摘要
浙江中生代晚期火山岩极为发育,而有无中生代早期火山岩,则向无定论。本文在确认浙东南松阳毛弄煤矿一带煤系沉积下部火山岩属中生界毛弄组的基础上,测得其SHRIMP锆石U-Pb年龄为180±4Ma,首次证明浙江存在早—中侏罗世火山岩,同时表明浙东南尚没有确切的中侏罗世晚期至晚侏罗世火山岩活动记录,而且也缺失晚侏罗世和大部分中侏罗世地层。
Late Mesozoic volcanic rocks are vastly developed in Zhejiang Province, southeastern China. But the early Mesozoic ones, however, are rarely or never reported and have no predicative opinion on whether they exist. Our recent investigation confirms the volcanic rocks occur under the coal bearing strata in the Maonong Coal Mine area of Songyang county, southeastern Zhejiang Province, belong to the Maonong Formation, which was generally regard as Middle Jurassic. And zircons from the volcanic rock yielding a SHRIMP U-Pb age of 180 ± 4Ma. Attest the existence of early Mesozoic volcanic rocks in Zhejiang Province. And suggest that there be no confessed Middle-Late Jurassic volcanic rocks as well as Upper Jurassic and most Middle Jurassic strata.
出处
《地质论评》
CAS
CSCD
北大核心
2007年第1期31-35,共5页
Geological Review
基金
中国地质调查局基础地质综合研究项目(编号1212010510705)的成果
关键词
SHRIMP测年
火山岩
毛弄组
早侏罗世
浙东南
SHRIMP zircon age
volcanic rock
the Maonong Formation
Early Jurassic
southeastern Zhe-jiang
作者简介
陈荣，男，1970年生，博士，副研究员，岩石学专业。Email：njcrong@cgs．gov．cn。
