In April 2013, I prospect for meteorites in Morocco with a group of friends.
After an unsuccessful search for the Martian meteorite NWA 7397, we met a group of meteorite hunters who took us to the site of a new meteorite discovery on April 18.
The day before, a meteorite of 219 grams was found, the meteorite hunters thought at first that this meteorite was a lunar meteorite.
It finally turns out that this meteorite is not a lunar meteorite but an eucrite.
Other fragments will be discovered later including the supposed main mass (332.85 grams) on April 24, 2013 by Lahcen Oukhouya meteorite hunter and native of Smara.
I was able to acquire the main mass of this fall, as well as 8 other fragments through Ali Oulmaleh (meteorite dealer in Erfoud) and Mohamed Elguirah (meteorite hunter in Tan Tan).
This meteorite was found 120 km northeast of Laayoune in the Western Sahara, in a place called Chwichiya (little fez) in reference to the mountain seen in this region in the shape of a fez.
Chwichiya is an area rich in meteorites, and in particular achondrites, 4 different achondrites have been discovered within a radius of 6 kilometers!
This meteorite is a brecciated eucrite, composed of 11 pieces for a total of 1038 grams. This meteorite has the particularity to have two different textures.
Petrography: Breccia with coarse basaltic clasts in a fine-grained matrix. The matrix has a doleritic texture with plagioclase grain size of several mm. Dominant minerals are exsolved pyroxene and mm-sized calcic plagioclase laths. Minor phases include chromite, silica, Ca-Phosphate, troilite and metal.
In April 2013, I prospect for meteorites in Morocco with a group of friends.
After an unsuccessful search for the Martian meteorite NWA 7397, we met a group of meteorite hunters who took us to the site of a new meteorite discovery on April 18.
The day before, a meteorite of 219 grams was found, the meteorite hunters thought at first that this meteorite was a lunar meteorite.
It finally turns out that this meteorite is not a lunar meteorite but an eucrite.
Other fragments will be discovered later including the supposed main mass (332.85 grams) on April 24, 2013 by Lahcen Oukhouya meteorite hunter and native of Smara.
I was able to acquire the main mass of this fall, as well as 8 other fragments through Ali Oulmaleh (meteorite dealer in Erfoud) and Mohamed Elguirah (meteorite hunter in Tan Tan).
This meteorite was found 120 km northeast of Laayoune in the Western Sahara, in a place called Chwichiya (little fez) in reference to the mountain seen in this region in the shape of a fez.
Chwichiya is an area rich in meteorites, and in particular achondrites, 4 different achondrites have been discovered within a radius of 6 kilometers!
This meteorite is a brecciated eucrite, composed of 11 pieces for a total of 1038 grams. This meteorite has the particularity to have two different textures.
Petrography: Breccia with coarse basaltic clasts in a fine-grained matrix. The matrix has a doleritic texture with plagioclase grain size of several mm. Dominant minerals are exsolved pyroxene and mm-sized calcic plagioclase laths. Minor phases include chromite, silica, Ca-Phosphate, troilite and metal.
TARDA is a meteorite that fell in Morocco on August 25, 2020.
This meteorite has been classified as C2 ungrouped, a rare type of very primitive carbonaceous.
Tagish lake is a meteorite of the same type and sells for over 1000 euros per gram.
This meteorite is composed of many very small fragments, beautiful pieces with crusts are rare.
Isotopic analyses show that some pieces have values close to CI chondrites, and other pieces have Yamato (CY) values..
An important meteorite at the scientific level in the years to come.
Classification : (C. Agee, UNM; K. Ziegler, UNM; A. Irving, UWS; L. Garvie, ASU; D. Sheikh, FSU; P. Carpenter, WUSL; H. Chennaoui Aoudjehane, FSAC; M. Zolensky, JSC; P. Schmitt-Kopplin, HZM) Carbonaceous chondrite (C2-ungrouped). The bulk mineralogy is consistent with a petrologic grade 2, based on the predominance of smectite and serpentine together with the presence of anhydrous mafic silicates, AOA, and chondrules. The oxygen isotopes give a bimodal distribution of the δ18O-values, with one group having values somewhat like those of the CI chondrites, and the other group like values for the Yamato-type (CY) carbonaceous chondrites (King et al., 2019). However, Δ17O values are lower than those for CI and CY chondrites, and plot below the TFL. These isotopic values do not overlap with those of any established carbonaceous chondrite group, hence the ungrouped designation.
Specimens : 18.4 g including one polished thin section and one polished thick section at UWB; 21g and one polished thin section at UNM; 7 g provided by A. Aaronson and 6 g provided by J. Redelsperger at FSAC; 20 g at the Ministry of Energy, Mines and Environment, Rabat, Morocco provided by A. Aaronson; total 628 g with A. Aaronson (including 99 g, 82.4 g and 52.6 g stones); 540 g with M. Farmer and A. Karl, 260 g with J. Poblador; 480 g with D. Dickens; 145 g with M. Oulkouch; 146 g with J. Redelsperger; 31 g with B. Hoefnagels.
Murchison is a meteorite that fell on September 28, 1969 near the village of Murchison, Australia, about 100 km north of Melbourne.
Following the discovery in 2022 in this meteorite of two organic molecules, cytosine and thymine, entering in the composition of DNA and RNA, the debate of the panspermia is relaunched.
Panspermia is a theory about the origin of life that suggests that the seeding of the Earth would come from germs wandering in the cosmos or brought by meteorites or comets.
Even if about 100 kg have been found, this mythical meteorite is now difficult to find on the market.
Jdiriya 005 is an Aubrite meteorite of only 35.6 grams, discovered by Brahim Ikken in 2018 in Morocco.
A new theory carried by a French scientific team talks about the possibility of a link between the Aubrites and the planet Mercury.
To date only 76 such meteorites have been classified.
It is a rare type of meteorite, difficult to find on the market.
The name Aubrites is linked to the fall of a meteorite in Aubres, France in 1836. They are composed mainly of orthopyroxene to enstatite.
Writeup from MB 111:
Jdiriya 005 27°33’23.45″N, 10°31’29.87″W
Saguia el Hamra, Western Sahara
Find: 2018
Classification: Enstatite achondrite (Aubrite)
History: Found by Brahim Ikken in 2018. Bought By Jean Redelsperger from Mohamed Elguirah in 2021.
Physical characteristics: Several irregular dark pieces.
Petrography: (J. Gattacceca, B. Devouard, CEREGE) Coarse-grained unbrecciated rock with granular texture made up primarily of enstatite (61 vol%) with typical grain size 5mm. No relict chondrules are observed. Other silicates are sodic plagioclase (3.6 vol%) with typical gain size 700 μm, and Si-rich glass. Opaque minerals (35 vol%), under the form of mm sized rounded grains, are all weathered except Zn-rich daubreelite that makes up 0.2 vol% of the meteorite.
Geochemistry: Enstatite Fs0.3±0.2Wo0.6±0.1, CaO 0.33±0.06 (n=6). Plagioclase An6.7±0.1Ab89.7±0.1Or3.6±0.1 (n=3). Daubréelite contains up to 6 wt% Zn.
Classification: Aubrite.
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.
Jdiriya 005 is an Aubrite meteorite of only 35.6 grams, discovered by Brahim Ikken in 2018 in Morocco.
A new theory carried by a French scientific team talks about the possibility of a link between the Aubrites and the planet Mercury.
To date only 76 such meteorites have been classified.
It is a rare type of meteorite, difficult to find on the market.
The name Aubrites is linked to the fall of a meteorite in Aubres, France in 1836. They are composed mainly of orthopyroxene to enstatite.
Writeup from MB 111:
Jdiriya 005 27°33’23.45″N, 10°31’29.87″W
Saguia el Hamra, Western Sahara
Find: 2018
Classification: Enstatite achondrite (Aubrite)
History: Found by Brahim Ikken in 2018. Bought By Jean Redelsperger from Mohamed Elguirah in 2021.
Physical characteristics: Several irregular dark pieces.
Petrography: (J. Gattacceca, B. Devouard, CEREGE) Coarse-grained unbrecciated rock with granular texture made up primarily of enstatite (61 vol%) with typical grain size 5mm. No relict chondrules are observed. Other silicates are sodic plagioclase (3.6 vol%) with typical gain size 700 μm, and Si-rich glass. Opaque minerals (35 vol%), under the form of mm sized rounded grains, are all weathered except Zn-rich daubreelite that makes up 0.2 vol% of the meteorite.
Geochemistry: Enstatite Fs0.3±0.2Wo0.6±0.1, CaO 0.33±0.06 (n=6). Plagioclase An6.7±0.1Ab89.7±0.1Or3.6±0.1 (n=3). Daubréelite contains up to 6 wt% Zn.
Classification: Aubrite.
Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.