The contents and isotope compositions of carbon in altered oceanic basalts

This data set contains the contents and carbon isotope compositions of total carbon and organic carbon in altered oceanic basalts as sampled by deep sea drilling in IODP Expeditions 327, 329, 330 and DSDP Leg 45. Whole rock powders were analyzed for total carbon and then for organic carbon after removal of carbonate carbon by acid dissolution in order to test for effects of microbial activity and identify any variations with lithology, depth, spreading rate, or temperature.