摘要
陇川盆地为北东－南西向的断陷盆地。对盆地钻井岩心和地表露头剖面的沉积旋回、岩矿标志、孢粉组合及测井资料的研究，将盆地地层分为五个层序；层序１及２为芒棒组，层序３、４、５为南林组。南林组地质时代为中新世，芒棒组地质时代为上新世。孢粉组合反映出盆地古气候为热带－亚热带背景下的时凉时干的特点。
The Longchuan oil-and gas-containing basin is a NE-SW-trending fault basin. Onthe basis of sedimentary cycles and environments,clay mineral analysis,sporopollen assemblages and log data of drill cores and outcrops,five sequences have been distinguished forthe basin,that is,Sequences Ⅰ,Ⅱ,Ⅲ ，ⅣandⅤ,of which SequencesⅠand Ⅱ are assigned to the Mangbang Formation,and Sequences Ⅲ,Ⅳ andⅤ to the Nanlin Formation,respectively. The latter formation is of Miocene age,while the former one is of Pliocene agewith the aid of age determination by using electron spin resonance spectroscopy andsporopollen analysis.
关键词
陇川含油气盆地
地层层序
地质时代
孢粉组合
上第三系
Longchuan oil-and gas-containing basin
stratigraphic sequence
geologicalage
sporopollen assemblage
Neogene
