Examples of using Underground sampling in English and their translations into German
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Phase One willtarget the No Name Zone with both surface drilling and underground sampling.
The underground sampling returned assays from trace to 2.4 g/t Au over 1 meter chips and from trace to 1.7% Cu.
The C1 reserves and resources are reportedly estimated from dataderived by drilling, surface and underground sampling.
Drill spacing and if available, underground sampling is wider and less detailed than is required to support a C1 estimate.
MT of resources are in the Inferred category, as extensions to known veins andnew veins discovered by our recent underground sampling and drilling.
Both the underground sampling and the surface drilling will focus on the No Name Zone mineralized zones.
CEO John Williamson stated,"Recent underground sampling results from the lowest accessible level(841M) have confirmed the records of historic high-grade production at Maria Luisa.
Historical data for the prospects were performed under supervision of a Professional Engineer or a geologist, and believed to be of good quality,with drill core and underground sampling results from fire assay analyses by B. C.
In addition, an ongoing compilation of underground sampling data will be combined with the data obtained from the Company's 2015- 2016 drilling programs, during the option phase, to update the resource base.
Endeavour plans to complete a n updated resource estimate, a preliminary economic assessment and commence mine permitting, in addition to more definitive drilling, underground sampling and metallurgical testing in 2019.
The results from the detailed 3D IP surveys,the assay results of recent surface and underground sampling, and the prior IP results will be used to identify the most prospective drilling targets.
Bradford Cooke,Endeavour CEO commented,"With the success of the 2018 surface drilling, underground sampling and metallurgical testing programs, management now views the Parral Project as having good potential to become a profitable new mine.
Table 1: Underground samples from the Osos 1 concession.
The underground sample yielded 21.8 ppm total cyanide at the same pH at a retention time of 121 minutes.
Figure 1: Underground sample locations on the Osos 1 concession December 2016 sampling by Astorius Resources Ltd.
Structural map of the Maria Luisa vein showing selected Au andCu grades from surface and underground samples.
Combined gravity and cyanide leach ofgravity tailings also yielded encouraging results, recovering 92% of the gold from the underground sample and 90% from the open pit sample. .
Recent results include 12m averaging 2.1g/t gold from hand trenching on the Corona breccia/vein and grab samples ranging up to 32.2 g/t gold and368g/t silver from underground samples of the Bohemia Vein see August 9, 2011 News Release.
The resource was calculated as a pit shell analysis based on a databaseof 1,604 drill holes, 246 underground wall sampling cuts and 224 trench sampling cuts.