作　　者： ; ; ;

机构地区： 中国科学院广州地球化学研究所边缘海地质重点实验室

出　　处： 《海洋地质与第四纪地质》 2007年第2期33-40,共8页

摘　　要： 琼州海峡的成因有海岸侵蚀说、构造断裂说和海侵低地说,海南岛与雷州半岛分离的时代有上新世、第四纪初、中更新世之前、中更新世之后或全新世等几种说法。分析了琼州海峡地质、海洋和区域古生物地理等新资料后认为,琼州海峡不是断裂谷,其前身是常态低地,是在全新世中期全球性海侵淹没峡区原来的常态低地而成的,主要形成时段为(10570±560)～(7125±96)aBP;推算自琼州海峡形成以来,中央深槽下切平均速度为0.7cm/a,西口外潮流三角洲堆积平均速率为0.17～0.31cm/a。 The origin of Qiongzhou Strait has 3 causes： coast erosion, tectonic riling and marine transgression. And the time for Hainan Island and Leizhou Peninsula to separate from each other also has some explanations： Pliocene, the beginning of Quaternary, before middle Pleistocene, after middle Pleistocene and Holocene. The latest data about the geology, oceanography and regional palaeo-biogeography of Qiongzhou Strait are analyzed in the paper, and it is thought that Qiongzhou Strait is not a rift. It grew out of a normal low land, and was formed in the middle Holocene, about （10 570±560）-（7 125±96） aBP, when marine transgressed the original normal low land. It is inferred that the average speed of central trough valley undercutting is 0.7 cm · a^-1, and the average speed of tidal current delta accumulation outside the west mouth is 0.17-0.31 cm · a^-1 after the Qiongzhou Strait formed.

关 键 词： 全新世中期海侵 琼州海峡 海南岛 雷州半岛

领　　域： [天文地球] [天文地球]