IRONORE/MET/L Mining behemoths BHP Group BHP.AX rose 1.4%, Rio Tinto RIO.AX gained 1.9%, and Fortescue FMG.AX advanced 0.7%. By Roshan Thomas Nov 21 (Reuters) - Australian shares rose for a second straight session on Tuesday led by mining and gold stocks, while investors gauged the central bank chief's warning that inflation remained a crucial challenge even as interest rates hit a more than decade high. The minutes expressed concern that failure to raise rates this month could lead to unmoored inflation expectations, which outweighed arguments for delaying policy.