西藏羌塘盆地光明湖地区早白垩世化石的发现及意义

Early Cretaceous fossil found in Guangming Lake area of Tibet Qiangtang Basin

西藏羌塘盆地以发育中生代海相地层为特征,成为近年来油气勘探的重要区块。对于整个盆地的中生代海相沉积是否跨入早白垩世过去仍存在一些争议。本次在光明湖一带的白龙冰河组上部采集到大量早白垩世化石,证实了该组沉积晚期已跨入早白垩世,为区域上与该组同时异相的其它中生代地层沉积时代的进一步厘定提供了新的化石依据。对整个羌塘盆地晚侏罗世—早白垩世沉积古地理的研究,以及羌塘盆地早白垩世海相地层的圈定和油气地质条件的探讨具有重要意义。

Mesozoic marine strata in Qiangtang cent year. But here＇s the Mesozoic strata may have that. Recent, the author collected a large number Basin are an important goal of oil and gas exploration in recrossed into the Early Cretaceous, almost no one reported of early Cretaceous fossils at the upper of Bailong glacier group in Guangming lake area. This proves that the region＇s Late Jurassic strata have entered the Early Creta- ceous. At the same time, that provides a new fossil basis for the Mesozoic sedimentary era redrawn in the area.