Analysis of rare-earth elements in fluid inclusions by inductively coupled plasma-mass spectrometry (ICP-MS)  

作　　者：Wenchao Su Liang Qi Ruizhong Hu Guoping Zhang 

机构地区：[1]Chinese Acad Sci, Inst Geochem, Open Lab Ore Deposit, Guiyang 550002, Peoples R China

出　　处：《Chinese Science Bulletin》1998年第22期1922-1927,共6页

基　　金：theNaturalScienceFoundationofGuizhouProvince

摘　　要：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.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.

关 键 词：FLUID INCLUSIONS RARE_EARTH ELEMENTS ICP_MS. 

分 类 号：P592[天文地球—地球化学]