| 胶东夏甸金矿成矿期闪长玢岩脉锆石U-Pb年代学研究 |
| |
| 引用本文： | 王硕,孙丰月,孙巍,奥琮,陈俊.胶东夏甸金矿成矿期闪长玢岩脉锆石U-Pb年代学研究[J].世界地质,2014,33(2):376-387. |
| |
| 作者姓名： | 王硕 孙丰月 孙巍 奥琮 陈俊 |
| |
| 作者单位： | 1. 吉林大学 地球科学学院，长春 130061; 2. 吉林大学 古生物学与地层学研究中心，长春 130026 |
| |
| 摘 要： | 山东夏甸金矿区内深源中—基性脉岩发育,其中以闪长玢岩与矿体间时空关系最为密切,被认为是幔源流体成矿最重要的判别标志。笔者通过对夏甸金矿两个不同中段内成矿期闪长玢岩LA-ICP-MS锆石U-Pb年代学研究,获得了4组较为一致的年龄,它们较为完整地保留了这一期中—基性岩浆活动留下的地质记录。这4组年龄分别为:①五台期:华北地区微陆块拼合,发生大规模岩浆作用,形成华北克拉通基底雏形;②印支期:华南与华北两大板块碰撞拼合,苏鲁—大别造山带出现,区内发生大规模变质作用;③燕山早期:受太平洋板块俯冲影响,太古宙绿岩体发生强烈改造,形成大面积重熔型花岗岩;④燕山晚期:成岩成矿期。
|
| 关 键 词： | 夏甸 闪长玢岩 锆石 U--Pb 年龄 地质记录 |
Zircon U--Pb age for dioritic porphyrite of Xiadian gold ore-deposit in Jiaodong region |
| |
| WANG Shuo,SUN Feng-Yue,SUN Wei,AO Cong,CHEN Jun.Zircon U--Pb age for dioritic porphyrite of Xiadian gold ore-deposit in Jiaodong region[J].World Geology,2014,33(2):376-387. |
| |
| Authors: | WANG Shuo SUN Feng-Yue SUN Wei AO Cong CHEN Jun |
| |
| Institution: | 1. College of Earth Sciences，Jilin University，Changchun 130061，China; 2. Ｒesearch Center of Paleontology and Stratigraphy，Jilin University，Changchun 130026，China |
| |
| Abstract: | Intermediate-basic dikes in Xiadian gold field，particularly its diorite-porphyrite，showed close re- lationship to gold mineralization which has been regarded as the indicator for the mantle-derived fluid mineraliza- tion． LA-ICP-MS zircon U-Pb dating result from two ore-forming period diorte-porphyrite in different depths showed four groups of concordia age． They are records of the geological processes formed by magma transport． The four groups can be recognized as ① Wutai period － the NCC fundamentally amalgamated with large-scale thermal action． Initial ore source bed formed． ② Indosinian － the South China Craton subducted the North China Craton． Dabie- Sulu oregenic belt exposed and large scale metamorphization happened． ③ Early Yanshanian － the subduction of Pacific Plate leaded intensive modification of Archaean greenstone belt and its remelting formed granite． ④ Late Yanshanian － diagenesis and mineralization period． |
| |
| Keywords: | Xiadian diorite-porphyrite zircon U--Pb ages geological records |
| 本文献已被 CNKI 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 |
