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Paleo-Mesoarchean crustal growth and reworking in the western Dharwar Craton, southwestern India: Evidence from trondhjemitic gneiss and granitic gneiss

文献类型：期刊论文

作者Ao, Wenhao2; Zhai, Mingguo1,2,4; Zhao, Yan2; Zhang, Chengli2; Sun, Yong2; George, P. M.2,3; Sajeev, K.3; Gou, Longlong2; Lu, Junsheng2; Hu, Yuhua2
刊名PRECAMBRIAN RESEARCH
出版日期2021-12-01
卷号367页码:21
ISSN号0301-9268
关键词Paleoarchean trondhjemitic gneiss Mesoarchean granitic gneiss zircon U-Pb-Hf isotopes Whole-rock geochemistry Crustal growth and reworking Western Dharwar Craton
DOI10.1016/j.precamres.2021.106428
英文摘要Paleo-Mesoarchean felsic orthogneisses are widely exposed in the southern part of the western Dharwar Craton (WDC), southern India shield. The felsic orthogneisses studied in this paper from the WDC can be divided into two groups based on their geological, geochronological, and geochemical data: the 3.4-3.3 Ga trondhjemitic gneiss (including trondhjemitic veins) and the similar to 3.1-3.0 Ga granitic gneiss. The 3.4-3.3 Ga trondhjemitic gneiss is characterized by high contents of SiO2 (70.4-73.1 wt%), Na2O (5.49-5.91 wt%) and Sr (647-740 ppm), high ratios of Na2O/K2O (4.7-7.7) and Sr/Y (53-106), but relatively lower Mg# values (32-39), and Cr (9.5-28.7 ppm) and Ni (1.34-5.33 ppm) concentrations, as well as insignificant Eu anomalies, fractionated REE patterns and mostly positive zircon epsilon(Hf)(t) values (+0.8-+5.9). These data indicate that the trondhjemitic gneiss was derived from partial melting of juvenile mafic crust in a relatively moderate-shallow depth, with residual mineral assemblage of garnet, amphibole and clinopyroxene, implying crustal growth event at 3.4-3.3 Ga. By contrast, the similar to 3.1-3.0 Ga granitic gneiss is characterized by relatively lower contents of Na2O (3.82-4.63 wt%) and Sr (96.9-291 ppm), low ratios of Na2O/K2O (1.4-1.7) and Sr/Y (3.02-8.65), as well as significantly negative Eu anomalies and negative to positive zircon epsilon(Hf)(t) values (-5.6-+4.5). Therefore, the granitic gneiss was probably derived from partial melting of pre-existing crustal rocks, suggesting a prominent crustal reworking event at similar to 3.1-3.0 Ga. This study emphasizes that the western Dharwar Craton is dominated by Paleoarchean (3.4-3.2 Ga) crustal growth event and a strong crustal reworking event in early Mesoarchean (similar to 3.1-3.0 Ga), though the Mesoarchean crustal growth event is discernible, evidenced by regional similar to 3.0 Ga TTG rocks. The early Mesoarchean (similar to 3.1-3.0 Ga) crustal reworking event, represented by series of potassium-rich granites, is also reported in other Archean cratons, and thus it may have global significances.
WOS关键词ZIRCON U-PB ; CHITRADURGA SCHIST BELT ; ARCHEAN CONTINENTAL-CRUST ; SM-ND AGES ; SOUTHERN INDIA ; PLATE-TECTONICS ; GRANODIORITE TTG ; SINGHBHUM CRATON ; GREENSTONE-BELT ; EXPERIMENTAL CONSTRAINTS
资助项目National Natural Science Foundation of China[41890831] ; National Natural Science Foundation of China[41802199] ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China
WOS研究方向Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000724797900001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China ; MOST Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China
源URL[http://ir.iggcas.ac.cn/handle/132A11/103778]  
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Zhai, Mingguo; Zhao, Yan
作者单位1.Univ Chinese Acad Sci, Coll Earth Sci, Key Lab Computat Earth Dynam, Beijing 100049, Peoples R China
2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
3.Indian Inst Sci, Ctr Earth Sci, Bangalore 560012, Karnataka, India
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Ao, Wenhao,Zhai, Mingguo,Zhao, Yan,et al. Paleo-Mesoarchean crustal growth and reworking in the western Dharwar Craton, southwestern India: Evidence from trondhjemitic gneiss and granitic gneiss[J]. PRECAMBRIAN RESEARCH,2021,367:21.
APA Ao, Wenhao.,Zhai, Mingguo.,Zhao, Yan.,Zhang, Chengli.,Sun, Yong.,...&Hu, Yuhua.(2021).Paleo-Mesoarchean crustal growth and reworking in the western Dharwar Craton, southwestern India: Evidence from trondhjemitic gneiss and granitic gneiss.PRECAMBRIAN RESEARCH,367,21.
MLA Ao, Wenhao,et al."Paleo-Mesoarchean crustal growth and reworking in the western Dharwar Craton, southwestern India: Evidence from trondhjemitic gneiss and granitic gneiss".PRECAMBRIAN RESEARCH 367(2021):21.

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来源：地质与地球物理研究所

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