Cretaceous volcanic rocks of zenong group in north-middle lhasa block: products of southward subducting of the slainajap ocean?
文献类型：期刊论文
| 作者 | Kang ZhiQiang1,2; Xu JiFeng1; Dong YanHui1,2; Wang BaoDi1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 24期号:2页码:303-314 |
| 关键词 | Lhasa block Zenong group La-icpms dating Subduction Arc volcanic rocks |
| ISSN号 | 1000-0569 |
| 通讯作者 | Kang zhiqiang() |
| 英文摘要 | Studying mesozoic volcanic rocks widely exposed in the lhasa block can better understand the geological evolution of the tethys and construction of the whole tibet plateau. in present study, major, trace element compositions and zircon u-pb dating results of the zenong volcanic rocks in north- middle lhasa block have been reported. the volcanic rocks from the zenong group mainly contain basalt-andesite, andesite and dacite. based on the geochemical composition, these volcanic rocks are divided into two subgroups: the intermediate-basic group (sio2 <58%) and the intermediate-acid group (sio2 >-58%). from the sio2- k2o diagram it. can he known that the former group is mainly composed of low-k and medium-k calc-alkaline series, while the latter is high-k calcalkaline series; the two groups show a similar trace element characteristic, e. g., the enrichment of lile ( rb, ba, th, u) and depletion of hfse: (nb, ta, ti), similar to those of an island arc volcanic. rock. the similar spiderdiagram and ree models hint that rocks of the two groups were probably derived from a same magmatic source. zircons from the zenong volcanic: rocks were dated by la-icpms, obtaining an age of 113.6 +/- 1.0ma. thus, we suggest that the zenong volcanic rocks were resulted from the. southward subduction of the shiquanhe-yongzhu-namucuo-jiali ocean (slainajap ocean on the south side of bangonghu-nujiang suture) in early cretaceous. |
| WOS关键词 | PLASMA-MASS SPECTROMETRY ; INDO-ASIAN COLLISION ; U-PB AGE ; NEW-ZEALAND ; TECTONIC EVOLUTION ; CENOZOIC VOLCANISM ; ELEMENT TRANSPORT ; SOUTHERN TIBET ; IGNEOUS ROCKS ; ARC MAGMAS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000259117600010 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2386764 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Kang ZhiQiang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kang ZhiQiang,Xu JiFeng,Dong YanHui,et al. Cretaceous volcanic rocks of zenong group in north-middle lhasa block: products of southward subducting of the slainajap ocean?[J]. Acta petrologica sinica,2008,24(2):303-314. |
| APA | Kang ZhiQiang,Xu JiFeng,Dong YanHui,&Wang BaoDi.(2008).Cretaceous volcanic rocks of zenong group in north-middle lhasa block: products of southward subducting of the slainajap ocean?.Acta petrologica sinica,24(2),303-314. |
| MLA | Kang ZhiQiang,et al."Cretaceous volcanic rocks of zenong group in north-middle lhasa block: products of southward subducting of the slainajap ocean?".Acta petrologica sinica 24.2(2008):303-314. |
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来源：中国科学院大学
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