三叠纪全球板块再造及岩相古地理研究  

RESEARCH ON GLOBAL PALEO-PLATE RECONSTUCTION AND LITHOFACIES PALAEOGEOGRAPHY IN TRIASSIC

作　　者：塔斯肯 李江海[1,2] 李维波[1,2] 王洪浩[1,2] 杨静懿[1,2] 李文山[1,2] 

机构地区：[1]造山带与地壳演化教育部重点实验室、北京大学地球与空间科学学院,北京100871 [2]北京大学石油与天然气研究中心,北京100871

出　　处：《海洋地质与第四纪地质》2014年第5期153-162,共10页Marine Geology & Quaternary Geology

基　　金：国家重点基础研究发展规划项目(2009CB219302)

摘　　要：三叠纪全球古板块再造及岩相古地理的研究对分析该时期烃源岩全球分布特征及形成环境具有重要意义。利用古地磁软件恢复三叠纪全球古板块再造图,并在此基础上结合全球盆地分析和理论框架,叠加更新各种地质要素,最终编制完成三叠纪全球古地理图、全球岩相及烃源岩分布图。早三叠世发生泛大陆持续汇聚事件,导致在全球范围内火山频繁活动、冰川消融及弧后盆地的广泛发育;由于格陵兰和波罗的之间的多个热点,以及中大西洋大火山岩省的岩浆作用,导致中—晚三叠世泛大陆开始裂解,全球海平面上升,大陆周缘广泛发育陆表海,提供了利于生烃母质生物繁衍生息的环境,继而促进了烃源岩的形成。三叠纪的烃源岩仅占全显生宙时期的1.2%,干酪根类型分布较为均一。Global Triassic paleo-plate tectonics and lithofacies palaeogeographic play a significant role in the study of global source rocks and depositional environment. With the paleomagnetic software and based on the data from global basin analysis, Triassic paleo-plate maps, including global palaeogeographie, global lithofacies and hydrocarbon source rock maps, have been compiled under the consideration of various geo- logical factors. During the Early Triassic, the continued gathering of the Pangea led to frequent volcanic activities. Glaciers were melting and back-arc basins developing globally. In the middle-late Triassic, as the results of magmatism of hot spots between the Greenland and Blatic, and the activity of large igneous provinces in Central Atlantic, the Pangea was breaking up, global sea level getting high and epicontinental seas developed in continental margins, that provided an environment favorable to the reproduction of hy drocarbon generating biota, which in turn promoted the formation of hydrocarbon source rocks. The Tri- assic source rocks account for only 1.2 % of the Phanerozoie source rocks and the kerogen types of the Tri- assic source rocks are relatively uniform.

关 键 词：板块构造 古地理 古岩相 烃源岩 三叠纪 

分 类 号：P736.1[天文地球—海洋地质]