Ralf Littke spends much of his time researching Mineralogy, Paleontology, Sedimentary rock, Organic matter and Vitrinite. Ralf Littke combines subjects such as Posidonia Shale, Oil shale, Carbonate, Methane and Coal with his study of Mineralogy. His Oil shale research is multidisciplinary, incorporating elements of Water content and Source rock. To a larger extent, Ralf Littke studies Geochemistry with the aim of understanding Sedimentary rock. The various areas that he examines in his Organic matter study include Environmental chemistry, Pacific ocean, Pyrolysis and Natural. His research investigates the connection with Vitrinite and areas like Maceral which intersect with concerns in Alginite.