Total rings of quotients of higher dimensional Iwasawa algebras

Let $\mathcal G=H\rtimesΓ$ be a semidirect product of a finite group $H$ with $Γ=\mathbb Z_p^d$, the direct product of finitely many copies of the additive group of the $p$-adic integers. In the case $d=1$, Iwasawa algebras of such profinite groups were studied by Ritter--Weiss, Lau, Nickel, and the