"mainly revolve around" is correct and can be used in written English.
It is used to indicate that a group of ideas, topics, or activities are mostly concerned with the thing mentioned. For example: Her studies mainly revolve around the environment and how it is affected by human activities.
At the small convent beside St .Mary Star of the Sea Catholic Church on Minnieford Avenue, the problems mainly revolve around the church's answering machine.
Despite this being one of the best characterized arcs in the world, there are significant discrepancies between the two existing volumetric datasets14,15, which mainly revolve around questions of the quantity of distributed monogenetic volcanism and glacial erosion along strike.
(Feminists, it should be noted, are also the only ones I see defending LaBeouf. The scant response from "men's rights activists", supposed champions of male victims, seems to mainly revolve around how effeminate LaBeouf is for not fighting his attacker hard enough).
And whether or not that happens will mainly revolve around that word "eelam", which means "homeland" but is silent about just what a homeland should be.In the past, Mr Prabhakaran has always taken the maximalist route, insisting that an eelam should be a fully independent state for Sri Lanka's Tamils to live in.
Studies investigating in situ oligosaccharide generation mainly revolve around xylan and include Courtin et al. (2008) and Bindelle et al. (2011), although none of these systematically focus on the generation in vivo.
This went on for a while, and continued to mainly revolve around the menstrual cycle.
Abba to Zappa's guest columnist James Blunt reveals how he enjoyed some apres ski in Switzerland over Christmas and New Year - 'it mainly revolved around drinking beer.
The après-ski side of it has moved on from the Eighties cliche of Swiss fondues; for me, it mainly revolved around drinking beer.
During this period, defences in Australia mainly revolved around static defence by combined infantry and artillery, based on garrisoned coastal forts.
That mainly revolves around whatever technology is available.
The three of them shared several, mainly revolving around surprising gestures or acts of kindness.
