黔东北伊迪卡拉(震旦)纪陡山沱期的古地理环境  

Paleographic Environment of Doushantuo Period of Ediacaran(Sinian) in Northeast Guizhou

作　　者：李玉兰[1] 尹海鉴[1] 王约[1] 毛铁[1] 

机构地区：[1]贵州大学资源与环境学院,贵州贵阳550003

出　　处：《贵州地质》2012年第4期295-300,共6页Guizhou Geology

基　　金：贵州省省长基金;国家自然科学基金(No.41162003);贵州省科学技术基金(J-2010-2030)联合资助

摘　　要：南沱冰期后的伊迪卡拉纪陡山沱期,全球海平面逐渐上升,宏体生物群(包括蓝田生物群、瓮会生物和庙河生物群等)广泛出现在扬子地区,使扬子地区陡山沱期的古地理研究成为目前研究的热点之一。在黔东北江口—铜仁地区的陡山沱组中产有丰富的宏体生物("瓮会生物群")和圆柱状叠层石,同时通过对遵义—铜仁陡山沱组多剖面岩性及岩性组合特征的分析和研究,认为在江口德旺地区可能存在有隆起的大陆边缘,其东侧为大陆边缘前缓斜坡相,西侧为半封闭台地相。In Doushantuo period of Ediaearan after Nantuo ice age, the global sea level raised gradually, macrofossil biota appeared widely in Yangtze area, the paleogeography study of Doushantuo period in Yangtze area becomes the present hot spot. Abundant maerofossil and cylindrical stromatolite are found in Doushantuo formation of Jiangkou - Tongren area of north Guizhou, meantime, by analysis and study the muti - sections li- thology and lithology association in Doushantuo period of Zunyi -Tongren, it＇s thought that uplift continental margins maybe exist in Dewang area of Jiangkou, its east is continental gentle -slope facies and west is semi -isolated platform facies.

关 键 词：宏体生物 叠层石 古地理 伊迪卡拉纪陡山沱期 黔东北 

分 类 号：P534.31[天文地球—古生物学与地层学] P531[天文地球—地质学]