Key constraints related to the nature of alteration and mineralization in geologically complex economically important iron oxide copper–gold (IOCG) systems remain highly speculative, especially, physicochemical characteristics hydrothermal fluids. This study was conducted on samples from Khetri Copper Belt (KCB) western India that hosts several IOCG-type deposits. The aims constrain qualitative...

The ore mineralogy of a new promising target the Aldan–Stanovoy gold province—the Spokoininsky cluster—is considered. Gold mineralization is represented by volumetric, nonlinear type, unconventional for region; it related to elements fold structures and reverse fault in enclosing metamorphic basement rocks. Vein-disseminated sulfide–(pyrite)–quartz ores build up deposit-like bodies beresites fr...

The Xinjiazui gold deposit, a newly discovered is situated in the northwestern margin of Yangtze Block, China. source and genesis mineralization are poorly understood. It urgent to use H–O isotopic composition quartz geochemistry pyrite evaluate origins Au ore-forming fluids this deposit. Three types were identified, including synsedimentary framboidal pyrites (Py0), directional arrangement pre...

the tajroud vein system is located 190 km southwest of mashhad, and in the southern part of the sabzevar zone. the vein host rocks consist of eocene intermediate to silicic volcanic rocks. the mineralization occurs as open space filling, taking place as veins, veinlets and hydrothermal breccias. based on field geology and textural evidence, three main stages of mineralization were identified. s...

the muteh gold deposit (ne of golpaygan) in the central part of intrusive-metamorphic belt of sanandaj-sirjan zone comprises nw-se trending gold-quartz vein occurred in metamorphic complex. gold mineralization is associated with quartz veins that formed during regional deformation across the mylonitic zones in metamorphic rocks of predominantly meta-volcanic, gneiss and schist. the sulfidation ...

Abstract Cu-Ni-Co-PGE mineralization occurs at Haidbachgraben in the Early Palaeozoic, Subpenninic Hollersbach Complex of Central Tauern Window, Austria. Massive sulfide ore formed from melt segregated silicate during intrusion pyroxenite into magmatic rocks an MORB-type environment. Relics minerals include chromian spinel and polyphase droplets composed pyrrhotite, chalcopyrite pentlandite pre...

abstract biological and chemical changes in rhizosphere following organic residues as well as manures application are important processes which influence nitrogen mineralization and nutrients bioavailibity in soils. this study was done to evaluation of organic residues effect on growth, nitrogen supply and rhizosphere characteristics of corn and sunflower plants in greenhouse experiment using s...

BACKGROUND The objectives of these laboratory experiments were: (1) to assess bromoxynil sorption, mineralization, bound residue formation and extractable residue persistence in a Dundee silt loam collected from 0-2 cm and 2-10 cm depths under continuous conventional tillage and no-tillage; (2) to assess the effects of autoclaving on bromoxynil mineralization and bound residue formation; (3) to...

Fluid-explosive rocks of the dike complex are identified in Middle Timan. The have convergent properties due to a combination explosive and metasomatic processes. study petrographic features revealed their nature. Further chemical composition rock-forming minerals established source mantle material paragenetic relationship with carbonatite magmatism. fluid-explosive dyke long-term multistage fo...