Magmatic Evolution and Source Characteristics of the Ore-Bearing Intrusive Body in the Niumaoquan Magnetite Deposit, Xinjiang

详细信息   

• 责任者：Wang Shuo (College of Earth Science ; Jilin University ; Changchun 130061 ; China) ; Qian Zhuangzhi
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2012
• 卷期：31(4)
• 关键词：磁铁矿 ; magnetite ; 岩浆源 ; magma source ; 铁矿 ; iron ores ; 新疆 ; Xinjiang
• 页码：p.497-512
• 图表：7 illus., 4 tables, 58 refs.
• 分类号：1001
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

摘要

///Niumaoquan complex located in the east of late Paleozoic Harlik arc in Junggar plate contains magnetite. Geochemical characteristics（m/f values of most rocks range from 0.65 to 1.44） indicate that Niumaoquan complex belongs to tholeiite series characterized by ferruginous basic-ultrabasic rocks. The concentrations of rare earth elements are relatively low, and the primitive mantle normalized REE patterns show rightly-oblique curve with slight enrichment of LREE. he rocks are enriched in large ion lithophile elements（Rb, Ba, Sr, U） and depletion of Nb, Ta and high field strength elements（Zr, Hf） with weak enrichment of Ti. Delamination of lithospheric mantle resulted from partial melting caused by heating action of the asthenospheric material. At the same time, the material of enriched lithospheric mantle moved upward through the space formed by delamination of the lithosphere.