广东茂名盆地油页岩成矿因素分析

茂名盆地是我国最著名的油页岩产地之一。沉积环境分析表明，油页岩主要形成于半深湖-深湖和湖沼相两种沉积环境。高棚岭断裂的持续活动和温暖而潮湿的亚热带-温带环境为油页岩层的形成提供了良好的外部条件；通过透射光-荧光干酪根显微组分鉴定分析，茂名油页岩以腐泥型为主，含有少量腐殖腐泥型；在油页岩中还可见大量水生生物化石，孢粉中除了一定数量的水生植物花粉和草本植物花粉外还有极少量旱生植物的孢粉，说明有机质来源十分丰富；由于温度和盐度的差异造成湖水分层，形成缺氧环境，从而为有机质有效保存提供良好的空间，经成岩作用形成油页岩。本文通过对以上因素分析，提出茂名盆地油页岩成因模式。

Analysis on Oil Shale Forming Conditions in Maoming Basin of Guangdong Province

Maoming basin is one of the most famous oil-shale producing area in China.The analysis of sedimentary environments shows that the oil shale was formed in semi-deep to deep lacustrine and limnetic environments.Continuing activity of Gaopengling fault and warm moist semitropical ~ temperate environments are good condition to form oil shale;classification of the macerals of kerogen by transmitted light-fluorescence indicate that oil shale in Maoming consisted mostly of sapropel,and a few of humic-sapropelic;Th...