安徽庐枞盆地小岭地区深部隐伏侵入岩年代学研究  

Chronological study of concealed intrusions in Xiaoling area,Lujiang-Zongyang basin,Anhui Province

作　　者：张舒[1,2] 周涛发[1] 蔡晓兵[2] 张赞赞[2] 吕博[2] 岳运华 ZHANG Shu ZHOU Taofa CAI Xiaobing ZHANG Zanzan LU Bo YUE Yunhua(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China Geological Survey of Anhui Province, Hefei 230001, China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省地质调查院,安徽合肥230001

出　　处：《合肥工业大学学报（自然科学版）》2017年第3期403-408,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家重点研发计划资助项目(2016YFC0600206);国家自然科学基金资助项目(41320104003;41172086);中国地质调查局地质调查工作资助项目(12120114038001;1212011120862)

摘　　要：安徽庐枞中生代火山岩盆地是长江中下游成矿带重要的铁铜多金属矿集区,区域发育早白垩世火山-侵入岩浆活动;近年来,随着盆地深部找矿工作的推进,发现了大量的深部隐伏侵入体。文章对小岭地区新近施工的钻孔进行了详细的观察与取样,并对深部侵入体进行了锆石U-Pb测年,明确了隐伏正长岩形成于(132.6±1.9)Ma,二长岩形成于(132.5±0.6)Ma,属于砖桥旋回末期岩浆活动的产物。文中对小岭地区的成岩成矿作用时限进行了讨论。The Lujiang-Zongyang Mesozoic volcanic basin in Anhui Province is an important ore concen- trated district in middle-lower Yangtze River valley metallogenic belt. There is early Cretaceous vol- canic-intrusive magmatism in this district. In recent years, a large number of the concealed intrusions in Lujiang-Zongyang basin have been discovered with the deep prospecting. Based on systematic inves- tigations, LA-ICP MS zircon U-Pb dating of the concealed intrusions in Xiaoling area is carried out. The analyses results show that the ages of concealed syenite and monzonite are （132. 6±1.9） Ma and （132.5±0.6） Ma respectively, which formed at the late stage of Zhuanqiao Formation. The duration of magmatism and mineralization in Xiaoling area is discussed.

关 键 词：庐枞盆地 小岭地区 隐伏岩体 年代学研究 

分 类 号：P597.3[天文地球—地球化学]