REE Geochemistry of Mengya’a Lead-Zinc Deposit in Tibet
详细信息
- 责任者：Zhang Zunzun (Research Center of Granitic Diagenesis and Mineralization ; China Geological Survey ; Wuhan 430205 ; China) ; Li Zeqin
- 刊名：Journal of Guilin University of Technology
- 出版年：2013
- 卷期：33(2)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 稀土元素 ; rare earths ; 西藏 ; Tibet
- 页码：p.230-238
- 图表：illus., 2 tables, 17 refs.
- 分类号：1001
- issnNo：ISSN1674-9057
- isbnNo：CN45-1375/N
摘要
Mengya’a lead-zinc deposit in Tibet,located in Nyainqentanglha metallogenic(retro-arc depressions and uplifts) sub belt of south Gangdise-Nyainqentanglha metallogenic belt is a significant and typical skarn ore deposit.Based on ore deposit geology,and study REE(rare earth elements) geochemistry,researches manifest that the metal sulphides of ores are low ΣREE(average is 31.03 × 10-6),and the LREE-enriched type;the LREE / HREE is 8.07-16.14;the δCe is 0.94-1.19(average is 1.06);the δEu is 0.45-0.76(average is 0.56).The REE distribution patterns of the metal sulphides from ores are quite similar to that from Laigu Formation,rich in LREE and depleted in HREE.The curve is obvious right-dipping type.Eu negative anomalies and Ce flat type manifest that this deposit has certain genetic relationship with Laigu Formation in the source of ore-forming materials.Laigu Formation may provide ore-forming information for Mengya’a deposit.