赣南—粤北晚中生代双峰式火山岩地质特征及其意义

The Geological Features and Significances of Late Mesozoic Bimodal Volcanic Rocks in South Jiangxi and North Guangdong

本文讨论了赣南—粤北晚中生代双峰式火山岩的地质时代、岩石组合、稀土元素及微量元素的特征,认为双峰式火山岩形成于板内环境,中基性火山岩和中酸性火山岩不是来源于同一个岩浆房,前者是由上地幔部分熔融形成的,后者是在前者诱发下地壳部分熔融而形成的。

The paper discusses the features of geological ages , rocks association sequence, REE elements and trace elements for the Meosoic bimodal volcanic rocks in South Jiangxi and North Guangdogn. The paper considers the Meosoic bimodal volcanic rocks form in intraplate environment . The mid-basic volcanic rocks and mid-acidic volcanic rocks do not come from the same magma chamber. The former proceeds from the upper melting mantle and the later the lower melting earth crust.