Petrogenesis of late mesozoic adakitic andesites from pujiang area in zhejiang province, eastern china
文献类型：期刊论文
| 作者 | Qin SheCai; Fan WeiMing; Guo Feng; Li ChaoWen; Gao XiaoFeng |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2006-09-01 |
| 卷号 | 22期号:9页码:2305-2314 |
| 关键词 | Adakitic andesites Petrogenesis Pujiang area in zhejiang province Late mesozoic |
| ISSN号 | 1000-0569 |
| 通讯作者 | Qin shecai(pusqsc@mail.sysu.edu.cn) |
| 英文摘要 | Late mesozoic adakitic andesites found in the laocun formation from the pujiang area in zhejiang province are geochemically distinct from the contemporaneous calc-alkaline felsic volcanic rocks in the southeastern coast areas of china. these rocks span a sio(2) range of 57.64% similar to 62.61% and mgo 2.29% similar to 3.43%,characterized by high al(2)o(3)( > 16%), na(2)o (4.01% similar to 4.52%), na(2)o/k(2)o (1.94 similar to 5.51 with an average of 2. 89) and sr (583 similar to 643 mu g/g), and low y (11.4 similar to 13.2 mu g/g) and hree (e. g., yb = 1. 16 similar to 1. 26 mu g /g). they have lower ((87)sr/(86)sr)(i) (0.7041 similar to 0.7043) and higher epsilon(nd) (t) (0.3 similar to 2.3) than the contemporaneous counterparts in the area and along the southeastern coast regions of china. all these geochemical features are similar to adakites occurring in modern subduction zones. their even lower ((87)sr/(86)sr)(i) ratios than the contemporaneous mafic rocks are inconsistent with an origin of differentiates of the mafic magmas by fractional crystallization or assimilation via fractional crystallization. since there lacks robust evidence for late mesozoic oceanic ridge subduction toward the southeastern coast regions of china, these rocks were probably derived from crustal anatexis, and the higher epsilon(nd) (t) and lower t(dm) called for an important contribution of juvenile material in the source. considering the late mesozoic extensional regime in the region, we relate the petrogenesis of these adakitic magmas to the mesozoic crustal growth, consistent with the existence of mesozoic high-epsilon(nd) (t) and low-t(dm) "shi-hang belt". |
| WOS关键词 | SOUTHEASTERN CHINA ; SOUTH CHINA ; GEOCHEMISTRY ; MAGMAS ; ROCKS ; CRUST ; LITHOSPHERE ; GENERATION ; GENESIS ; ORIGIN |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000242107400005 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379129 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Qin SheCai |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin SheCai,Fan WeiMing,Guo Feng,et al. Petrogenesis of late mesozoic adakitic andesites from pujiang area in zhejiang province, eastern china[J]. Acta petrologica sinica,2006,22(9):2305-2314. |
| APA | Qin SheCai,Fan WeiMing,Guo Feng,Li ChaoWen,&Gao XiaoFeng.(2006).Petrogenesis of late mesozoic adakitic andesites from pujiang area in zhejiang province, eastern china.Acta petrologica sinica,22(9),2305-2314. |
| MLA | Qin SheCai,et al."Petrogenesis of late mesozoic adakitic andesites from pujiang area in zhejiang province, eastern china".Acta petrologica sinica 22.9(2006):2305-2314. |
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来源：中国科学院大学
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