Geochemical Characteristics and Genesis of the Zhubu Mafic-Ultramafic Intrusion, Yunnan Province

详细信息   

• 责任者：Ma Yansheng (Institute of Geochemical Exploration and Marine Geological Survey ; ECE ; Nanjing 210007 ; China) ; Tao Yan
• 刊名：Geochimica
• 出版年：2012
• 卷期：41(4)
• 关键词：硫化物矿床 ; sulfide deposit ; 镁铁质岩 ; mafic rocks ; 超镁铁质岩 ; ultramafics ; 云南 ; Yunnan Province
• 页码：p.359-370
• 图表：illus., 3 tables, 42 refs.
• 分类号：1001
• issnNo：ISSN0379-1726
• isbnNo：CN44-1398/P

摘要

The mineralized complex which host Zhubu medium-sized Cu-Ni-PGE deposit is a mafic-ultramafic intrusion, intruded the schists and granitic-gneisses of Yuanmou Group. This paper provided new test results on major elements, trace elements, platinum-group elements （PGE） and Sr-Nd isotopes for some rocks and ores in the intrusion. The major and REE elements of the rocks show a tholeiitic evolution trend. The samples enrich in LREE and indicate a marked and weak negative anomalies for Sr and Nb, respectively. The inversion of magma evolution show that the primary magma is a picritic melt. The mineral cumulus and magma evolution also exit in the chamber, formed peridotite at the bottom and gabbros on the top, respectively, with pyroxenite and olivine- pyroxenite in between.