刘立安;姜在兴;

• 1:中国地质大学能源学院

摘要(Abstract)：

基于前人研究成果,通过野外地质调查、室内分析测试对四川盆地古近系柳嘉组红层沉积物的性质、结构、原生沉积构造及石英颗粒表面结构进行了系统分析,分析结果进一步证明了本区古沙漠的存在。将其沙漠沉积分为沙丘和丘间两种沉积类型,对丘间又细分为干丘间和湿丘间,针对不同的沉积类型也明确了相应的识别标志。通过对沙丘前积层倾向的测量,重建得到当时的古风向为西-北西西风向,古新世时期该地区受盛行西风带控制,同时也受到古地理格局的影响,这一现象同时也可能表明了当时的副热带高压带要比现在更偏向低纬,古大气环流强度也要弱于现在。

关键词(KeyWords)： 四川盆地;柳嘉组;古近纪沙漠;沉积特征;古风向

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项(2009ZX05009-002);; 教育部“长江学者”与创新团队发展计划(IRT0864)

作者(Author): 刘立安;姜在兴;

Email:

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