Reference

Serpentinizing mantle peridotites have been identified as a significant contributor to commercial oils. This is supported by research that indicates a mantle-like trace element composition in petroleum, suggesting a link between serpentinization processes and the formation of hydrocarbons. The geologic setting and organic geochemistry of Brazilian oils, for instance, point towards a major contribution from serpentinizing mantle peridotites.

The process of serpentinization involves the interaction of water with peridotite rocks, leading to the formation of hydrous minerals and the release of fluids rich in methane and hydrogen. These fluids can migrate into the crust and contribute to the formation of commercial oil and gas deposits. The trace element evidence and the median trace metal abundances in oils from various Brazilian basins further support the theory that serpentinization plays a crucial role in oil formation.

Researchers like Peter Szatmari have proposed that petroleum forms in commercial amounts through Fischer-Tropsch-type synthesis over serpentinizing peridotites, particularly along plate boundaries. This theory is supported by the discovery of commercial abiogenic natural gas reservoirs, such as those in the Songliao Basin, which provide a typical example of the abiogenic origin of hydrocarbons.

In summary, serpentinizing mantle peridotites contribute significantly to the formation of commercial oils through a series of geological and chemical processes that result in the generation of hydrocarbons. This understanding is supported by various studies and the compositional analysis of oils and gases from different regions around the world. For more detailed information, you can refer to the following sources:

• Mantle-like Trace Element Composition of Petroleum Contributions from Serpentinizing Peridotites
• Trace Element Evidence for Major Contribution to Commercial Oils by Serpentinizing Mantle Peridotites