Mark Ronson's new single "Valerie" (Columbia), featuring Amy Winehouse on vocals, is the first No. 1 on a new official U.K. black music chart launched this week.

British charts compilers the Official U.K. Charts Company has established the bespoke top 40 chart music of black origin chart exclusively for BBC1Xtra, the BBC's new black music network.

Genres such as rap, hip hop, RnB, U.K. garage and dancehall will find a home on the new chart, which is counted down every Saturday afternoon on the 1Xtra Chart Show with Ronnie Herel.

Tracks released within a three-month time frame will be eligible for the chart, with sales of black music tracked from independent and specialist retailer outlets, plus online retailers nationwide.

"We are pleased to be servicing the BBC - one of our most important media partners - in compiling yet another great music chart," comments OCC managing director Martin Talbot in a statement.

Other artists in the top 10 of the inaugural chart include Kanye West, Akon, Timbaland, Rihanna, 50 Cent and Jennifer Lopez.

Ronson's "Valerie" -- No. 4 this week on the Official U.K. Singles Chart -- is a cover of the Zuton's 2006 hit.