The phrase "are mainly a consequence of" is correct and usable in written English.
It can be used to indicate that something is primarily the result of certain factors or causes.
Example: "The recent changes in climate patterns are mainly a consequence of human activities such as deforestation and fossil fuel consumption."
Alternatives: "are primarily due to" or "are largely a result of".
Extraordinary properties of nanostructures are mainly a consequence of quantum confinement effects.
Their properties are mainly a consequence of the formation of nanoscale bainitic ferrite plates at very low temperatures.
These excellent properties are mainly a consequence of the formation of bainitic ferrite plates just a few nanometers thick without using severe deformation, mechanical processing or rapid cooling.
These excellent properties are mainly a consequence of the formation of a nanoscale bainitic microstructure consisting of a mixture of bainitic ferrite and carbon-enriched retained austenite.
These increased data rates are mainly a consequence of two important new features: (1) multiple antenna technology at transmission and reception, and (2) optional doubling of the system bandwidth thanks to the availability of an additional 20 MHz band.
These remarkable properties are mainly a consequence of the long-range correlations that emerge close to the critical point, producing collective behaviors and coordinated responses of the entire system.
Any of these may be contributory causes; but the present breakdown of law and order in America is mainly a consequence of the worship of Prosperity.
The much-trumpeted accomplishment of shaving almost a quarter of a trillion dollars off the national debt was mainly a consequence of the gridlock both parties deplored.
The fact is that however much alcohol abuse is painted as a failure of personal choice, it's mainly a consequence of aggressive selling in a highly profitable economic sector.
This makes it extremely difficult to tell whether the trend toward lower abortion rates in Western democracies really reflects the success of "safe, legal and rare," as Saletan would have it, or whether it's mainly a consequence of the enormous gap in wealth and development that still separates the West from the rest.
