Zircon U-Pb and phlogopite Ar-40-Ar-39 age of the Chengchao and Jinshandian skarn Fe deposits, southeast Hubei Province, Middle-Lower Yangtze River Valley metallogenic belt, China

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	Zircon U-Pb and phlogopite Ar-40-Ar-39 age of the Chengchao and Jinshandian skarn Fe deposits, southeast Hubei Province, Middle-Lower Yangtze River Valley metallogenic belt, China
	Xie, GQ (Xie, Guiqing); Mao, JW (Mao, Jingwen); Zhao, HJ (Zhao, Haijie); Duan, C (Duan, Chao); Yao, L (Yao, Lei)
刊名	MINERALIUM DEPOSITA
	2012
卷号	47 期号:6 特刊 SI 页码:633-652
关键词	Skarn Fe deposit Phlogopite Ar-40-Ar-39 Zircon U-Pb Lithospheric thinning Middle-Lower Yangtze River Valley metallogenic belt China
ISSN号	0026-4598
英文摘要	The Chengchao and Jinshandian deposits in the southeast Hubei Province are the two largest skarn Fe deposits in the Middle-Lower Yangtze River Valley metallogenic belt (MLYRVMB), China. They are characterized by NW-striking orebodies that are developed along the contacts between the Late Mesozoic granitoid and Triassic carbonate and clastic rocks. New sensitive high-resolution ion microprobe and laser ablation inductively coupled plasma mass spectrometry zircon U-Pb dating of the mineralization-related quartz diorite and granite at Chengchao yield ages of 129 +/- 2 and 127 +/- 2 Ma, respectively, and those at Jinshandian of 127 +/- 2 and 133 +/- 1 Ma, respectively. These results are interpreted as the crystallization age of these intrusions. Hydrothermal phlogopite samples from the skarn ores at Chengchao and Jinshandian have the plateau Ar-40-Ar-39 ages of 132.6 +/- 1.4 and 131.6 +/- 1.2 Ma, respectively. These results confirm that both intrusions and associated skarn Fe mineralization were formed contemporaneously in the middle Early Cretaceous time. New zircon U-Pb and phlogopite Ar-40-Ar-39 ages in this study, when combined with available precise geochronological data, demonstrate that there were two discontinuous igneous events, corresponding to two episodes of skarn Fe-bearing mineralization in the southeast Hubei Province (1) 140-136 Ma diorites and quartz diorites and 141-137 Ma skarn Cu-Fe or Fe-Cu deposits and (2) 133-127 Ma quartz diorites and granites and 133-132 Ma skarn Fe deposits. This scenario is similar to that proposed for the entire MLYRVMB. The intrusions related to skarn Fe deposits show obviously petrological and geochemical differences from those related to skarn Cu-Fe or Fe-Cu deposits. The former are quartz diorite and diorite in petrology and have similar adakitic geochemical signatures and in equilibrium with a garnet-rich residue, whereas the latter are petrologically granite and quartz diorite that are distinguishable from adakitic rocks and in equilibrium with a plagioclase residue. These features indicated that two episodes of magmatism and the formation of skarn Fe-bearing deposits in the southeast Hubei Province, MLYRVMB, might be associated lithosphere thinning induced by asthenosphere upwelling during the Late Mesozoic.
学科主题	矿床地质
WOS关键词	LATE MESOZOIC GRANITOIDS ; EAST-CENTRAL CHINA ; MOLYBDENITE RE-OS ; VOLCANIC-ROCKS ; LOWER REACHES ; ANHUI PROVINCE ; GEOLOGICAL IMPLICATIONS ; ISOTOPIC COMPOSITIONS ; TECTONIC IMPLICATIONS ; IGNEOUS ROCKS
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000307267700005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39563]
专题	中国地质调查局
作者单位	China Univ Geosci, Fac Geosci & Resources, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xie, GQ ,Mao, JW ,Zhao, HJ ,et al. Zircon U-Pb and phlogopite Ar-40-Ar-39 age of the Chengchao and Jinshandian skarn Fe deposits, southeast Hubei Province, Middle-Lower Yangtze River Valley metallogenic belt, China[J]. MINERALIUM DEPOSITA,2012,47(6 特刊 SI):633-652.
APA	Xie, GQ ,Mao, JW ,Zhao, HJ ,Duan, C ,&Yao, L .(2012).Zircon U-Pb and phlogopite Ar-40-Ar-39 age of the Chengchao and Jinshandian skarn Fe deposits, southeast Hubei Province, Middle-Lower Yangtze River Valley metallogenic belt, China.MINERALIUM DEPOSITA,47(6 特刊 SI),633-652.
MLA	Xie, GQ ,et al."Zircon U-Pb and phlogopite Ar-40-Ar-39 age of the Chengchao and Jinshandian skarn Fe deposits, southeast Hubei Province, Middle-Lower Yangtze River Valley metallogenic belt, China".MINERALIUM DEPOSITA 47.6 特刊 SI(2012):633-652.