Metal remobilization and ore-fluid perturbation during …
Mineral-scale episodic replacement of auriferous pyrite by texturally-complex pyrite, marcasite and minor arsenopyrite occurred in breccia ores from the Daqiao epizonal orogenic gold deposit, West Qinling Orogen, China. This study uses a novel combination of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP …
Auriferous pyrite Re–Os geochronology and He-Ar
Auriferous pyrite He–Ar isotopic analyses indicate that the ore-forming fluid was a mixture of mantle-derived and crustal fluids. ³He/⁴He ratios are in the range 1.72–3.92 Ra, corresponding ...
Morphological, thermoelectrical, geochemical and isotopic …
(a) The whole element content of auriferous pyrite in the placer deposits of Bagrote valley (Fe, S and As are in % and the other elements are in ppm). 1: epithermal gold deposit, 2: magmatic hydrothermal gold deposit, 3: metamorphic hydrothermal gold deposit, 4: Carlin-type gold deposit, 5: Bagrote valley placer deposit (this study) (b) The ...
Rare Earth Element and trace element features of auriferous pyrite …
Five generations of pyrite have been identified in diagenetic-metanogenic process, based on the crosscutting relationships of different auriferous veins, ore textures, and mineral paragenesis.
Auriferous pyrite formed by episodic fluid inputs in the …
replacemen t of primary pyrite by Cu-rich pyrite. Several trace el ements incl uding As, Au, Bi, Co, Cu, Ni, Pb, Sb, Te, and Tl were de tected in more th an half of the LA-
Metal remobilization and ore-fluid perturbation during …
Mineral-scale episodic replacement of auriferous pyrite by texturally-complex pyrite, marcasite and minor arsenopyrite occurred in breccia ores from the Daqiao epizonal orogenic gold deposit, West ...
Investigating the selective flotation of auriferous arsenian pyrite …
The study was extended to the flotation of an auriferous refractory ore where similar observations were made. 62.7% rejection of pyrite was achieved in the staged flotation process. View Show abstract
Trace-element geochemistry of pyrite and arsenopyrite: ore …
Alam, Masroor Li, Sheng-Rong Santosh, M. Shah, Attaullah Yuan, Mao-Wen Khan, Hawas Qureshi, Javed Akhter and Zeng, Yong-Jie 2019. Morphological, thermoelectrical, geochemical and isotopic anatomy of auriferous pyrite from the Bagrote valley placer deposits, North Pakistan: Implications for ore genesis and gold exploration.
CRYSTALLOGRAPHIC CONTROLS ON TRACE-ELEMENT INCORPORATION IN AURIFEROUS
The distribution of gold and other trace elements in the ore-stage pyrite from the high-sulfi dation Au–Ag–Cu Pascua deposit in the El Indio belt in north-central Chile was studied using electron-microprobe and secondary-ion mass spectrometry (SIMS) imaging and analysis. The images show that concentrations of Au and Cu are concentrically …
Minerals | Free Full-Text | Origin of Disseminated Gold …
Here, we present new data about microtextures; the chemical composition and stable sulfur isotopes of auriferous pyrite-3 and arsenopyrite-1 from proximal alterations in sediment-hosted (Malo–Taryn, Badran, Khangalas); and intrusion-hosted (V'yun, Shumniy) orogenic Au deposits in the central sector of the Yana–Kolyma …
Geochemical and isotopic composition of auriferous pyrite …
The auriferous pyrite is characterized by high Co content, high Co/Ni ratios, low Mo/Ni ratios and low Ni content indicating a mafic to ultramafic provenance. Metal …
Metal remobilization and ore-fluid perturbation during …
Two economic styles of breccia, tectonic and hydraulic breccias, have been identified in the mine (Fig. 2).The strongly silicified tectonic breccia A contains disseminated auriferous pyrite and marcasite (up to 4 g/t; Fig. 2 a and b). Tectonic breccias with high competence were hydraulically brecciated (Fig. 2 c) and the resultant hydraulic breccia …
Gold-bearing Pyrite: Mineral information, data and …
A gold-bearing variety of pyrite. Possibly a mixture of pyrite with submicroscopic native gold inclusions. Mindat relies on your donations to survive click here to help today!
(PDF) Bulk flotation of auriferous pyrite and arsenopyrite …
Laboratory and industrial scale experiments were conducted to investigate the effect of tertiary dodecyl mercaptan (TDM) as a collector on the flotation of auriferous pyrite and arsenopyrite.
The flotation of auriferous pyrite with a mixture of collectors
In another study on an auriferous pyrite ore, it was observed that gold and uranium flotation performance were enhanced when using mixtures of xanthate and trithiocarbonate (Makanza et al., 2008 ...
Auriferous pyrite formed by episodic fluid inputs in the …
Auriferous pyrite formed by episodic fluid inputs in the Akeshi ... Pyrite is the main sulfide mineral in all samples analyzed (Fig. 4,Table1). In some samples, pyrite is spatially asso-
Texture and geochemistry of pyrite from the Jinya, Nakuang …
However, the δ 34 S values of auriferous pyrite range from –9 ‰ to –5 ‰, –5 ‰ to + 5 ‰, and + 5 ‰ to + 19 ‰ in these gold deposits with host rocks deposited in the basin facies, open platforms, and slope facies around platforms, respectively. Thus, it is demonstrated that the sulfur isotope compositions of auriferous pyrite ...
Auriferous Pyrite? | TreasureNet The Original Treasure …
Auriferous means "gold bearing rock". If there is gold in the pyrite it will be finely divided free milling gold. Generally recovery is difficult with poor returns when the gold is contained in the pyrite but there are notable exceptions. Most of the producing mines in North Carolina were worked before 1850.
The flotation of auriferous pyrite with a mixture of collectors
The auriferous pyrite ore (80% passing 100 µm) used in this study was collected from the feed to the flotation circuit at No. 2 Gold Plant. Typical chemical and mineralogical compositions are shown in Table 1, Table 2. After filtration, approximately 500 kg of the material was dried at about 60 °C for 48 h, screened at 850 µm to break any ...
Auriferous pyrite formed by episodic fluid inputs in the …
Our LA-ICP-MS depth profiles suggest that Au in the analyzed pyrites is present both in solid solution and as sub-micron polymetallic Au …
Processing an Auriferous Pyrite Concentrate in the Presence …
Abstract. An industrial concentrate (consisting mainly of pyrite and arsenopyrite) was further enriched by xanthate flotation of pyrite using various reducing sulfur-containing agents as arsenopyrite depressants, that is, …
Auriferous pyrite formed by episodic fluid inputs …
Auriferous pyrite formed by episodic fluid inputs in the Akeshi and Kasuga high-sulfidation deposits, Southern Kyushu, Japan. CC BY 4.0. Authors: Mizuki Ishida. Kwansei Gakuin University. Rurik...
CRYSTALLOGRAPHIC CONTROLS ON TRACE-ELEMENT INCORPORATION IN AURIFEROUS
The distribution of gold and other trace elements in the ore-stage pyrite from the high-sulfidation Au–Ag–Cu Pascua deposit in the El Indio belt ... Anthony E. Williams-Jones; CRYSTALLOGRAPHIC CONTROLS ON TRACE-ELEMENT INCORPORATION IN AURIFEROUS PYRITE FROM THE PASCUA EPITHERMAL HIGH-SULFIDATION …
Geochemical and isotopic composition of auriferous pyrite …
Auriferous pyrite grains in the Yongxin gold deposit are mostly homogenous in composition with respect to mineral structure and trace-element characteristics. The Au and Ag mostly precipitated in anhedral pyrite grains in Au-Ag-bearing minerals including calaverite, electrum and petzite. The concentration of gold in pyrite is higher as …
Crystallographic Controls on Trace-Element Incorporation in Auriferous …
Pyrite is an important mineralogical component of most sulphide ore deposit classes, where it commonly forms part of the gangue mineralogy, but may also represent an important ore mineral (i.e ...
Late Jurassic to Early Cretaceous age of the Daqiao gold
The intimate textural relationships between auriferous pyrite and each sericite type suggest that dating of such sericite can provide useful constraints on the age of gold mineralization at Daqiao. Methods. LA-ICP-MS zircon U–Pb dating. Six granodiorite dyke (samples DQ44, DQ55, DQ63, DQ123, DQ158, and DQ161) and one diorite …
3D Characterization of Auriferous Pyrite Flotation Samples …
The liberation and exposure of auriferous pyrite in the flotation feed and tail samples from the Kensington plant operations have been studied using micro-XCT. Based on the liberation analysis, the sulfide minerals have a satisfying extent of liberation for the particle size below 212 μm. Theoretical maximum grade-recovery curves have been ...
Selective separation of arsenopyrite from an auriferous pyrite
The industrial concentrate, used in this work, is an auriferous bulk pyrite- arsenopyrite flotation concentrate which is considered as a problematic "waste", due to its arsenic content. A positive relationship exists between the arsenic and gold contents of this product (Matis et al., 1992 ).
The flotation of auriferous pyrite with a mixture of collectors
The auriferous pyrite ore (80% passing 100 µm) used in this study was collected from the feed to the flotation circuit at No. 2 Gold Plant. Typical chemical and mineralogical compositions are shown in Table 1, Table 2.After filtration, approximately 500 kg of the material was dried at about 60 °C for 48 h, screened at 850 µm to break any …
Flotation of auriferous arsenopyrite from pyrite using …
Pyrite and arsenopyrite from a Peruvian Mine was acquired through GeoDiscoveries Australia. Laths of dimension 8 mm × 6 mm × mm were cut from the mineral samples using Struers minitom precision cutting diamond saw. The samples where them progressively polished using abrasive paper with 240, 400, 600 and 1200 grit size.
