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我国云南省禄劝县境内的中泥盆世吉维特朗碎屑岩沉积地层中,赋存有世界上罕见的、独立存在的0.2～1.0m厚的透镜状角质煤。该煤与通常的煤不同,它宛如页页薄纸叠压成的煤块,可剥离成薄如蝉翼的片膜,褐黑色、半透明、弹性好、手感细腻、油脂光泽,易燃而且火焰中散发着浓郁的沥青气味。 角质煤,俗称叶状煤、纸煤。在原苏联的巴尔扎斯泥盆纪和莫斯科早石炭世等煤系地层中曾有发现,但均是富含角质体的腐泥混含煤。禄劝纸煤虽类似腐泥煤,其有机显微组分却是以高等植物的角质体为主,是典型的属于腐植煤范畴的角质残植煤。
In the Middle Devonian Geovittch clastic sedimentary strata in Luquan County, Yunnan Province, China, there are rare and independently existing hornblende of 0.2 ~ 1.0m in the world. The coal is different from the usual coal, it is like the stack of tissue paper into thin sheets of paper, peel into a film as thin as onion skin, brown, translucent, good elasticity, delicate touch, luster, flammable and The flame exudes a rich bitumen smell. Horny coal, commonly known as leaf coal, paper coal. In the former Soviet Union, the Balzers Devonian and Early Carboniferous in Moscow and other coal strata have been found, but are rich in horny body of sago mixed with coal. Although Lu Peng paper coal similar to sapropelic acid, its organic microstructure is based on the higher plants of the horny body is a typical belong to the field of rotting coal horny residual plantation coal.