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Marketwired
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Perseus Mining Limited Updates Life of Mine Plan for Edikan Gold Mine

PERTH, WESTERN AUSTRALIA -- (Marketwired) -- 02/21/17 -- NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Perseus Mining Limited (ASX: PRU)(TSX: PRU) is pleased to announce details of its updated Life of Mine Plan ("LOMP") for its Edikan Gold Mine in Ghana, West Africa ("Edikan").

HIGHLIGHTS

--  Perseus has updated its LOMP for Edikan commencing July 1, 2017,
    following a re-estimation of Mineral Resources and Ore Reserves.
    Independently estimated Proved and Probable Ore Reserves for Edikan
    total 56.5 million tonnes of ore, grading 1.14 g/t gold and containing
    2,078 kozs ounces of gold as at December 31, 2016;

--  Comparisons of the updated Edikan Mineral Resource models against ore
    delineated by grade control during the last three months of 2016 and in
    January 2017 indicate that the updated Resource estimates on which the
    Ore Reserves are based are likely to be more reliable predictors of ore
    tonnes and grades than the Resource models used previously, resulting in
    a closer correlation between forecasts and actual gold production and
    improved reliability of the LOMP;

--  Consistent with the revised Ore Reserve that contains 15% more tonnes,
    8% lower grade and 5% more contained gold than previously estimated, the
    life of mine production profile is slightly flatter but extends for
    longer than the previous LOMP published in April 2016;

--  Estimated remaining life of mine gold production of 1,388 kozs is 96.6%
    of the amount estimated for the corresponding period in the previous
    LOMP. Gold production averages 214,000 ounces/annum over Edikan's
    remaining 6.5 year mine life (from July 1, 2017) including production of
    approximately 240,000 ounces/annum for the next 5 years;

--  Forecast weighted average all-in site costs including all direct
    production costs, royalties, waste stripping costs and sustaining
    capital expenditure ("AISC") of US$875 per ounce in the 5 year period
    from July 1, 2017 to June 30, 2022 and US$864 per ounce over the full
    remaining life of mine;

--  Forecast sustaining capital costs (including the cost of site
    rehabilitation) which are included in the estimate of the AISC, total
    US$34.5 million;

--  The Edikan LOMP forecasts strong positive after tax cash flow totalling
    approximately US$403 million (or A$0.52per share at an A$:US$ exchange
    rate of 0.75), assuming a flat spot gold price of US$1,200 per ounce for
    the remaining mine life from January 1, 2017; and

--  The LOMP should be considered in conjunction with previously provided
    production and cost guidance for the June 2017 Half Year. With 25% of
    the June 2017 Half Year elapsed, Perseus is on track to achieve in the
    middle of the production guidance range of 90 kozs to 100 kozs of gold
    and is currently positioned towards the middle of the cost guidance
    range of US$1,000 to US$1,220 per ounce.

UPDATED LIFE OF MINE PLAN FOR EDIKAN GOLD MINE

1.  Overview

The updated LOMP for Edikan involves mining and processing of ore from six open pits (Refer to Figure 1 below) based on optimisation, design and scheduling using a gold price of US$1,200 per ounce and input parameters based on Perseus's operating experience including costs from recently contracted supply contracts.

To view Figure 1: Edikan Gold Mine layout, visit the following link: http://media3.marketwire.com/docs/Perseus-figure1.pdf.

Based on the LOMP, the key forecast operating statistics for Edikan are summarised below in Tables 1 below.

Table 1: Overview Key Parameters of the updated LOMP
----------------------------------------------------------------------------
Parameter                          Units  Average per year             Total
----------------------------------------------------------------------------
Ex-Pit Mining                                   FY18-22(1)      Life of Mine
----------------------------------------------------------------------------
Total ore + waste mined               Mt              34.7             156.1
Waste mined                           Mt              25.4             114.5
Ore mined                             Mt               9.2           41.6(2)
Head grade                      g/t gold              1.13              1.13
Strip ratio                          t:t               2.8               2.8
----------------------------------------------------------------------------
Note: 1. Perseus has a financial year that ends on June 30.
      2. The LOMP excludes the Esuajah South Ore Reserve, but all other Ore
         Reserves are included consistent with Table 5 in Section 3 of this
         document.

Table 1: Overview Key Parameters of the updated LOMP (Continued)
----------------------------------------------------------------------------
Parameter                    Units       Average per year        Total
----------------------------------------------------------------------------
Processing                                      FY18-22(1)      Life of Mine
----------------------------------------------------------------------------
Quantity ore processed                Mt               7.3           47.6(2)
Head grade processed            g/t gold              1.19              1.06
Contained gold               '000 ounces               281             1,624
Gold recovery rate                     %              88.3              88.1
Mine Call Factor(3)                    %               3.0               3.0
Gold production              '000 ounces               240             1,388
----------------------------------------------------------------------------
Operating and Capital
 Costs
----------------------------------------------------------------------------
Average mining costs     US$/tonne mined              3.24              3.29
Average processing             US$/tonne
 costs                         processed              9.14              9.21
Average general &
 administration ("G&A")        US$/tonne
 costs                         processed              2.37              2.16
Production costs               US$/ounce               769               758
Royalty                        US$/ounce                81                81
Sustaining capital             US$/ounce                25                25
All-in site costs              US$/ounce               875               864
----------------------------------------------------------------------------
Note: 1. Perseus has a financial year that ends on June 30.
      2. Includes Ore mined ex-pit plus Ore drawn from ROM stockpile and
         Heap Leach pads.
      3. The Mine Call Factor is an allowance to cover any residual mine to
         mill reconciliation issues that may exist after the full
         implementation of improvement measures that among other things,
         have included the new Mineral Resource estimates.

2.  Comparison of Key Parameters relative to the April 2016 EDIKAN LOMP

The current LOMP differs relative to the prior version of the LOMP released in April 2016, as shown below in Table 2.

Table 2: Overview Key Parameters of the updated LOMP
----------------------------------------------------------------------------
                                                       2016    2017
Parameter                                     Units LOMP(1) LOMP(2) % Change
----------------------------------------------------------------------------
Mining
----------------------------------------------------------------------------
Total ore + waste mined                          Mt   149.5   156.1       +4
Waste mined                                      Mt   109.3   114.5       +5
Ore mined                                        Mt    40.2    41.6       +4
Head grade                                 g/t gold    1.15    1.13       -2
Strip ratio                                     t:t     2.7     2.8       +4
----------------------------------------------------------------------------
Processing
----------------------------------------------------------------------------
Average quantity ore processed              Mt/year     7.2     7.3       +1
Head grade processed                       g/t gold    1.08    1.06       -2
Contained gold                          '000 ounces   1,624   1,624        0
Gold recovery rate                                %    88.5    88.1       -1
Mine Call Factor                                  %       -     3.0       NA
Gold production                         '000 ounces   1,437   1,388       -3
Average gold production           '000 ounces/ year     221     214       -3
----------------------------------------------------------------------------
Operating and Capital Costs
----------------------------------------------------------------------------
Average mining costs                US$/tonne mined    3.47    3.29       -5
Average processing costs        US$/tonne processed    8.73    9.21       +5
Average Site G&A costs          US$/tonne processed    2.19    2.16       -1
Production costs                          US$/ounce     714     758       +6
Royalty                                   US$/ounce      81      81        0
Sustaining capital                        US$/ounce      16      25      +56
All-in site costs                         US$/ounce     811     864       +7
----------------------------------------------------------------------------
Notes: 1. FY2017 omitted from 2016 LOMP for comparison purposes
       2. LOMP commences July 1, 2017 and ends December 31, 2023

3.  Mineral Resources and Ore Reserves

The updated global Measured and Indicated Mineral Resource for Edikan is now estimated as 155.8 Mt grading at 1.0g/t gold, containing 5,011 kozs of gold as shown in Table 3. The Mineral Resource includes the Esuajah South Underground Resource, which is not included in the current LOMP.

Table 3: Edikan's Measured and Indicated Mineral Resources - December 2016
----------------------------------------------------------------------------
                        Deposit
Deposit                  Type       Measured Resources  Indicated Resources
                                  ------------------------------------------
                                   Quantity Grade  Gold Quantity Grade  Gold
                                              g/t                  g/t
                                         Mt  gold   koz       Mt  gold   koz
----------------------------------------------------------------------------
AF Gap(1, 2)            Open Pit       11.0  0.97   342     35.6  0.84   963
Fobinso(1, 2)           Open Pit        2.7  1.08    93     11.8  0.94   357
Esuajah North(1, 2)     Open Pit       11.4  0.96   352     19.5  0.89   557
Fetish(1, 2,5)          Open Pit        9.6  1.00   309     23.9  0.90   692
Chirawewa North(1, 2)   Open Pit        1.4  0.85    38      5.7  0.82   150
Chirawewa South(1, 2)   Open Pit        0.2  1.16     6      0.6  1.02    19
Bokitsi South(1, 2)     Open Pit        0.9  2.57    71      1.1  1.90    66
----------------------------------------------------------------------------
Sub-Total               Open Pit       37.2  1.01 1,211     98.2  0.89 2,804
----------------------------------------------------------------------------
Esuajah South(3)        U/ground        8.5   1.9   533      6.3   1.7   353
Heap Leach(4)           Stockpile                            4.3   0.6    89
ROM Stockpiles          Stockpile       1.4  0.61    28        -     -     -
----------------------------------------------------------------------------
Total                                  47.1  1.17 1,772    108.8  0.93 3,246
----------------------------------------------------------------------------

Table 3: Edikan's Measured and Indicated Mineral Resources
 - December 2016
----------------------------------------------------------
                        Deposit     Measured + Indicated
Deposit                  Type             Resources
                                  ------------------------
                                    Quantity  Grade   Gold
                                                g/t
                                          Mt   gold    koz
----------------------------------------------------------
AF Gap(1, 2)            Open Pit        46.6   0.87  1,305
Fobinso(1, 2)           Open Pit        14.5   0.97    450
Esuajah North(1, 2)     Open Pit        30.9   0.92    909
Fetish(1, 2,5)          Open Pit        33.5   0.93  1,001
Chirawewa North(1, 2)   Open Pit         7.1   0.83    188
Chirawewa South(1, 2)   Open Pit         0.8   1.05     25
Bokitsi South(1, 2)     Open Pit         1.9   2.20    137
----------------------------------------------------------
Sub-Total               Open Pit       135.3   0.92  4,015
----------------------------------------------------------
Esuajah South(3)        U/ground        14.8    1.8    879
Heap Leach(4)           Stockpile        4.3    0.6     89
ROM Stockpiles          Stockpile        1.4   0.61     28
----------------------------------------------------------
Total                                  155.8   1.00  5,011
----------------------------------------------------------

A further 30.0 Mt of material grading at 0.9 g/t gold and containing a further 899 kozs of gold are classified as Inferred Resources. Details of these estimates are shown below in Table 4.

Table 4: Edikan's Inferred Mineral Resources - December 2016
----------------------------------------------------------------------------
Deposit                   Deposit Type             Inferred Resources
                                           ---------------------------------
                                              Quantity      Grade       Gold
                                                    Mt   g/t gold        koz
----------------------------------------------------------------------------
AF Gap(1, 2)              Open Pit                 9.4        0.8        250
Fobinso(1, 2)             Open Pit                 3.5        0.9         95
Esuajah North(1, 2)       Open Pit                 2.9        0.9         88
Fetish(1, 2,5)            Open Pit                 6.3        1.0        191
Chirawewa North(1, 2)     Open Pit                 1.5        0.8         39
Chirawewa South(1, 2)     Open Pit                0.04        1.1          1
Bokitsi South(1, 2)       Open Pit                 1.3        1.1         43
Esuajah South(3)          Underground              4.7        1.3        192
----------------------------------------------------------------------------
Total                                               30        0.9        899
----------------------------------------------------------------------------

Notes on Tables 3 and 4:

1.  Allows for mining depletion to December 31, 2016.
2.  0.4g/t gold cut-off applied
3.  0.7g/t gold cut-off grade applied
4.  At zero cut-off grade
5.  Includes Bokitsi North lode
6.  Mineral Resources are inclusive of any Ore Reserves
7.  Numbers are rounded and may not add up correctly in the table
8.  Note that the Dadieso and Mampong deposits have been removed from the
    Mineral Resource on economic grounds

Edikan's updated Ore Reserve which is summarised below in Table 5 is estimated at 56.5 million tonnes of ore, grading 1.14 g/t gold and containing 2,078kozs of gold and is based on the re-estimated Edikan Mineral Resources as at 31 December 2016 and updated pit optimisation, design and scheduling of the Open Pit resources and a new Esuajah South Ore Reserve based on underground mining methods. Table 5 reports the Ore Reserves by category, deposit and type, above variable cut-off grades. The classification categories of Proved and Probable under the JORC Code are equivalent to the CIM categories of the same name (CIM, 2010).

Table 5: Edikan's Proved and Probable Ore Reserves as at December 31, 2016
----------------------------------------------------------------------------
                    Deposit
Deposit              Type              Proved                Probable
                              ----------------------------------------------
                                Quantity  Grade  Gold  Quantity  Grade  Gold
                                            g/t                    g/t
                                      Mt   gold   koz        Mt   gold   koz
----------------------------------------------------------------------------
AF Gap              Open Pit         5.5   1.09   191       6.0   1.07   208
Fobinso             Open Pit         1.1   1.19    44       3.3   1.11   119
Esuajah North       Open Pit         6.5   1.10   229       7.8   1.04   262
Fetish              Open Pit         4.6   1.21   179       7.9   1.11   281
Chirawewa North     Open Pit         0.5   1.05    17       2.0   0.99    63
Bokitsi             Open Pit         0.5   2.94    44       0.1   2.75    10
----------------------------------------------------------------------------
Sub-total           Open Pit        18.7   1.17   704      27.1   1.08   943
----------------------------------------------------------------------------
Esuajah South       U/ground                                4.9    2.0   314
Heap Leach          Stockpile                               4.3    0.6    89
ROM Stockpiles      Stockpile        1.4   0.61    28
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Total                               20.1   1.13   733      36.3   1.13 1,346
----------------------------------------------------------------------------

Table 5: Edikan's Proved and Probable Ore Reserves as
 at December 31, 2016
-----------------------------------------------------
                    Deposit
Deposit              Type        Proved + Probable
                              -----------------------
                                Quantity  Grade  Gold
                                            g/t
                                      Mt   gold   koz
-----------------------------------------------------
AF Gap              Open Pit        11.5   1.08   399
Fobinso             Open Pit         4.5   1.13   163
Esuajah North       Open Pit        14.3   1.07   491
Fetish              Open Pit        12.5   1.15   459
Chirawewa North     Open Pit         2.5   1.01    80
Bokitsi             Open Pit         0.6   2.91    55
-----------------------------------------------------
Sub-total           Open Pit        45.8   1.12 1,647
-----------------------------------------------------
Esuajah South       U/ground         4.9      2   314
Heap Leach          Stockpile        4.3    0.6    89
ROM Stockpiles      Stockpile        1.4   0.61    28
-----------------------------------------------------
-----------------------------------------------------
Total                               56.5   1.14 2,078
-----------------------------------------------------

Notes:

1.  Numbers are rounded and may not add up correctly in the table
2.  All the estimates are on a dry tonne basis
3.  Based on December 2016 Mineral Resource estimation
4.  Variable gold cut-off grade based on material type and mining method
5.  Inferred Mineral Resource is treated as mineralised waste
6.  Allows for mining depletion up to and including December 31, 2016
7.  ROM denotes Run of Mine
8.  Heap Leach refers to decommissioned heap leach pads established by prior
    owners of Edikan

Proven and Probable Ore Reserves are found within the economic limits of six discrete open pits, an underground project (not currently included in the LOMP) and stockpiles that have been designed based on Measured and Indicated Mineral Resources that incorporated all available Resource drilling results, a gold price of US$1,200 per ounce and mining, processing and general and administration costs derived from recent operating experience.

4.  Gold production profile

With the aim of maximising the return on funds employed at Edikan, the mining sequence of the pits along with mill feed profile has been optimised and scheduled. The result of this scheduling is that the gold production profile and resulting cash flows from Edikan remain strong for the remainder of the mine life. (Refer to Figures 2, 3 and 4 below.)

To view Figure 2: Edikan Gold Mine - scheduled monthly material movement ex-pit (tonnes), visit the following link: http://media3.marketwire.com/docs/Perseus-figure2.pdf.

To view Figure 3: Edikan Gold Mine - Monthly tonnes and grade to Mill, visit the following link: http://media3.marketwire.com/docs/Perseus-figure3.pdf.

To view Figure 4: Edikan Gold Mine - Gold Production by Pit, visit the following link: http://media3.marketwire.com/docs/Perseus-figure4.pdf.

While the development of the Esuajah South deposit is not currently included in Edikan's production profile, the risk/return equation relating to the development of this deposit using underground mining techniques would change in a higher gold price environment and therefore development of this deposit may be included in future versions of the LOMP.

5.  Improved operating efficiencies

During calendar year 2016, Perseus invested heavily in upgrading key elements of the process plant and also establishing standby power generating capacity to ensure continuity of operations irrespective of the availability of power from the national electricity grid. These works were largely completed in the December 2016 quarter and were intended to enhance the Company's ability to deliver the updated LOMP.

Plant performance in latter part of the December 2016 Quarter, and in calendar 2017 to date confirm that forecast run time, throughput rates and gold recovery rate are readily achievable.

Average annual processing throughput rate of ore is nominally 7.3Mtpa, with throughput rates variable by material type and deposit. The processing circuit involves single stage crushing, semi-autogenous grinding, gravity recovery, flotation, regrind and CIL. Assumed run time which is the product of availability and utilisation is forecast to average 90% for the remaining life of mine

The process metallurgical recovery for gold is fixed by material type in each deposit. Gold recovery rates range from 59.5-69% for oxide ore and 86-94% for primary ore. The variable recoveries are a function of differing metallurgical properties of ores from different deposits. Recoveries by pit are as shown in Table 6.

Table 6: Metallurgical recoveries by material type and pit
----------------------------------------------------------------------------
                          Recovery by Ore Type (%)
----------------------------------------------------------------------------
Deposit                          Oxide         Transition              Fresh
----------------------------------------------------------------------------
AF Gap                            61.0               73.4               88.0
Fobinso                           61.0               73.4               88.0
Chirawewa                         59.5               72.0               86.0
Bokitsi                           69.0               78.0            87.0(1)
Fetish                            61.0               73.4               90.0
Esuajah North                     61.0               73.4               93.0
Heap Leach                        67.0                  -                  -
----------------------------------------------------------------------------
(1) Average value, the recovery for Bokitsi is variable based on the input
grade

6.  Substantial decrease in sustaining capital

In the two years to December 2016, Perseus has invested heavily in a programme of capital works at Edikan that included upgrading the processing plant, installing electricity generating capacity, construction of relocation housing to house people impacted by mining operations and pre-stripping three open pits.

With the completion of this work, the amount of capital expenditure required to sustain the Edikan operation for the remaining mine life has reduced materially. Total remaining life of mine capital expenditure of US$34.5 million is forecast, including approximately US$8 million of capital to complete rehabilitation of the mine site when operations cease.

7.  Future cash flows and sensitivity analysis

Based on the LOM gold production and cost parameters, the net after tax cash flows forecast to be generated by Edikan from January 1, 2017, at US$1,200 per ounce gold price, are estimated to total US$403 million or A$0.52 per share (assuming an A$:US$ exchange rate of 0.75).

The sensitivity analysis shown below in Table 7 summarises the sensitivity of Edikan's net after tax cash flows to movements in the gold price. Within an expected short term trading range of US$1,100 per ounce to US$1,300 per ounce, the projected cash flows of the mine remain robust and capable of materially contributing to the development funding of Perseus's two growth projects, namely the Sissingue Gold Mine and the Yaoure Gold Mine, both located in Cote d'Ivoire.

Table 7: Sensitivity Edikan's After Tax Cashflow to gold price movements
----------------------------------------------------------------------------
                                 Gold Price
----------------------------------------------------------------------------
      US$1,100/ounce           US$1,200/ounce            US$1,300/ounce
----------------------------------------------------------------------------
      US$319 million           US$403 million            US$487 million
       A$0.41/share             A$0.52/share             A$0.63 / share
----------------------------------------------------------------------------

Caution Regarding Forward Looking Information:

This report contains forward-looking information which is based on the assumptions, estimates, analysis and opinions of management made in light of its experience and its perception of trends, current conditions and expected developments, as well as other factors that management of the Company believes to be relevant and reasonable in the circumstances at the date that such statements are made, but which may prove to be incorrect. Assumptions have been made by the Company regarding, among other things: the price of gold, continuing commercial production at the Edikan Gold Mine without any major disruption, development of a mine at Tengrela, the receipt of required governmental approvals, the accuracy of capital and operating cost estimates, the ability of the Company to operate in a safe, efficient and effective manner and the ability of the Company to obtain financing as and when required and on reasonable terms. Readers are cautioned that the foregoing list is not exhaustive of all factors and assumptions which may have been used by the Company. Although management believes that the assumptions made by the Company and the expectations represented by such information are reasonable, there can be no assurance that the forward-looking information will prove to be accurate. Forward-looking information involves known and unknown risks, uncertainties, and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any anticipated future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, the actual market price of gold, the actual results of current exploration, the actual results of future exploration, changes in project parameters as plans continue to be evaluated, as well as those factors disclosed in the Company's publicly filed documents. The Company believes that the assumptions and expectations reflected in the forward-looking information are reasonable. Assumptions have been made regarding, among other things, the Company's ability to carry on its exploration and development activities, the timely receipt of required approvals, the price of gold, the ability of the Company to operate in a safe, efficient and effective manner and the ability of the Company to obtain financing as and when required and on reasonable terms. Readers should not place undue reliance on forward-looking information. Perseus does not undertake to update any forward-looking information, except in accordance with applicable securities laws.

Competent Person Statement

All production targets for Edikan referred to in this report are underpinned by estimated Ore Reserves which have been prepared by competent persons in accordance with the requirements of the JORC Code. The information in this report in relation to Edikan Mineral Resource and Ore Reserve estimates was previously published in a market release dated February 21, 2017. The Company confirms that all material assumptions underpinning those estimates and the production targets, or the forecast financial information derived therefrom, in that market release continue to apply and have not materially changed. The Company further confirms that material assumptions underpinning the estimates of Ore Reserves described in "Technical Report - Central Ashanti Gold Project, Ghana" dated May 30, 2011 continue to apply. Gary Brabham and Paul Thompson, each of whom is a Qualified Person as defined in NI 43-101 and an employee of the Company, have approved the inclusion of technical and scientific information in this report.

Contacts:
To discuss any aspect of this announcement, please contact:
Managing Director:
Jeff Quartermaine
+61 8 6144 1700
jeff.quartermaine@perseusmining.com

Investor Relations:
Cathy Moises (Perth/Melbourne)
+ 61 412196350
cathy.moises@perseusmining.com

Media Relations:
Nathan Ryan (Melbourne)
+61 4 20 582 887
nathan.ryan@nwrcommunications.com.au

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