Geochemistry of Fluorite and Its Genesis in Sickl Area, Tarim Basin

Key words: 
• Tarim

Abstract: Geochemistry of fluorite deposits and its ore rocks in Sickl area, Tarim Basin is applied to investigate the ingenesis. The study shows that: relative LREE concentration and positive Eu anomaly are resulted from REE distribution pattern diagrams of fluorite; Eu, Sr and Ba are related closely in trace element analysis; the isotope ratio of Sr in fluorite is close to that in surrounding rocks. Conclusions are: oreforming fluids of the fluorite mainly are from the infiltration of heated basin brine ; trace elements(including REE) are from underlying strata and surrounding rocks; and elementsF, Ba, Eu are from Lower Cambrian siliceous rocks and phosphorite.