نتایج جستجو برای: anhydrite
تعداد نتایج: 404 فیلتر نتایج به سال:
Subducted slabs, which include altered-oceanic crust and overlying sediments, impart geochemical redox fingerprints to arc magmas affect long-term evolution of the deep mantle. Yet, oxygen fugacity subducting slab remains poorly constrained. Light Rare Earth Element (LREE) chalcophile element (ChE) ratios may serve as proxies for downgoing slabs because difference in compatibility these groups ...
Čukaru Peki is a recently discovered porphyry- high-sulfidation Cu-Au deposit located 5km south of the mining town Bor in east Serbia. Three styles mineralization are distinguished system: type with massive sulfides (named Upper zone), porphyry Lower zone) and transition (between porphyries sulfides). This study investigates concentration distribution trace elements pyrite from these three zone...
The Raja Au-Co mineralization in the Paleoproterozoic Peräpohja belt northern Finland is part of wider Rompas-Rajapalot mineralized area with several known occurrences. characterized by distinct tourmaline occurrences, spatially associated mineralization. Four texturally types were identified although all analysed tourmalines belong to alkali-group and are classified as dravite. δ 11B values fr...
Introduction: The ChemCam (chemistry/camera) instrument on the Mars Science Lander (MSL) images outcrop or regolith at high resolution and uses a laser source to generate high-temperature plasma from spots of ~100 μm diameter, at ranges up to ~7 m [1,2]. The lander will carry body-mounted calibration targets consisting of synthetic silicate glasses, a natural volcanic glass (macusanite), and fo...
Tridymite, a low-pressure, high-temperature (>870 °C) SiO2 polymorph, was detected in a drill sample of laminated mudstone (Buckskin) at Marias Pass in Gale crater, Mars, by the Chemistry and Mineralogy X-ray diffraction instrument onboard the Mars Science Laboratory rover Curiosity The tridymitic mudstone has ∼40 wt.% crystalline and ∼60 wt.% X-ray amorphous material and a bulk composition wit...
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