Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications
文献类型：期刊论文
| 作者 | Li, Deng-Feng1,2,3; Zhang, Li1; Chen, Hua-Yong1; Hollings, Pete3; Cao, Ming-Jian4; Fang, Jing1,2; Wang, Cheng-Ming1,2; Lu, Wan-Jian1,2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2016 |
| 卷号 | 115页码:442-454 |
| 关键词 | High Mg dioritic dikes Mantle-derived magma Eastern Tianshan Central Asian Orogenic Belt |
| DOI | 10.1016/j.jseaes.2015.10.018 |
| 文献子类 | Article |
| 英文摘要 | Zircon U-Pb ages of high Mg dioritic dikes in the Mesoproterozoic Kawabulake Group in the Eastern Tianshan area, NW China indicate that they were emplaced in the Early Carboniferous at 353-348 Ma. The dikes consist of medium-grained plagioclase and hornblende with minor clinopyroxene and trace quartz. They are characterized by intermediate SiO2 (60-62 wt.%), low TiO2 (0.63-0.71 wt.%), relatively high Al2O3 (15.1-15.8 wt.%) and MgO contents (3.45-4.15 wt.%) with Mg# generally higher than 56 (56-59). The geochemistry of the high Mg diorites suggest they were formed by similar magmatic processes to sanukitoid high Mg Andesites such as those of the Setouchi volcanic belt, Japan. Zircons from the high Mg dioritic dikes have epsilon Hf(t) values of -6.8 to +14.5. The dominantly positive values suggest a juvenile source, whereas the small number of negative values suggests mature components were also incorporated into the source. Similarly, the positive epsilon Nd(t) values (0 to +2.2) are interpreted to reflect a juvenile source whereas the negative values of(-5.2 to 0) suggest participation of old crustal rocks in the petrogenesis of the diorites. The variable epsilon Hf(t) and epsilon Nd(t) values suggest that the mature material was assimilated during magma ascent rather than in the mantle wedge which would result in more uniform values. Mass balance calculations suggest that the dioritic dikes were derived from sources composed of approximately 97% juvenile mantle-derived material and 3% sediment. Petrographic, elemental, and isotopic evidence suggest that the dioritic dikes were generated by partial melting of depleted mantle that migrated into the shallow crust where it assimilated older sedimentary rocks of the Mesoproterozoic Kawabulake Group. (c) 2015 Published by Elsevier Ltd. |
| WOS关键词 | SETOUCHI VOLCANIC BELT ; PLASMA-MASS SPECTROMETRY ; ASIAN OROGENIC BELT ; BONINITE SERIES VOLCANICS ; HIGH-MAGNESIAN ANDESITES ; HF ISOTOPE EVIDENCE ; U-PB AGE ; TRACE-ELEMENT ; CONTINENTAL-CRUST ; LASER-ABLATION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000367862300032 |
| 资助机构 | Chinese National Basic Research 973-Program(2014CB440802) ; Chinese National Basic Research 973-Program(2014CB440802) ; National Natural Science Foundation of China (NSFC)(41072062 ; National Natural Science Foundation of China (NSFC)(41072062 ; Office of Project(305) ; Office of Project(305) ; 40730421) ; 40730421) ; Chinese National Basic Research 973-Program(2014CB440802) ; Chinese National Basic Research 973-Program(2014CB440802) ; National Natural Science Foundation of China (NSFC)(41072062 ; National Natural Science Foundation of China (NSFC)(41072062 ; Office of Project(305) ; Office of Project(305) ; 40730421) ; 40730421) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62109]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Lakehead Univ, Dept Geol, Thunder Bay, ON P7B 5E1, Canada 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Deng-Feng,Zhang, Li,Chen, Hua-Yong,et al. Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,115:442-454. |
| APA | Li, Deng-Feng.,Zhang, Li.,Chen, Hua-Yong.,Hollings, Pete.,Cao, Ming-Jian.,...&Lu, Wan-Jian.(2016).Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications.JOURNAL OF ASIAN EARTH SCIENCES,115,442-454. |
| MLA | Li, Deng-Feng,et al."Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications".JOURNAL OF ASIAN EARTH SCIENCES 115(2016):442-454. |
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来源：地质与地球物理研究所
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