| 安徽铜陵地区中生代侵入岩成因及成矿意义 |
| |
| 引用本文： | 谢建成,杨晓勇,肖益林,杜建国,孙卫东.安徽铜陵地区中生代侵入岩成因及成矿意义[J].地质学报,2012,86(3):423-459. |
| |
| 作者姓名： | 谢建成 杨晓勇 肖益林 杜建国 孙卫东 |
| |
| 作者单位： | 中国科学技术大学地球和空间科学学院 |
| |
| 基金项目： | 中国科学院知识创新工程重大项目: “中国东南部中生代成矿地球动力学和找矿勘查示范（KZCX1-Y-15）” |
| |
| 摘 要： | 安徽铜陵矿集区是我国最著名的铜、金、铁产地之一,成矿与岩浆作用关系密切.本次对铜陵地区中生代侵入岩进行了系统的矿物学、岩石学和元素地球化学研究.结果表明:①本区岩浆岩主要为辉石(二长)闪长岩( SiO2≤55％)、石英(二长)闪长岩(SiO255％～65％)和花岗闪长岩(SiO2≥65％)三种岩石组合,其矿物成分主要为...
|
| 关 键 词： | 岩石组合 岩浆混合 太平洋板块俯冲 分离结晶 同化混染 铜陵矿集区 |
| 收稿时间： | 5/7/2009 12:00:00 AM |
| 修稿时间： | 2009/7/12 0:00:00 |
M Petrogenesis of the Mesozoic intrusive rocks from the Tongling region, Anhui Province,China, and their metallogenic significance |
| |
| XIE Jiancheng,YANG Xiaoyong,XIAO Yilin,DU Jianguo,SUN Weidong.M Petrogenesis of the Mesozoic intrusive rocks from the Tongling region, Anhui Province,China, and their metallogenic significance[J].Acta Geologica Sinica,2012,86(3):423-459. |
| |
| Authors: | XIE Jiancheng YANG Xiaoyong XIAO Yilin DU Jianguo SUN Weidong |
| |
| Institution: | School of Earth and Spce Sciences, University of Science and Techonology of China |
| |
| Abstract: | Tongling ore cluster region is one of the most important non-ferrous metal producers where the formation of Cu-Au deposits has close genetic relation to Mesozoic intrusions.Petrology,mineralogy and element geochemistry of these Mesozoic intrusive rocks in the Tongling region were investigated.These results show:①The intrusive rocks can be divided into three rock associations:pyroxene diorite with SiO2≤55%,quartz diorite with SiO2 55%~65%,and granodiorite associations with SiO2≥65%.Their mineral components are mainly with characteristics of andesine,orthoclase,Mg-biotite,and anthophyllite-aluminium anthophyllite series.②Pyroxene diorite association rocks are mainly with characteristics of shoshonite.They were most probably produced by fractional crystallization primarily derived from an enriched mantle which has the material contribution of ancient subducted ocean crust,and experienced assimilation of a little lower crustal material.③Quartz diorite and granodiorite association rocks are mainly composed of high potassic calc-alkaline.They were possibly resulted from the crustal assimilation and fractional crystallization(AFC).The mixing of mantle-derived and crust-derived magmas might have been the main mechanism throught which quartz diorite and granodiorite associaltion rocks were produced.4)The early Cretaceous period magmatic activity and related metallogenesis are closely related to the Pacific plate subduction. |
| |
| Keywords: | association rocks magma mixing subduction of Pacific plate fractional crystallization assimilation Tongling region |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
