Variations in Fluorescence and the Reason of Different Type Vitrinites
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摘要: 对我国不同时代和地区125块煤样中镜质体荧光性进行了详细的荧光光度术分析，表明镜质组的荧光性不仅取决于煤阶，而且也与镜质体类型紧密相关。不同类型镜质体显示了不同的荧光强度，在石油窗阶段，富氢镜质体荧光强度明显高于正常镜质体，差值可达1-3倍，特别是富氢镜质体在0.5%-0.85% Rｏ阶段荧光强度一直较强，且荧光强度值的变化与煤阶没有较好的相关性，显示了明显的特殊性。镜质组相对荧光强度与超微类脂体含量、可溶有机质数量呈正相关关系。富氢镜质体较强的荧光性和Ｒｏ在0.50%-0.90%之间荧光强度特殊的演化规律与其中含有较丰富的超微类脂体以及富氢镜质体中流动相含量较高二方面因素有关。Abstract: Study of a series of 125 coal and source rock samples ranging in rank from the brown coal to lowvolatile bi tomono us coal in different regions and ages of China revealed that vitrinite fluorescence is con-trolled not only by rank, but also by vitrinite type. The fluorescence intensity of huminites dereases dras-tically to the Ro stage of 0. 40y 0. 5070,thereafter the secondary fluorescence of the orthohydrous vit-rinites begins to develop, fluorescence intensity of the orthohydrous vitrinite increases with coal rank,reaching the maximum at the Ro stage of 0. 85-1.0%.There is significant difference of fluorescenceproperties in different types of vitrinites in the stage of oil window,the fluorescence intensity of the per-hydrous vitrinite is obviously higher than that of the orthohydrous vitrinite. The fluorescence intensity ofthe pethydrous vitrinite remains relatively high in the Ro stage of 0. 40%一0. 85%,independent of coalrank. There is no minimum of fluorescence intensity at the stage about 0.45% R for the perhydrous vit-rinite,which is different from the orthohydrous vitrinite. The peculiar fluorescence properties of the per-hydrous vitrinite were interpreted by relatively abundant submicroliptinites and high amounts of mobilephase in vitrinites according to the positive correlation omong fluorescence intensity of vitriites,amounts of suhmicroliptinite in vitrinites and chloroform extracted yields.
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[1] 1 Powell T G Boreham C J Smyth M Hussel N and Cook A GPetroleum source rock assessment in nonmarinesequences py一rolysis and petrographic analysis of Australian coals and car-bonaceous shales. Org.Geochem.1991.17 375-394
2 王飞宇.傅家漠.刘德汉t煤和陆源有机质烃源岩特点和有机组分分类.科学通报.1993, 38(23): 2164-2168.
3 Ottenjnn, K, W olf, M and W olff-f'ischer, E. Das fFuoreszen-zcerhaltenderVitrinitezur Kennzeichnung der Kokurseigen-schaften von Steinkohlen Gluckauf-Forschungshefte, 198143 173-179.
4 Randk e. M .R G Schaefer, D Leythaeuser and M TeichmullerComposition of soluble organic matters in coals relation torank and liptinitefluorescence.Geochim, et Cosmochim. Acts.1980.144 1787-1800.
5 Wolf M,Wolff-Fischer E.Ottenjann K and Haegmann H WFuorescence proerties of vitrinites. Prepr, Meet, 36th ICCP,Commission 3. Oviedo, Spain, 1983.
6 Hagemann. H W·and A Hollerbach. Organic geochemical andpetrological investigations into a series of coals with increasingrank Proceeclings der lnternationalen Kohlenwis-senschaftlichen Tagung 1981 in Dasseleorf, Lssen V erlanGluckauf 1981, 80-85.
7 赵师庆工吃宇.等变质煤中镜质组的煤岩学研究.中国石炭二叠纪含煤地层及地质学术会议论文集.北京:科学出版社.1987, 366-374.
8 赵师庆工吃宇.董名山.论“沉煤环境戒煤类型媒质特征”概略成因模式I环境和煤相沉积学报.1994, 12(1): 32-38赵师庆王飞宇.刘德汉等.不同煤相中煤中镜质组特征的初步研究.中国科学院有机地球化学开放研究实验室研究年报(1987).北京:科学出版社.1988.23-44.
10 王飞宇傅家漠.刘德汉.光变可作为评价镜质体类型的新方法.石油实验地质.1995, 17(4): 384-393.
11 L in R and Davis, A Bensley, D f and Derbyshire, f ,J. Vitri-rote secondary fluorcscencz, its chemistry and relation to thedevelopment of a mobile phase and thermoplasticity in coal.Jour of Coal Gology, 1986, 6 215-228.
12 王飞宇傅家漠.刘德汉.煤和烃源岩镜质体中超微类脂体检出及意义.科学通报.1993, 38(2): 151-154.
13 Derbyshire F ,J. Molecular Structure of Coals Adebate, fuel,1989. 68 1091-1106.
14 赵师庆工吃宇.不同煤相镜质组的核磁共振研究.第四届有机地球化学论文集武汉:中国地质人学出版社.1990.185-190 -
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