Hydrogen Imbalance in Petroleum Source

The average molar hydrogen concentration relative to carbon is always higher in petroleum than the source organic matter<br>and thus it becomes a serious concern for the theory of organic origin. On the other hand, abiogenic theory of petroleum<br>generation do not have this problem because hydrogen is available even deep inside the earth either due to serpentinization or<br>by chemical reactions of freshly cut ferromagnesian mineral surface with water.