海南岛古生代弧状构造带的特征及其地质意义

海南岛古生代弧状构造带发育于EW向九所-陵水构造带以北的广大地区,席卷中元古界至晚古生界,生成于海西期,并持续至印支期,控制了同期的岩浆作用、成矿作用和沉积盆地西浅东深的古地理格局。通过对该弧状构造带的构造特征、构造演化及动力学背景进行的探讨,研究认为,其生成可能与古特提斯收缩闭合有关,并呈现出由西向东的剪式闭合特征。而弧状构造带的厘定将为海南岛基础地质的研究以及地质找矿工作带来新的启发。

Characteristics of arc structure zones in the paleozoic era of Hainan island,and its geological implications

Arc structure zones in the Paleozoic era of Hainan Island originated in vast areas north to northeast trending Jiusuo-Linshui Structure Belt,widespread distributing in the Middle Proterozoic Suberathem to the late Paleozoic Suberathem.It originated in Hercynian Period,and continuously developed in Indosinian Period,which controlled the homochronous magmatism,the mineralization and the ancient geography construction of the sedimentary basin,shallow in west and deep in east.Its formation may be related to the close of the ancient Tethys,and shows the shear convergence characteristics from west to east.The reformulating of the arc shape structure belt will bring new inspiration for the Hainan Island's basic geology research as well as the geological prospecting work.