沉积与特提斯地质2012，Vol.32Issue(2)：23-30,8.
滇西云龙地区下白垩统南新组岩相分析及意义
Sedimentary facies in the Lower Cretaceous Nanxin Formation in the Yunlong region, western Yunnan
摘要
Abstract
A cross section across the Lower Cretaceous Nanxin Formation was measured in the Yunlong region, western Yunnan. In the light of lithology, sedimentary structures and sectional architectures, the sedimentary facies in the Nanxin Formation mostly consist, from the base upwards, of the meandering stream and lake facies interbedded or intercalated with thin palaeosol facies. More precisely, the meandering stream facies may be subdivided into the channel, point bar, overbank and natural levee subfacies; the lake facies may be subdivided into the littoral lake, shallow lake and bathyal lake subfacies, and the palaeosol facies may be classified as two types of the calcareous soil and gley soil. The sedimentary facies sequences and associations indicate the variations in regional tectonics from relative active to stable tectonics, and the subtropic semi-arid to arid palaeoclimates during the deposition of the Lower Cretaceous Nanxin Formation.关键词
岩相/古气候/南新组/下白垩统/云龙/云南Key words
sedimentary facies/ palaeoclimate/ Nanxin Formation/ Lower Cretaceous/ Yunlong/ Yunnan分类
天文与地球科学引用本文复制引用
孙勇,李祥辉,周勇..滇西云龙地区下白垩统南新组岩相分析及意义[J].沉积与特提斯地质,2012,32(2):23-30,8.基金项目
国家重大基础研究发展规划项目(973),课题"中国白垩纪重要时期的古气候重建"(2006CB701401) （973）
