Low-Al and high-Al trondhjemites in the Huai'an Complex, North China Craton: Geochemistry, zircon U-Pb and Hf isotopes, and implications for Neoarchean crustal growth and remelting
文献类型：期刊论文
| 作者 | Zhang, Hua-Feng1; Zhai, Ming-Guo2; Santosh, M.3; Li, Sheng-Rong1 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2012-04-30 |
| 卷号 | 49页码:203-213 |
| 关键词 | Tonalite-trondhjemite-granodiorite Geochemistry Zircon geochronology Neoarchean Huai'an North China Craton |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2011.11.004 |
| 文献子类 | Article |
| 英文摘要 | Voluminous tonalite-trondhjemite-granodiorite (TTG) magmas were emplaced in the Huai'an Complex of North China Craton (NCC) during the Neoarchean. Here we present the geochemical characteristics of these rocks and identify low-Al (LAl) and high-Al (HAl) types of trondhjemites within the TTG suite. The LAl group displays high silica (SiO2 = 77-80 wt.%), and low Al2O3 contents (11.06-11.89 wt.%), a strongly peraluminous (A/CNK = 1.16 and 1.19) composition and enrichment in HREE (La-N/Yb-N = 4 and 5, Gd-N/Yb-N = 0.35 and 0.9). Their low Rb (13 and 28 ppm), Th (0.3 and 7.0 ppm), relatively high Na2O/K2O values (3.6 and 4.1) and MgO (0.63 and 0.68 wt.%) with moderately high Mg# (36 and 53), suggest crystallization from a primitive source. The HAl group is characterized by relatively low SiO2 (67.22-71.57 wt.%) and high Al2O3 contents (16.35-16.41 wt.%) with trace element contents and distribution patterns closely comparable to those of Archean high-Al TTGs. Our geochemical data do not favor a direct genetic link between the LAl and HAl trondhjemite groups. The zircon U-Pb data reveal that the LAl and HAl groups represent coeval intrusions at ca. 2.55-2.5 Ga. In situ analysis of Hf isotopes in the zircons (epsilon Hf = +5.6 to +10, and T-DM = 2462-2595 Ma), together with the geochemical features of the low-Al trondhjemites suggest that they were generated under relatively low pressure (<8 kbar), through low degree partial melting of a newly accreted amphibolitic crust. Taking into consideration the contemporaneous (2.55-2.50 Ga) high-Al TTGs widely exposed in the Huai'an Complex, we suggest that the low-Al trondhjemites were formed by intraplating of mantle-derived magmas, and the coeval high-Al TTGs were produced by partial melting of a thickened lower crust, triggered by underplating. Our study attests to a major episode of Neoarchean crustal growth in the NCC, and remelting induced by underplating and intraplating of mantle-derived magmas. (C) 2011 Elsevier Ltd. All rights reserved. |
| WOS关键词 | WESTERN SUPERIOR PROVINCE ; ULTRAHIGH-TEMPERATURE METAMORPHISM ; TRACE-ELEMENT GEOCHEMISTRY ; EARLY CONTINENTAL-CRUST ; SUPERCONTINENT COLUMBIA ; TECTONIC EVOLUTION ; ARCHEAN GRANITES ; MANTLE WEDGE ; LU-HF ; CONSTRAINTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000303699200015 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Natural Science Foundation of China(40772122 ; Natural Science Foundation of China(40772122 ; Ministry of Science and Technology of China(2012CB416603) ; Ministry of Science and Technology of China(2012CB416603) ; 111 project(B07011) ; 111 project(B07011) ; 41030316 ; 41030316 ; 90914002) ; 90914002) ; Natural Science Foundation of China(40772122 ; Natural Science Foundation of China(40772122 ; Ministry of Science and Technology of China(2012CB416603) ; Ministry of Science and Technology of China(2012CB416603) ; 111 project(B07011) ; 111 project(B07011) ; 41030316 ; 41030316 ; 90914002) ; 90914002) ; Natural Science Foundation of China(40772122 ; Natural Science Foundation of China(40772122 ; Ministry of Science and Technology of China(2012CB416603) ; Ministry of Science and Technology of China(2012CB416603) ; 111 project(B07011) ; 111 project(B07011) ; 41030316 ; 41030316 ; 90914002) ; 90914002) ; Natural Science Foundation of China(40772122 ; Natural Science Foundation of China(40772122 ; Ministry of Science and Technology of China(2012CB416603) ; Ministry of Science and Technology of China(2012CB416603) ; 111 project(B07011) ; 111 project(B07011) ; 41030316 ; 41030316 ; 90914002) ; 90914002) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84214]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, Hua-Feng |
| 作者单位 | 1.China Univ Geosci, Dept Geosci & Resources, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Kochi Univ, Fac Sci, Dept Nat Environm Sci, Kochi 7808520, Japan |
| 推荐引用方式 GB/T 7714 | Zhang, Hua-Feng,Zhai, Ming-Guo,Santosh, M.,et al. Low-Al and high-Al trondhjemites in the Huai'an Complex, North China Craton: Geochemistry, zircon U-Pb and Hf isotopes, and implications for Neoarchean crustal growth and remelting[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,49:203-213. |
| APA | Zhang, Hua-Feng,Zhai, Ming-Guo,Santosh, M.,&Li, Sheng-Rong.(2012).Low-Al and high-Al trondhjemites in the Huai'an Complex, North China Craton: Geochemistry, zircon U-Pb and Hf isotopes, and implications for Neoarchean crustal growth and remelting.JOURNAL OF ASIAN EARTH SCIENCES,49,203-213. |
| MLA | Zhang, Hua-Feng,et al."Low-Al and high-Al trondhjemites in the Huai'an Complex, North China Craton: Geochemistry, zircon U-Pb and Hf isotopes, and implications for Neoarchean crustal growth and remelting".JOURNAL OF ASIAN EARTH SCIENCES 49(2012):203-213. |
入库方式： OAI收割
来源：地质与地球物理研究所
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