| 豫西煤田新密矿区中间相碳沥青的发现及其地质意义 |
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| 引用本文： | 肖贤明,任德贻,毛鹤龄.豫西煤田新密矿区中间相碳沥青的发现及其地质意义[J].现代地质,1988,2(4):480. |
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| 作者姓名： | 肖贤明 任德贻 毛鹤龄 |
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| 作者单位： | 中国矿业大学北京研究生部
(肖贤明，任德贻)，中国矿业大学北京研究生部(毛鹤龄) |
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| 摘 要： | 新密矿区晚古生代含煤岩系热液方解石,石英晶洞中产出一种中间相碳沥青,由不同生长状态的中间相组成,包括5种光学结构:中间相基质、中间相小球体、中间相复合小球体、片状体及流动型。笔者认为这种碳沥青的原始物质来源于煤层本身,它与煤层中出现的各向异性体具有密切的戍因联系,是热变员作用时期煤中富氢壳质组排出的液态烃类（煤成油）运移出煤层,聚集于晶洞中逐步转变而成。由于中间相是一种过渡相态,作为一种特殊地质现象保存下来具有一定的地质意义。它的发现表明了地质时间的作用在有机质热成熟作用过程中是重要的,但是是有限的;同时亦证明了腐植煤只有一定产出液态烃类的能力,在其变质作用过程中,也存在烃类产出、运移与聚集的过程。
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| 关 键 词： | 晶洞 中间相碳沥青 中间相小球体 各向异性体 煤成油 煤化作用 |
THE DISCOYERY OF MESOPHASE CARBON PITCH IN XINMI COAL MINE Of WESTERN HENAN COALFIELD AND ITS GEOLOGICAL SIGNIFICANCE |
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| Xiao Xianming Ren Deyi Mao Helin.THE DISCOYERY OF MESOPHASE CARBON PITCH IN XINMI COAL MINE Of WESTERN HENAN COALFIELD AND ITS GEOLOGICAL SIGNIFICANCE[J].Geoscience——Journal of Graduate School,China University of Geosciences,1988,2(4):480. |
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| Authors: | Xiao Xianming Ren Deyi Mao Helin |
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| Abstract: | There is a type of mesophase carbon which occurs in the crystal cavities of calcite and quartz distributed in the Late Palaeozoic coal-bearing sequence of the Xinmi Coal Mine. It consists of mesophase with different growth stages, including five types of optical texture: mesophase matrix, mesophase small sphere,mesophase compound small sphere, flat and flow type. Electronprobemicroanalysis shows that the carbon pitch is rich in such elements as Al, Si, Cl, K, Ca Fe. The authors suggest that the primary matter which is changed into the carbon pitch may come from coal seams themselves, and that it has a close origin relationship with anisotropinite in coals, may be formed gradually by the liquid hydrocarbon (coal-enerating oil) drained from the hydrogenich exinite in coals when it moves off the coal seams and accumulates in crystal cavities. According to the experiment of measuring temperation and pressure for quartz crystal inclusion, the maximum temperature undergone by mesophase carbon pitch is about 260101 and the pressure is about 150 atm.
Since mesophase is a tranisition phase stage, it, persisted as a special geological phenomenon, may have some geological significance. Its discovery shows the effect of geological time on the organic matter maturation is very important, but limited. When an organic matter reaction arrives to equilibrium, to increase reative time has little effect on its maturation unless elevate its temperature furthermore. It is for this reason that the carbon pitch in this area was persisted under the temperature of about 260^ in the geological condition. The effect of geological time makes the temperature forming mesophase to reduce about 200 as compared with heat simulated test to pitch. The discovery of the carbon pitch verifies that humic coal has some potential abilities to generate liquid hydrocarbon, and that these processes, such as generation, movement and accumulation of the hydrocarbon occur during coalification |
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| Keywords: | : crystal cavity mesophase carbon pitch mesophase coal-gener-ating oil anisotropinite coalifification |
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