Continental crust material in subduction complex in southwestern Tianshan-geochemical implications from metabasic rocks
文献类型：期刊论文
| 作者 | Liu Xin1,2; Su Wen1; Gao Jun3; Li Jilei1,4; Jiang Tuo2,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 29期号:5页码:1675-1684 |
| 关键词 | Southwestern Tianshan Subduction complex Eclogite Blueschist Continental crust material |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | A new eclogite block, which is intercalated with garnet-bearing mica schist as lens and retrograded to blueschist in the interface, was found in the Atantayi valley in the southwestern Tianshan HP/UHP metamorphic belt. The eclogite and blueschist have similar geochemical characteristics the SiO2 and TiO2 of the eclogite is 51. 59% similar to 52. 66% and 0. 70% similar to 0. 80%, respectively; for the blueschist the value is 51. 57% similar to 54. 06% and 0. 86% similar to 0. 89%. Both of the eclogite and blueschist have a LREE-enriched, HREE flat and moderate negative Eu anomaly REE pattern, and both kinds of rocks depleted in Ba, Sr, Nb, Ta, Ti, the La/Nb is 3.0 similar to 4. 8 and 2. 1 similar to 3. 7, respectively, resemble the geochemical characteristics of the arc magmatic rocks in active continental margin. The Zr/Hf and Nb/Ta of the eclogite is 36. 5 similar to 37. 1 and 10. 2 similar to 12. 9, and for the buleschist is 35. 9 similar to 36. 4 and 11. 2 similar to 12. 6. Both of the ratios are similar to that of the continental crust. For the eclogite, (Sr-87/Sr-86)(i) = 0. 7091 similar to 0. 7095, epsilon(Nd) (t) = -7. 52 similar to -6. 31, and the value of the blueschist is 0. 7098 similar to 0. 7107 and -7. 70 similar to -7. 13. The geochemical characteristics and Sr-Nd isotope system of the eclogite and blueschist suggest that their protolith have continental crust affinity. It suggests that there is continental material in the southwestern Tianshan subduction complex. |
| WOS关键词 | HP-LT ROCKS ; P-T PATH ; NW-CHINA ; WESTERN TIANSHAN ; SOUTH TIANSHAN ; TECTONIC IMPLICATIONS ; METAMORPHIC EVOLUTION ; PHASE-EQUILIBRIA ; BEARING ECLOGITE ; AGE CONSTRAINTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000321226200015 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87684]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu Xin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany |
| 推荐引用方式 GB/T 7714 | Liu Xin,Su Wen,Gao Jun,et al. Continental crust material in subduction complex in southwestern Tianshan-geochemical implications from metabasic rocks[J]. ACTA PETROLOGICA SINICA,2013,29(5):1675-1684. |
| APA | Liu Xin,Su Wen,Gao Jun,Li Jilei,&Jiang Tuo.(2013).Continental crust material in subduction complex in southwestern Tianshan-geochemical implications from metabasic rocks.ACTA PETROLOGICA SINICA,29(5),1675-1684. |
| MLA | Liu Xin,et al."Continental crust material in subduction complex in southwestern Tianshan-geochemical implications from metabasic rocks".ACTA PETROLOGICA SINICA 29.5(2013):1675-1684. |
入库方式： OAI收割
来源：地质与地球物理研究所
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