Sierra Grande Minerals announced that it has commenced drone-borne magnetic (drone-mag) surveys at both its B&C Springs (B&CS) and Glitra-Sat gold projects in Western Nevada. Sierra will also be conducting geological mapping, prospecting and rock and soil geochemical sampling work while on site. The airborne surveys will be conducted by Pioneer Exploration.

The drone-mag surveys at B&CS and Glitra-Sat will cover the entirety of the two properties. Flight lines will be spaced 50m apart and flown on azimuths perpendicular to known and/or interpreted stratigraphic, structural, and mineralized and altered trends. Technical details of the surveys, and products thereof, are given below.

The aim of the surveys is to outline altered and mineralized trends on the properties, which may be expressed, for example, as magnetic lows reflecting magnetite destructive alteration within relatively magnetic host rocks. This should prove particularly helpful in areas where mineralized trends appear to continue beneath overburden-covered areas. At the Glitra-Sat property a number of areas fall into this category, such as along trend both north and south of the Glitra occurrence, and at the Sat occurrence, where a known gold mineralized zone is covered to the east by unconsolidated material of the pediment, and to the south by alluvial deposits in the Stonehouse valley.

On the B&CS property a similar situation exists. There, extensive but generally thin overburden at the head of a broad and gently-sloping pediment obscures a large area between precious metals showings on the B&CS property. On the west and abutting Almadex's Davis Gold property are recently-sampled showings which yielded a number of high-grade grab samples, including those returning 17.35, 30.9 and 150.5 g/t Au.

On the east is the Mildred Mine area, where soil sampling yielded a number of highly anomalous samples. The new samples were collected by prospectors earlier this year, following the company's recognition of the potential of this area, and after staking program. Furthermore, limited outcrop exposed in drainages lying within the bounds of the wide pediment area between the two gold-mineralized areas on the company's claims indicates that the overburden is thin and thatalteration is at least locally present along structures within the rocks exposed therein.

Following the drone-mag surveys, the company expects that follow-up work will be undertaken with an eventual goal to define drill targets along trends showing the greater potential to host economic mineralization. That work is expected to include ground-based CSAMT (controlled source audio-magnetic telluric) and/or IP (Induced Polarization) geophysical surveys, as well as detailed mapping and sampling.