| 陕西南秦岭柞水岩体锆石U——Pb 年龄、岩石地球化学特征及其地质意义 |
| |
| 引用本文： | 刘哲东,孙丰月,马芳芳,张本龙.陕西南秦岭柞水岩体锆石U——Pb 年龄、岩石地球化学特征及其地质意义[J].世界地质,2013,32(2):236-243. |
| |
| 作者姓名： | 刘哲东 孙丰月 马芳芳 张本龙 |
| |
| 作者单位： | 1. 吉林大学地球科学学院，长春130061; 2. 天津矿业权交易所，天津300201 |
| |
| 基金项目： | 全国危机矿山接替资源找矿项目 |
| |
| 摘 要： | 锆石U --Pb 定年; 柞水花岗岩; 南秦岭
|
| 关 键 词： | 锆石U-Pb定年 柞水花岗岩 南秦岭 |
Zircon U-Pb ages and petrochemical characteristics of Zhashui granitic plutons in South Qinling Orogen of Shaanxi and their geological significance |
| |
| LIU Zhe-dong
,
SUN Feng-yue
,
MA Fang-fang
,
ZHANG Ben-long.Zircon U-Pb ages and petrochemical characteristics of Zhashui granitic plutons in South Qinling Orogen of Shaanxi and their geological significance[J].World Geology,2013,32(2):236-243. |
| |
| Authors: | LIU Zhe-dong SUN Feng-yue MA Fang-fang ZHANG Ben-long |
| |
| Abstract: | The zircon LA-ICP-MS U--Pb dating on Zhashui granitic pluton is 203. 3 ± 1. 3 Ma，which demonstrates Late Triassic age． Quantitative analysis on the pluton indicates that it is the metalumious I-type granite of high-K calc-alkaline series in category． The chondrite-normalized REE patterns exhibit a gently right-dipping Vtype curve with a Eu negative anomaly． Primitive mantle-normalized trace element spidergram shows enrichment of LILE ( e. g. Rb，K) ，HFSE ( e. g. Zr，Hf) ，and a severe depletion in Ba，Sr，P，Ti and lightly depletion in Nb，Ta． Nb /La ranging from 0. 63 to 0. 97，with Nb /Ta from 7. 64 to 11. 64，which indicates the magma as mixture of mantle and lower crust． We conclued that the formation of Zhashui granitic pluton was mantle material flowing up and mixing with lower crust magma，related to lithospheric delamination occurred in late main orogenic stage of South Qinling Orogen． And in this period，the tectonic nature of lithosphere in South Qinling Orogen was characterized by transition from compression to extention． |
| |
| Keywords: | zircon U-Pb dating Zhashui granitic pluton South Qinling Orogen |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《世界地质》浏览原始摘要信息 |
| 点击此处可从《世界地质》下载免费的PDF全文 |
