| Geochemistry and tectonic affinity of shahewan orogenic rapakivi from qinling | |
| Zhou Bin1; Wang FangYue2,3; Sun Yong1; Sun WeiDong2; Ding Xing2,3; Hu YanHua2,3; Ling MingXing2,3 | |
| 刊名 | Acta petrologica sinica
 |
| 2008-06-01 | |
| 卷号 | 24期号:6页码:1261-1272 |
| 关键词 | Shahewan Rapikivi Geochemistry Syn-collision Qinling orogenic belt |
| ISSN号 | 1000-0569 |
| 通讯作者 | Zhou bin(chowbun@126.com) |
| 英文摘要 | The shahewan granite pluton is located near shangzhou, in qingling orogenic belt, central china. it was regarded as rapakivi based on petrographic studies, which is taken as part of a triassic "rapakivi belt" in the north qinling mountains. although the formation of rapakivi is still not well understood, it is usually formed more than 100ma after collision, and thus the rapakivi belt in the qinling orogen was used to argue for that the main collision between the south and north china blocks occurred much earlier than the final collision in triassic. therefore, detailed study on the geochemical characteristics of the shahewan granite is important to understanding its tectonic affinity and, the evolution of qinling orogenic belt. in this study, we analyzed the major and trace element compositions of samples from shahewan and nearby syn-collisional granites. our results show that the shahewan granite has the same geochemical characteristics as those of the nearby caoping granites and other syn-collisional granites all along the south qinling granite belt, but dramatically different from typical rapakivi. it has high al(2)o(3) content, ranging from 14.53% to 16.2%, and is enriched in lree and lile, with sio(2) content of 64.99% similar to 69.69%. remarkably, there is no obvious (eu/eu*), anomaly (0.83 similar to 1.10) in the shahewan granite, which is distinctively different from typical rapakivi. therefore, shahewan granite is more likely to be an orogenic rapakivi, which cannot represent the end of the collision between the north and south china blocks along the qinling orogenic belt, nor resulted from an early collision along the shang-dan fault. instead, it was formed in a geological setting similar to caoping and other south qinling granite plutons. |
| WOS关键词 | A-TYPE GRANITES ; CENTRAL CHINA ; NORTH ; ROCKS ; DISCRIMINATION ; DELAMINATION ; CONVERGENCE ; LITHOSPHERE ; CONSTRAINTS ; MOUNTAINS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000259628800009 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2392813 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhou Bin |
| 作者单位 | 1.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou Bin,Wang FangYue,Sun Yong,et al. Geochemistry and tectonic affinity of shahewan orogenic rapakivi from qinling[J]. Acta petrologica sinica,2008,24(6):1261-1272. |
| APA | Zhou Bin.,Wang FangYue.,Sun Yong.,Sun WeiDong.,Ding Xing.,...&Ling MingXing.(2008).Geochemistry and tectonic affinity of shahewan orogenic rapakivi from qinling.Acta petrologica sinica,24(6),1261-1272. |
| MLA | Zhou Bin,et al."Geochemistry and tectonic affinity of shahewan orogenic rapakivi from qinling".Acta petrologica sinica 24.6(2008):1261-1272. |
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