广西水下沉积岩脉群特征及形成机理

FEATURES OF SUBMARINE SEDIMENTARY DIKE GROUPS IN GUANGXI AND ITS FORMING MECHANISM

水下沉积岩脉群是一种奇特的地质现象,目前国内公开报导的文章并不多见。广西水下沉积岩脉最早六十年代发现于凌云县下甲一带,近年来,随着1:5万区调工作的深入开展,广西桂林、南丹、乐业、平果等地又相继发现一批岩脉群。它的发现,为深入研究广西古板块和古构造演化具重要意义。

Mang submarine sedimentary dike groups were discovered in carbonate platforms of Guilin,Nandan,Lingyun,Leye,etc.in Guangxi.These dikes were formed in the Early Permian and Early Triassic and in the Medium to Upper Devonian and Upper Carboniferous strata.They consist of breccia limestones and limestones,The formation of these dikes is closely associated with the splitting of the platform in the Late Palaeozoic.These groups provide information for studying palaeostructural environmemt.