• 责任者：Lan Tingguang (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Fan Hongrui
• 刊名：Geochimica
• 出版年：2011
• 卷期：40(5)
• 关键词：稀土矿床 ; rare earth deposit ; 铷—锶计时 ; Rb-Sr dating ; 钕同位素 ; neodymium isotopes ; 流体包裹体 ; fluid inclusions ; 山东 ; Shandong Province
• 页码：p.428-442
• 图表：11 illus., 2 tables, 52 refs.
• 分类号：1001
• 出版序号：1766
• issnNo：ISSN0379-1726
• isbnNo：CN44-1398/P

Weishan REE deposit, a pegmatite-type REE deposit related to alkaline rocks, is located in Luxi Block, southeastern North China Craton. Muscovite Rb-Sr isochron yields an age of 119.5 Ma, which belonged to the Early Cretaceous large-scale mineralization in the North China Craton. LA-ICPMS Nd isotopic compositions of bastnaesite and monazite indicate that the source of the REE deposit is the enriched lithospheric mantle. Four types of fluid inclusions have been identified in quartz, fluorite and barite, including 1) H₂O inclusions(H); 2) pure CO₂ inclusions(C); 3) H₂O+CO₂ inclusions(HC); and 4) H₂O+CO₂+daughter mineral inclusions (HCD). The H inclusions are secondary while others are primary. The coexistence of C, HC and HCD inclusions and the wide range of liquid/vapor ratios between these inclusions suggest that fluid unmixing may have occurred during ore-forming process.REE were most probably transported as [REEF]²⁺ and precipitated through fluid unmixing.