共查询到20条相似文献，搜索用时 125 毫秒
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中国典型煤的激光显微荧光特征及R—I—VRo相关模式图的建立 总被引：1，自引：0，他引：1
利用激光显微荧光探针、ＭＰＶ－Ⅲ显微光度计等方法系统地研究了我国典型煤的激光显微荧光特征,并运用二项参数（Ｉ４００、Ｒ）与澳大利亚同期煤进行了对比,结果发现我国煤的Ｉ４００普遍比澳大利亚同期煤高,据此,建立了我国煤的Ｒ－Ｉ－ＶＲｏ相关模式图,该图对于正常评价我国烃源岩成熟度具有重要意义。 相似文献
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在研究镜质组类型基础上，把富氢镜质组（荧光镜质体）作为有折扣的富氢显微组分（类脂组）对待，提出了利用荧光显微组分丰度－ＦＭＴ参数作为评价不同还原类型煤生烃，排烃的定量指标。煤岩学标志，有机地球化学参数和热模拟实验产烃率数据为ＦＭＴ值定量评价煤生烃排烃潜力的适用性和有效性提供了佐证。 相似文献
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简要地比较了ＣｌＦ３和ＢｒＦ５两种常规氟化法的优缺点。在此基础上介绍了激光氟化法（又称激光探针法）的主要构成和特点以及激光探针法的分析精度和分析不同矿物时的特点。激光探针法具有样品处理简单、用量少、速度快和可作原位分析等优点。激光探针法的使用为地幔氧同位素系统的研究勾画了一幅新的图景；在微区同位素分析、交换反应动力学等方面也展示了良好的应用前景 相似文献
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二溴羟基苯基荧光酮荧光光度法测定水中微量锰 总被引：1，自引：0，他引：1
用荧光光度法研究了二羟基苯基荧光酮（ＤＢＨＰＦ）－溴化十六烷基三甲铵（ＣＴＭＡＢ）－Ｍｎ＾２＋体系的最佳测定条件。在ＰＨ１０．０的ＮＨ３．Ｈ２Ｏ－ＮＨ４Ｃｌ介质垢检出限为０．３ｎｇ／ｍｌ，适用于江湖水中微量锰的测定。 相似文献
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介绍了扫描电镜能谱、透射电镜、二次离子质谱、激光微探针质谱、显微傅立叶红外光谱等几种微束分析技术的性能特点，系统地论述了其在有机岩石学在应用现状与进展，并较详细地阐述了利用上述技术研究塔里木盆地烃源岩显微组分的结果。 相似文献
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作者首次使用激光微区质谱技术分析了煤中有机显微组分，描述了其谱图特征，发现不同地区煤样和同一地区煤样的不同显微组分其激光微区质谱（LAMMS）特征不同，反映了它们化学成分和结构上的差异。作者还将激光微区质谱技术（LAMMS）与飞行时间二次离子质谱（TOFSIMS）技术的优缺点作了初步对比，认为TOFSIMS／LAMMS两种技术结合起来是煤的微区分析较好的选择。 相似文献
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南堡凹陷下第三系烃源岩显微组分组成与热演化 总被引：4，自引：0，他引：4
采用有机岩石学全岩光片镜鉴技术 ,系统研究了南堡凹陷下第三系烃源岩的显微组分组成、主要生烃组分及热演化。南堡凹陷烃源岩总体上具有以陆生高等植物生源的有机物质占优势 ,富含镜质组、贫惰性组的特点 ,孢子体、藻类体、壳屑体和矿物沥青基质为该区主要生烃组分。利用镜质组反射率 Ro 和富氢组分显微荧光的变化 ,讨论了南堡凹陷下第三系烃源岩有机质热演化的特征 ,初步提出了有机质热演化阶段的划分方案。 相似文献
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表征海相烃源岩有机质成熟度的若干重要指标的对比与研究 总被引：21，自引：1，他引：20
对目前表征海相烃源岩有机质成熟度的几个重要指标（镜质体反射率,沥青反射率,镜状体反射率、动物有机碎屑反射率及牙形刺色变指数等）进行了探讨与对比,并在总结它们各自优缺点的基础上,提出了选择海相烃源岩有机质成熟度评价指标的原则,进而提出牙形刺相对荧光强度（Ｉ５４６）是表征海相烃源岩有机质成熟度的良好指标,其具有较广泛的适用性。 相似文献
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The chemical composition of the organic matter in the principal macerals of high-volatile bituminous coals from the Gunnedah Basin, New South Wales (Rvmax of telocollinite between 0.6 and 1.1%) has been evaluated from polished section specimens using an electron microprobe technique. Highest proportions of carbon occur in the inertinite macerals, especially fusinite and secretinite (formerly resino-sclerotinite), as well as in sporinite; lowest proportions of carbon occur in the different macerals of the vitrinite group. Oxygen shows the reverse trend, being most abundant in vitrinite and least abundant in the inertinite components, whereas sulphur is lowest in the inertinites and highest in the liptinite (mainly sporinite) present. Evaluations of maceral composition, using the carbon content of telocollinite as a rank indicator, show that carbon is more abundant in both sporinite and semifusinite, relative to vitrinite, in low-rank high-volatile bituminous coals. The difference decreases with increasing rank, and the proportion of carbon in telocollinite becomes essentially the same as that in sporinite and semifusinite at carbon contents of about 89 and 91%, respectively. The carbon content of fusinite and secretinite, on the other hand, does not seem to vary appreciably with rank advance. No significant difference in composition occurs in the rank range studied between the three vitrinite varieties present, desmocollinite, telocollinite and a more highly reflecting telocollinite resembling pseudovitrinite. No evidence was found to indicate a higher hydrogen content, relative to telocollinite, for the vitrinite matrix of desmocollinite. 相似文献
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应用全岩有机岩石学分析方法,对库车坳陷北部山前带中生界三叠系和侏罗系烃源岩的显微组分、主要富氢组分、有机质类型及热演化程度进行了研究。结果表明：库车坳陷北部山前带侏罗系克孜勒努尔组烃源岩显微组分总含量最高,恰克马克组烃源岩最低。中生界烃源岩显微组分组成具有镜质组含量高、壳质组和惰性组相对发育、腐泥组贫乏的特征。不同层位具有一定差异性,克孜勒努尔组和塔里奇克组中镜质组含量较高,恰克马克组壳质组相对发育。孢子体、壳屑体、角质体和藻类体是其主要的富氢组分,恰克马克组富氢组分相对含量最高。烃源岩有机质类型以Ⅲ型和Ⅱ2型为主,有利于生气,镜质组反射率Ro为056%~187%,热演化程度处于成熟-高成熟阶段。克拉苏—依奇克里克构造带冲断前缘烃源岩显微组分总含量与热演化程度均相对较高,为烃源岩的最大成熟生烃中心。烃源岩高生烃潜力与高的壳质组含量和低的陆源有机质含量有关。 相似文献
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Omprakash S. Sarate 《Journal of the Geological Society of India》2010,76(4):361-368
A detailed study of maceral composition and vitrinite reflectance of the coal deposits from Marki-Jhari-Jamni area, situated in the northwestern extremity of Wardha valley coalfield, Yeotmal district, Maharashtra has been carried out with special reference to their depositional set up. These coals have two distinct types of maceral organization, one having significantly high distribution of the vitrinite group of macerals (35–41%) and the other containing the dominance of inertinite (26–49%). Liptinite maceral group is recorded between 14 and 24%, barring a few coal bands having liptinite maceral group as high as 33–37%. The vitrinite reflectivity ranges from 0.38–0.43%. Thus, they have attained sub-bituminous C rank. Mineral matter in these coals varies between 15 and 22%. The present study suggests that the basin primarily experienced cold climate having intermittent brackish water influx with alternating dry oxidizing spells. 相似文献
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Petrographic investigations of serial ply samples from five high- to medium-volatile bituminous coal seams from Australia (4) and Canada (1) reveal substantial in-seam variations in the reflectance and monochromatic microfluorescence intensities of the maceral subgroup telovitrinite. The variations consist of one case of reflectance enhancement and fluorescence suppression, and four cases of reflectance suppression and fluorescence enhancement. The single case of reflectance enhancement and fluorescence suppression is due to the oxidation of the vitrinite nuclei at the sequence boundary between the Bayswater and Upper Wynn seams in New South Wales. The four cases of reflectance suppression and fluorescence enhancement result from the syn- and epigenetic absorption by the vitrinite nuclei of hydrogen donated by, presumably, anaerobic bacteria-generated lipids. Two of the coals are marine-influenced: the Liskeard Seam from the Bowen Basin by combined syngenetic and epigenetic effects, and the Greta Seam from the Sydney Basin mainly by epigenetic contact with sea water. For both coals, the results are strong vitrinite reflectance suppression and fluorescence enhancement. The remaining two coals, the Bulli Seam from the Sydney Basin and a coal seam from the Gates Formation in British Columbia, show moderate epigenetic effects on the optical properties of telovitrinite by fresh-water. In the Bulli Seam which was studied in two adjacent localities, the reflectance suppression and fluorescence enhancement of telovitrinite are stronger under sandstone roof than under shale roof. In some cases, the epigenetic effects are superimposed on syngenetic telovitrinite reflectance and fluorescence variations resulting from the cogeneration and mixing of different telovitrinite precursors, for example, autochthonous roots and hypautochthonous or allochthonous shoots. A measure of the degree of dispersal and mixing is the coefficient of variation of telovitrinite reflectance and/or fluorescence. This coefficient correlates well with detrital minerals and dispersed macerals, e.g., inertodetrinite and, to a lesser extent, sporinite. Some comments are made on slitted so-called pseudovitrinite which is regarded as a telovitrinite that was subjected to very weak post-coalification desiccation and possibly oxidation without losing much of its thermoplastic properties. 相似文献
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Omprakash S. Sarate 《Journal of the Geological Society of India》2010,76(5):361-368
A detailed study of maceral composition and vitrinite reflectance of the coal deposits from Marki-Jhari-Jamni area, situated
in the northwestern extremity of Wardha valley coalfield, Yeotmal district, Maharashtra has been carried out with special
reference to their depositional set up. These coals have two distinct types of maceral organization, one having significantly
high distribution of the vitrinite group of macerals (35–41%) and the other containing the dominance of inertinite (26–49%).
Liptinite maceral group is recorded between 14 and 24%, barring a few coal bands having liptinite maceral group as high as
33–37%. The vitrinite reflectivity ranges from 0.38–0.43%. Thus, they have attained sub-bituminous C rank. Mineral matter
in these coals varies between 15 and 22%. The present study suggests that the basin primarily experienced cold climate having
intermittent brackish water influx with alternating dry oxidizing spells. 相似文献
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通过分析显微图像的光学性质和测定煤的反射率等方法,研究了新疆中生代煤中半镜质组特征。结果表明:新疆中生代煤中含有一定量的半镜质组;均质半镜质体占总体(均质镜质体与均质半镜质体之和)的49%~64%,均质半镜质体的最大反射率(Rmax)比均质镜质体的高0.08%~0.13%;均质半镜质体的Rmax介于均质镜质体和结构镜质体之间,结构半镜质体的Rmax比结构镜质体的高0.28%~0.34%。由此可以得出:在三大组分划分方案中,应将均质半镜质体归入镜质组的均质体中,同时认为,按显微组分三大组分划分方案中,将结构半镜质体归入惰质组的半丝质体中更合理;在测定煤的反射率时,不能将均质半镜质体作为反射率的测定对象。本项研究结果对于指导本地区煤炭的炼焦配煤、煤炭液化和深加工利用等具有重要意义。 相似文献
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Macerals like sporinite, cutinite, suberinite and resinite of the liptinite group have been insufficiently recorded in Indian Permian Gondwana coals, until the fluorescence microscopy came into existence. With the introduction of this technique, macerals like bituminite, fluorinite and exsudatinite were convincingly recognized and alginite and liptodetrinite, normally mistaken for mineral matter under normal reflected light in routine coal petrographic analysis, were identified with certainty. Thus, fluorescence microscopy has added certain new macerals to the tally of the liptinite group and has increased their overall proportion in Indian Gondwana coals.In addition to the liptinite group, collodetrinite (=desmocollinite) and a certain fraction of collotelinite (=telocollinite) macerals of the vitrinite group were found to be fluorescing with dull reddish-brown to dark brown colours. Certain semifusinite and inertodetrinite macerals of inertinite group were also found to fluoresce with almost identical intensity and colour as that of the associated perhydrous (fluorescing) vitrinite. Contributions of degraded resinite, algal matter and bitumen in the formation of perhydrous vitrinite have been established. The fluorescence behaviour of inertinite appears to be related with its genesis from partial oxidation of resin/bitumen-impregnated cell walls. 相似文献