Objective Material exchange between magma and coal has recently received much attention,with published studies dedicated mainly to intrusion-related geochemical
<正>Objective The distribution characteristics and formation mechanism of rearranged hopanes in hydrocarbon source rocks are affected by various geological cond
Organic carbon isotopes in sediments have been frequently used to identify the source of organic matter.Here we present a study of organic δ~(13)C on two sedim