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Orosur Mining provides Colombia update

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Global Mining Review,

Orosur Mining Inc. has announced an update on the progress of exploration activities at the company's flagship Anzá Project in Colombia.

As previously announced, Monte Águila (the JV between Newmont Corp. and Agnico Eagle Mines Ltd) assumed control of the project in 4Q21 after a major 10 000 m drilling programme, which saw up to five drill rigs operating at Anza. During the hand over process, all drill rigs demobilised as part of a planned changeover to a different drill contractor and rig design (man portable). One new rig was mobilised to focus on drilling regional and deep stratigraphic holes in order to test a variety of geological concepts to assist future targeting.With drilling wound back, geological effort shifted to regional mapping and sampling at the northern and southern extremes of the project that could not be previously reached due to COVID-19 related restrictions on personnel movement.

Results from these activities are extremely positive and several high priority prospects have been defined. It is expected that drilling activities will soon resume once the required permitting has been completed.


Assay results for four diamond drillholes have been received from the ALS laboratory in Lima, Peru – MAP-097, 098, 099 and 100. Key intersections are noted include:

  • MAP-097: 4.35 m at 1.63 g/t gold (Au), 2 g/t/ silver (Ag), 0.71% zinc (Zn).
  • MAP-098:
    • 6.05 m at 2.72 g/t Au, 3.01 g/t Ag, 0.74% Zn.
    • 14.2 m at 1.84 g/t Au, 3.57 g/t Ag, 0.59% Zn.
    • 8.36 m at 14.27 g/t Au, 49.92 g/t Ag, 3.93% Zn.
  • MAP-100: 59.15 m at 0.91 g/t Au, 3.88 g/t Ag, 0.39% Zn.

Surface work – mapping and sampling

Following completion of the initial 10 000m drill programme in 3Q21, and the operational handover of the project, the focus of geological work shifted to regional mapping and sampling. The objective of this work was to define high quality targets that could be drilled once COVID-19 had abated and free movement of staff could resume.

Recent work has delineated highly anomalous results in the NE granted tenements at Pupino and Pepas, with multiple rock chip assays over extensive areas, returning results in excess of 1.5 g/t Au.

In addition, the most recent phase of sampling in the south at Guaimarala has identified a similarly extensive area of highly anomalous gold mineralisation at surface, with some samples returning assays of multiple g/t gold.

The high priority targets of La Cejita and Jesuitas, not being in granted titles, have only been covered in a cursory fashion, however anomalous rock chip samples have been noted.

Planning for drilling

These targets are now nearing the stage of requiring drill testing. The process of permitting (land access and water use) and the development of the required access is now well advanced. Exact timing of the commencement of drilling is dependent upon the outcome of the permitting process and will be communicated when more details become available.

Orosur CEO, Brad George, commented: “Handing over operating control of Anzá was a complex and protracted process, slowing work and news flow. However, this effort was a necessary component of the evolution of the project and is now reaping rewards as our major partners ramp up activities.

“COVID-19 has now abated in the region to the extent that field activities can be undertaken more freely, and we look forward to major drill campaigns restarting on the exciting prospects that have been defined.”

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Gold mining news Silver mining news South American mining news