广西及邻区地台盖层和中新生代盆地地层褶皱过程

根据新测构造地质剖面资料，指出印支运动导致地台盖层和右江盆地构造层全面褶皱的主张是一大误解。印支运动的褶皱作用十分轻微，向北西减弱，至滇东南—黔南消失。地台盖层和上覆中新生代地层的同步—类同步褶皱是由多期次继承性造山运动累积叠加形成的。依据褶皱时代和过程以及优选大地构造线取向的差异，广西及邻区可分成以北西向大地构造线占优势的滨特提斯区，包括桂西和滇东南—黔南两亚区，和以北东向优选大地构造线为特点的滨太平洋区。主要褶皱时代在滨特提斯区是中晚始新世之交，在滨太平洋区是晚侏罗—晚始新世。滇东南—黔南无印支褶皱。

FOLDING PROCESS OF THE PLATFORM COVER AND MESO-CEMOZOIC BASINAL STRUCTURAL STAGES IN GUANGXI AND ADJACENT REGIONS

It is pointed out that the idea of the overall folding of the platform cover and the Youjiang basinal structural stage caused by the Indosinian movement is a great misunderstanding according to data of structural geological sections surveyed lately by the writer. The folding of the Indosinian movement was quite weak and was weakened northwestwards, and disapeared to Southeast Yunnan-South Guizhou. The synchronous-parasynchronous folds of the platform cover and the overlying Meso-Cenozoic basinal stages were formed by the accumulation-overlap of polyphase inherited orogenies. According to the differences of folding process and optimized geotectonic line trending, Guangxi and adjacent regions can be divided into a Peri-Tethys region predominated by the northwest geotectonic lines including two subregions of West Guangxi and Southeast Yunnan-South Guizhou and a peri-Pacific region characterized by the northeast optimized geotectonic lines. The principal folding age was between the Middle and Late Eocene in the Peri-Tethys region and Late Jurassic-Late Eocene in the Peri-Pacific region. There are no Indosinides in the Southeast Yunnan-South Guizhou.