Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China
文献类型：期刊论文
| ; | |
| 作者 | Mei-Fu Zhou; Jun-Hong Zhao; Liang Qi; Wenchao Su; Ruizhong Hu |
| 刊名 | Contributions to Mineralogy & Petrology
 ; Contributions to Mineralogy & Petrology
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| 出版日期 | 2006 ; 2006 |
| 卷号 | 151期号:1页码:1-19 |
| 关键词 | Volcanic Rock Volcanic Rock inductively Couple Plasma Mass Spectrometry mantle Source mantle Plume mafic Rock inductively Couple Plasma Mass Spectrometry mantle Source mantle Plume mafic Rock |
| 英文摘要 | Mafic-layered intrusions and sills and spatially associated andesitic basalts are well preserved in the Funing area, SW China. The 258±302Ma-layered intrusions are composed of fine-grained gabbro, gabbro and diorite. The 260±302Ma sills consist of undifferentiated diabases. Both the layered intrusions and volcanic rocks belong to a low-Ti group, whereas the diabases belong to a high-Ti group. Rocks of the high-Ti group have FeO, TiO 2 and P 2 O 5 higher but MgO and Th/Nb ratios lower than those of the low-Ti group. They have initial 87 Sr/ 86 Sr ratios (0.706–0.707) lower and 07Nd (611.5 to 610.6) higher than the low-Ti equivalents (0.710–0.715 and 619.6 to 614.0, respectively). The high-Ti group was formed from relatively primitive, high-Ti magmas generated by low degrees (7.3 –9.5%) of partial melting of an enriched, OIB-type asthenospheric mantle source. The low-Ti group may have formed from melts derived from an EM2-like, lithospheric mantle source. The mafic rocks at Funing are part of the Emeishan large igneous province formed by a mantle plume at 6526002Ma. ;Mafic-layered intrusions and sills and spatially associated andesitic basalts are well preserved in the Funing area, SW China. The 258±302Ma-layered intrusions are composed of fine-grained gabbro, gabbro and diorite. The 260±302Ma sills consist of undifferentiated diabases. Both the layered intrusions and volcanic rocks belong to a low-Ti group, whereas the diabases belong to a high-Ti group. Rocks of the high-Ti group have FeO, TiO 2 and P 2 O 5 higher but MgO and Th/Nb ratios lower than those of the low-Ti group. They have initial 87 Sr/ 86 Sr ratios (0.706–0.707) lower and 07Nd (611.5 to 610.6) higher than the low-Ti equivalents (0.710–0.715 and 619.6 to 614.0, respectively). The high-Ti group was formed from relatively primitive, high-Ti magmas generated by low degrees (7.3 –9.5%) of partial melting of an enriched, OIB-type asthenospheric mantle source. The low-Ti group may have formed from melts derived from an EM2-like, lithospheric mantle source. The mafic rocks at Funing are part of the Emeishan large igneous province formed by a mantle plume at 6526002Ma. |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.gyig.ac.cn/handle/42920512-1/8121]  |
| 专题 | 地球化学研究所_矿床地球化学国家重点实验室 |
| 作者单位 | 1.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China 2.Department of Earth Sciences, University of Hong Kong, Hong Kong, Peoples Republic of China |
| 推荐引用方式 GB/T 7714 | Mei-Fu Zhou,Jun-Hong Zhao,Liang Qi,et al. Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China, Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China[J]. Contributions to Mineralogy & Petrology, Contributions to Mineralogy & Petrology,2006, 2006,151, 151(1):1-19, 1-19. |
| APA | Mei-Fu Zhou,Jun-Hong Zhao,Liang Qi,Wenchao Su,&Ruizhong Hu.(2006).Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China.Contributions to Mineralogy & Petrology,151(1),1-19. |
| MLA | Mei-Fu Zhou,et al."Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China".Contributions to Mineralogy & Petrology 151.1(2006):1-19. |
入库方式： OAI收割
来源：地球化学研究所
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