摘要
本文对华南地区２３０Ｍａ以来的花岗岩同位素地质数据进行了统计，结果表明：总体上存在自西北向东南渐新趋势，并由一次趋势面分析得到佐证。依据ＮＥ向构造的分区统计，存在１６５～１３７Ｍａ和１１２～８０Ｍａ，两个阶段岩浆活动的峰值自西向东迁移，在１４０～１１０Ｍａ时期，岩浆活动的峰值随时间变化规律不明显，但与库拉板块的快速俯冲和东南沿海火山岩化学成分的交替变化相对应，从而依据华南岩浆活动时空特点，将该区古岩浆－构造史划为三个阶段。
Based on the analysis of isotopic geological data after 230 Ma in south china, as a whole there is a young tendency from northwest to southeast and it is proved by one trend surface analysis. There is from east to west migration of magma action peak value both stages 165~137 Ma and 112~80 Ma. Which is based on subzone statistic of NE structure. In the stage of 140~110 Ma, magma action peak value is coincident with the rapid subduction of Cora plateform and volcanic rocks chemical constitution change of southeast coastland,it changes unclearly with the time.From above all ,this area is divide into three ages by the characteristics of magma action.
出处
《华东地质学院学报》
1998年第2期116-122,共7页
Journal of East China Geological Institute
关键词
中生代
花岗岩
同位素地质年龄
岩浆-构造阶段
South China area
mesozoic era
granite isotopic age
magma structure period.
