摘要
红安群天台山组解体为变质花岗岩、变质基性岩(墙)、变质火山岩三类岩石组合。锆石U-Pb定年结果:变质花岗岩形成时间为(813±10)Ma,属新元古代青白口纪岛弧花岗岩。变质火山岩形成时间为(739.1±6.4)Ma,属新元古代南华纪大陆裂谷火山岩。桐柏—大别地区广泛发育850～740 Ma岩浆事件表明,新元古代时期桐柏—大别山地区是扬子克拉通北缘组成部分。
Disintegration of Tiantaishan Formation of Hong’an group is rock association of metamorphic granite,metabasic volcanic rocks and metavolcanic rocks.Zircon U-Pb dating results show that metamorphic granite formed at（813 ± 10） Ma is Qingbaikouan period of Neoproterozoic island arc,metavolcanic rocks formed at 739.1 ± 6.4 Ma is Nanhua period of Neoproterozoic continental rift volcanic rock.Tongbo-Dabie Mountain area is the northern margin of Yangtze Craton.
出处
《资源环境与工程》
2013年第3期231-237,共7页
Resources Environment & Engineering
