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Publications (12)
The late upper-level subcircular Tisselliline pluton (c. 572 Ma), emplaced in Hoggar along the major Pan-African Ounane shear zone, is NNW-SSE oriented. Its magnetic fabric is mainly characterized by dome-shaped magnetic foliations and subhorizontal magnetic lineations. When approaching the nearby Ounane shear zone, the lineations become associated...
The magnetic fabric obtained in the Hoggar shield on several plutons is related to various origins: simple flow, syn-deformation flow, stress field during late-magmatic stage and solid-state deformation. These results also evidenced the important role of hosting frame, acting as a more or less efficient “protection” against the effects on the magne...
The Cheliff region has experienced some significant earthquakes in the last century (1937, 1954, and 1980). The most destructive
one is that of El Asnam on October 10, 1980, Ms=7.3 (Io=IX), which destroyed the Chlef city (formerly El Asnam) and its
surrounding villages. On December 16, 2006 a moderate earthquake (Mw=5.0) hit the Cheliff region. The...
a b s t r a c t In the Arokam Ténéré, the three studied massifs of granitoids are located around the N–S oriented Raghane mega-shear zone, which separates two of the main domains of the Tuareg shield, the Saharan metacraton and the Central Hoggar. The field observations, AMS analyses and U–Pb zircon dating were completed by a study of Landsat image...
The N–S oriented Raghane shear zone (8°30′) delineates the western boundary of the Saharan metacraton and is, with the 4°50′ shear zone, the most important shear zone in the Tuareg shield. It can be followed on 1000 km in the basement from southern Aïr, Niger to NE Hoggar, Algeria. Large subhorizontal movements have occurred during the Pan-African...
Magnetic fabric studies have been carried out in three plutons emplaced during Late Panafrican times (600 - 540 Ma) around the Raghane N-S mega-shear zone in southeastern Algeria. This shear zone, which can be observed across all the Aïr and Hoggar shield, is one of the most important in Africa. It separates two metacratons (LATEA and eastern Sahar...
This study describes the deformation in zones affected by regional shearing, and its relation with local factors, in particular
rock compositions. The Tihaliouine and Teg Orak plutons were emplaced close to a major shear zone of the Tuareg shield. Their
magmatic to sub-magmatic fabrics were determined by using measurements of anisotropy of magnetic...
The 21 May 2003 Zemmouri earthquake (M-s=6.8), which killed 2,278 people, injured 11,450, made 250,000 homeless, and destroyed or seriously damaged 6,000 buildings and 20,800 housing units, is the most significant earthquake to affect Algeria since the 1980 El Asnam earthquake (M-s=7.3). This paper presents the report of the macroseismic survey con...
Teg Orak and Tihaliouine are Late-Panafrican granitic intrusions situated in the Tuareg shield, northwest of Tamanrasset. Both plutons are located close to the 4°50 accident, one of the N-S major shear zone cutting the Hoggar. They are constituted of several granitic facies, indicating differentiation and multiphase intrusion. They show only very l...
On 21 May 2003, a damaging earthquake of Mw 6.8 struck the region of Boumerdes 40 km east of Algiers in northern Algeria (Figure 1). The main shock, which lasted ∼36–40 s, had devastating effects and claimed about 2300 victims, caused more than 11,450 injuries, and left about 200,000 people homeless. It destroyed and seriously damaged around 180,00...
