Ultramicroscopic organic petrology characteristics and component classification of excellent marine source rocks

Petrology and organic petrology analyses were completed for excellent marine source rocks collected from South China in order to study their ultramicroscopic structure. Scanning electron microscope (SEM) and energy dispersive spectrum (EDS) were applied to study mineral components and organic matter occurrence. Organic matter mainly occurs as siliceous biodetritus, calcareous biodetritus, clay-size particles and organic particles. Excellent marine source rocks were classified into six types, including shell detritus, biodetritus, bitumen, authigenic mineral, secondary mineral and terrigenous clay mineral, according to their biotype, biomolecule structure, hydrocarbon generation characteristics and diagenesis evolution.