矿产综合利用2025，Vol.46Issue(1)：8-15,29,9.DOI:10.3969/j.issn.1000-6532.2025.01.002
四川大陆槽稀土矿隐爆角砾岩中石英闪长岩的形成时代及其意义
Formation Age and its Geological Significance of Quartz Diorite from Cryptoexplosive Breccia in Dalucao Rare Earth Mine,Sichuan Province
摘要
Abstract
To limit the diagenetic age of quartz diorite in the crypto-explosion breccia of the Dechang Dalucao in Sichuan Province,LA-ICP-MS zircon U-Pb chronology was carried out.The results show that the LA-ICP-MS U-Pb age of the Dalucao quartz diorite zircon is(751.7±4.6)Ma(n=39),indicating that the diagenetic age is Neoproterozoic,which is similar to the formation age of a large number of medium acid intrusions and volcanic rocks in the western and northern margins of the Yangtze Block.The Dalucao crypto-explosion breccia was formed in the shallow part of the crust,which provided a channel and favorable preservation conditions for the formation of rare earth deposits,suggesting that the deep part of the Dalucao has great potential for rare earth prospecting.关键词
德昌/大陆槽/石英闪长岩/锆石/地质意义Key words
Dechang/Dalucao/Quartz diorite/Zircon/Geological significance分类
地质学引用本文复制引用
杨伟,夏小洪,刘图强,程龙,谢志远,刘上荣,谭洪旗..四川大陆槽稀土矿隐爆角砾岩中石英闪长岩的形成时代及其意义[J].矿产综合利用,2025,46(1):8-15,29,9.基金项目
四川省科技厅项目(2023ZDZX0005、2022ZHCG0124) （2023ZDZX0005、2022ZHCG0124）
四川省自然资源厅项目(KJ-2024-010) （KJ-2024-010）
