干酪根中无机矿物对DTA热谱的影响

本文主要针对无机矿物对干酪根DTA热谱的影响,对各类无机矿物分别进行了试验。试验结果表明,(1)煤岩干酪根、沥青、石油等物质的DTA热谱均有各自的特征谱峰,这些谱峰对研究有机质的成熟度具有简便、可靠等优点;(2)无机矿物特别是黄铁矿,对DTA热谱虽有较大影响,但只要在仪器灵敏度的范围内,试验时样品稀释至黄铁矿含量小于2‰。(即稀释前干酪根样品中黄铁矿含量不大于20‰),可视为对测试结果无影响。 

INFLUENCE OF MINERAL MATTER ON DTA THERMOGRAM OF KEROGEN

Aiming at the study on the influence of mineral matter on DTA ther-mogram of kerogen, experiments with various minerals were carried out. The experiments show that. 1. coal, kerogen, bitumen and petroleum all have their own diagnostic peaks on DTA thermograms which could serve as a simple and reliable way to study the maturity of organic matters; 2. mineral matter, especialy pyrite, exert significant influences on DTA thermogram, but if the content of pyrite is less than 2‰ after dilution (i.e.the pyrite content in kerogen is less than 20%), it could be accepted within the permitted range of the sensitivity of the instrument, and there is no influence on the result.