This Paper were systematically summary that the Late Paleozoic volcanic spatiotemporal distribution and geological characteristics,rocks chemistry characteristics of Yili basin in the West Tianshan,the Late Paleozoic volcanic basin mainly by Late Devonian to Early Permian volcanic composition,its formation with South Tianshan oceanic evolution relevant,Late Devonian-Early Carboniferous Dahalajunshan formation volcanic as Tianshan South ocean basin subduction formed calcium alkaline volcanic,Late Carboniferous Yishijilike formation volcanic rocks is composed under extrusion environment transite to extensional environmental,and was composed by calcium alkaline volcanic and alkaline volcanic. Early Permian Wulang formation volcanic compared postorogenic with rift characteristics bimodal volcanic combination.
© 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 |