Scheelite of the Kekura Gold Deposit, Western Chukchi Peninsula: Trace Elements and Fluid Inclusions

Scheelite of the Kekura gold deposit in the Western Chukchi Peninsula is reported for the first time. Three generations of the mineral have been identified. According to the LA–ICPMS data, the Mo content in scheelite does not exceed 0.2 ppm and the total REE ranges from 20 to 150 ppm. The REE distribution patterns of all three scheelite generations have a strong positive Eu anomaly (Eu/Eu* = 4.4–55.6), which is typical of scheelite from intrusion-related and orogenic gold deposits. The high Sr concentration (1300–12 000 ppm) is characteristic of the hypabyssal intrusion-related Au deposits. According to the fluid inclusion data, the minimal crystallization temperature of scheelite and associated quartz is 200–250°С.