Based on new U–Pb zircon data, field structural analysis and a detailed petrological study of the plutonic and high-grade metamorphic rocks of the Hammar Domain (Southern Ethiopian Shield) overall geodynamic scenario was inferred, bringing broad implications for the East-African Orogeny. The structural evolution of the Hammar Domain can be summarized into four phases, D₁ to D₄, resulting in (a) relict compositional banding (S₁), (b) flat-lying migmatite foliation (S₂) defining the primary contacts of granulites and migmatites, (c) superimposed steeply dipping N–S trending compressional foliation (S₃) due to regional ~E–W oriented compression and (d) later ~NW–SE trending left-lateral transpressive fabric (S₄). New geochronological data point to long-lasting orogenic convergence forming the East-African Orogeny which resulted in two main geodynamic events: (a) Late Tonian to late Cryogenian episode (ca. 770 to 650 Ma) where large volcanic arc construction as the source of rock photoliths (dated at ca. 770 Ma) was followed by crustal accretion and flat-lying fabrics origin (D₂ stage), intense migmatization and HT-MP metamorphism (T: 700–850 °C and P: 0.7–0.9 GPa) at depths of ~25–35 km (dated at ca. 720 and 715 Ma). (b) Late Cryogenian to early Ediacaran episode (ca. 650 to 620 Ma) as the key era of continental collision leading to the Greater Gondwana assembly. An early ~E–W oriented compression (D₃ stage) resulted in ~N–S trending fabrics that have been continuously changed to the left-lateral transpression (D₄ stage) forming ~NW–SE oriented foliations. The time-scale of D₃ and D₄ events is inferred by syn-tectonic granitoid intrusions yielded at ca. 648 Ma and ca. 630 Ma respectively. Furthermore, the syn- to post-tectonic leucogranite dike, dated at ca. 630 Ma, marks the upper limit for the ductile or brittle-ductile deformation and regional metamorphic events.

基于新的 U-Pb 锆石数据，对哈马域（埃塞俄比亚南部地盾）的深成岩和高品位变质岩进行的现场结构分析和详细的岩石学研究推断出整体地球动力学情景，为东非造山带带来了广泛的影响. Hammar 域的结构演化可以概括为四个阶段，D ₁到 D ₄，导致 (a) 残余成分带 (S ₁ )，(b) 平躺混合岩理理 (S ₂ ) 定义了主要接触麻粒岩和混合岩，（c）由于区域~E-W 方向的压缩和（d）后来~NW-SE 向左横向压缩织物（S ）叠加急剧倾斜的 N-S 趋势压缩叶理（S ₃）₄）。新的地质年代学数据表明，形成东非造山运动的长期造山汇合导致了两个主要的地球动力学事件：(a) 托尼阶晚期至低温纪晚期（约 770 至 650 Ma），其中大型火山弧构造作为岩石光石（约 770 Ma）之后是地壳增生和平躺织物起源（D ₂阶段）、强烈的混合作用和 HT-MP 变质作用（T：700-850 °C 和 P：0.7-0.9 GPa）在约 25-35 公里的深度（日期为约 720 和 715 Ma）。(b) 低温纪晚期至埃迪卡拉纪早期（约 650 至 620 Ma）是大陆碰撞导致大冈瓦纳大陆集合的关键时期。早期的~E-W 定向压缩（D ₃阶段）导致~N-S 趋势的织物不断变化为左侧压缩（D ₄阶段），形成~NW-SE 取向的叶理。d的时间尺度₃和d _4级的事件是由推断合成在约产生-tectonic花岗岩类侵入 648 马和约。分别为 630 毫安。此外，同为后构造的白质花岗岩堤防，日期约为 2000 年。630 Ma，标志着韧性或脆性-韧性变形和区域变质事件的上限。