Tectonic Significance of the Afar (or Danakil) Depression

Tazieff, Haroun; Varet, Jacques; Barberi, F.; Giglia, G.

doi:10.1038/235144a0

Cited by 95 publications

(25 citation statements)

References 18 publications

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“…This is similar in size, morphology, and spacing to second order, non-transform offset segmentation of slow spreading mid-oceanic ridges (Hayward and Ebinger, 1996). The southward advance of the SSW-trend along Erta Ale-Manda Hararo is broken into shorter rift and magmatic segments that are arranged into rift-in-rift structure as they approach the Tendaho and Gobaad axial ranges further south (Tazieff and Varet, 1972).…”

Section: The Manda Hararo-gobaad Riftmentioning

confidence: 93%

Tectonics of the Afar Depression: A review and synthesis

Beyene

Abdelsalam

2005

Journal of African Earth Sciences

132

103

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Section: The Manda Hararo-gobaad Riftmentioning

confidence: 93%

Tectonics of the Afar Depression: A review and synthesis

Beyene

Abdelsalam

2005

Journal of African Earth Sciences

132

103

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“…3c; Tazieff et al, 1971;Barberi and Varet, 1977;Varet, 1978). Rifting at Asal (Delibrias et al, 1975) connected these structures to the Gulf of Tadjoura, separating the Danakil block from the rest of Afar (Figs.…”

Section: Quaternary Geology and Neotectonicsmentioning

confidence: 96%

The Red Sea and Gulf of Aden Basins

Bosworth

Huchon

McClay

2005

Journal of African Earth Sciences

807

346

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“…1A), covering a distance of about 110 km. It passes south of the Danakil Alps, which are composed of Mesozoic basement and are thought to have separated from the Ethiopian plateau by a 10-18 rotation around a pole in the Gulf of Zula during the past 4 Myr (Tazieff et al 1972;Sichler 1980;Souriot and Brun 1992). Several volcanoes make up the range, including Sork'Ale, the caldera complexes of Bara'Ale, Mallahle, and Nabro itself, which at 2,248 m marks the highest point in the NVR, the silicic domes of Mabda, Dubbi, the Edd lava field, and Kod Ali island located in the Red Sea (Fig.…”

Section: The Nabro Volcanic Range (Nvr)mentioning

confidence: 99%

Large magnitude silicic volcanism in north Afar: the Nabro Volcanic Range and Ma?alalta volcano

Wiart

Oppenheimer

2004

Bull Volcanol

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Much of the volcanological work carried out in north Afar (Ethiopia and Eritrea) has focused on the nature of Quaternary basaltic volcanic ranges, which have been interpreted by some as incipient oceanic ridges. However, we show here that comparable volumes of silicic magmas have been erupted in the region. In particular, the virtually undocumented Nabro Volcanic Range, which runs NNE for more than 100 km from the margin of the Danakil Depression to the Red Sea coast, has a subaerial volume of the order of 550 km 3 , comparable to the volume of the much better known Erta'Ale axial volcanic range. Nabro volcano itself forms part of an enigmatic double caldera structure with a neighbouring volcano, Mallahle. The twin caldera may have formed simultaneously with the eruption of between 20 and 100 km 3 of ignimbrite, which is readily identified in Landsat Thematic Mapper imagery. This may have been the largest explosive eruption in north Afar, and is certain to have deposited a regionally distributed tephra layer which could in the future be located in distal sections as a stratigraphic marker. An integrated analysis of optical and synthetic aperture radar imagery, digital topographic data, field observations and limited geochemical measurements, permits here descriptions and first order inferences about the structure, stratigraphy and compositions of several major volcanoes of the Afar Triangle, and a reappraisal of their regional significance.

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Tectonic Significance of the Afar (or Danakil) Depression

Cited by 95 publications

References 18 publications

Tectonics of the Afar Depression: A review and synthesis

Tectonics of the Afar Depression: A review and synthesis

The Red Sea and Gulf of Aden Basins

Large magnitude silicic volcanism in north Afar: the Nabro Volcanic Range and Ma?alalta volcano

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