Geochemistry of late mesozoic-cenozoic basalts in yitong-datun area, jilin province and its implication
文献类型：期刊论文
| 作者 | Zhang HuiHuang; Xu YiGang; Ge WenChun; Ma JinLong |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2006-06-01 |
| 卷号 | 22期号:6页码:1579-1596 |
| 关键词 | Geochemistry Melt-lithosphere interaction Mantle dynamic melting model Melting depth Lithospheric evolution Yitong-datun Jilin |
| ISSN号 | 1000-0569 |
| 通讯作者 | Zhang huihuang(zhanghuihuang@gig.ac.cn) |
| 英文摘要 | Yitong-datun region,where volcanic activity persisted for over 80ma, provides important constraints on the evolution of deep lithosphere beneath this part of northeast china. from late cretaceous (92.5ma) datun basalt in changchun to tertiary(31 ma, 9 similar to 15ma) basalts in yitong-shulan graben, alkaline contents and dy/yb ratios increase with temporal decrease, and the final melting depths of basalts, estimated according to the mantle dynamic melting model, increase from about 50km to 110km. based on the lithospheric lid effect, the thickness of the lithosphere beneath yitong-datun is inferred to have increased since the late cretaceous. the yitong tertiary alkali basalts show a homogeneous composition with trace element spidergram, nb/u ratio, low ( (87) sr/(86) sr) (i) and positive epsilon(nd) (t) similar to oceanic island basalts (oib). all these indicate that tertiary basalts were derived from an asthenospheric source. in contrast, the datun tholeiitic basalts have relatively higher ni, cr, sc, ba/th, rb/nb, ba/nb, ((87)sr/(86)sr)i and lower ((143)nd/(144)nd) i i compared to tertiary alkali basalts. this difference is attributed to the reaction between asthenospheric melts and old enriched-lithospheric mantle. the geochemical characteristics of the yitong-datun basalts highlight the different roles of the lithosphere in intraplate magmatism. for the tertiary basalts, the lithosphere acted as a mechanical barrier to upwelling mantle, but has not been involved materially in the magma generation. for the late cretaceous basalts, the lithosphere played both indirect and direct roles in magmatic genesis. |
| WOS关键词 | SINO-KOREAN CRATON ; LITHOSPHERE-ASTHENOSPHERE INTERACTION ; NORTH CHINA CRATON ; VOLCANIC-ROCKS ; EASTERN CHINA ; TRACE-ELEMENT ; UPPER-MANTLE ; MAJOR-ELEMENT ; CHEMICAL CLASSIFICATION ; ISOTOPIC CONSTRAINTS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000239220800015 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379723 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang HuiHuang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China 3.Jilin Univ, Dept Earth & Planetary Sci, Changchun 130061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang HuiHuang,Xu YiGang,Ge WenChun,et al. Geochemistry of late mesozoic-cenozoic basalts in yitong-datun area, jilin province and its implication[J]. Acta petrologica sinica,2006,22(6):1579-1596. |
| APA | Zhang HuiHuang,Xu YiGang,Ge WenChun,&Ma JinLong.(2006).Geochemistry of late mesozoic-cenozoic basalts in yitong-datun area, jilin province and its implication.Acta petrologica sinica,22(6),1579-1596. |
| MLA | Zhang HuiHuang,et al."Geochemistry of late mesozoic-cenozoic basalts in yitong-datun area, jilin province and its implication".Acta petrologica sinica 22.6(2006):1579-1596. |
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来源：中国科学院大学
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