燕山地区冀北坳陷元古界下马岭组沥青砂岩岩石学特征和沉积环境*
朱毅秀1,2, 杨程宇1,2, 王欢1,2, 肖劲光1,2

Petrologic characteristics and sedimentary environments of bituminous sandstone in the Proterozoic Xiamaling Formation of Jibei Depression, Yanshan region
Zhu Yi-Xiu1,2, Yang Cheng-Yu1,2, Wang Huan1,2, Xiao Jin-Guang1,2
冀北坳陷下马岭组沥青砂岩显微照片 a,b—含沥青石英砂岩,石英次生加大与恢复自形,沥青含量6%,其中a为单偏光,b为正交光;c—沥青砂,岩石疏松,单偏光;d—石英砂岩,硅质镶嵌状胶结,单偏光;e—粒间沥青,SEM;f—粒表黏士矿物(有序伊蒙混层)与粒间硅质胶结物,SEM