再论贵州省大地构造特征(三)

Further discussion on the tectonic characteristics of Guizhou province(the Third)

贵州地区新元古代—早古生代的武陵、雪峰及加里东运动的裂陷离散、汇聚及碰撞造山的洋陆转换,呈现台地—斜坡—盆地沉积格局,岩浆活动较弱。通过研究认为:南华系—早古生代中期随着扬子陆块与华南古陆的汇聚,使黔北—黔东—黔南沉积建造在次级拉张裂陷构造形成了重要“内生外成”的成矿系统,造就了以锰、磷、重晶石、铅锌、汞、镍钼钒等为主的喷流沉积型大型—超大型矿床系列;早古生代末—晚古生代早期陆内造山作用形成大陆裂谷盆地,广泛的红土风化壳集中在黔中、黔东和黔北的泻湖海湾的弱酸—还原性沉积环境中,“移硅沉铁富铝”形成了大规模铝土矿。因此提出,新元古代—晚古生代中期是贵州省重要的外生成矿期,由此加强勘查工作和研究,以期达到新一轮找矿突破。

The Neoproterozoic Early Paleozoic in Guizhou province has experienced Wuling movement,Xuefeng movement and Caledonian movement,ocean land transition of rifting dispersion,convergence and collisional orogeny platform slope basin sedimentary pattern.During this period,magmatism was weak.Through comprehensive research,it is believed that:With the convergence of the Yangtze block and the South China ancient land in the middle of the Central South China early Paleozoic era,making the sedimentary formation of North,East and South of Guizhou,in the secondary tension rift structure,an important"theory of the upper mantle origin and exogenous mineralization"metallogenic system has been formed.A series of large-scale and superlarge deposits were formed,which are mainly composed of manganese,phosphorus,mercury,lead zinc,barite,nickel,vanadium and molybdenum.The continental rift basin was formed by intracontinental orogeny from the end of Early Paleozoic to the early stage of Late Paleozoic,with extensive lateritic weathering crust concentrated.In the weak acid reducing sedimentary environment of lagoon Bay in central,Eastern and Northern Guizhou,large-scale bauxite was formed by“Si migration,Fe moves down and Al enrichment”.Therefore,it is proposed that:Neoproterozoic late Paleozoic is an important exogenetic period in Guizhou province,hence,it needs to strengthen the exploration work and research,further to achieve a new round of prospecting breakthrough.