Early Paleozoic metamorphic P-T-t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting

doi:10.1016/j.lithos.2024.107659

	Early Paleozoic metamorphic P-T-t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting
	Liang, Yongzhi 1; Qian, Jiahui 1; Yin, Changqing 1; Zhang, Jian 2; Gao, Peng 3; Lu, Chengsen 1; Jin, Xin 4
	2024-09-01
发表期刊	LITHOS
ISSN	0024-4937
卷号	480 页码:19
通讯作者	Qian, Jiahui([email protected])
摘要	The tectono-thermal evolution of the Early Paleozoic orogeny in South China has been debated. In this contribution, detailed studies of petrography, mineral chemistry, phase equilibria modeling, conventional geothermobarometry, and zircon-monazite geochronology were conducted on metamorphic rock samples from the Zhoutan, Longyou, and Chencai groups in the northern Cathaysia Block, South China. All rocks record clockwise P-T paths, including the Pmax (pre-Tmax), Tmax, and post-peak retrograde stages. Sillimanite-garnet-mica gneiss from the Zhoutan Group is characterized by decompression and heating from the Pmax (0.97 GPa/ 710 degrees C) to the Tmax stage (0.70-0.85 GPa/795-815 degrees C). Garnet-amphibole gneiss from the Longyou Group and sillimanite-garnet-biotite gneiss from the Chencai Group experienced Tmax metamorphism at 0.90-1.00 GPa/ 865-880 degrees C and 0.90-1.00 GPa/805-820 degrees C, respectively. LA-ICP-MS zircon-monazite U-Pb dating yields 453-446 Ma for the retrograde metamorphism of the Zhoutan Group, -457 Ma and -432 Ma for the peak and retrograde metamorphism, respectively, of the Longyou Group, and 441-436 Ma for the peak metamorphism of the Chencai Group. This indicates that the Early Paleozoic crustal thickening event may have occurred 10-20 Ma earlier in the western region than in the eastern region of the northern Cathaysia Block. Integrated Early Paleozoic P-T-t data from the Cathaysia Block provide medium-pressure facies series conditions without the products of high-pressure facies series metamorphism, which are common in subduction-to-collision orogens. Based on the current metamorphic characteristics and other geological data for Early Paleozoic orogeny in South China, we infer that the current tectonic domains developing metamorphism-magmatism-deformation may not be the "first scene" of subduction-to-collision. The stress that caused the Early Paleozoic orogeny likely originated from the ancient plate boundaries of South China.
关键词	P-T-t evolution Medium-pressure facies series Early Paleozoic Cathaysia Block Intraplate orogeny
DOI	10.1016/j.lithos.2024.107659
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42325205]; National Natural Science Foundation of China[42372227]; National Natural Science Foundation of China[41972197]; National Natural Science Foundation of China[42025204]; Guangdong Basic and Applied Basic Research Foundation[2024A1515010771]; Guangdong Basic and Applied Basic Research Foundation[2019A1515012189]
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:001250389000001
出版者	ELSEVIER
WOS关键词	SOUTH CHINA ; U-PB ; MAFIC ROCKS ; SHEAR ZONE ; ZIRCON ; GEOCHRONOLOGY ; CONSTRAINTS ; SUBDUCTION ; TERRANE ; GARNET
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186483
专题	深海极端环境与生命过程研究中心
通讯作者	Qian, Jiahui
作者单位	1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Mineral Resources & Geol Pr, Zhuhai 519082, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Liang, Yongzhi,Qian, Jiahui,Yin, Changqing,et al. Early Paleozoic metamorphic P-T-t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting[J]. LITHOS,2024,480:19.
APA	Liang, Yongzhi.,Qian, Jiahui.,Yin, Changqing.,Zhang, Jian.,Gao, Peng.,...&Jin, Xin.(2024).Early Paleozoic metamorphic P-T-t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting.LITHOS,480,19.
MLA	Liang, Yongzhi,et al."Early Paleozoic metamorphic P-T-t evolution of the northern Cathaysia Block (SE China): Implications for thermal history and geodynamic setting".LITHOS 480(2024):19.