Danyen mai
 Fetur | |
|---|---|
kayayyaki, nonmineral (en)  , mixture (en) da commodity (en) | |
 | |
| Bayanai | |
| Ƙaramin ɓangare na |
organic non-mineral compound (en) da fossil fuel (en) |
| UN classification code (en) | F1 |
| 2022 Harmonized System Code (en) | 331 |
Man Fetur, wanda kuma aka sani da ɗanyen mai, ko kuma kawai mai, wani ruwa ne da ke faruwa ta halitta mai launin rawaya-baƙi na gauraye na musamman hydrocarbons, kuma ana samunsa a cikin tsarin ƙasa. Sunan man fetur ya kunshi duka danyen mai da ba a sarrafa su a zahiri da kuma kayayyakin man fetur wadanda suka kunshi tataccen danyen mai. Man fetur, man fetur yana samuwa ne lokacin da yawancin matattun kwayoyin halitta, akasari zooplankton da algae, aka binne su a ƙarƙashin dutsen sedimentary kuma an fuskanci zafi da matsa lamba.