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Gippsland Limited Announces Exploration Results in Eritrea

Gippsland Limited is pleased to announce the analytical results of rock samples collected during exploration completed on its Adobha Project in Eritrea during May 2010. During the exploration programme, visible copper in the form of malachite (copper carbonate) was located in rocks in the drainage channels and bedrock in target areas E21 & E26.
The work, which included the collection of additional drainage samples, geological mapping and rock-chip sampling, followed-up very encouraging results obtained from a reconnaissance drainage geochemical survey of Thematic Mapper (“TM”) anomalies, completed during November 2009, which yielded anomalous gold and base metal values from three target areas (E14, E21 & E26).
The rock types found in the project area are consistent with those expected in a volcanogenic massive sulphide (VMS) environment and are similar to the geological setting of the large Bisha Cu-Pb-Zn-Au-Ag Deposit located 200km along strike to the south. The presence of widespread copper mineralisation combined with some high lead values in bedrock samples significantly upgrades the prospectivity of Gippsland’s Adobha tenements.
TM Anomaly E26
The analytical results support the field observations of visible copper (in the form of malachite) over a wide area within the TM anomaly. The best results were obtained from the central part of TM anomaly E26 (410900E/1918700NA) where field examination identified discontinuous malachite in bedrock over a width of at least 390m and a strike length of some 520m. In this area visible copper occurs in three separate northerly trending zones representing contacts between altered and unaltered felsic volcanics.
Between the two westernmost zones copper also occurs disseminated within the matrix of the volcanics. Rock-chip samples were collected along seven profiles covering the two western zones in the central area in order to delineate the extent of the mineralisation. Consistent with the presence of visible copper, individual rock samples returned high copper values with the highest assay being 10.63% in a sample of altered felsic volcanic at location 410937E/1918642NA. The systematic sampling along the profiles revealed

Gippsland

Gippsland

Gippsland Limited announces the analytical results of rock samples collected during exploration completed on its Adobha Project in Eritrea during May 2010. During the exploration programme, visible copper in the form of malachite (copper carbonate) was located in rocks in the drainage channels and bedrock in target areas E21 & E26.

The work, which included the collection of additional drainage samples, geological mapping and rock-chip sampling, followed-up very encouraging results obtained from a reconnaissance drainage geochemical survey of Thematic Mapper (“TM”) anomalies, completed during November 2009, which yielded anomalous gold and base metal values from three target areas (E14, E21 & E26).

The rock types found in the project area are consistent with those expected in a volcanogenic massive sulphide (VMS) environment and are similar to the geological setting of the large Bisha Cu-Pb-Zn-Au-Ag Deposit located 200km along strike to the south. The presence of widespread copper mineralisation combined with some high lead values in bedrock samples significantly upgrades the prospectivity of Gippsland’s Adobha tenements.

TM Anomaly E26

The analytical results support the field observations of visible copper (in the form of malachite) over a wide area within the TM anomaly. The best results were obtained from the central part of TM anomaly E26 (410900E/1918700NA) where field examination identified discontinuous malachite in bedrock over a width of at least 390m and a strike length of some 520m. In this area visible copper occurs in three separate northerly trending zones representing contacts between altered and unaltered felsic volcanics.

Between the two westernmost zones copper also occurs disseminated within the matrix of the volcanics. Rock-chip samples were collected along seven profiles covering the two western zones in the central area in order to delineate the extent of the mineralisation. Consistent with the presence of visible copper, individual rock samples returned high copper values with the highest assay being 10.63% in a sample of altered felsic volcanic at location 410937E/1918642NA. The systematic sampling along the profiles revealed widespread copper mineralisation which included a best assay of 0.29% Cu over a 10m interval in profile T26-02. The best assay results are included in the table below.

The third zone of northerly striking copper mineralisation contains visible malachite and is located to the east at around 411240E giving the width of copper mineralisation identified to date of approximately 390m. This zone has not been explored further to the east.

A traverse approximately 2.5km to the north (412000N/1921900EA) located samples of mineralised float in the drainage channel that contained visible malachite. Assays of these three samples returned values of 0.81%, 0.30% & 1.49% Cu and 0.54, 1.37 & 1.15g/t Au respectively. The bedrock source of these samples has not yet been located.

Based on the lithology of the host rocks (which include altered felsic volcanics, chloritic tuffs, volcanic breccias), and the style of the mineralisation, the area is similar to low-grade copper mineralisation typical of the footwall below VMS deposits in many of the Palaeozoic, Proterozoic and Archaean deposits of Australia and Canada.

TM Anomaly E21 (404800E/1905000NA

Anomaly E21 covers a northerly trending sequence of felsic volcanics which outcrop as a steep range of hills parallel to the stratigraphy. Malachite was located in detrital rocks in channels draining a strike length of approximately 2km of the stratigraphic succession. Prospecting along these drainage channels resulted in malachite being located in bedrock discontinuously over a strike length of about 1.7km. )

A short profile of 35m (7 samples) was rock-chip sampled across an outcrop of visible malachite. Three of the samples contained strongly anomalous Cu and Zn with the maximum value being 976ppm Cu.

The exploration to date indicates that the prospective target horizon is located along the upper levels of the ridge where the felsic rocks become more chloritised and there is a higher proportion of volcanic breccias and tuffs. Chloritised felsic tuffs were located at various points along the anomaly which returned anomalous base metal values using a Niton portable XRF analyser. These high base metal values were replicated by chemical analysis with the two best values from rock samples R277 and R279. The presence of anomalous Cu, Pb & Zn values in chloritised felsic volcanic rocks is very encouraging considering the geological environment and is indicative of the close proximity to VMS mineralisation.

Gippsland CEO Jack Telford stated “These very encouraging results, which are consistent with our expectations, greatly increase the potential for the Adobha tenements to yield a significant VMS style deposit.

It is particularly encouraging that the Company’s geological team lead by Chief Geologist Dr John Chisholm has discovered large areas of copper mineralisation so early in the overall exploration programme.”

Related posts:

  1. Gippsland Announces Encouraging Results From Geochemical Survey in Eritrea
  2. Gippsland Second Quarter Activities Report Extract
  3. Eritrea: Gippsland Limited Granted Prospecting Licences
  4. NGEX ANNOUNCES UPDATES ON SOUTH AMERICAN AND ERITREAN DRILL PROGRAMS
  5. Gippsland Ltd - Quarterly Activities Report
  6. Sunridge Gold Announces US$10,000,000 Exploration Funding and Alliance With Antofagasta Minerals S.A. for Eritrea Project
  7. Sunridge Gold and Antofagasta Minerals Exploration Joint-Venture Update, Asmara Project, Eritrea
  8. Sunridge Gold Restarts Exploration Drilling and Mobilizes a Second Drill to the Asmara Project, Eritrea
  9. NGEX Update on Major Exploration Projects in South America and Africa

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