SHRIMP U-Pb geochronology, geochemistry and Sr-Nd isotopes of the uranium- (molybdenum) related rhyolite and granitic porphyry, Datan, northern Heibei
文献类型：期刊论文
| 作者 | Zhang YaFei1,2; Wu JianHua1,2; Jiang Shan3; Liu Xuan4; Wu RenGui2; Liu Shuai1; Guo GuoLin1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2016 |
| 卷号 | 32期号:1页码:193-211 |
| 关键词 | Rhyolite Granitic porphyry Zhangjiakou Formation A-type granite SHRIMP U-Pb geochronology Uranium metallogenesis North China Craton destruction |
| 文献子类 | Article |
| 英文摘要 | Datan volcanic basin, located at the northern margin of the North China Craton, is an integral part of the Yan-Liao polymetallic (Mo-U-Ag-Pb-Zn) and Guyuan-Hongshanzi uranium belts. U-Pb dating on zircon by SHRIMP in this study suggests that rhyolite of the Zhangjiakou Formation and intruding granitic porphyry were emplaced at 140.2 +/- 1.9Ma (2 sigma, MSWD =1.7) and 131.7 +/- 1.1Ma (2 sigma, MSWD = 0.8), respectively. Whole rock major and trace elements analyses indicate that they both exhibit typical geochemical features of A-type granite, i.e. rich in Si, Fe, Ga, Rb, Pb, Th, U, Zr, Hf, Nb, Ta and LREE, and depleted in Al, Mg, Ti, Ba, Sr, Eu, Cr, Ni and HREE. Bulk rock Nd isotopic analyses reveal that they have similar epsilon(Nd(t)) (-15.9 and -16.5) and t(DM2) values (2267Ma and 2220Ma), indicating a common magma source. Elemental bivariate diagrams show evident trends of crystal fractionation of K-feldspar and biotite, leading to relative enrichment of Si, U and HREE, and relative depletion of Fe, Mg, Ti, Al, Sr, Ba, Eu, Zr and LREE. Combining previous studies, we propose that the rhyolite and granitic porphyry were derived from partial melting of Paleoproterozoic (ca 2.2 similar to 2.3 Ga) middle to lower crustal rocks of tonalitic to granodioritic compositions under an infra-plate extensional setting induced by lithospheric thinning and destruction of the North China Craton. The newly-obtained Rb-Sr isochron and previously published U-Pb ages suggest the U (Mo) metallogenesis may have occurred at 105 similar to 110Ma, which postdates the formation timing of both rhyolite and granitic porphyry. Comparative interpretation between Datan and other U-producing basins such as Guyuan suggests that the rhyolite and granitic porphyry in particular were favorable source rocks for U mineralization, which is further supported by their abnormally high uranium contents, and thus it is inferred that Datan basin should be consider as a potential exploration target. |
| WOS关键词 | A-TYPE GRANITES ; CHINA CRATON ; EASTERN CHINA ; NE CHINA ; HYDROTHERMAL ALTERATION ; ELEMENT MOBILITY ; CARBONATE METASOMATISM ; PARTITION-COEFFICIENTS ; IGNEOUS COMPLEX ; VOLCANIC-ROCKS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000370217700021 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62063]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.E China Inst Technol, State Key Lab Breeding Base Nucl Resources & Envi, Nanchang 330013, Peoples R China 2.E China Inst Technol, Collage Earth Sci, Nanchang 330013, Peoples R China 3.CNNC, 243 Geol Party, Chifeng 024006, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang YaFei,Wu JianHua,Jiang Shan,et al. SHRIMP U-Pb geochronology, geochemistry and Sr-Nd isotopes of the uranium- (molybdenum) related rhyolite and granitic porphyry, Datan, northern Heibei[J]. ACTA PETROLOGICA SINICA,2016,32(1):193-211. |
| APA | Zhang YaFei.,Wu JianHua.,Jiang Shan.,Liu Xuan.,Wu RenGui.,...&Guo GuoLin.(2016).SHRIMP U-Pb geochronology, geochemistry and Sr-Nd isotopes of the uranium- (molybdenum) related rhyolite and granitic porphyry, Datan, northern Heibei.ACTA PETROLOGICA SINICA,32(1),193-211. |
| MLA | Zhang YaFei,et al."SHRIMP U-Pb geochronology, geochemistry and Sr-Nd isotopes of the uranium- (molybdenum) related rhyolite and granitic porphyry, Datan, northern Heibei".ACTA PETROLOGICA SINICA 32.1(2016):193-211. |
入库方式： OAI收割
来源：地质与地球物理研究所
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