摘要
本文从Sr Nd Pb、U Pb同位素及岩石化学、稀土元素地球化学方面讨论了燕辽地区中生代火山岩的年代学特点、成因及形成的构造环境。研究表明,本区中生代火山岩的形成时代主要为中侏罗世、晚侏罗世、早白垩世和晚白垩世4期;本区火山岩浆可划分为钙碱性岩浆系列和亚碱性岩浆系列,火山岩浆源于富集型地幔;构造环境属大陆裂陷盆地。
Based on the Sr-Nd-Pb and U-Pb isotopes, the petrochemistry and the rare earth element geochemistry, this paper discussed the chronological characteristics, the genesis and the tectonic environment of the Mesozoic volcanic rocks in the Yanshan-Liaoning region, northeastern China. There are mainly four periods of the volcanic eruption, i.e.,middle Jurassic,late Jurassic, early Cretaceous and late Cretaceous.The volcanic magmas, including calcium-alkali magmatic series and sub-alkali magmatic series, were derived from the enriched mantle. The tectonic environment of the volcanic eruption belongs to a continental taphrogenic basin.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2004年第2期112-117,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
