To study the characteristics and genetic constraints on alkalic-type epithermal Au mineralisation, here we use example of Tuvatu Au-Ag deposit in Fiji, with an emphasis detailed, quantitative mineralogy. mineralisation is hosted a weakly altered potassic monzonite parallel sided-veins K-feldspar, biotite, sericite, calcite, quartz, epidote-bearing propylitic or sericite-rich selvages. Petrograp...

Differential stress magnitude is a fundamental parameter in the study of geodynamic processes continental lithosphere, and typically estimated quartz- olivine-dominated lithologies using recrystallized grain size piezometers. Here we evaluate piezometric relationships natural mylonites with mineral pairs quartz–feldspar olivine–orthopyroxene, which commonly coexist deformed crustal mantle rocks...

introduction the mn mineralization occurs in the northeastern segment of the sabzevar zone (sz), north of the central iranian microcontinent (cim). this zone (sz) is located between the cim fragmentation in the south and the kopeh dagh sedimentary sequence in the north. the ore deposits of the northeastern segment of the sabzevar zone can be divided into three groups, each with different metal ...

Kinetic models have been used extensively for modeling and numerical simulation of luminescence phenomena dating techniques various dosimetric materials. Several comprehensive implemented quartz, which allow complex sequences irradiation thermal/optical events in nature the laboratory. In this paper, we present a simple accurate way simulating similarly feldspars. We introduce open-access R scr...

Introduction: Although feldspar is the most commonly-occurring mineral in the Earth=s crust, its use as a petrogenetic indicator has not been greatly exploited until recently, as evolving analytical techniques have refined characterizations of the amount, valence state, and site occupancy of Fe in the feldspar structure. Understanding of Fe valence and site occupancy in feldspar is of particula...

Wolfram mineralization in the area of Vau village (Dong Giang district, Quang Nam province) is distributed along small stream together with other sulfide mineralizations form to large boulders. Ore minerals are mainly sheelite, pyrhotite, arsenopyrite a little chalcopyrite and pyrite. The ore stockwork type gray, light gray metamorphic sedimentary rocks quartz - mica composition alternated feld...