Tahalra Volcanic Field

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 22.67°N
  • 5°E

  • 1467 m
    4812 ft

  • 225004
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Tahalra Volcanic Field.

The Global Volcanism Program has no Weekly Reports available for Tahalra Volcanic Field.

The Global Volcanism Program has no Bulletin Reports available for Tahalra Volcanic Field.

The elongated, E-W-trending Tahalra volcanic field covers an area of about 1800 sq km in the Hoggar Province of southern Algeria. The large volcanic field lies WSW of the town of Tamanrasset and was active from the Miocene to the Holocene, producing alkaline strombolian cones and lava flows. The high point of the volcanic field, which was constructed over a basement of Precambrian metamorphic and plutonic rocks of the Tuareg shield, lies near its eastern end. A dozen trachytic-to-rhyolitic lava domes and spines formed during the Pliocene, and Pliocene-to Pleistocene activity formed about 100 small strombolian basaltic (mostly basanitic) cones. The most recent activity during the Pleistocene and Holocene produced about 20 maars and cones along the northern margin of the volcanic field.

The Global Volcanism Program is not aware of any Holocene eruptions from Tahalra Volcanic Field. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Tahalra Volcanic Field page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

The Global Volcanism Program has no synonyms or subfeatures listed for Tahalra Volcanic Field.

The dark-green and bluish-gray areas extending across this NASA Landsat image depict the elongated, E-W-trending Tahalra volcanic field, which covers an area of about 1800 sq km in the Hoggar Province of southern Algeria. About 100 small strombolian basaltic cones formed during the Pliocene and Pleistocene, and the most recent activity during the late-Pleistocene and Holocene produced about 20 maars and cones along the northern margin of the volcanic field.

NASA Landsat7 image (worldwind.arc.nasa.gov).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Dautria J M, Dostal J, Dupuy C, Liotard J M, 1988. Geochemistry and petrogenesis of alkali basalts from Tahalra (Hoggar, northwest Africa). Chem Geol, 69: 17-35.

Liegeois J-P, Benhallou A, Azzouni-Sekkal A, Yahiaoui R, Bonin B, 2005. The Hoggar swell and volcanism: reactivation of the Precambrian Tuareg shield during Alpine convergence and West African Cenozoic volcanism. In: Foulger G R, Natland H H, Presnall D C, Anderson D L (eds) Plates, Plumes, and Paradigms, {Geol Soc Amer Spec Pap}, 388: 379-400.

Volcano Types

Pyroclastic cone(s)
Maar(s)
Lava dome(s)

Tectonic Setting

Intraplate
Continental crust (> 25 km)

Rock Types

Major
Trachybasalt / Tephrite Basanite
Foidite
Minor
Trachyandesite / Basaltic trachy-andesite
Trachyte / Trachyandesite
Rhyolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
518
86,063

Affiliated Databases

Large Eruptions of Tahalra Volcanic Field Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.