Re-Understanding of the Geological and Geochemical Characteristics of the Mesozoic Intrusive Rocks from Tongling Area of Anhui Province, and Discussions on Their Genesis
详细信息
- 责任者：Xu Xiaochun (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Bai Ruyu
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(10)
- 关键词：闪长岩 ; diorites ; 同位素地球化学 ; isotope geochemistry ; 安徽 ; Anhui Province
- 页码：p.3139-3169
- 图表：illus., 3 tables, 186 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Based on widespred collection for the previous research data and deep comprehension on the predecessors’ achievements,and careful observation of petrography and systematic investigation of petrology,petrochemistry,trace element as well as isotope geochemistry,the geological and geochemical characteristics of the Mesozoic magmatic rocks in the Tongling area have been summarized, and the petrogenesis discussed. The results are as follows: 1) the intrusive rocks show zonal distribution along with east-west deep faults and hypabyssal intrusive output,mainly controlled by multistage faults in different directions and propertiesl 2) according to Q-A-P diagram,the intrusive rocks can be divided into pyroxene diorite,quartz diorite and granodiorite,and all of the three kinds of intermediate-acid dioritic rocks are belong to high potassic calc-alkaline seriesl 3) the similar geochemical characteristics of trace elements,rare earth elements and Pb-Sr-Nd-O isotope for the three kinds of intrusive rocks indicate that the magma was originated from an enriched lithospheric mantle and assimilated by the crustal materials; 4) the magma was likely derived from different layers of the magma chamber which were zonally distributed in the lower crust and randomly ascended,intruded in pulse,connecting with deep faults induced by tectonic movements; and 5) the geotectonic background of the Mesozoic regional magmatic activities of Tongling area maybe inside of the continental plate.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |