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我国几个矿区叶蜡石X射线粉晶衍射研究 总被引：4，自引：0，他引：4
对我国几个主要类型叶蜡石矿的叶蜡石做了X射线粉晶衍射研究。从大量实验结果发现,所研究叶蜡石存在单斜晶系和三斜晶系两种多型。单斜晶系(2M);空间群G_(2h)~6-C2/c,a=5.175A,b=8.902A,c=18.673A,β=100.1°,Z=4;三斜晶系(1Tc):空间群P_c,a=5.162A,b=8.965A,c=9.346A,a=91.2°,β=99.96°,γ=89.91°,Z=2。 相似文献
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碳酸岩生油岩中沥青变质程度和沥青热变质实验 总被引：4，自引：0，他引：4
Natural asphalts from carbonate rocks in South China have been studied by using microscopy, X-ray diffraction, ESR and C^-, H^- analysis and subjeeted to thermal alteration experiments under 250℃/1000 atm--500℃/1000atm. It is shown that asphalt and vitriolic behave differently under conditions of thermal alteration. In compariseu with vitriuite, asphalt is of higher reflectivity, more apparemt anisotropy,lower values of d002 and H/C ratio above 350℃. The mierostructure and charaeter of protoasphalt disseminated in carbonate rocks and diagenetic asphalt reflect the thermal history and the maximum paleotemperature to which they haxt been subjected. Reflectivity, H/C ratio, d002 etc. of the asphalts in carbonate rocks may be used as indicators for the extent of maturity of earbenate source rocks. Based on measurements carried on asphalts of pertinent occurrences. R^0=1.65.H/C=0.75, d002=3.53 A are suggested as creteria for the distinction between Oil and natural gas field in carbonate terrains in China. 相似文献
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