The Djilouet complex forms a cupola made up of leucocratic granites associated with Sn-W mineralization. It could represent the Hoggar’s easternmost rare metal granite (RMG) comparatively to those of the Taourirt province in the central Hoggar. It is located in the Djanet terrane, 12 km NE of the town of the same name in the far east of the Tuareg shield in Algeria. The Djanet terrane is made of a thick low-grade (greenschist facies) sedimentary sequence which was intruded by several generations of granitic rocks. The subcircular Djilouet body is made of leucocratic granites with progressive mutual transitions. Most of the outcrop is occupied by a porphyritic coarse-grained biotite granite. A muscovite granite is found in the center of the cupola, whereas a garnet (almandine—spessartite) granite forms a discontinuous rim all around it. Black micas from the biotite granite are lithian annite (“protolithionite”). The white micas from the muscovite granite and the garnet granite are classified as Fe-Li muscovite. The muscovite granite and the garnet granite contain accessory minerals as rutile, xenotime, monazite, zircon, and minerals that may be members of the pyrochlore supergroup. All the facies are leucogranite with high SiO₂ content and high K₂O-Na₂O ratio. They are poor in calcium and in mafic components and have very low phosphorus content (P₂O₅ ~ 0.1%). The peraluminous composition is low to mild (1.08 < A/CNK > 1.46). The evolved granites of the Djilouet suite are enriched in Th and U, but the tantalum and the niobium are not highly concentrated (Ta + Nb = 10.4–17.1). The total REE content is low (57–84 ppm), and the patterns are typically wing shaped with a strong negative Eu anomaly and a small tetrad effect. The Sn-W mineralization consists two systems of veins: large quartz veins with ferberite (H/F ~ 0.8) and quartz veinlets or stockworks with homogeneous cassiterite and minor wolframite (H/F ~ 48). The iso-content contours of tin and tungsten, as produced from a sampling covering the whole cupola, overlap very little. The differences which were noted throughout the study between the Taourirt granites and those of the Djilouet suite are to be related to the lithological nature of the crust rather than to a difference in the geodynamic environment.

Djilouet复合体形成由白云岩花岗岩组成的冲天炉，与锡-钨矿化有关。与霍加尔中部的陶里尔特省相比，它可以代表霍加尔最东部的稀有金属花岗岩（RMG）。它位于Djanet地形，在阿尔及利亚Tuareg盾牌的最东面，同名城镇东北12公里。Djanet地层由厚厚的低品位（绿片岩相）沉积序列构成，并被几代花岗岩岩侵入。次圆Djilouet主体由渐进的相互过渡的白垩纪花岗岩制成。大部分露头都由斑状的黑云母花岗岩构成。在冲天炉的中心发现了白云母花岗岩，而石榴石（金刚烷-倍碳石）花岗岩在其周围形成了不连续的边缘。来自黑云母花岗岩的黑云母是锂质堇青石（“原生锂蒙脱石”）。来自白云母花岗岩和石榴石花岗岩的白云母被分类为铁锂白云母。白云母花岗岩和石榴石花岗岩包含辅助性矿物，如金红石，xenotime，独居石，锆石和可能是烧绿石超族成员的矿物。所有的相都是具有高SiO的白云石₂含量高的K ₂ O-Na ₂ O比。它们的钙和镁铁质成分很差，磷含量非常低（P ₂ O ₅ 〜0.1％）。铝质成分低至中等（1.08 <A / CNK> 1.46）。Djilouet套件中演化出的花岗岩富含Th和U，但钽和铌的含量不高（Ta + Nb = 10.4-17.1）。稀土元素的总含量很低（57-84 ppm），且图案通常呈翼形，具有强烈的负Eu异常和较小的四分体效应。锡-钨矿化由两大脉脉系统组成：带有镁铁矿的大石英脉（H / F〜0.8）和带有均质锡石和次要黑钨矿的石英脉或储层（H / F〜48）。由覆盖整个冲天炉的采样产生的锡和钨的等含量轮廓几乎没有重叠。