Bushveld-age magmatism in southeastern Botswana: evidence from
详细信息   rld.org/content/107/1-2/219.full">在线全文   rld.org/content/107/1-2/219.full.pdf">PDF全文下载
摘要

The Moshaneng Complex (southeastern Botswana) consists of a suite of coarse-to-medium-grained gabbros, medium-grained diorites, alkali feldspar-phyric syenites, fine-grained and porphyritic granites. Field studies indicate commingling and mixing of mafic and felsic magmas leading to the production of diorites. U-Pb isotopic analyses of single zircon and titanite grains from the Moshaneng Complex granites yield a crystallisation age of 2054 ± 2 Ma, indicating the Moshaneng Complex is coeval with the Bushveld Complex of South Africa. The Bushveld-age ultramafic, mafic and felsic igneous rocks of southern Africa define a ~2.06 to ~2.05 Ga large igneous province extending from South Africa into Botswana.

© 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