摘要
本区泥盆石炭纪深水相地层为深部裂陷成因。其深水相及浅水相岩相的分异始于中泥盆世（Ｄ２），终于中石炭世（Ｃ２），发展周期约为５０Ｍａ。扬子地块周边有许多裂谷与同源地体，其构造演化特征为短周期、近距离及面型造山带。表明华南大陆构造性质及演化不同于经典的造山带，至少从显生宙以来如此。华南地层与构造特征有其独特个性与特色，其根本原因在于深部独特的地幔流，即浅层的、次级的、多元的与可移动的地幔环流体系。
It is well known that the Deepwater sedimentation of Devonian & Carboniferous caused by micro-aulacogen in deep are deveoloped well in North Guangxi The sedimentary differentiation of deepwater & shallow water started from D 2 and ended to C 2 Its developing cycle was about 50Ma There are many rifts & homologous terranes around the Yangzi block They have experienced a short cycle & near-distance tectonic evolution The tectonic nature & evolution of south China are, at least in phanerozoic, different from those of classic orogenic belts in Europe The author assures that the unique geotectonism & evolution of south China may be resulted from unique mantle convection—the secondary, shallow level, multifactor& shifting mantle convection system
出处
《桂林工学院学报》
1997年第3期213-217,共5页
Journal of Guilin University of Technology
关键词
深水沉积
大陆地质
构造背景
地幔环流
deepwater sedimentation
continental geology
tectonic setting
mantle convection
