Hasnaa Chennaoui Aoudjehane

Université Hassan II Mohammedia | FSAC · Geology

We performed scanning electron microscopy and electron microprobe analysis on the eucritic meteorites Errachidia 002 and Northwest Africa 11911, with a focus on the metallic iron disseminated in them, in order to constrain the processes involved in its formation, and discuss its implication for their parent body collisional history. Errachidia 002...

In this work, we investigate macroscopic characteristics, magnetic susceptibility, mineralogy, and mineral composition of Al Haggounia 001. The samples were collected during eight field missions in the period between 2015 and 2019. In the strewn field of about 65 km in length, the specimens are found either on the surface or shallowly buried in loo...

Morocco is known for the high number of meteorites collected in its territory, including finds and falls. This is explained by the large size of the Moroccan Sahara, the guarantee of security in this desert, and the large community of well‐trained Moroccan hunters and nomads who roam through it. Despite this richness, most meteorites collected in M...

Eucrites, diogenites and howardites (HEDs) form the most abundant clan of achondrites on Earth. They represent samples of a differentiated body, widely believed to be the asteroid (4) Vesta [1]. Telescopic observations and Dawn mission data showed that the surface of Vesta is heavily cratered, which is consistent with the brec-ciated nature of most...

We report a huge organic diversity in the Tissint Mars meteorite and the sampling of several mineralogical lithologies, which revealed that the organic molecules were nonuniformly distributed in functionality and abundance. The range of organics in Tissint meteorite were abundant C3-7 aliphatic branched carboxylic acids and aldehydes, olefins, and...

The mechanisms responsible for the formation of Fe-rich, metasomatic features in eucrites and their debris in howardites are yet controversial. In this study, secondary phases found in polymict eucrite NWA (Northwest Africa) 11911, howardite NWA 1664, monomict eucrite NWA 8675 and unbrecciated basaltic eucrite NWA 13269 were investigated to elucida...

Current up-to-date programme for the 2022 Inaugural Forming and Exploring Habitable Worlds Meeting, University of Edinburgh, UK. This interdisciplinary conference is bringing people together from a range of disciplines during the week beginning November 7th 2022. Over 80 exciting abstracts! Looking forward to the event!

Tirhert and Aouinet Legraa are the only documented unbrecciated eucrite falls in Africa. Aouinet Legraa fell in Algeria on July 17, 2013. Tirhert's fall occurred about a year later in Morocco, on July 9, 2014. Both meteorites are covered by a black and glossy fusion crust as is typical of eucrites. Tirhert has a poikilitic texture with remnant subo...

Meteorites are ultrabasic, basic or intermediate extraterrestrial rocks with most of them containing chondrules. They are crucial not only to the apparition of water and life on Earth but also to the mass extinction of species. Meteorites are mostly found in cold deserts such as Antarctica and hot ones such as Oman, Sahara and Chili. The Sahara, an...

Meteoritical Bulletin 109 contains the 2790 meteorites approved by the Nomenclature Committee of the Meteoritical Society in 2020. It includes 17 falls (Al Farciya, Auckland, Cavezzo, Flensburg, Gatuto, Kolang, Mahadeva, Matarka, Narashino, Novo Mesto, Oslo, Saint‐Ouen‐en‐Champagne, Santa Filomena, Tarda, Tiros, Wad Lahteyba, Zhob), with 2336 ordin...

Fireball camera networks are being pursued all over the world and continuously monitor the night sky for fire- balls produced as larger meteoroids enter the Earth’s atmosphere at high speeds. As well, in Morocco we have a new detection network calling MOFID network (Moroccan Observatory For Fireball Detection), which is a cooperation with the team...

Context: Until recently, camera networks designed for monitoring fireballs worldwide were not fully automated, implying that in case of a meteorite fall, the recovery campaign was rarely immediate. This was an important limiting factor as the most fragile - hence precious - meteorites must be recovered rapidly to avoid their alteration. Aims: To o...

Context. Until recently, camera networks designed for monitoring fireballs worldwide were not fully automated, implying that in case of a meteorite fall, the recovery campaign was rarely immediate. This was an important limiting factor as the most fragile – hence precious – meteorites must be recovered rapidly to avoid their alteration. Aims. The F...

The world's meteorite collections contain a very rich picture of what the early Solar System would have been made of, however the lack of spatial context with respect to their parent population for these samples is an issue. The asteroid population is equally as rich in surface mineralogies, and mapping these two populations (meteorites and asteroi...

The meteorite collections contain a very rich picture of what the early Solar System would have been made of, however the lack of spatial context with respect to their parent population for these samples is an issue. The asteroid population is equally as rich in surface mineralogies, and mapping these two populations (meteorites and asteroids) toge...

51st Lunar and Planetary Science Conference (2020)

Landslide susceptibility indices were calculated and landslide susceptibility maps were generated for the Oudka, Morocco, study area using a geographic information system. The spatial database included current landslide location, topography, soil, hydrology, and lithology, and the eight factors related to landslides (elevation, slope, aspect, dista...

We describe the geological, geomorphological, and paleoclimatic setting of the Sahara of North Africa in particular, focused on the main meteorite dense collection areas (DCA; Morocco, Algeria, Tunisia, and Libya). We report on the outcome of several meteorite recovery field expeditions in Morocco and Tunisia since 2008, by car and by foot, that ap...

The Agoudal IIAB iron meteorite exhibits only kamacite grains (~6 mm across) without any taenite. The kamacite is homogeneously enriched with numerous rhabdite inclusions of different size, shape, and composition. In some kamacite domains, this appears frosty due to micron‐scale rhabdite inclusions (~5 to 100 μm) of moderate to high Ni content (~26...

Since the discovery of shatter cones (SCs) near the village of Agoudal (Morocco, Central High Atlas Mountains) in 2013, the absence of one or several associated circular structures led to speculation about the age of the impact event, the number, and the size of the impact crater or craters. Additional constraints on the crater size, age, and erosi...

Etude paléomagnétique et pétrographique d'une zone d'impact météoritique d'Agoudal au Maroc pour comprendre l'âge de l'impact sur les roches carbonatées par les outils dans le palémagnétisme.

This document contains suggestions for best practices by authors who refer to meteorites in publications. It can also be taken as a guide for publishers in establishing guidelines for authors. The following best practices are recommended in addition to acknowledging the loaning institution or loaning individual (unless required otherwise). The main...

The Rif is among the areas of Morocco most susceptible to landslides, because of the existence of relatively young reliefs marked by a very important dynamics compared to other regions. These landslides are one of the most serious problems on many levels: social, economic and environmental. The increase in the frequency and impact of landslides ove...

Since the discovery of shatter cones at the Agoudal (Morocco, Central High Atlas Mountains) in 2013 [1], the impact site has received various interpretations in terms of its relation to the Agoudal meteorite fall, its size(s) or number of impact structures [1, 2, 3, 4, 5]. The characteristics of the impact site may only be constrained by indirect a...

Comparative planetology is crucial to unravel the origin and evolution of volatile elements on terrestrial planets. We report precise measurements of the elemental and isotopic composition of nitrogen and noble gases in the Martian meteorite Tissint. Ar-N2 correlations confirm discrepancies between results from Viking and Martian meteorites and tho...

We present a report about the fourth Arab Impact Cratering and Astrogeology Conference (AICAC IV) that took place in Algiers at the USTHB (Université des Sciences et Technologie Houari Boumedienne, Algiers, Algeria) in the presence of the presidents of the USTHB and Boumerdès Universities, the Director of CRAAG (Centre de Recherche en Astronomie, A...

Elevating planetary and space sciences across Africa could help nations reach their development goals. Efforts will require collaboration, creativity, efficient planning, and political will.

Africa has an enormous potential to provide insights into planetary and space sciences, but it has remained largely untapped. Fostering a new generation of scientists promises far-reaching benefits.

80th Annual Meeting of the Meteoritical-Society, Santa Fe, NM, JUL 23-28, 2017

Tissint, a new unaltered piece of Martian volcanic materials, is the most silica-poor and Mg-Fe-rich igneous rock among the “depleted” olivine-phyric shergottites. Fe-Mg zoning of olivine suggests equilibrium growth (<0.1 °C h−1) in the range of Fo80–56 and olivine overgrowth (Fo55–18) through a process of rapid disequilibrium (~1.0–5.0 °C h−1). Th...

Associations between impact structures and meteorite occurrences are rare and restricted to very young structures. Meteorite fragments are often disrupted in the atmosphere, and in most cases, meteorite falls that have been decelerated by atmospheric drag do not form a crater. Furthermore, meteorites are rapidly weathered. In this context, the find...

Shatter cones are a fracture phenomenon that is exclusively associated with shock metamorphism and has also been produced in the laboratory in several shock experiments. The occurrence of shatter cones is the only accepted meso-to macroscopic recognition criterion for impact structures. Shatter cones exhibit a number of geometric characteristics (o...

Abstract The current terrestrial impact crater record includes 187 accepted structures (http://www.passc.net/EarthImpactDatabase and Ferrière et al. 2015). This number continues to increase slowly but quite regularly. The heterogeneous distribution of impact structures is strongly influenced by the knowledge about impact cratering of exploration ge...

The current terrestrial impact crater record includes 188 accepted structures (http://www.passc.net/EarthImpactDatabase and Ferrière et al., 2015). This number continues to increase slowly but quite regularly. The heterogeneous distribution of impact structures is strongly influenced by the knowledge about impact cratering of exploration geologists...

Lithium abundances and isotope compositions are reported for a suite of martian meteorites that span the range of petrological and geochemical types recognized to date for Mars. Samples include twenty-one bulk-rock enriched, intermediate and depleted shergottites, six nakhlites, two chassignites, the orthopyroxenite Allan Hills (ALH) 84001 and the...

The recently discovered Agoudal impact site in Morocco is a small, eroded impact structure with well-developed shatter cones. A scanning electron microscopic study of a shatter cone surface has revealed the presence of schreibersite – a phosphide very rare on Earth but common in iron meteorites – and Fe-Ni-oxides. This is the first reported evidenc...

Schreibersite adherent to a shatter cone from the Agoudal impact site, Morocco, suggests the impact of an iron meteorite — possibly the Agoudal IIAB iron.

A relic impact structure was recognized within the strewn field of the Agoudal iron meteorite. The heavily eroded structure has preserved shatter cones in a limestone basement, and remnants of autochthonous and allochthonous breccias. Fragments of iron incorporated into the allochthonous breccia have a chemical composition (Ni = 5.16 wt%, Ir = 0.01...

Agoudal (High Atlas Mountains, Morocco) site is the first discovery of an impact structure in Morocco. In this area, was discovered Agoudal IIAB iron meteorite.

The scientific input of meteorites from Morocco is outstanding. Their classification was a response to commercial needs than scientific considerations. We are concerned by developing an ethical and scientific study protocol of meteorites recovered in Morocco. The Northwest Africa (NWA) nomenclature has accepted the absence of documentation for nume...

We present a description of opaque minerals, opaque mineral compositions, magnetic properties, and paleomagnetic record of the Tissint heavily shocked olivine-phyric shergottite that fell to Earth in 2011. The magnetic mineralogy of Tissint consists of about 0.6 wt% of pyrrhotite and 0.1 wt% of low-Ti titanomagnetite (in the range ulvöspinel 3-15 m...

We discuss the problem of meteorites coming from Morocco and surrounding countries and their nomenclature as North West Africa NWA meteorites that is not always the more appropriate nomenclature especially for those with known find places.

NWA 5363 was found in 2008 in the South East of Morocco. This sample exhibits specific mineralogical, petrographical and geochemical characteristics which distinguish it from all other achondrite groups.

We present the new IIAB iron meteorite from High Atlas mountains in Morocco that we submitted under the name Agoudal.

Isli and Tislit lakes (High Atlas Mountains, Morocco) were recently proposed as impact structures, related to the Agoudal iron meteorite found about twenty km from the lakes. Our study did not provide any evidence for such an origin.

Tissint (Morocco) is the fifth martian meteorite collected after it was witnessed falling to Earth. Our integrated mineralogical, petrological, and geochemical study shows that it is a depleted picritic shergottite similar to EETA79001A. Highly magnesian olivine and abundant glass containing martian atmosphere are present in Tissint. Refractory tra...

We have selected several points in a thin section of Tissint in order to characterize the main minerals forming this meteorite through Raman spectroscopy, and particularly search for shocked minerals.

Here we report on the chemical diversity of the polar fraction in the methanol extracts of different Tissint sample fractions (crust, bulk, olivine macrocrists, vitrifications) using high field ultrahigh-resolution mass spectrometry.

Tissint is the fifth Martian meteorite fall known. It's an exceptional shergottite as it's very fresh without any terrestrial alteration. We present in this abstract, field evidences, the mineralogy, petrography and geochemistry of Tissint.

Assessing the metamorphic type of enstatite chondrites cannot rest on the Fe-Mg exchange among silicates. Looking for a reliable index we studied the distribution of cations Fe and Mn among the sulphides daubreelite and alabandite.

Noble gas studies in the martian meteorite fall Tissint gave an exposure age of 1.0 Ma and also show excess 82Kr due to (n, gamma) reactions on Br, indicating >22 cm preatmospheric size. Presence of Mars atmospheric component is indicated by 129Xe.

We present here a report following the Second Arab Impact Cratering and Astrogeology Conference that took place in Casablanca in November 2011. It includes a summary of the main results presented at this meeting and recent developments in impact science in the Arab world. Known and potential impact structures in this region of the world are present...

We report all last meteorite falls and meteors in Morocco, including Benguerir, Tamdakht and Tissint falls. We also show the importance of Moroccan hunters in the recovery of meteorites. A meteor observation network is important in this area.

The poster presents the first results french-Moroccan project for the studies of impact processes. The project includes in particular impact flash monitoring on the moon, meteorite recovery and the search for impact craters in Morocco.

The Karakul depression in the Pamir is a controversial structure and could be a large (50 km) and young impact crater. We present the preliminary results of a sampling campaign that took place in June 2011, which tends to confirm the impact origin.

We launched in 2012 a collaborative project for a systematic search of potential impact structures in Morocco. Several students, under the supervision of researchers, are investigating subdivided parcels of the country, marking circular objects.