The phrase "a vast chasm" is correct and usable in written English.
It can be used to describe a large and significant gap or difference between two things, often in a metaphorical sense.
Example: "There is a vast chasm between the rich and the poor in our society."
Alternatives: "a wide gap" or "a deep divide."
And just as in the First World War, a vast chasm quickly sprang up between wartime rhetoric and wartime reality.
For him, each attempt at a Bach toccata, taken at breakneck tempo, is like a tightrope dash across a vast chasm — the perils of failure are huge.
A vast chasm, however, separates the mature leadership offered by Mayor Michael R. Bloomberg and that demonstrated by the Nassau county executive, Thomas R. Suozzi.
The planet is scarred by a vast chasm, the Valles Marineris, which is five times longer and two and a half times deeper than the Grand Canyon.
There is a vast chasm between pro-Remain supporters in metropolitan areas and pro-Brexit folk in Labour's traditional heartlands in northern England, the Midlands and Wales.
Unlike Hollywood, the video-game industry is marked by a vast chasm between big-budget productions and independent ones, and he had learned with Joe Danger that a small studio could easily become beholden to a distributor.
It now ricochets like a wayward atom in the vast chasm between the poles of women's gymnastics and curling.
The fact that a person auditions for The Apprentice at all is a honking great signal of the vast chasm between themselves and brilliance.
Territory's job was to capture the alternate history of an iPhone-less civilization and the vast chasm between rich and poor within the devices people use in their day to day.
There can be, we learn, a vast social chasm between the "pure deaf" and the hard of hearing, like the singer and actor T. L. Forsberg.
Juan Carlos Aguilar, Raúl Bustos, and two other mechanics found respite from the heat in a workshop at Level 150, in a passageway not far from a vast interior chasm called the Pit.
