摘要
Spilite-keratophyreisakeymemberoftheShuangxiwuGroupvolcanicseriesinZhejiangProvince.PresentedinthispaperarethereliableSm-Ndinternalisochronage(1012±18Ma,∈Nd(T)=4.4±0.1)andwhole-rockRb-Srisochronage(972±40Ma,Isr=0.70327±8)obtainedforthefirsttimebytheauthors.FromtheavailableNd,SrandOisotopedatainconjunctionwiththemajorandtraceelementsdataitissuggestedthattheXiqiuspilite-keratophyreistheproductofisland-arcvolcanismduringthelateMiddleProterozoic.
出版日期
1993年01月11日(中国Betway体育网页登陆平台首次上网日期,不代表论文的发表时间)