Origin, Feature and Its Significance to the Petroleum Exploration of the Clay-size Plagioclase in Lacustrine Laminated Argillaceous Dolomite, Qingxi Depression in Jiuxi Basin

• 酒西盆地青西坳陷湖相纹层状泥质白云岩中泥级斜长石成因、特征与油气勘探意义