Geochronology and geochemistry of chuzhou and shangyaopu adakitic intrusive rocks in the eastern area of anhui province: implications for petrogenesis and mineralization
文献类型：期刊论文
| 作者 | Zi, F.; Wang, Q.; Dai, S. Q.; Xu, W.; Xu, J. F.; Qiu, H. N.; Liang, X. R.; Tu, X. L.; Liu, Y. |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2007-06-01 |
| 卷号 | 23期号:6页码:1485-1500 |
| 关键词 | Adakite Delamination Lower crust Copper deposits Chuzhou Eastern china |
| ISSN号 | 1000-0569 |
| 通讯作者 | Wang, q.(wqiang@gig.ac.en) |
| 英文摘要 | The chuzhou and shangyaopu plutons are located in the eastern area of the yangtze craton and to the east of the tan-lu fault belt, and associated with cu ( an or fe) mineralization. they have (40) ar-(39) ar ages ( biotite) of 127. 17 +/- 0. 40ma, 129. 90 +/- 0.23ma, respectively. the chuzhou and shangyaopu intrusive rocks are geochemically similar to adakites, e. g., sio(2) > 56%, high al(2)o(3) (14. 84% similar to 16. 38%), sr (369 x 10(-6) similar to 1335 x 10(-6)), sr/y (43 similar to 185) and la/yb (22 similar to 44), but low y (5. 51 x 10(-6) similar to 11. 0 x 10 (-6)) and yb (0. 51 x 10(-6) similar to 1. 09 x 10(-6)), with negligible to positive eu anomalies (delta eu = (0. 75 similar to 1. 28). moreover, most samples have relatively high mgo (2. 23% similar to 5. 25%), mg(#)(53 similar to 68), cr(89. 6 x 10(-6) similar to 206 x 10(-6)) and ni (43. 0 x 10(-6) similar to 72.0 x 10(-6)) values, similar to high-mg andesites. the chuzhou and shangyaopu adakitic rocks exhibit high ( (87) sr/(86) sr)(i) (0. 7060 0. 7067) and low epsilon(nd) 0 ( - 11. 53 similar to - 14. 07), indicating that they were impossibly derived by partial melting of subducting oceanic crust. we suggest that the chuzhou and shangyaopu adakitic rocks were most probably generated by partial melting of delaminated lower crust. the interaction between these adakitic magmas and surrounding mantle peridotites possibly took place during the ascent of magmas: on the one side, mgo, cr and ni contents of the adakitic magmas were remarkably elevated due to the contamination of mantle peridotites; on the other side, the fe,03 from the adakitic magmas was likely added into the mantle and the oxygen fugacites (integral o(2)) of the mantle were obviously elevated, which made metallic sulfide in the mantle oxidized and the chalcophile elements were incorporated into the adakitic magmas in the form of sulphate. en route to the shallow part of crust, the adakitic magmas enriched in metallogenetic materials possibly released cu or an owing to the rapid depressing of temperature, pressure and fugacites (integral o(2)) which led to cu or an mineralization. |
| WOS关键词 | EPITHERMAL GOLD DEPOSITS ; LOWER CONTINENTAL-CRUST ; NORTHERN DABIE COMPLEX ; THICKENED LOWER CRUST ; CU-AU MINERALIZATION ; PORPHYRY COPPER ; ISOTOPIC COMPOSITIONS ; SOUTHEASTERN CHINA ; SOUTHERN TIBET ; VOLCANIC-ROCKS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000248791900023 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2382744 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Q. |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Acad Geol Survey Anhui Prov, Hefei 230001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zi, F.,Wang, Q.,Dai, S. Q.,et al. Geochronology and geochemistry of chuzhou and shangyaopu adakitic intrusive rocks in the eastern area of anhui province: implications for petrogenesis and mineralization[J]. Acta petrologica sinica,2007,23(6):1485-1500. |
| APA | Zi, F..,Wang, Q..,Dai, S. Q..,Xu, W..,Xu, J. F..,...&Liu, Y..(2007).Geochronology and geochemistry of chuzhou and shangyaopu adakitic intrusive rocks in the eastern area of anhui province: implications for petrogenesis and mineralization.Acta petrologica sinica,23(6),1485-1500. |
| MLA | Zi, F.,et al."Geochronology and geochemistry of chuzhou and shangyaopu adakitic intrusive rocks in the eastern area of anhui province: implications for petrogenesis and mineralization".Acta petrologica sinica 23.6(2007):1485-1500. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。