Liguo early cretaceous high-mg adakitic intrusive rocks in the xuzhou region: petrogenesis and implications for geodynamics and mineralization
文献类型：期刊论文
| 作者 | Zi Feng1,2; He GuangYu3; Dai ShengQian3; Xu Wei3 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 23期号:11页码:2857-2868 |
| 关键词 | High-mg adakitic rocks Delamination Metasomatized mantle Cu mineralization Liguo Northern china |
| ISSN号 | 1000-0569 |
| 通讯作者 | Zi feng() |
| 英文摘要 | The liguo cretaceous pluton,which is located in the southeastern margin of the north china craton and to the west of the tan-lu fault belt, consists of dioritic porphyrise and minor granodioritic porphyries, and is associated with cu-fe mineralization. the liguo intrusive rocks are geochemically similar to adakites, e. g., sio(2) > 56%, relatively high al(2)o(3)( 13. 69% - 15. 15%), sr(452 -618 mu g/g), sr/y(30 - 93) and la/yb(8 - 24) values, but low y(4. 84 - 15. 55 mu g/g) and yb(0.48 - 1.45 mu g/g) contents, and without obvious eu anomalies (delta eu = 0.87 - 0.98). in addition, the liguo intrusive rocks may be classified as high-mg, slightly high-mg and low-mg adakitic rocks according to mg(4/5) and feo(t)/mgo values. the high-mg rocks are similar to sanukites. the liguo adakitic rocks exhibit high ((87) sr/(86) sr)(i) (0.7055 - 0.7071) and low epsilon(nd) (t) ( - 11.46 - - 4. 64) values, which are different from those of subducted oceanic crust-derived adakites. we suggest that the slightly high-mg and low-mg adakitic rocks likely originated from delaminated lower crust-derived adakitic magmas contaminated at different percentage by mantle peridotites. however, the high-mg adakitic rocks were most probably derived by partial melting of mantle peridotites metasomatized by the adakitic magmas generated by partial melting of delaminated lower crust. the lithosphere thinning in eastern china and the activities of the tan-lu fault belt during mesozoic possibly played an important role in the petrogenesis of the liguo adakitic rocks. the intense interaction between mantle peridotite and the adakitic magmas derived from delaminated lower crust possibly caused the decomposition of sulfide in the mantle, and the cu mineralization ultimately. |
| WOS关键词 | NORTH CHINA CRATON ; LOWER CONTINENTAL-CRUST ; EASTERN CHINA ; VOLCANIC-ROCKS ; MANTLE WEDGE ; LITHOSPHERE BENEATH ; TRACE-ELEMENT ; SOUTH CHINA ; GEOCHEMISTRY ; AREA |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000254139500016 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380225 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zi Feng |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zi Feng,He GuangYu,Dai ShengQian,et al. Liguo early cretaceous high-mg adakitic intrusive rocks in the xuzhou region: petrogenesis and implications for geodynamics and mineralization[J]. Acta petrologica sinica,2007,23(11):2857-2868. |
| APA | Zi Feng,He GuangYu,Dai ShengQian,&Xu Wei.(2007).Liguo early cretaceous high-mg adakitic intrusive rocks in the xuzhou region: petrogenesis and implications for geodynamics and mineralization.Acta petrologica sinica,23(11),2857-2868. |
| MLA | Zi Feng,et al."Liguo early cretaceous high-mg adakitic intrusive rocks in the xuzhou region: petrogenesis and implications for geodynamics and mineralization".Acta petrologica sinica 23.11(2007):2857-2868. |
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来源：中国科学院大学
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