Geochemical comparison of paleogene high-mg potassic volcanic rocks in sanjiang area and interior tibetan plateau: compositional difference of the mantle sources.
文献类型：期刊论文
| 作者 | Chen JianLin1; Xu JiFeng1; Wang BaoDi1,2; Kang ZhiQiang1,2 |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2010-06-01 |
| 卷号 | 26期号:6页码:1856-1870 |
| 关键词 | Paleogene High-mg potassic volcanic rocks Geochemistry Sanjiang area Interior tibetan plateau |
| ISSN号 | 1000-0569 |
| 通讯作者 | Chen jianlin(lzdxchen@gig.ac.cn) |
| 英文摘要 | Paleogene high-mg potassic volcanic rocks(mgo > 6%, k2o/na2o > 1) are widely exposed in the tibetan plateau, which are generally believed to be sourced from mantle. these volcanic rocks show some common characteristics such as enriched-k, lile and depleted-hfse and contemporary eruption, but the rocks from interior of the tibetan plateau have geochemical compositions clearly different from that in sanjiang area. the high-mg potassic volcanic rocks from interior of tibetan plateau have lower epsilon(nd)(t) relatively to the volcanic rocks from sanjiang area, which suggested the former was sourced from a relatively depleted enriched-mantle source. the high-mg potassic volcanic rocks were probably derived from a k-rich enriched mantle which was related to metasomatism during earlier subduction events. however, difference of the high-mg potassic rocks between the both areas possibly results from different enriched process, the mineral compositions in their mantle sources and the depth of magmatic sources. the break-off of the north-dipping neo-tethyan slab in southern tibet during 50 similar to 40ma and delaminated lower continental of northern tibet in eocene might triggered the paleogene high-mg potassic rocks in tibetan plateau. the northward subduction and break-off of the neo-tethyan slab in eocene likely contributed to enrichment of ore-bearing material and formation of porphyric deposits in sanjiang area. |
| WOS关键词 | EAST-WEST EXTENSION ; SOUTHERN TIBET ; NORTHERN TIBET ; LITHOSPHERIC MANTLE ; ULTRAPOTASSIC ROCKS ; LHASA BLOCK ; AR-40/AR-39 GEOCHRONOLOGY ; ISOTOPIC CHARACTERISTICS ; SHOSHONITIC VOLCANISM ; TECTONIC IMPLICATIONS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000279740400019 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2410015 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Chen JianLin |
| 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 | Chen JianLin,Xu JiFeng,Wang BaoDi,et al. Geochemical comparison of paleogene high-mg potassic volcanic rocks in sanjiang area and interior tibetan plateau: compositional difference of the mantle sources.[J]. Acta petrologica sinica,2010,26(6):1856-1870. |
| APA | Chen JianLin,Xu JiFeng,Wang BaoDi,&Kang ZhiQiang.(2010).Geochemical comparison of paleogene high-mg potassic volcanic rocks in sanjiang area and interior tibetan plateau: compositional difference of the mantle sources..Acta petrologica sinica,26(6),1856-1870. |
| MLA | Chen JianLin,et al."Geochemical comparison of paleogene high-mg potassic volcanic rocks in sanjiang area and interior tibetan plateau: compositional difference of the mantle sources.".Acta petrologica sinica 26.6(2010):1856-1870. |
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来源：中国科学院大学
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