A little part is from coal-measures abiogenic gas and from internal abiogenic gas or is known as mantle-derived gas, inorganic matter accounts for21.
少部分来自于煤系地层的无机成因气和深层的无机成因气或者叫幔源气，无机组分在21。
2
Deep source gas refers to inorganic genetic gas or abiogenic gas which comes from deep crust or upper mantle, and has apparent geology and geochemistry characteristics.
深源气是指来自地壳深部或上地幔的无机成因天然气或称非生物成因天然气，它具有明显的地质地球化学特征。
3
Abiogenic petroleum could also provide food for one of the most intriguing targets of all for the Deep Carbon Observatory: the bacteria that live in the Earth's depths.