Tannenbaum E, Kaplan I R
Institute of Geophysics and Planetary Physics, University of California, Los Angeles 90024, USA.
Nature. 1985 Oct 24;317:708-9. doi: 10.1038/317708a0.
The validity of applying laboratory pyrolysis experiments to simulating the maturation of organic matter in sedimentary basins has been vigorously debated. We report here results from the generation of hydrocarbons of low relative molecular mass (Mr) in both hydrous and dry pyrolysis. A principal difference is that under dry conditions in the presence of montmorillonite, catalysis occurs with respect to generation of low-Mr hydrocarbons but no such effect is evident for hydrous conditions, probably because of a reduction in the clay's acidity. In addition, olefins which were previously reported as not being present in the products of hydrous pyrolyses were found to be produced in the C2-C6 range in comparable amounts under both hydrous and dry pyrolyses at 300 degrees C and may form in the course of kerogen catagenesis in nature but disappear with geologic time due to their instability. These studies have relevance to understanding the interactions between kerogen and minerals in sedimentary rocks and to processes in the formation of natural gas.
将实验室热解实验应用于模拟沉积盆地中有机质成熟度的有效性一直存在激烈争论。我们在此报告含水热解和干热解过程中低相对分子质量（Mr）烃类生成的结果。一个主要差异是，在干燥条件下蒙脱石存在时，会发生关于低Mr烃类生成的催化作用，但在含水条件下这种效应不明显，这可能是由于粘土酸度降低所致。此外，先前报道在含水热解产物中不存在的烯烃，在300摄氏度的含水和干热解条件下均能以相当的量在C2 - C6范围内生成，并且可能在自然界干酪根热催化降解过程中形成，但由于其不稳定性会随地质时间而消失。这些研究对于理解沉积岩中干酪根与矿物之间的相互作用以及天然气形成过程具有重要意义。
