Abstract
Inductively coupled plasma-mass spectrometry (ICP-MS) is used to determine rare-earth elements abundances in fluid inclusions. Quartz separates from the Lannigou and Yata Carlin-type gold deposits, southwestern China, were prepared by the decrepitation-leach method. Leachates were analyzed by ICP-MS, using conventional sample introduction. The results demonstrate that the decrepitation-leach method, in combination with ICP-MS analysis of leachates, is effective for REE determination. The chondrite-normalized REE patterns of inclusion fluids for the Lannigou and Yata samples associated with gold mineralization are characterized by light rare-earth elements (LREE) enrichment, with a weak negative Ce anomaly and a positive or negative Eu anomaly, whereas the pattern for the Lannigou sample associated with late gold mineralization (quartz-calcite stage) is characterized by LREE enrichment relative to HREE, with negative Ce and Eu anomalies.
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