伊宁盆地古近系底界与下伏地层接触关系分析  

Analysis on the contact relationship between the Paleogene base and its underlying strata in Yining basin

作　　者：高志军 焦叶红 范士彦 张心彬 

机构地区：[1]山东省煤田地质规划勘察研究院,山东省泰安市271000 [2]山东省煤田地质局,山东省泰安市271000

出　　处：《中国煤炭》2012年第5期40-43,共4页China Coal

摘　　要：新疆伊宁盆地古近系底部普遍发育一套姜黄色砾岩层,其底部存在的不整合面反映了伊宁盆地自中侏罗世末期至新生代初期的长期沉积间断。古近系广泛超覆于下伏中生代不同时代地层之上,总体表现出自盆中向南北盆缘、沿盆缘自中部向东西两侧其超覆层位逐渐偏低的接触规律,在地质研究、勘查工作实践中发现,姜黄色底砾岩及其底部的不整合面、古风化壳及其组合均可作为良好的地质标志层。A set of ginger conglomerate layer is generally developed at the bottom of Paleogene in Yining basin of Xinjiang. The unconformity exists in its bottom indicates a long-term depositional hiatus between the late middle Jurassic to early Cenozoic in Yining basin. The Paleogene widely overlaps on the underlying Mesozoic strata, which reflects the contact regularity of the overlapping layers height getting low from the center to the southern and northern edges of the basin, from the center to the eastern and western sides. The ginger basal conglomerate, the unconformity, the paleo-weathering crust and their composition can be taken as good mark formations for geological study and exploration work.

关 键 词：古近系底砾岩 不整合面 接触关系 找煤方向 伊宁盆地 

分 类 号：P618.11[天文地球—矿床学]