Generation and maturation of Mesoarchean continental crust in the Anshan Complex, North China Craton
文献类型：期刊论文
| 作者 | Wang, Ya-Fei1,2; Li, Xian-Hua1; Jin, Wei3; Zeng, Lingsen2; Zhang, Jia-Hui3 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2020-06-01 |
| 卷号 | 341页码:66 |
| 关键词 | Anshan Archean granitoids Crustal generation and maturation Secular change Zircon U-Pb-Hf-O isotopes |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2020.105651 |
| 英文摘要 | The mechanisms underlying the generation of tonalite-trondhjemite-granodiorite suites and the transition to K-rich granitoids, which marks the most profound stage of Archean intracrustal differentiation, remain controversial. The Archean Anshan Complex (AAC) of the North China Craton (NCC) preserves diverse 3.8-2.5 Ga granitoids, providing an excellent opportunity to address these problems. We conducted a detailed field, petrological, geochemical, and zircon isotopic study on AAC units, demonstrating that: (1) the Li-Dong-Ying trondhjemite intrudes and encloses ca. 3.3 Ga gneiss-migmatite complex across the Anshan, and crystallized at ca. 3.14 Ga; and (2) the porphyritic and fine-grained Chentaigou monzogranites were emplaced contemporaneously with the trondhjemite, both at ca. 3.14 Ga. The Li-Dong-Ying trondhjemites show high SiO2, Na2O, low MgO, significant variations in Sr, Y, and Yb, REE fractionation (La-N/Yb-N = 9-140), and variable Eu anomalies (Eu/Eu* = 0.4-1.3). The magmatic zircons yield delta O-18 of +4.8 +/- 0.2 parts per thousand to +6.9 +/- 0.4 parts per thousand and initial epsilon Hf of -1.1 +/- 0.7 to +4.4 +/- 0.9, which translate to TDM ages of 3.6-3.3 Ga. The Chentaigou monzogranites have higher SiO2 and K2O, lower Na2O and CaO, similar delta O-18 of +5.1 +/- 0.3 parts per thousand to +7.0 +/- 0.3 parts per thousand, and more negative Eu anomalies as compared with the trondhjemites. The Hf-O isotopes, geochemistry, particularly considerable variations in pressure-sensitive proxies of the trondhjemites, suggest that they were derived by melting of low-temperature altered basaltic rocks at 1.0-1.5 GPa and 900-950 degrees C, leaving a garnet amphibolite residue with variable amounts of plagioclase but no rutile; the most plausible source is ca. 3.3 Ga basaltic rocks. Polybaric melting of basaltic sources and fractionation of hornblende and plagioclase from trondhjemitic magmas account for the chemical variability of AAC granitoids, providing a mechanism for the coeval emplacement of diverse Archean granitoids. Secular compositional changes in AAC trondhjemites imply that the depth and interval of melting of basaltic sources increased from the Eoarchean to Mesoarchean. Changes in the nature of the source and melting depth characterized the early stage of Archean intracrustal differentiation in the NCC. |
| WOS关键词 | TRONDHJEMITE-GRANODIORITE TTG ; HF ISOTOPE SYSTEMATICS ; ZIRCON U-PB ; EXPERIMENTAL CONSTRAINTS ; ARCHEAN TRONDHJEMITES ; WORKING REFERENCE ; SILICATE MELTS ; TRACE-ELEMENTS ; NUK GNEISS ; LU-HF |
| 资助项目 | National Natural Science Foundation of China[41602204] ; National Natural Science Foundation of China[41890831] ; State Key Laboratory of Lithospheric Evolution, IGGCAS[Z1005] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000528207600007 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS ; State Key Laboratory of Lithospheric Evolution, IGGCAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96228]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Wang, Ya-Fei; Li, Xian-Hua |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Beijing 100037, Peoples R China 3.Jilin Univ, Coll Earth Sci, Changchun 130026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Ya-Fei,Li, Xian-Hua,Jin, Wei,et al. Generation and maturation of Mesoarchean continental crust in the Anshan Complex, North China Craton[J]. PRECAMBRIAN RESEARCH,2020,341:66. |
| APA | Wang, Ya-Fei,Li, Xian-Hua,Jin, Wei,Zeng, Lingsen,&Zhang, Jia-Hui.(2020).Generation and maturation of Mesoarchean continental crust in the Anshan Complex, North China Craton.PRECAMBRIAN RESEARCH,341,66. |
| MLA | Wang, Ya-Fei,et al."Generation and maturation of Mesoarchean continental crust in the Anshan Complex, North China Craton".PRECAMBRIAN RESEARCH 341(2020):66. |
入库方式： OAI收割
来源：地质与地球物理研究所
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