Gold in mineralized structures.
Available for Joint Venture
The Gertrudis cateo is in the north-eastern part of the Deseado Massif, approximately 100 Km to the NW of the Don Nicolas Mine and 150 Km East of Cerro Negro. The project is reached via approximately 55 kilometers by good unpaved roads and farm tracks to the south-west of the Town of Pico Truncado.
Magna Terra Minerals Inc.
Magna Terra Minerals Inc. has 100% control of the Gertrudis project which is comprised of 3 M.D. concessions constituting 10,000 Hectares.
Geology: The Gertrudis project comprises two mineralized structures which we refer to as the Gertrudis and David veins. These veins are some 300m apart, sub parallel and steeply dipping to the WSW. They are hosted in the “Bajo Pobre Formation”, a largely mafic Jurassic unit, and they are truncated to the north and south by cross cutting structures where they are covered by Cretaceous sediments. To the East the Bajo Pobre Formation is present but appears to be unaltered with only calcite veins at the surface. To the West of the veins is a plane of Cretaceous cover. This field relationship implies considerable exploration potential to the north and south of the known mineralization where we could find continuations of the David and Gertrudis Veins. There is also potential to the West where further parallel structures may be found under cover.
The Gertrudis vein extends for 800m and forms hilly and jagged topography. This vein consists of silicified volcanic and tectonic breccias with an argillic alteration halo. This is a NNW striking structure which dips to the WSW, and is well exposed along most of its length. Average Au from the 86 samples on the Gertrudis Vein is 38 ppb. The Au is accompanied by averages of 75 ppb Hg, 145 ppb As, 53 ppm Pb and 3 ppm Sb. Whilst the averages are low, the maximum values obtained from these elements are 320 ppb Au, 348 ppb Hg, 381 ppm As, 231 ppm Pb and 26 ppm Sb. The David vein is much less prominent and is 400m in length with average Au from 20 samples of 23 ppb. The Au is accompanied by averages of 1312 ppb Hg, 97 ppm As, 57 ppm Pb and 4.7 ppm Sb. The maximum values obtained from this vein are 99 ppb Au, 15,750 ppb Hg, 318 ppm As, 148 ppm Pb and 31 ppm Sb. The low and spotty Au and trace elements in both veins are accompanied by a north to south zoning with the strongest Au numbers at the northern end of the veins and the strongest As numbers occurring at the southern end. Hg and Sb anomalies occur in the David vein but not in the Gertrudis Vein. We interpret the Gertrudis project to represent the top of an epithermal system with the David vein being higher in the system than the Gertrudis Vein and with the system plunging to the SSE.
Planned work on the project includes ground magnetic and IP survey which will serve to identify orientation and depth of mineralization on the David and Gertrudis veins, map their possible extensions and identify further mineralized structures to the West of the known anomalies.