ADDITIONAL GOLD RESULTS FROM OJVG’S RESOURCE EXPANSION
DRILLING PROGRAM

New Drill Results include:
• 17.14 g/t Au over 14 metres at Golouma West
• 7.68 g/t Au over 27 metres at Golouma West
• 6.90 g/t Au over 7 metres at Kerekounda
• 4.12 g/t Au over 37 metres at Masato

Oromin Explorations Ltd. (“Oromin”), on behalf of Oromin Joint Venture Group Limited (“OJVG”), is
pleased to provide a further update to its ongoing 2010 drilling program at the OJVG Gold Project (the
“Project”) in eastern Sénégal, West Africa. Drilling has been focused on project resource and reserve
expansion with particular emphasis on Golouma Style, higher grade gold deposits and on initial definition
drilling of higher grade gold potential beneath the proposed open pit at the Masato deposit.

Chet Idziszek, President and CEO of Oromin, stated, “The deepest drilling to date at Kerekounda and at
Golouma West has displayed robust grades and widths. The continuity appears excellent, and remains open
to further depth and lateral expansion. We have observed visible gold in numerous drill holes, all within
typical veined, altered mineralized zones. Drilling is presently confirming mineralization below 550 metres
in depth, whereas reserves calculated in the July 2010 Feasibility Study extended to an average depth of only
250 metres. At our Masato targets, the drill program to define underground mining potential continues to
demonstrate excellent continuity of multiple zones. These zones host favourable grades, over widths
amenable to cost-effective underground mining.”

The new drill results, along with those previously reported in Oromin’s December 1, 2010 news release, are
listed below and detailed in Appendix A. These drill results further confirm the continuity of mineralization
and increasing expansion potential for those higher grade Golouma Style deposits down-dip and below the
limits of the resource/reserve block model used for the July 2010 Feasibility Study. Assay highlights from
drilling include:

New Results Previously Reported
26.87 g/t Au over 4 m at Golouma West in DH-905 4.13 g/t Au over 14 m at Kerekounda in DH-896
17.14 g/t Au over 14 m at Golouma West in DH-915 10.05 g/t Au over 14 m at Kerekounda in DH-900
8.77 g/t Au over 5 m at Golouma West in DH-924 5.41 g/t Au over 19 m at Golouma West in DH-901
7.68 g/t Au over 27 m at Golouma West in DH-924
6.90 g/t Au over 7 m at Kerekounda in DH-903
21.20 g/t Au over 2 m at Kerekounda in DH-908

New results from mineralized zones below the proposed open pit at the Masato Deposit continue to extend the
zones of higher grade gold mineralization potentially amenable to underground mining. This mineralization
will be remodelled for the planned resource and reserve update scheduled in Q1 and Q2 of 2011 respectively.

Page 2

Key results from Masato expansion drilling include: (see Appendix B for details)

New Results Previously Reported
2.49 g/t Au over 10 m in DH-902 1.94 g/t Au over 16 m in DH-894
4.12 g/t Au over 37 m in DH-904 6.94 g/t Au over 31 m in DH-895
8.02 g/t Au over 10 m in DH-906 5.49 g/t Au over 3 m in DH-897
2.79 g/t Au over 15 m in DH-909 2.44 g/t Au over 41 m in DH-897
6.52 g/t Au over 5 m in DH-913 2.41 g/t Au over 16 m in DH-899
2.04 g/t Au over 26 m in DH-899

Doug Turnbull, P. Geo., is a qualified person for the purposes of National Instrument 43-101, and has verified
the data disclosed in this news release. William Bond, P. Geo., is also a qualified person for the purposes of
National Instrument 43-101, and has supervised geologic field procedures. TSL Laboratories in Saskatoon
carried out all assaying under industry-standard QA/QC procedures.

To find out more about Oromin Explorations Ltd., visit www.oromin.com.

On behalf of the Board of Directors of
OROMIN EXPLORATIONS LTD.

December 16th, 2010
Categories: Uncategorized . Author: caliche