This paper reports results of studies on the influence of the crystallographic mineral structure on the process of pyrite and marcasite leaching. Kinetic studies show that the crystallographic structure of minerals like FeS2 type does not influence the efficiency of the process.

This paper proposes that gradual changes in the composition of volatiles that have been added to the atmosphere-ocean system are responsible for the Great Oxidation Event (G.O.E.) ca. 2.3 Ga. Before ca. 2.3 Ga, the composition of these volatiles was probably such that 20% of the carbon gases could be reduced to organic matter and all of the sulfur gases could be reduced to pyrite. Since 2.3 Ga,...

a r t i c l e i n f o The interfacial electronic properties and charge transfer characteristics of pyrite, FeS 2 , are greatly influenced by the presence of electronic states at the crystal free surface. We investigate the surface electronic structure of FeS 2 (100) using scanning tunneling spectroscopy (STS) and interpret the results using tunneling current simulations informed by density func...

Understanding the dynamics of deep-sea hydrothermal plumes and depositional pattern particles is essential for tracking submarine venting site, prospecting polymetallic sulfide resources, as well deciphering biogeochemistry cycling marine elements. In this paper, a numerical model plume established based on topography long-term current monitoring data Wocan-1 field (WHF-1), Carlsberg Ridge, Nor...

The northern flank of the North China Craton (NCC) hosts a linear zone gold, molybdenum, silver, lead, and zinc polymetallic ore deposits. Among these, Yingfang Pb-Zn-Ag deposit is located in central part Yanshan–Liaoxi metallogenic belt (YLMB) which extends for approximately 1000 km forms major mineralized zone. In this study, we characterize mineralization trace genesis based on new sulfur le...

The Luyuangou gold deposit is located in the eastern section of Xiong’ershan Au-Ag polymetallic district (XESPMD) and consists a few gold-bearing veins found EW-striking faults Archean Taihua Mesoproterozoic Xiong’er Groups. deposits contain numerous pyrites thin quartz veins, representing an ideal tool for explaining enigmatic genesis XESPMD. distributions trace elements sulfur isotopes pyrite...

VI.1-HIGH MOLECULAR WEIGHT INORGANIC COMPLEXES Large polymetallic complexes are potentially useful molecules in a variety of areas. Photochemically active compounds are under investigation as efficient photoinitiators for solar-energy conversion, catalysts, and as selective “light-activated anticancer drugs”. On a molecular level, these large organometallic species typically contain light-absor...

Massive Zn-Cu-Fe sulfide deposits at the Garon Lake Mine occur in three sulfide lenses in a group of metamorphosed rhyolite crystal tuffs, metasediments and basalts. The major ore minerals are sphalerite, chalcopyrite, pyrrhotite and pyrite. Minor associated silicates are actinolite, tremolite, chlorite, albite and quartz. Rounded detrital pyrite, magnetite and chert grains and diagenetic p...

in this research work, the dissolution of chalcopyrite was investigated under atmospheric pressure, with sulfate media at low temperatures, in 30°c to 50°c. in the galvanic interaction between chalcopyrite and pyrite, pyrite is used as a leaching catalyst. effects of different parameters such as temperature, stirring speed, pyrite to chalcopyrite ratio, particle size, and solution potential wer...