岩矿测试Issue(4)：494-502,9.DOI:10.15898/j.cnki.11-2131/td.2015.04.019
赣东北朱溪铜钨矿区花岗闪长斑岩 LA-ICP-MS锆石 U-Pb定年及地质意义
LA-ICP-MS Zircon U-Pb Dating of Granodioritic Porphyry Located Zhuxi Copper-Tungsten Mine in Northeast Jiangxi and Its Geological Significance
摘要
Abstract
The Zhuxi ultra-large type copper-tungsten deposit in the Hortheast Jiangxi province located in Taqian -Fuchun metallogenic belt which belongs to Jiangnan ancient island-arc,the discovery of the deposit has verified Southern Tungsten Horth Expansion perspective and challenge the viewpoint that Tungsten located in the south but the copper located in the north of Jiangxi provience,but the previous lack of accurate chronology study related to Zhuxi copper-tungsten mineralization of granite not enough, resulting in the geodynamic background of understanding. In this study,on the basis of detailed field investigation,core logging and petrology studies on the granodioritic porphyries which had intruded into the Middle Proterozoic Shuangqiaoshan group and with copper mineralization alteration,using laser ablation inductively coupled plasma mass spectrometry( LA-ICP-MS)zircon U-Pb dating,we obtained the granodioritic porphyries zircon 206 Pb/ 238 U weighted mean age of 847. 2 ± 9. 4 Ma (MSWD=0. 111),which can represent the granodiorite porphyry magma emplacement and crystallization age, belonging to the neoproterozoic. The results reveal that the granodioritic porphyries of Zhuxi copper-tungsten mine is a product of the early Heoproterozoic Southern China ancient oceanic crust subduction and Yangtze and Cathaysian continental blocks collisional magmatism,the magmatic activity provides the basis for the metallogenic Qinzhou-Hangzhou metallogenic belt,and the magma event is close related to the Taqian-Fuchun ore belt mineralization,it also provides new evidence for the study of Zhuxi ultra-large type copper-tungsten deposit.关键词
朱溪铜钨矿/花岗闪长斑岩/铜矿化/激光剥蚀电感耦合等离子体质谱法/锆石U-Pb定年Key words
Zhuxi copper-tungsten mine/granodiorite porphyry/copper mineralization/Laser Ablation Inductively Coupled Plasma-Mass Spectrometry/zircon U-Pb dating分类
天文与地球科学引用本文复制引用
万浩章,刘小林,刘战庆,刘善宝,陈毓川,王成辉,陈国华,梁力杰,李赛赛,张树德..赣东北朱溪铜钨矿区花岗闪长斑岩 LA-ICP-MS锆石 U-Pb定年及地质意义[J].岩矿测试,2015,(4):494-502,9.基金项目
江西省国土资源厅地质勘查基金项目（矿［2012］01-06）；中央地质勘查基金项目（2013360010）；国土资源部公益性行业科研专项（201411035）；桂林理工大学博士科研启动基金项目 （）
