Platinum-group element geochemistry of Cenozoic basalts from the North China Craton: Implications for mantle heterogeneity
文献类型：期刊论文
| 作者 | Zhang WenHui1; Zhang HongFu2; Sun YaLi3; Fan WeiMing2; Han BaoFu4; Tang YanJie2 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2015-06-01 |
| 卷号 | 58期号:6页码:881-895 |
| 关键词 | continental basalts platinum group elements geochemistry North China Craton |
| DOI | 10.1007/s11430-014-5047-5 |
| 文献子类 | Article |
| 英文摘要 | Forty-two Cenozoic (mostly Miocene) basalt samples from Jining, Chifeng, Fansi, Xiyang, and Zuoquan areas of the North China Craton (the NCC basalts hereafter) were analyzed for platinum-group elements (PGE, including Os, Ir, Ru, Rh, Pt, and Pd). Most of them are alkaline basalts and tholeiites and all of them display little crustal contamination. The total PGE contents of the NCC basalts vary from 0.1 to 0.9 ppb, much lower than those of the primitive mantle values of 23.5 ppb. Primitive mantle-normalized PGE patterns of these basalts define positive slopes and Pd/Ir ratios vary from 1.2 to 25. In terms of both PGE contents and Pd/Ir ratios, they are quite similar to the mid-ocean ridge basalts. There are no obvious negative correlations between PGE vs. MgO, Ni, and Cu in the NCC basalts, indicating that fractional crystallization of olivine, pyroxene, and/or sulfides during magmatic process cannot be the controlling factor for the observed PGE variation. The observed Pd/Ir variations of the NCC basalts require involvement of non-chondritic heterogeneous mantle sources. Based on Sr-Nd-Pb-Hf isotopic systematics and incompatible-element signatures, a mixing of partial melts from both asthenospheric peridotites and enclosed mantle eclogites at the top of asthenosphere was proposed for the origin of these NCC basalts. The lenses of eclogites are derived from upwelling of recycled continental crust during the westward subduction of the Pacific plate from the 600 km discontinuity zone. The PGE geochemistry of these basalts provides independent evidence to support this conclusion and the observed Pd/Ir variations may reflect variations in proportions of tapped peridotitic and eclogitic melts. |
| WOS关键词 | SULFIDE FIRE ASSAY ; PLASMA-MASS SPECTROMETRY ; SINO-KOREAN CRATON ; LITHOSPHERIC MANTLE ; FLOOD BASALTS ; SILICATE MELT ; NOBLE-METALS ; SIDEROPHILE ELEMENTS ; CHALCOPHILE ELEMENTS ; SOUTHWESTERN CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000354901900004 |
| 资助机构 | National Natural Science Foundation of China(41173036 ; National Natural Science Foundation of China(41173036 ; Chinese Academy of Sciences(KZCX2-YW-103) ; Chinese Academy of Sciences(KZCX2-YW-103) ; 40534022) ; 40534022) ; National Natural Science Foundation of China(41173036 ; National Natural Science Foundation of China(41173036 ; Chinese Academy of Sciences(KZCX2-YW-103) ; Chinese Academy of Sciences(KZCX2-YW-103) ; 40534022) ; 40534022) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62500]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.Peking Univ, Dept Earth Sci, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang WenHui,Zhang HongFu,Sun YaLi,et al. Platinum-group element geochemistry of Cenozoic basalts from the North China Craton: Implications for mantle heterogeneity[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(6):881-895. |
| APA | Zhang WenHui,Zhang HongFu,Sun YaLi,Fan WeiMing,Han BaoFu,&Tang YanJie.(2015).Platinum-group element geochemistry of Cenozoic basalts from the North China Craton: Implications for mantle heterogeneity.SCIENCE CHINA-EARTH SCIENCES,58(6),881-895. |
| MLA | Zhang WenHui,et al."Platinum-group element geochemistry of Cenozoic basalts from the North China Craton: Implications for mantle heterogeneity".SCIENCE CHINA-EARTH SCIENCES 58.6(2015):881-895. |
入库方式： OAI收割
来源：地质与地球物理研究所
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