辽东翁泉沟硼矿区二长花岗岩脉锆石U-Pb年龄及对成矿时代的制约

doi:10.13686/j.cnki.dzyzy.2022.03.009

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Abstract A monzogranite dike cuts through the ludwigite orebody in the open pit of Wengquangou boron deposit, Liaodong Peninsula. Samples of the dike are collected for thin section and zircon LA-ICP-MS U-Pb geochronology analysis. The monzogranite dike is characterized by high SiO₂ content(71.82%-75.68%) and high Na₂O+K₂O content (8.41%-10.57%), belonging to calc alkali-high K calc alkaline series granite. The zircon grains in the dikes are euhedral column in shape and dark in the CL image due to the high uranium content. The U-Pb upper intercept age is 1842±29 Ma, among which 9 testing points yield the weighted average age of 1842±30 Ma, indicating that the emplacement age of dike was Late Paleoproterozoic and the Wengquangou ludwigite deposit should be formed earlier. The age is consistent with the post-peak time of metamorphism in the Paleoproterozoic Jiao-Liao-Ji orogeny, reflecting the boron mineralization occurred during the process.

Key words： zircon LA-ICP-MS U-Pb age Jiao-Liao-Ji orogenic belt Wengquangou ludwigite Liaoning Province

Received: 20 March 2022

PACS:	P619.2
	P597.1

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	ZHAO Yan
	LI Sheng-hui
	YANG Zhong-zhu
	ZHANG Peng
	CHEN Jing-sheng
	ZHANG Jing
	CHEN Cong

Cite this article:

ZHAO Yan,LI Sheng-hui,YANG Zhong-zhu等. ZIRCON U-Pb DATING OF MONZOGRANITE DIKES IN WENGQUANGOU BORON OREFIELD, EASTERN LIAONING:Constraints on Metallogenic Age[J]. GEOLOGY AND RESOURCES, 2022, 31(3): 342-350.

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http://manu25.magtech.com.cn/Jweb_dzyzy/EN/10.13686/j.cnki.dzyzy.2022.03.009 OR http://manu25.magtech.com.cn/Jweb_dzyzy/EN/Y2022/V31/I3/342

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