浙江中生代火山构造

浙江省十余万平方公里面积中,三分之二为中生代(上侏罗世及白垩纪)陆相火山岩所被复。对此广大火山岩区开展区域火山构造研究有重要意义。但至今在火山岩区大都还是沿袭沉积岩覆盖区的工作方法,停留在火山活动期后线形构造的调查和分析。

RESEARCHES ON MESOZOIC VOLCANIC STRUCTURE IN ZHEJIANG PROVINCE

This paper deals with the problems pertaining to the methodology of regional volcanic structure,and put forward an approach to the methodology with the study of volcanic structural traces as starting point combined with regional geology,geophysical field and geochemical circumstances.Following such a way the author of this paper made researches on the general features and laws of the volcanic structure of continental facies,expounds the restrictive relationship between the regional horizontal stress field and point vertical stress field under the action of volcanic magma,and analysed the framework structure of volcanic basement.Besides,based upon some geological data of strontium isotope,this paper also disucsses the origin of volcanic substance and its relation with regional geotectonies.