Mineralogy and Geochemistry of Nephrite from Wolay Deposited, Kunar, East Afghanistan

This research deals with the study of geochemical, petrographic and mineralogical properties Wolay Nephrite Occurrences in Kunar Province. is a relatively silicate mineral, Cyclosilicate, chemical composition Ca2(Mg,Fe)5Si8O22(OH)2 has monocline crystal shape. It found metamorphic rocks many parts world. nephrite area related to tectonic zone Jalalabad. Jalalabad located eastern part Afghanistan south-east Nuristan zone. Correspondingly, this upper Cambrian or younger Cambrian. In area, age Archean- Middle Proterozoic AR-PR2. contribution presents first systematic geochemical studies on deposit. Electron probe microanalysis, X-ray fluorescence (XRF) spectrometry, inductively coupled plasma mass spectrometry (ICP-MS), isotope ratio was used measure mineralogy, bulk-rock chemistry, stable (O H) isotopes characteristics samples from Kunar. Field investigation shows that ore body occurs dolomitic marble near intruding granitoids. Petrographic indicate mainly composed fine-grained actinolite Schist dolomite. Geochemical show all have low Fe/(FeO + MgO) values (4.72–21.34%), as well SiO2 (72.75%), Al2O3 (2.01), CaO (14.58%) NiO (0.05%) contents. The data analysis interpretation F=Mg/Mg+Fe percentages Nephrites type actinolite. deposit mineral been formed hydrothermally veins lens shape contact serpentinite carbonate (dolomite marble) rock under area. color its clarity direct effect economy price. Khas Konur district green due existence iron elements.