浙东中、新生代玄武岩起源、演化与地幔交代作用

浙东中,新生代玄武岩在诸多方面存在相当明显的差异,由此追溯其源区特征与演化过程中地幔交代作用的影响,对于了解浙东、乃至整个中国东南大陆火山带深部背景和火山带由中生代向新生代的转变机制有着重要意义。

SOURCES AND EVOLUTIONS OF MESOZOIC AND CENOZOIC BASALTS IN EASTERN ZHEJIANG PROVINCE AND THEIR MANTLE METASOMATISMS

Cenozoic basalts are widespread in Southeast China Continent while Mesozoic ones are poorly outcropped. Researches on the latter are much weaker than that on the former. This paper deals with the sources and evolutions of the both from which many comparisons are made between them. The characteristic differences between Mesozoic and Cenozoic basalts were caused by different types of mantle metasomatisms in the depth which were due to the su'bduction of the Pacific Plate downward beneath the Eurasia Plate during Mesozoic and Cenozoic era. All of these are of great importance in studying the transitional mechanisms in the depth from Mesozoic to Cenozoic era in Southeast China Continent Volcanic Belt.