Advances in trace element ‘fingerprinting’ of gem corundum, ruby and sapphire, Mogok area, Myanmar.

摘要: Mogok gem corundum samples from twelve localities were analyzed for trace element signatures (LA-ICP-MS method) and oxygen isotope values (δ 18 O, by laser fluorination). The study augmented earlier findings on suites that suggested the tract forms a high vanadium area also identified rare alluvial ruby sapphire grains characterised unusually silicon, calcium gallium, presence of noticeable boron, tin niobium very low iron, titanium magnesium contents. Oxygen O) Si-Ca-Ga (20‰-25‰) (10‰-20‰) indicate typical crustal values, with >20‰ being carbonate genesis. has chromium (up to 3.2 wt % Cr) gallium 0. 08 Ga) compared most ( 6), other features suggest potential skarn-like, carbonate-related genesis degree magmatic fluid input overall results widen range different within complex