The Pan-African (578–563 Ma, U-Pb zircon age) Dschang granitic pluton belongs to the edge of the central domain of the Central African Fold Belt in Cameroon. It is made up of biotite granites that intruded pre-Pan-African biotite-hornblende orthogneiss basement. A new detailed structural study testifies that this area recorded four deformation phases (D₁-D₄). The D₁-related structures described in the basement rocks are folded. They were progressively transposed into the main S₂ foliation during D₂ deformation which is synchronous with the emplacement of E-W granitic dykes. The D₂ strikes NNW-SSE to NW-SE. It is characterized by main S₂ metamorphic foliation (mean pole of the whole data at 269°/66°), NW–SE low to moderate plunging lineations (mean lines of the whole data at 159°/15°), F₂ folds with NW plunging axes, C₂ sinistral E-W ductile shear indicators (marked by injection of granite dykes into the biotite-hornblende orthogneiss). The D₃ phase is marked in the biotite-hornblende orthogneiss by C₃ dextral shear planes, followed by dextral rotated boudins (ß₃). In the granites, it is characterized by S₃ magmatic foliation (mean pole of the whole data at 323°/61°) due to the reorientation of platy megacrystals of K-feldspar, F₃ folds profile with moderate plunging axes (mean lines of the whole data at 145°/28°) and sinistral vergence. The D₄ phase is usually ductile. It is characterized by minor faults with C₄ sinistral shear planes which crosscut the S₃ magmatic foliation. The D₂ phase is synchronous with the early emplacement of the Dschang granites at 578 Ma whereas D₃ marks its end at 563 Ma. Mesoscopic (phenocrysts alignment, elongated enclaves, schlierens) and microscopic features (quartz, plagioclase and alkali feldspar deformation microstructures) are consistent with a continuum of deformation from magmatic to submagmatic states in the Dschang granites, the later state being more common. We conclude that the history of the Dschang area began with the emplacement of biotite-hornblende orthogneiss before 578 Ma; it was followed by the emplacement of granite that started towards the end of the D₂ phase at 578 Ma (probably aided by the E-W sinistral shear fractures) and ended during the D₃ phase at 563 Ma. This is consistent with the emplacement of the Dschang granitic pluton during the transition period between the sinistral left lateral wrench movement and the dextral right lateral wrench movement of the history of western Gondwana. However, the scarcity of typical structures of a synkinematic intrusion or a post-magmatic ductile shearing (mylonites, S/C-structures) in the study granite suggests its emplacement into a low strain crustal domain within an anastomosing pattern of shear zones.

泛非（578-563 Ma，U-Pb锆石年龄）Dschang花岗岩岩体属于喀麦隆中非褶皱带中部的边缘。它是由黑云母花岗岩构成的，这些黑云母花岗岩侵入了泛非非洲黑云母-角闪石直立斜纹岩基底。一项新的详细结构研究证明，该区域记录了四个变形阶段（D ₁ -D ₄）。在地下室岩石中描述的与D ₁有关的结构被折叠。它们在D ₂变形过程中逐渐转移到S ₂的主要叶面中，这与EW花岗岩堤的位置同步。D ₂打击NNW-SSE至NW-SE。它的特点是主S ₂变质叶子（整个数据在269°/ 66°处的平均极点），NW–SE低至中度切入线（整个数据的平均线在159°/ 15°处），N ₂切入轴的F ₂倍，C ₂鼻窦EW韧性剪切指示剂（标记为向黑云母-角闪石直立的斜长岩中注入花岗岩堤坝）。该d ₃相被C标注在黑云角闪石片麻岩₃右旋剪切平面，随后右旋旋转布丁（SS ₃）。在花岗岩中，由于钾长石F ₃的片状巨晶的重新取向，其特征为S ₃岩浆页岩（整个数据的平均极点在323°/ 61°）。折线具有适度的下降轴（在145°/ 28°处，整个数据的均值线）和左鼻翼。D ₄相通常是延性的。它的特征是具有C ₄左旋剪切面的小断层，这些断层横切了S ₃岩浆页岩。D ₂相与Dschang花岗岩在578 Ma的早期沉积同步，而D ₃结束于563 Ma。在Dschang花岗岩中，介观（表晶排列，拉长的飞地，裂纹岩）和微观特征（石英，斜长石和碱长石形变微观结构）与从岩浆状态到岩浆状态的连续变形一致。我们得出的结论是，Dschang地区的历史始于578 Ma之前黑云母-角闪石直立蛇麻岩的入侵。随后是花岗岩的堆积，该堆积开始于D ₂相的末期，始于578 Ma（可能是由EW左旋剪切断裂引起的），并在D ₃期间结束相在563 Ma。这与西贡多瓦纳历史上的左向左扳手运动和右向右扳手运动之间的过渡时期的Dschang花岗岩岩体的位置一致。然而，研究花岗岩中典型的运动学侵入体或岩浆后的韧性剪切（mylonite，S / C-结构）的典型结构的稀缺性表明其已进入剪切带的吻合模式内的低应变地壳区域。