(EnergyAsia, December 14 2010, Tuesday) — Australia’s Riversdale Mining, which is developing coal mines in Africa, said it is holding talks for a possible A$3.5 billion takeover by UK’s Rio Tinto. (US$1=A$1.02). Riversdale, which is 24.16% owned by India’s Tata, made the announcement last week after its talks with Rio Tinto was reported by the…