The world-class Macraes orogenic gold deposit (∼10Moz resource) formed during the late metamorphic uplift of a metasedimentary schist belt in southern New Zealand. Mineralising fluids, metals and metalloids were derived from within the metasedimentary host. Helium and argon extracted from fluid inclusions in sulphide mineral grains (three crush extractions from one sample) have crustal signatur...

the area is located 20 km northwest of kashmar and about 4 km of kalateh taimour in khorasan razavi province. the study area is part of tertiary volcanic-plutonic belt north of daruneh fault and its situation in tectonic inliers between two important active faults, doruneh and taknar. volcanic rocks are mainly intermediate to acid pyroclastic type. they formed during early tertiary. the volcani...

The Cuonadong Sn–W–Be polymetallic deposit in the Himalayan leucogranite belt is a representative hydrothermal deposit. role of fluid exsolution directly from magma and reaction with surrounding rocks for ore-forming element enrichment still controversial. Tourmaline significant B-bearing mineral deposit, its geochemical B isotopic signatures can record source evolution fluid. Two types tourmal...

The vein-type Chomalu polymetallic epithermal deposit, located in the Tarom-Hashtjin Metallogenic Province (THMP), western Alborz, formed two separate mineralized zones controlled by fault within andesite and olivine basalt host rocks. deposit occurs adjacent to Varmarziar quartz monzonite, monzodiorite, monzosyenite intrusions. Ore mineralization consists of three stages; (i) an early stage do...

The paper presents the results of detailed structural analysis and 40 Ar/ 39 Ar dating deformations in Golets Vysochaishii deposit area. geological studies showed folded-deformation sequence from large lying folds through axial-plane cleavage formation to quartz-filled fractures. syntectonic sericite yielded ages two Hercynian tectonic impulses – 340 320 Ma. This stage is characterized by earli...

The presented studies are aimed to determine the formation patterns of gold-rare metal mineralization within one most inaccessible Arctic islands Russian Federation, Bolshevik Island Severnaya Zemlya archipela-go. relevance work is determined by high probability discovering a significant in terms reserves deposit, which proved many researchers on example known large deposits be typical feature ...

Granite-related uranium ore is an important resource type in China and worldwide. Whether the geochemical theory “U6+ oxidative migration U4+ reductive precipitation” applicable to granite-related mineralization has not been determined. Detailed field petrographic work, as well scanning electron microscopy energy spectrum analysis, are conducted this study analyze relationship between minerals ...

The Solstad copper deposit, located in SE Sweden, is hosted by a quartz-rich rock sliver surrounded granite belonging to the 1.8 Ga Transscandinavian Igneous Belt. Ore petrographic studies have revealed number of previously unrecognized opaque phases, including several Co selenides and tellurides. Based on an situ U-Pb investigation zircons from mineralized sample, it suggested that detrital or...