民和盆地炭山岭油页岩特征及成矿控制因素分析

Analysis on the Characteristics of the Oil Shale in the Tanshanling Area,Minhe Basin and their Mineralization Controlling Factors

利用炭山岭矿区钻井岩心和分析测试资料,对炭山岭矿区油页岩工业品质、有机质类型、有机质丰度和油页岩分布特征进行了研究,并对油页岩控制因素进行了分析,建立了炭山岭矿区油页岩成矿模式。研究结果表明:油四层形成于水进体系域发育时期,成因类型为湖泊沼泽相腐泥腐殖型油页岩,油页岩品质较好;油三层形成于高水位体系域发育时期,成因类型为浅湖相腐殖腐泥型油页岩。炭山岭矿区油页岩成矿主要受构造发育特征、沉积环境和古地貌特征等因素控制。

Based on drilling cores and analysis data, the industrial qualities, types of organic materials and distribution characteristics of the oil shale in the Tanshanling area are discussed. The metallogenic model of the oil shale has been set up based on analyzing controlling factors of the oil shale. Research indicates that the high quality oil shale of the fourth mumber developed in a transgression period and belong to sapropelic-humic type of oil shale of lacustrine-bog facies. The oil shale of the third mumber developed in highstand system tract, and its genetic type is of humosapropelic of shallow lacustrine facies. The development of the oil shale in the Tanshanling area was apparently controlled by the tectonic evolution, sedimentary environment and paleo-topograph of the area then.