Robat-e Zengejeh rocks affected by a variety of events began from Precambrian. This research studied preserved effects of the events. Regional metamorphism is the oldest event in this rocks include schist, amphibolite and orthogneiss, that reached up to amphibolite facies. After this regional metamorphism, it seems that mesocratic (624±5Ma) and hololeucocratic granitoides intruded respectively....

The basement of eastern Mexico comprises Grenvillian-age granulite-facies metamorphic rocks. Oaxacan Complex represents the largest outcrop belt this in Mexico. In work, southwestern garnets are studied from a petrographical, geochemical, and geothermobarometrical perspective for first time. display different grain sizes nucleated polyphase evolution. almandine end member proportion is similar ...

Using in-situ LA-ICP-MS, the trace-element composition of hydrothermal quartz from five Sb mineralized Variscan districts, different parts France, were compared. Each these districts is characterized by presence stibnite, with being a ubiquitous gangue mineral. The resulting dataset was processed using set multivariate statistical analyses (i.e. principal component analysis, hierarchical cluste...

The Shuangwang gold deposit, with more than 70 tons of Au, is located in the Fengxian-Taibai ore concentration area Qinling Orogen central China, hosted a Northwest-trending breccia belt. Fragments body are cemented by ankerite, albite, quartz, calcite, and pyrite. Four metallogenic stages identified mineral paragenesis: quartz-albite, ankerite-pyrite-albite, pyrite-quartz-calcite, fluorite-anh...

The crystal structure of gem-quality pargasite from Soper River, near Kimmirut, Baffin Island, Nunavut, Canada, (K0.24Na0.73) 0.97 (Ca1.86Na0.14) 2.00 (Mg4.15Fe0.07Mn0.01Al0.71Ti0.06) 5.00 (Si6.45Al1.55) O22 [(OH)1.25F0.63O0.12] 2.00, a 9.8814(6), b 17.967(1), c 5.2927(4) Å, 105.263(5)°, V 906.5 Å3, C2/m, Z = 2, has been refined to an R index of 2.9% using 1506 observed intensities measured wit...

During the last stages of the eruption of syn-rift basalts along the East Greenland Margin, debris flows and/or pyroclastic deposits were emplaced at Ocean Drilling Program Sites 915 and 916. The deposits and the tops of the lava flows at Site 918 were altered by subaerial weathering processes as indicated by downhole changes in mineral and chemical composition, and by the mineral paragenesis. ...

In this study two small, but genetically related iron carbonate deposits Mačje Jame and Vranjski Potok, south west of Busovača (MBSM), located in the pre-Devonian metamorphic complex were investigated in detail. Analyses of the main chemical components, trace elements, REE, isotope composition of C, O, S, 87Sr/86Sr ratio of rhyolite, plot of REE normalized to CI chondrites and a microscopic stu...

This study combines multiscale analyses of geological, fault, fracture, and stable isotope data to investigate strike-slip deformation channeling hydrothermal fluids along the Cafarnaum fault calcite veins at different distances from which is a structure in São Francisco Craton, northeastern Brazil. Meteoric with δD values near −45‰ δ18O −6.5‰ temperatures 40–70 °C precipitated as host carbonat...