ years B.P., divergent plate motion has commonly begun at axial dikes emplaced in rifts formed in this way. A normal course of events is… 

Afar triple junction triggered by plume-assisted bi-directional continental break-up

3D thermo-mechanical numerical models suggest that Afar-like triple junctions are an end-member mode of plume-induced bi-directional rifting that combines asymmetrical northward pull and symmetrical EW extension at similar rates.

Plate Tectonics, the Wilson Cycle, and Mantle Plumes: Geodynamics from the Top

By 1968, J. Tuzo Wilson had identified three basic elements of geodynamics: plate tectonics, mantle plumes of deep origin, and the Wilson Cycle of ocean opening and closing, which provides evidence

Africa’s petroleum systems: four tectonic ‘Aces’ in the past 600 million years

Abstract We relate the depositional and structural histories of the sedimentary rocks containing Africa’s primary petroleum systems to four tectonic intervals, which in the light of their widespread

Evidence for a major Late Precambrian tectonic event (rifting?) in the Eastern Midcontinent Region, United States

Recently acquired gravity and aeromagnetic data delineate a large linear gravity anomaly which extends through eastern Kentucky and Tennessee and coincides with a zone of complex, high-amplitude

The evolution of triple junctions: from failure to success

Divergent triple junctions are stable plate margins where three spreading ridges meet. Although it is accepted that this configuration is inherited from an earlier phase of continental rifting, how

Did rifting on Australia’s Southern Margin result from tectonic uplift?

Subsidence analyses from Australia’s southern margin are used to investigate the idea that rifting on the margin was caused by an extensional lithospheric stress field induced by a hot thermal plume



Lithosphere Plate-Continental Margin Tectonics and the Evolution of the Appalachian Orogen

In terms of plate tectonic theory, and by analogy with modern continental margins, the Appalachian orogen evolved through a sequence of interrelated sedimentation-deformation-metamorphism patterns

Initial Deposits in the Cordilleran Geosyncline: Evidence of a Late Precambrian (<850 m.y.) Continental Separation

Upper Precambrian and Lower Cambrian strata in western North America are exposed in a narrow slightly sinuous belt extending from Alaska and northern Canada to northern Mexico, a distance of 2,500

The Karroo Volcanic Cycle

  • K. G. Cox
  • Geology
    Journal of the Geological Society
  • 1972
The petrogenesis of all the Mesozoic igneous rocks of south-eastern Africa is considered in relation to a single unifying thermotectonic event postulated as initiating the disruption of Gondwanaland.

Sea-Floor Spreading in the North Atlantic

The magnetic anomaly lineation pattern in the North Atlantic Ocean (between the latitudes of 15° N. and 63° N.) has been examined in light of the hypotheses of sea-floor spreading and plate

Tectonic history of the Ethiopian Rift as deduced by K-Ar ages and paleomagnetic measurements of basaltic dikes

The tectonic history within a continental rift is inferred from K-Ar ages and paleomagnetic measurements from oriented samples of basaltic dikes. The stresses required to produce the strain

Tibetan, Variscan, and Precambrian Basement Reactivation: Products of Continental Collision

Extensive terranes of basement reactivation are interpreted as resulting from crustal thickening following continental collision. It is suggested that terranes, such as the Grenville Province and

Earthquake fault parameters and tectonics in Africa

Fault plane solutions of earthquakes in southern Africa indicate that the least compressive stress is oriented approximately E-W nearly parallel to that in the northern part of the rift system.