(Sharecast News) - Savannah Resources' chief financial officer Christopher Michael McGarty disposed of 2.03m ordinary shares in the AIM-listed firm on Thursday.McGarty, a graduate in finance from Manchester University's Business School, sold the shares at an average price of 8p for a total value of £163,000.Savannah noted that the share sale effectively covered the purchase price and PAYE tax relating to share options previously exercised by McGarty.The group told investors back in July that its Mina do Barroso lithium project in Northern Portugal has the potential to be a "major European producer" of spodumene lithium.Savannah's recently undertaken scoping study at Mina do Barroso demonstrated "robust project economics" with the potential to deliver substantial shareholder value at the project, which it considered to be of "low technical risk" with open pit mining and conventional processing to produce a spodumene concentrate for export sale.The London-based firm strong outcomes based on an average annual run-of-mine production of 1.3Mt per year, over 11 years, pointed to a life of mine EBITDA of $805m, or $72m per year.As of 1600 BST, Savannah shares had dropped 4.74% to 7.81p.Top Director BuysPlus500 Ltd (di) (PLUS)Director name: King ,Daniel JosephAmount purchased: 3,029 @ 1,650.00pValue: £49,978.50Volex (VLX)Director name: Rothschild,NathanielAmount purchased: 40,000 @ 75.20pValue: £30,080.00Volex (VLX)Director name: Rothschild,NathanielAmount purchased: 40,000 @ 75.20pValue: £30,080.00Deltex Medical Group (DEMG)Director name: Keen,Nigel JAmount purchased: 2,000,000 @ 0.80pValue: £16,000.00Kaz Minerals (KAZ)Director name: Watson,CharlesAmount purchased: 2,063 @ 474.00pValue: £9,778.62Deltex Medical Group (DEMG)Director name: Keen,Nigel JAmount purchased: 1,000,000 @ 0.90pValue: £9,000.00Deltex Medical Group (DEMG)Director name: Keen,Nigel JAmount purchased: 1,000,000 @ 0.85pValue: £8,500.00Volex (VLX)Director name: Morris,Daren Amount purchased: 10,000 @ 75.20pValue: £7,520.00Volex (VLX)Director name: Rothschild,NathanielAmount purchased: 10,000 @ 74.00pValue: £7,400.00Top Director SellsBhp Billiton (BLT)Director name: Beaven,Peter Amount sold: 68,072 @ $32.19Value: $1,280,677.30Savannah Resources (SAV)Director name: McGarty,Christopher Michael Amount sold: 2,037,500 @ 8.00pValue: £163,000.00D4t4 Solutions (D4T4)Director name: Warren,CarmelAmount sold: 58,139 @ 174.00pValue: £101,161.86