Update

Horizonte Minerals PLC
21 June 2006

        Horizonte Minerals plc / Index: AIM / Epic: HMZ / Sector: Mining

21 June 2006

              Horizonte Minerals plc ('Horizonte' or 'the Group')

Defines Significant Gold Anomaly in Brazil and Advances Peruvian Silver Project

Horizonte Minerals plc, the AIM listed exploration and development company
focused on Brazil and Peru, has defined a significant gold anomaly following
positive results from the first phase of a regional auger drill programme on the
Malvinas target at its 100% owned Tangara gold project in Brazil.  The Company
is also fast tracking a 1,500 metre diamond drill programme at its 100% owned El
Aguila silver,-zinc-lead project, in the Cerro de Pasco region of Central Peru.

Highlights of Tangara Work

• Auger drilling to a maximum depth of 6 meters on the Malvinas zone defined a 
  300 metre by 120 metre gold anomaly in which the mineralisation
  averaged 0.25 g/t gold in 15 holes. This anomaly encloses a high grade core 
  of > 1.0 g/t gold.

• Highlights include; 6 metres grading 2.2 g/t Au (TGA-AG073); 6 metres
  grading 1.2 g/t Au (TGA-AG044) and 6 metres grading 1.07 g/t Au (TGA-AG045). 
  The best auger intersection within the anomalous zone to date is 1m at 8.2g/t.
  (TGA-AG073 @ 4m)

94 shallow holes with maximum depth of 6 metres were drilled by the Company over
the soil anomaly associated with the outcropping sulphide mineralisation. The
holes were drilled on a 100 metre by 40 metre grid with the aim of prioritising
the sub-parallel mineralised zones indicated by old workings. The drilling
defined a single wide zone encompassing both old working trends as defined by a
300 metre by 120 metre gold anomaly in which the holes averaged 0.25 g/t gold in
15 holes. This anomaly encloses a high grade core with an approximate area of 60
metre by 40 metre with an average of 1.0 g/t gold in 4 holes. The highlight of
the shallow auger holes are 6 metres grading 2.2 g/t Au (TGA-AG073); 6 metres
grading 1.2 g/t Au (TGA-AG044) and 6 metres grading 1.07 g/t Au (TGA-AG045).
There is a strong correlation between the gold values and the copper, lead and
zinc values.

An IP geophysical program is expected to start in late-June to define the
vertical extension of this zone. The Competent Person's Report contained in the
Company's AIM admission document dated 2 May 2006 (available on
www.horizonteminerals.com) reports three samples previously taken by Horizonte
from the pit area that returned 14.8 g/t, 4.3 g/t and 3.5 g/t gold.

The auger results have been integrated with the recently acquired
aerogeophysical data set covering the project area from Golden Star Resources
Ltd (GSR).  Re-interpretation of this data has identified the regional
structural framework controlling mineralisation as well as a number of untested,
discrete, magnetic targets within the Malvinas anomaly zone.

A diamond drill rig has been contracted from Servitec Ltda, Brazil to commence a
1,500 m programme in the third quarter 2006 to test the depth continuity of gold
mineralisation at the Malvinas target.

Additional Company News

Horizonte has completed a detailed programme of surface and underground mapping,
trenching and geochemical sampling at the 100% owned El Aguila silver-zinc-lead
project, in the Cerro de Pasco region of Central Peru.  Environmental permitting
is underway for a 1,500 m diamond drill programme, due to commence  on El Aguila
in the last quarter of 2006, with the aim of testing the vertical and lateral
extend of the untested polymetallic veins.

This month's election result where Alan Garcia was elected president of Peru is
viewed as positive for the stability and development of the mining sector.

Horizonte CEO Jeremy Martin said: 'The results from the auger programme at
Tangara are extremely encouraging and demonstrate the aerial extent and
continuity of the gold values.  We are also fast tracking the El Aguila project
through to the drill stage with a view to defining a resource base of high grade
silver-lead-zinc mineralization. As part of our business plan we are looking to
expand our exploration portfolio and are currently evaluating a number of
opportunities.'

Sampling, assaying, and QA/QC

Procedures adopted by Horizonte in the collection, preparation and storage of
samples from the auger drilling program, conform to industry-wide best practice
and with chain of custody being observed for all samples. Analysis is undertaken
by ACME Labs at its laboratories in Vancouver, Canada, and the Company maintains
QA/QC on all analytical work via the inclusion of certified reference materials
and field duplicates and blanks, in addition to monitoring of the laboratory's
own internal check-analyses.

The above information has been reviewed and verified by Mr. Jeremy Martin, a
Director and Chief Executive of Horizonte, for the purposes of the Guidance Note
for Mining, Oil and Gas Companies issued by the London Stock Exchange in March
2006.  Mr. Martin, with six years of mining and management experience, graduated
with a degree in geology from the Camborne School of Mines, and an MSc in
mineral exploration from the University of Leicester and is a member in good
standing with the Society of Economic Geologists and the Institute of Mining
Analysts.

                                  * * ENDS * *

For further information visit:  www.horizonteminerals.com

Contacts
Jeremy Martin/David Hall    Horizonte Minerals plc            Tel: [phone]
David Paxton                Hichens Harrison                  Tel: [phone]
Hugo de Salis               St Brides Media & Finance Ltd     Tel: [phone]
John Frain/Fergal Meegan    Davy                            Tel: [phone]




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