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Dating formation of natural gas pools using fluid inclusion data from reservoirs

Chinese Science Bulletin 2002年第18期47卷 1567-1572页

作者： Xianming Xiao Zufa Liu Jiaku Mi Dehan Liu Jiagui Shen Zhiguang Song Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Organ Geochem Guangzhou 510640 Peoples R China

A method has been suggested which is based on the homogenization temperatures and other data of fluid inclusions from a reservoir rock, with the combination of burial and geothermal history of the hosted rock, to date the gas reservoir formation. On the basis of this, a case study of the Carboniferous-Permian gas pools in the Ordos Basin has been conducted. The results have shown that the reservoir sandstones of the gas pool were filled by gases during 125-150 Ma, earlier in the southern area and later in the northern area, which is consistent with the basin’s geological and geochemical background under which the gas pools formed.

关键词： fluid inclusion Ordos Basin geochronology of gas res-ervoir deep basin gas trap.

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Gas-phase cluster cations generated by direct laser ablation on AgBr/S mixture

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Science China Chemistry 1998年第2期41卷 182-186页

作者：崔卫东彭必先刘鹏高振朱起鹤孔繁敖 Institute of Photographic Chemistry Chinese Academy of Sciences Beijing China State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences Beijing China

The clusters produced by direct laser ablation on the sample made of mixtures of silver bromide and sulfur powder in different molar ratios have been studied with a home-built tandem time-of-flight mass spectrometer. The results showed that Ag3S+ was still formed even if the content of AgBr was very high in the samples (AgBr:S= 100:5). Additionally, the clusters, the general formula of which is Ag m S p + (m = 1–3,p = 1–5), were formed, predominantly AgS p + . The above binary clusters could combine AgBr units to produce ternary clusters. This work provided a further experimental proof for the argument proposed by the present authors that Ag3S+ and the analogs are deep photoelectron trap. of photosensitive silver halide emulsion during the exposure process.

关键词： Ag/S clusters Ag/Br/S clusters photographic process photoelectron trap.

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