LONDON, Sept 13 (Reuters) – Several tenders mopped up October loading barrels on Friday though spot activity remained thin ahead of the emergence of November loading programmes next week. * Nigerian Qua Iboe was offered at dated Brent plus $3.00 a barrel, a trader said. * Around 10 cargoes of Angolan oil remain available for export in October. * The November programme is expected to be issued early next week. * Indonesia’s Pertamina awarded its tender for late Novemb