广西栗木泡水岭印支期岩体LA-ICP-MS锆石U-Pb年龄及其地质意义  

LA-ICP-MS zircon U-Pb dating of Indosinian rock mass in Paoshuiling of Limu, Guangxi and its geological implications

作　　者：娄峰[1,2] 伍静[3] 陈国辉[1] 

机构地区：[1]中山大学地球科学系,广东广州510275 [2]广东省地质过程与矿产资源探查重点实验室,广东广州510275 [3]中国科学院广州地球化学研究所,广东广州510640

出　　处：《地质通报》2014年第7期960-965,共6页Geological Bulletin of China

基　　金：国家自然科学基金项目(批准号:41372223)

摘　　要：广西栗木泡水岭花岗岩LA-ICP-MS锆石U-Pb年龄显示,泡水岭花岗岩体可能存在3期岩浆活动:210Ma、222Ma和239Ma,佐证了栗木岩体是印支期岩浆活动的产物。结合最新的研究,栗木花岗岩体形成于印支期,岩浆活动集中在210Ma±4Ma^222Ma±5Ma之间,并且在239.8Ma±4.3Ma可能存在印支早期的岩浆活动。LA-ICP-MS zircon U-Pb ages of granite in Paoshuiling of Limu indicate that the Paoshuiling granite was produced by Indosinian magmatism and probably formed in three stages of magmatic activities, which occurred at 210 Ma, 222 Ma and 239 Ma respectively. Combined with the latest research, the authors hold that Limu granite was formed in Indosinian period and the magmatic activities were concentrated between 210Ma±4Ma and 222Ma±5Ma. In addition, the age of 239.8Ma±4.3Ma might represent the early Indosinian magmatic activity.

关 键 词：栗木矿床 泡水岭岩体 LA-ICP-MS锆石U-PB年龄 印支期 广西 

分 类 号：P597.3[天文地球—地球化学]