摘要
一般大地构造观点认为,下扬子区属于稳定的地台区,而华南区属于活动性大的造山带,二者基底性质存在差别,但通过1∶50万航磁资料统一编图,并结合对地质及其他物探资料的分析,认为二者前震旦系基底性质是相似的,应共同存在下元古界或更老的结晶基底。由此也为地质界一直争论的下扬子区是否存在"刚性"基底,"华夏古陆"是否存在等焦点问题给出答案,肯定了它们的存在。
Geotectonic researchers commonly hold that the Lower Yangtze area belongs to a stable craton while the South China area falls into an active orogen, whose basements are obviously different from each other. Based on an analysis of geological - geophysical data and the 1 ： 500 000 united compilation of aeromagnetic data, the authors made a comparison between the Pre-Sinian basements of these two areas and revealed that they have similar Lower Proterozoic crystalline basements. This study gives a solution to the controversy as to whether there exist Cathaysia and a rigid basement in Lower Yangtze area or not.
出处
《物探与化探》
CAS
CSCD
北大核心
2009年第5期493-496,共4页
Geophysical and Geochemical Exploration
关键词
磁场特征
基底性质
前震旦系
下扬子区
华南区
Lower Yangtze area
South China area
basement properties
magnetic field characteristics
Pre - Sinian
