2004/11/16 | What is Organic Petrology?
类别(学习札记) | 评论(2) | 阅读(111) | 发表于 10:00
有机岩石学是研究地壳中与有机质相关的岩石、矿物及特定的有机岩石组成，主要包括油页岩、干酪根、煤、沥青、有机包裹体、古植物化石、孢子花粉及环境中存在的有机物固体颗粒物如气溶胶等。
Definition:
Organic Petrology is the branch of earth science dealing with the origin, occurrence, structure, and history of sedimentary organic matter (OM). Petrology is broader in scope than petrography, which is concerned mostly with the description and classification of sedimentary OM. Thus, organic petrology, broadly defined, includes virtually all aspects of OM-bearing rocks, and encompasses all possible analytical methods. The fields of organic petrology and organic geochemistry are covered in these general reference works.
Characteristics of OP:
The great complexity, heterogeneity, and non-crystalline nature of sedimentary OM poses difficult analytical challenges to organic petrologists. Investigation of such complex materials both requires effective classification system(s) and a diverse " grab bag " of analytical techniques. Historically, the optical microscope has provided one of the most useful tools in this effort, as it takes advantage of the remarkable ability of the human eye to recognize systematic patterns in complex systems; but emphasis in recent years has shifted more toward geochemical analysis methods, including solvent extraction, various pyrolysis methods, gas and liquid chromatography, mass spectroscopy, and nuclear magnetic resonance spectroscopy.



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