Results 61 to 70 of about 3,405 (219)

Kinetics of arsenopyrite oxidative dissolution by oxygen [PDF]

Geochimica et Cosmochimica Acta, 2006
Abstract We used a mixed flow reactor system to determine the rate and infer a mechanism for arsenopyrite (FeAsS) oxidation by dissolved oxygen (DO) at 25 °C and circumneutral pH. Results indicate that under circumneutral pH (6.3–6.7), the rate of arsenopyrite oxidation, 10 −10.14±0.03  mol m −2  s −1 , is essentially independent of DO over the ...
Forest P. Walker, Madeline E. Schreiber, J. Donald Rimstidt   +2 more
openaire   +1 more source

Geochemistry and U–Pb Zircon Geochronology of Granite at the Pilok Sn–W Deposit, Thailand: Implications for Late Triassic Tin Metallogenesis

Resource Geology, Volume 76, Issue 1, January/December 2026.
Zircon U–Pb dating constrains the Pilok Sn–W granite emplacement at 212–208 Ma, during the Late Triassic post‐collisional extension after the Sibumasu‐Indochina collision. This timing coincides with widespread tin‐bearing granite magmatism throughout Southeast Asia, marking a major regional metallogenic event. ABSTRACT The Pilok Sn–W deposit in western
Mallika Intachai, Ryohei Takahashi, Andrea Agangi, Marlina A. Elburg, Punya Charusiri, Pearlyn Manalo, Hinako Sato, Cendi D. P. Dana, Manuel Nopeia   +8 more
wiley   +1 more source

Re-Os Isotopic Dating of Arsenopyrite from Auriferous Quartz Vein-type Gold Deposits in the Southwestern Margin of Jiangnan Orogen

Yankuang ceshi, 2016
Quartz vein-type gold deposits of Southeastern Guizhou Province in the southwestern margin of Jiangnan Orogen, which are typical orogenic gold deposits, are hosted in Neoproterozoic Banxi Group sub-greenschist facies metamorphic rocks.
GU Shang-yi, DU Ding-quan, FU Yong, SUN Shi-jun, LI Chao   +4 more
doaj   +1 more source

Trace Elements and Sulfur Isotopes of Sulfides at the Leon Sediment‐Hosted Gold Deposit, Ratatotok District, North Sulawesi, Indonesia: Constraints on the Genesis of Ore Formation

Resource Geology, Volume 76, Issue 1, January/December 2026.
The Leon deposit is interpreted as a sediment‐hosted gold deposit with a probable distal intrusion‐centered setting. Hydrothermal fluids migrated through fractures and bedding planes, likely leached sulfur and metals from andesitic rocks, and formed orebodies along bedding planes and at limestone–andesite contacts controlled by permeability contrasts ...
Muhammad Arba Azzaman, Ryohei Takahashi, Pearlyn Manalo, Andrea Agangi, Manuel Nopeia, Hinako Sato, Arifudin Idrus, Doly R. Simbolon, Renaldi Suhendra   +8 more
wiley   +1 more source

Separation of pyrite from arsenopyrite by flotation [PDF]

, 1992
This thesis reports investigations into the flotation separation of pyrite from arsenopyrite using xanthates and the new collectors Fl, S7 and F2B developed by Dow Chemical Company.
Sirkeci, Ayhan Ali
core  

Gold Mineralizing Potential of the Late Triassic Calcareous, Carbonaceous and Sulfide‐Rich Sedimentary Rocks of the Isatomae Formation in the South Kitakami Belt, Japan

Resource Geology, Volume 76, Issue 1, January/December 2026.
Isatomae Formation illustrating mineralogical and geochemical characteristics. (a) Overview of the Isatomae Formation, showing the marine anoxic environment and related biogenic processes. (b) Deposition of metal‐rich Fe oxyhydroxides were transformed into sulfides through diagenesis and low grade metamorphism.
June Born Born, Yasushi Watanabe, Takuya Echigo, Yoshiaki Kon, Takumi Mimura   +4 more
wiley   +1 more source

Staged flotation of arsenopyrite and pyrite from an auriferous concentrate

, 2021
A two-stage flotation separation of arsenopyrite and pyrite was designed for a refractory auriferous concentrate. First stage flotation of gold-rich arsenopyrite carried out at pH 11 after copper activation was achieved using Isopropyl Ethyl ...
Skinner, W., Forson, P., Zanin, M., Asamoah, R.   +3 more
core  

Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism

, 2020
The effects of ZnSO4 on arsenopyrite depression were studied with sodium carbonate and sodium isobutyl xanthate (SIBX) as the pH regulator and collector, respectively.
Fei Li, Zhen Wang, Pingtian Ming, Youguo Guan, Qingqing Xing, Zhuohong Xie   +5 more
core   +1 more source

Thermodynamic Behavior of Pyrite and Arsenopyrite in Preoxidation for Chlorination Leaching of Refractory Gold Concentrate

Journal of Chemistry
Recently, preoxidation is an effective pretreatment method of refractory gold ore, which has been widely used due to the high desulfurization, arsenic removal, low environmental pollution, and rapid reaction rate.
Chang Sok Kim, Un Chol Han, Hyok Sin, Su Rim Hwang, Jong Min Wang   +4 more
doaj   +1 more source

New orogenic type gold occurrences in the Uyanga ore knot (Central Mongolia)

Mongolian Geoscientist, 2018
The Uyanga ore knot district of the Khangay metallogenic zone are hosted by the lower-middle Devonian volcanogenic-sedimentary Erdenetsogt formation.
Ariunbileg Sodov, Olga Gaskova, Altansukh Gankhuyag, Dagva-Ochir Lkhagvasuren, Otgonbaatar Dorjsuren, Oyunchimeg Tumen-Ulzii, Battushig Altanbaatar   +6 more
doaj   +1 more source