利用双金刚烷指标研究下古生界海相碳酸盐岩的热成熟度

THERMAL MATURITY OF LOWER PALAEOZOIC MARINE CARBONATE ROCKS-A DOUBLE ADAMANTANE INDEX STUDY

金刚烷类化合物是一类具有重要地球化学意义的结构特殊的化合物。其中的双金刚烷系列化合物尤为重要，本文建立的双金刚烷成熟度指标X(MD)与镜质组反射率具有良好的相关关系，利用该成熟度指标可以解决高演化阶段判定烃源岩和原油成熟度等难题。对于缺乏镜质体的下古生界海相碳酸盐烃源岩，利用该指标判定成熟度就显得尤为重要。

Adamantane compounds possess a very special structure, which are of important geochemical significance, and the double-adamandane compounds seem more important. The maturity index X_(MD) has a good relationship with the reflectivity of vitrinites. Some problems such as hydrocarbon-generating rocks and crude maturity at high evoution stage can be solved using the index. The index is especially important to the Lower Palaeozoic marine carbonate rocks.