• 责任者：Jia Fuju (Department of Earth Sciences ; Kunming University of Science and Technology ; Kunming 650093 ; China) ; Gao Jianguo
• 刊名：Acta Mineralogica Sinica
• 出版年：2013
• 卷期：33(4)
• 页码：p.658-664
• issnNo：ISSN1000-4734
• isbnNo：CN52-1045/P

Laojunshan tin poly-metallic metallogenic region, an important part of the tin poly-metaUic metallogenk belt in southeastern Yunnan province, is characterized by multi-mineralization types. Rear earth elements （REE） contents of ore-bearing rocks and associated ores were analyzed in this paper to reveal the origin of these mineralization types. The results show that all samples have low total REE contents （δREE=14.3× 10-6-261.7× 10-6） with LREE-enriched. Simple skarns have EREE contents ranging from 14.3× 10-6 to 71.49×10-6, with positive Eu anomaly （δEu=1.06-1.36） and negative Ce anomaly （δCe=0.84-0.93）. Ores host in simple skams have EREE contents ranging from 48.7× 106 to 62.94× 10-6, with 8Eu values range from 3.01 to 3.74 and δCe values range from 0.80 to 0.87. ZREE contents of complicated skarns range from 25.14×10-6 to 261.68× 10-6, with 6Eu and 8Ce values range from 0.54 to 2.68 and 0.824）.97, respectively. Ores host in this rocks have EREE contents ranging from 77.95×106to 243.18×106, with δEu range from 0.52 to 2.85 and δCe range from 0.89 to 0.96. Granites have a narrow range of total REE contents （EREE 69.42×106-152.77×106）, with obviously negative Eu anomaly （δEu=0.204）.36） and positive Ce anomaly （δCe=l.01-1.15） and its corresponding ores with ZREE=54.045×106-78.31×106, δEu=0.344）.76 and δCe=0.95-1.01. It is clearly that all ore-bearing rocks have similar REE contents and distribution patterns with its related rocks, which suggesting that REE in ore-forming fluids may be sourced from its host rocks. In addition, REE contents and associated parameters indicate that simple skarns and their related ores may be formed by marine volcanic exhalation-sedimentary and complicated skarns and their related ores may be influenced by both marine volcanic exhalation-sedimentary and Yanshanian granite magma. This implicates that multi-mineralization processes occur in Laojunshan tin poly-metallic metallogenic belt.