Abstract Atbara city is located between the Nile and Atbara rivers, approximately 300 km northeast of Khartoum. The Atbara porphyry gold–copper system is situated at eastern part of Atbara about 70 km in the Red Sea Hills, Neoproterozoic Arabian–Nubian Shield, NE Sudan. The gold‑copper system is observed within different colored quartz veins that fill the tectonic zones in metasomically altered felsic-acidic igneous rocks Gold mineralization in the Atbara is observed in an area of 200 km2 and represented with pyrite, pyrrhotite, chalcopyrite, gold, galena, chalcocite-covellite, tetrahedrite-tennantite, hematite and goethite in the mineralized zone of the study area. The white and brown color quartz veins had E-W, NE-SW and NW-SE directions in these sectors and thickness between 5 and 300 cm. White color quartz samples had low concentration between 0.2 and 1.5 ppm and brown color quartz samples had high gold concentrations ranging from 1.0 to 26.63 ppm. Au does not have positive correlation with other elements, only except for Te and W. In contrast, there is no significant relationship between gold and copper in areas where copper is observed intensively. Cu has positive correlation with Bi, Cd, Pb, U, Hg and Ag. The average ΣREE contents in the hydrothermally altered wall rocks, copper mineralization and the quartz veins ranged from 10.2 ppm for Sector SA (SA, SB, SC, SD, SE and SF are the mining operation areas in the study area), to 14.27 ppm for Sector SB, 1.05 ppm for Sector SC, 20.89 ppm for Sector SD, 3.49 ppm for Sector SE, and 36.33 ppm for the Sector SF. The most of the studied samples have negative Ce and positive Eu anomalies with the LREE enrichment. This showed that it have low oxygen fugacity in the resource area of the hydrothermal solutions and an alkali magmatic source indicating an early stage of magmatic differentiation.

中文翻译：

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红海山中的 Atbara 斑岩金-铜系统，新元古代阿拉伯-努比亚地盾，苏丹东北部

摘要 阿特巴拉市位于尼罗河和阿特巴拉河之间，距喀土穆东北约 300 公里。Atbara 斑岩金铜系统位于 Atbara 东部约 70 公里的红海丘陵，新元古代阿拉伯-努比亚地盾，苏丹东北部。在不同颜色的石英脉内观察到金铜系统，这些石英脉充满了交代蚀变的长英酸性火成岩的构造带 阿特巴拉的金矿化在 200 平方公里的区域内被观察到，以黄铁矿、磁黄铁矿、黄铜矿、金、方铅矿为代表、研究区矿化带的辉铜矿-铜钴矿、四面体-天南星石、赤铁矿和针铁矿。白色和棕色石英脉在这些扇区中具有 EW、NE-SW 和 NW-SE 方向，厚度在 5 至 300 cm 之间。白色石英样品具有 0.2 至 1.5 ppm 的低浓度，棕色石英样品具有 1.0 至 26.63 ppm 的高金浓度。Au与其他元素不存在正相关，只有Te和W除外。相比之下，在铜被密集观察的地区，金和铜之间没有显着的相关性。Cu与Bi、Cd、Pb、U、Hg和Ag呈正相关。热液蚀变围岩、铜矿化和石英脉中的 ΣREE 平均含量从 SA 区的 10.2 ppm（SA、SB、SC、SD、SE 和 SF 是研究区的采矿作业区）到 14.27 ppm SB 部门，SC 部门 1.05 ppm，SD 部门 20.89 ppm，SE 部门 3.49 ppm，SF 部门 36.33 ppm。大多数研究的样品具有负 Ce 和正 Eu 异常与轻稀土富集。这表明它在热液资源区具有低氧逸度和碱性岩浆源，表明岩浆分异的早期阶段。