Garnet perspectives on the metamorphic history and tectonic significance of Paleoproterozoic high-pressure mafic granulites from the northern North China Craton
文献类型：期刊论文
| 作者 | Wu, Jia-Lin1,6; Zhai, Ming -Guo7,8; Hu, Bo6; Zhang, Hua-Feng5; Chu, Xu4; Zhou, Ning-Chao3; Zhang, Le2; Zhang, Hong1 |
| 刊名 | LITHOS
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 394页码:16 |
| 关键词 | Garnet zoning Prograde metamorphism Paleoproterozoic high-pressure mafic granulites Northern Hengshan North China Craton (NCC) |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2021.106139 |
| 英文摘要 | Reconstructing the pressure-temperature (P-T) evolution of early Precambrian high-pressure granulites and eclogites is critical for decoding the tectono-metamorphic evolution of the early Earth. However, debates continue regarding the P-T history of these rocks because of various modifications by peak and retrograde rehydration meta-morphism. As a significant rock-forming mineral in high-grade metamorphic rocks, garnet not only grows with in-creasing pressure or temperature and develops variably zoned patterns along given P-Tloops, but its properties are stable subsquent toits formation when compared to other minerals in the matrix. Consequently, garnet is excellent for monitoring the thermo-metamorphic history of its host rock during orogeny. Selected garnet grains from the Paleoproterozoic high-pressure mafic granulites in Athe northern Hengshan area of the North China Craton, which exhibit variable microstructural and chemical zoning, present an excellent example for extracting metamorphic evolution of the host rocks. Microstructural zoning displays a zonal distribution of frozen inclusion-type minerals in garnet. Chemically, the garnet shows pronounced compositional zoning, with bell-shaped X-Sps, initially flat and then increasing/decreasing X-Pyr and Fe#, initially increasing and then decreasing XGrs from core to mantle, and re-sorbed rims. Both zoning patterns document multiple generations of radial growth history. The progressive evolu-tion of the host rocks can be furtherdivided into early prograde (M1-1), late prograde (M1-2), near peak (M2-1), and peak (M2-2) stages. The resorption textures indicate the succeeding decompression (M-3) and cooling (M-4) stages. The pseudosection modeling indicates P-T conditions from M1-1 to M2-1 of 6-9 kbar/600-700 degrees C, 9-11.2 kbar/680- 740 degrees C and 12-15 kbar/735-785 degrees C, respectively. Although the peak metamorphic information of M2-2 is lost be-cause of the breakdown of the garnet rim, plausible P-T results are estimated at similar to 15-17 kbar/similar to 790-810 degrees C. These conditions prevailed to the transitional eclogite-granulite facies through qualitative reconstruction of the original composition of clinopyroxene, modal proportion, and rim composition of the garnet. The subsequent conditions of decompression (M-3) and cooling (M-4) stages were roughly estimated at similar to 7-10 kbar/similar to 800-850 degrees C and 3-5 kbar/ 650-680 degrees C. Together, they define a clockwise P-T path in response to the Paleoproterozoic orogeny involved in the assembly of the North China Craton. The zoned garnet suggests that the host mafic granulite documents a rel-atively complete progressive metamorphic history, which probably correlates with subduction processes. The re-sorbed rim sequentially records exhumation and cooling processes. Furthermore, the preservation of growth zoning in granulitic garnet and near-isothermal decompression P-Tpath suggests that the host rocks must have ex-perienced avery short peak metamorphism and a rapid exhumation process to the middle crust. These findings sug-gest that the tectonic processes involved in the formation of the Paleoproterozoic northern Hengshan granulite terrane might be similar to those of the Phanerozoic continental collisional orogens under modern plate tectonic re-gimes; however, they record relatively higher apparent thermal gradients (similar to 14-16 degrees C /km). (C) 2021 Published by Elsevier B.V. |
| WOS关键词 | P-T EVOLUTION ; HENGSHAN COMPLEX ; PELITIC GRANULITES ; FACIES ROCKS ; ZIRCON AGES ; CONSTRAINTS ; PETROLOGY ; PHASES ; QUARTZ ; TEMPERATURE |
| 资助项目 | Natural Science Foundation of China[41890834] ; Natural Science Foundation of China[41702196] ; Natural Science Foundation of China[41703023] ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University[18LCD12] ; Shaanxi Provincial Department of Science and Technology[2020JQ-355] ; Shaanxi Provincial Department of Science and Technology[2019JM-056] ; Fundamental Research Funds for the Central Universities, CHD, China[300102279302] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000674568300004 |
| 出版者 | ELSEVIER |
| 资助机构 | Natural Science Foundation of China ; Natural Science Foundation of China ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Shaanxi Provincial Department of Science and Technology ; Shaanxi Provincial Department of Science and Technology ; Fundamental Research Funds for the Central Universities, CHD, China ; Fundamental Research Funds for the Central Universities, CHD, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Shaanxi Provincial Department of Science and Technology ; Shaanxi Provincial Department of Science and Technology ; Fundamental Research Funds for the Central Universities, CHD, China ; Fundamental Research Funds for the Central Universities, CHD, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Shaanxi Provincial Department of Science and Technology ; Shaanxi Provincial Department of Science and Technology ; Fundamental Research Funds for the Central Universities, CHD, China ; Fundamental Research Funds for the Central Universities, CHD, China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Shaanxi Provincial Department of Science and Technology ; Shaanxi Provincial Department of Science and Technology ; Fundamental Research Funds for the Central Universities, CHD, China ; Fundamental Research Funds for the Central Universities, CHD, China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101963]  |
| 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 | Wu, Jia-Lin; Hu, Bo |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Xian Ctr Geol Survey, MLR Key Lab Study Focused Magmatism & Giant Ore D, Xian, Peoples R China 4.Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada 5.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 6.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China 7.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 8.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Jia-Lin,Zhai, Ming -Guo,Hu, Bo,et al. Garnet perspectives on the metamorphic history and tectonic significance of Paleoproterozoic high-pressure mafic granulites from the northern North China Craton[J]. LITHOS,2021,394:16. |
| APA | Wu, Jia-Lin.,Zhai, Ming -Guo.,Hu, Bo.,Zhang, Hua-Feng.,Chu, Xu.,...&Zhang, Hong.(2021).Garnet perspectives on the metamorphic history and tectonic significance of Paleoproterozoic high-pressure mafic granulites from the northern North China Craton.LITHOS,394,16. |
| MLA | Wu, Jia-Lin,et al."Garnet perspectives on the metamorphic history and tectonic significance of Paleoproterozoic high-pressure mafic granulites from the northern North China Craton".LITHOS 394(2021):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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。