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http://www.igeodata.org/handle/20.500.11758/286
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DC 字段 | 值 | 语种 |
---|---|---|
所有者 | Ying Tong | - |
所有者 | Bor-ming Jahn | - |
所有者 | Tao Wang | - |
所有者 | Da-wei Hong | - |
所有者 | Eugene I. Smith | - |
所有者 | Min Sun | - |
所有者 | Jian-feng Gao | - |
所有者 | Qi-di Yang | - |
所有者 | Wei Huang | - |
获取日期 | 2017-03-06T08:38:08Z | - |
获取日期 | 2017-03-06T08:38:08Z | - |
首次发表日期 | 2014-08 | - |
引用地址 | http://www.igeodata.org/handle/20.500.11758/286 | - |
摘要 | The Central Asian Orogenic Belt (CAOB) is known to be the Earth’s largest Phanerozoic accretionary oro- genic belt. Its southern margin, particularly in the southern Mongolia and Inner Mongolia (SMIM), shows an extensive distribution of alkaline granites. Study of these granites could shed light on long-debated hypotheses on the late Paleozoic tectonic evolution of this region. In this work, we performed a detailed zircon age determination and whole rock geochemical analysis on alkaline granites from four granitic plutons in northern Inner Mongolia (Hongol, Saiyinwusu, Baolag, and Baiyinwula). U–Pb zircon dating yielded early Permian ages (ca. 280 Ma) for the four plutons. Whole-rock geochemical analyses show chemical characteristics typical of alkaline granites. Coeval alkaline granites from southern Mongolia to northern Inner Mongolia constitute a gigantic (?900 km) Permian (292–275 Ma) alkaline granite belt in the southern CAOB. Furthermore, these alkaline granites have whole-rock e Nd (t) varying between +3.6 and +6.4 and zircon e Hf (t) from +4.9 to +20.3. The geochemical and Nd–Hf isotopic signatures suggest der- ivation by partial melting of a protolith assemblage dominated by metasomatised mantle, and followed by fractional crystallization in a post-collisional extensional environment. | zh_CN |
语种 | en | zh_CN |
出版者 | Institute of Geology Chinese Academy of Geological Sciences | zh_CN |
主题关键词 | Zircon U–Pb dating Solonker suture Alkaline granite Post-collisional Sr–Nd–Hf isotope Late Paleozoic Central Asian Orogenic Belt (CAOB) | zh_CN |
成果名称 | Permian alkaline granites in the Erenhot–Hegenshan belt, northern Inner Mongolia, China: Model of generation, time of emplacement and regional tectonic significance | zh_CN |
类型 | Book | zh_CN |
所属集合: | 科技成果 |
文件中的条目:
条目 | 描述 | 大小 | 格式 | |
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Permian alkaline granites in the Erenhot–Hegenshan belt, northern Inne.pdf | 4.32 MB | Adobe PDF |
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