In-situ sulfur isotope and trace element compositions of …
The Haweit gold deposit is located in the Neoproterozoic Hamisana Shear Zone in the Red Sea Hills of NE Sudan. In this study, we use major and trace element chemistry of pyrite, SEM studies, as ...
Ore Deposits in the Arabian-Nubian Shield | Request PDF
Formation of the Um Rus intrusion and gold-bearing quartz veins can be related to the evolution of the Wadi Mubarak shear belt, where the granitic intrusion formed during or just subsequent to D2 ...
Distinguishing the Type of Ore-Forming Fluids in Gold
The gold-bearing quartz vein occurrences are structurally controlled by the NE-trending shear zone and hosted in Neoproterozoic low-grade metamorphic rocks (Xie et al., 2022). The characteristics presented above are consistent with those of orogenic gold deposits worldwide (Goldfarb & Groves, 2015). Therefore, the Jinkeng and Huanggou deposits ...
Tectonic record and gold mineralization in the central part …
The WG03 and Central Zone ore veins are associated with free gold mineralization and gold grades up to 30 g/t Au. Gaboury et al. (2020) observed the same major ore-bearing structures at Central Zone and WG03, with similar metamorphic, carbon-rich aqueous fluid signature for both deposits. They also attributed the mineralization event to the KSZ ...
Orogenic gold in the Egyptian Eastern Desert: Widespread gold
Possible gold-bearing porphyry systems, but with features described as overlapping Fe-oxide-Cu-Au (IOCG) systems, are represented by Au-Cu-Mo-bearing alteration zones and quartz veins in the central (Hamash) and northern parts (Wadi Dara, South Um Monqul) of the Eastern Desert (Fig. 2) (e.g., Botros and Wetait, 1997; Wetait and Botros, 1997 ...
Mineralogical siting and distribution of gold in quartz veins …
Two main ore types mined from the deposit are gold-bearing quartz veins, and gold-sulfide disseminations in metasediments and metavolcanics. ... whereas at Ashanti and Konongo, arsenopyrite is the principal host of refractory gold. Quartz vein ores According to Blenkinsop et al. (1994), the auriferous quartz veins at the Ashanti mine are ...
Ore Geology Reviews
The orebody consists primarily of gold-bearing quartz sulfide veins. Currently, the metallogenic mechanism of the deposit remains largely unexplored. Utilizing results from the mineralogical observation of principal ore minerals, LA-ICP-MS trace element analysis, and in-situ sulfur isotope analysis of pyrite, investigations reconstruct the ...
Mining in Ancient Egypt and Nubia
Old Kingdom gold mining techniques continued with in situ crushing of the gold‐bearing quartz vein systems, but two new basic types of stone hammers were developed: an oval stone axe of 2–5 kg weight (Fig. 7) with a chiselled notch for a forked wooden stick and a more or less cylindrical one‐handed stone hammer with a ergonomically formed ...
Microthermometric, Laser Raman Spectroscopic, and Volatile …
Fluid inclusions in quartz and scheelite from flat, steeply dipping central, and stockwork-type quartz veins within the Muruntau Au-bearing quartz vein ore field have been investigated in a reconnaissance study, using fluid inclusion mapping, microthermometry, laser Raman spectroscopy, and integrated gas and ion chromatography for bulk volatile and cation-anion …
Genesis and mineralization style of gold occurrences of …
T (°C): trapping temperature of the ore-forming fluid; δ 18 O V-SMOW (‰): oxygen isotope value measured from gold-bearing veins; δ 18 O fluid (‰): calculated oxygen isotope value of fluid based on the oxygen isotope value for gold-bearing vein and the trapping temperature of fluid inclusions, using the equation of Clayton et al. (1972).
Gold Deposits in the Northern Nubian Desert, Sudan
The study investigated the primary gold deposits and the alluvial gold deposits of the Nubian Desert in NE Sudan between 31°E and 32°E., The primary gold deposits of Abu Sari, Duweishat, Saras ...
In-situ sulfur isotope and trace element compositions of …
The Haweit gold deposit is located in the Neoproterozoic Hamisana Shear Zone in the Red Sea Hills of NE Sudan. In this study, we use major and trace element chemistry of pyrite, SEM studies, as well as the sulfur isotope composition of pyrite from the deposit to characterize the mineralization, origin of the ore-forming fluids and to constrain the ore-forming processes.
Carbonic fluids in the Hamadi gold deposit, Sudan: origin …
The Hamadi gold deposit is located in North Sudan, and occurs in the Neoproterozoic metamorphic strata of the Arabian–Nubian Shield. Two types of gold …
PorterGeo Database
The Hassai (or Ariab) cluster of gold deposits are located in the Red Sea Hills desert in north-eastern Sudan, ~200 km west of Port Sudan and 500 km NE of Khartoum (#Location - Hassai: …
Assessment of Gravity Deportment of Gold-Bearing Ores: …
This study investigated the potential of low-grade gold deposits in modern mining, particularly in the context of declining high-grade resources. The primary method for processing these ores was gravity separation with the Knelson concentrator. A GRG test (gravity recoverable gold test) was conducted on two gold-bearing samples: a polymetallic Cu-Zn-Au ore from Zlaté …
Carbonic fluids in the Hamadi gold deposit, Sudan: Origin …
The Hamadi gold deposit, located in North Sudan, occurs in the Neoproterozoic metamorphic strata of the Arabian-Nubian Shield (ANS). CO2-rich inclusions are commonly seen in gold-bearing quartz ...
Carbonic fluids in the Hamadi gold deposit, Sudan: origin …
The Hamadi gold deposit is located in North Sudan, and occurs in the Neoproterozoic metamorphic strata of the Arabian–Nubian Shield. Two types of gold mineralization can be discerned: gold-bearing quartz veins and altered rock ores near ductile shear zones. The gold-bearing quartz veins are composed of white to gray quartz associated …
(PDF) Gold in Egypt
The contrast in conductivity between gold-bearing ore bodies and host . ... network of gold-bearing quartz veins that have been historically mined for gol d. 2.1.2 Placer Deposits:
6000 years of gold mining in Egypt and Nubia
The gold-bearing quartz veins in several occurrences are controlled by D2 and D3 shear zones that cut heterogeneously deformed serpentinites, sheared metavolcanic rocks and gabbro-diorite intrusions.
Geology & Mineralization – Sudan's Leading Mining Company
Arabian-Nubian Shield comprises an assemblage of volcanic arc and sub-arc strata that are fertile for volcanogenic massive sulfide (VMS) and overlying oxide gold deposits. 50 VMS deposits …
Ore Deposits in the Arabian-Nubian Shield | SpringerLink
Gold-bearing quartz veins hosted by fresh Younger Gabbro intruded by granite are recorded in Zalm mine, Central Saudi Arabia (Harbi et al. 2003; ... 65–120 km to the west of Abu Imama harbor north of Port Sudan. The ore minerals are mainly magnetite, hematite, and some goethite. Three ore bodies have been evaluated giving a total of 13 ...
Oolithic iron ore deposits in the Nubian Formation of the …
The matrix varies between 10%-20% by volume and detritus quartz in other component my reach up to 30% by volume in sandy massive ore. Ooids size ranges from 0.2mm-1.00 mm on average in very coarse ...
Volatile Composition of Fluid Inclusions in Gold-Bearing …
About 59 samples of gold-bearing quartz veins were analyzed . Samples are from more than 20 different sites scattered in a large area of 250 km (NW-SE) by 100 km (SW–NE) …
6000 years of gold mining in Egypt and Nubia
The only present-day gold producer in NE Sudan is the Sudanese-French (GRAS–BRGM) joint venture operation of Ariab (Bakhiet and Matheis, 1993; Wipfler et al., 1999). At this locality high quality gold ore is mined in an extreme intensively leached SEDEX-deposit, occurring in a sequence of highly folded acid volcanics of mainly rhyolitic ...
Gold-bearing quartz veins in the Northwestern Nubian …
Vein section of gold-bearing quartz-boudin (light-grey) in muscovite schist from the Abu Sari gold mining area, Sudan, collected in 1984 by Dr. Günter Grundmann.
Mineral Deposits and Occurrences in the Arabian–Nubian …
Au-bearing quartz/quartz-carbonate veins and their alteration occurring along the shear zone and cutting/wrapping ... gold ore in Hamissana area, NE Sudan was used to test the DF predictive model ...
Schematic development of goldbearing quartz veins within …
Orogenic gold ores of Arabian-Nubian Shield are structurally controlled by Najd Fault System. The Najd Fault System controlled the exhumation of the metamorphic complexes and therefore, there is a ...
Characterization and Reprocessing of Artisanal and Small-Scale Gold
Millions of tons of solid waste are generated by artisanal and small-scale gold mining in several regions of the world. This study focused on the tailings from the Abu Hamad artisanal gold mine located in northeastern Sudan. The results of the analyses carried out showed that this amalgam waste contained on average 5.5 g/ton of gold, 50 g/ton of mercury, 3.3 g/ton …
Origin and evolution of gold-bearing fluids in a carbon-rich
Gold concentrations in sulfides from ore bodies (pyrite, pyrrhotite and marcasite) are close to or below the limit of detection. In contrast, gold concentrations in hydrothermal pyrite from veins (Py v) are well above the detection limit for most analytical points (96 %), with an average of 5 ppm Au and a maximum value of 160 ppm Au ...
8 Types of Gold Ore
The most common types of gold quartz ore are rose quartz gold ore and rainbow gold ore. A high gold-quartz ore contains 25% gold by mass, and it occurs in areas where the bedrock is fractured by tectonic and volcanic …