In the present study, we collected and investigated spinels from Man Sin deposit in Myanmar using standard gemological testing, microscopic observation, EDXRF, Raman spectrometry. The color observation was performed under various lighting conditions to show differences. A very high Cr/Fe ratio is linked with exceptionally strong red fluorescence. Microscopic spectroscopy identified mineral incl...

We report a new occurrence of preiswerkite, the rare sodium analog eastonite, trioctahedral mica, from marble-hosted noble spinel deposits Luc Yen district, northern Vietnam. It is found in marble for first time. The preiswerkite anhedral and associated with phlogopite, aspidolite, sadanagaite, pargasite, spinel, corundum, dolomite calcite. average compositions (Na0.88Ca0.08K0.01)Σ0.97(Mg2.29Al...

Abstract Magma mixing is a widespread magmagenic process. However, its significance in the formation of ultrapotassic magmas has been largely overlooked so far as they are commonly thought to originate directly from mantle and ascend rapidly through crust. The Hezhong lavas Western Yunnan (SW China) (basaltic) trachy-andesitic composition. These rocks display porphyritic textures with olivine, ...

The Dinaride Ophiolite Belt formed from the Jurassic part of Neotethys. investigated Ozren ophiolite complex in Bosnia and Herzegovina consists peridotites, plagioclase plagiogranites, troctolites other gabbroic rocks, fewer basalts. Lherzolites harzburgites contain corroded ortho- clinopyroxene1 porphyroclasts enclosed olivine matrix. boundaries between aggregates pyroxene1 spinel1 are infille...

The Ma&tan alnijite contains a rich and varied megacryst suite of unprecedented compositional range. We have undertaken trace element and isotope modeling in order to formulate a petrogenetic scheme which links the host alniiite to its entrained megacrysts. This requires that a proto-alntiite magma is the product of zone refining initiated by diapiric upwelling (where the initial melt passes th...