Mar 22 2024Reviewed by Lexie Corner
Globex Mining Enterprises Inc. informed its shareholders that it has acquired 24 unpatented lode claims in Mohave County, northwest Arizona, USA, by staking a total of 200.67 ha (495.84 acres).
The land, called the Salt Spring project, was staked to include several quartz veins with gold-bearing potential, small-scale historic mine workings, and the surrounding area. The project area is situated at the northernmost edge of the historic Gold Basin Mining District. This district is enormous, measuring roughly 18 km (11.18 mi) in length north-south and 7 to 11 km (about 6.84 mi) in width east-west.
Early in the 1870s, the district saw the discovery of gold, with the El Dorado, Excelsior, Golden Rule, and Cyclopic mines producing the majority of the gold produced there until 1932. It is unknown how much gold was produced historically.
Globex has located at least 15 prospects and 14 minor mine workings within the boundaries of its Salt Spring property. Surface discoveries (ceramics, glass, and tins) point to a 1905–1914 time frame for activity.
Globex has already gathered a total of 70 rock samples and conducted preliminary fieldwork, including geological mapping. The southern region of the Salt Spring project area and its surroundings are made up of Proterozoic terrain that is mainly composed of felsic and mafic migmatite gneiss, orthogneiss, dikes, and tiny stocks of granodiorite. A mostly overburdened, buried, northeast-trending fault/shear zone that dips at roughly 45° north is located to the north of the project area.
The Proterozoic rock landscape in the south is divided by this fault from a larger, newer, undeformed composite granitic-dioritic intrusion. The extensive fault zone shows some promise for the discovery of widespread low-grade gold mineralization.
Gold-(Cu) deposition occurred in an environment associated with mesothermal intrusion. Buck quartz veins containing gold and quartz stockwork are positioned along faults and fractures with varying angles and concordantly/strata bound along foliation, particularly along contacts between mafic and felsic gneiss. Particular veins can stretch up to 200 m (656.17 feet) in length, pinch, and swell, and approach diameters of up to 3 m.
However, gold mineralization is not limited to quartz veins; it can also be found dispersed across country rock and in late wall rock breccias. Gold mineralization can be separated into three assemblages with distinct mineral- and metal relationships based on field observations and assay results: Au-only assemblage, Au-Cu assemblage, and Au-Cu-Pb-(Ag) assemblage.
The Au-Cu-Pb assemblage is located in the distal zone of the zoning between the Au-Cu and Au-Cu-Pb metal assemblages. A distinct gold mineralization stage seems to be represented by the Au-only assemblage.
Chip sample B-1 with 17.8 g/t Au and 0.13 % Cu, mine dump grab sample B-6 with 16.2 g/t Au and 0.36 % Cu, linear chip sample B-8 over 1.05 m width (quartz stockwork) with 18 g/t Au and 0.09 % Cu, mine dump grab sample B-29 with 25.6 g/t Au and 0.17 % Cu, linear chip sample B-47 over 0.85 m width (quartz stockwork) with 4.99 g/t Au, and 0.07 % Cu linear chip sample B-68 over 0.8 m width (stockwork) with 3.56 g/t Au and 0.03 % Cu, and channel sample B-34 over 1.0 m width with 4.85 g/t Au and 0.02 % Cu, are among the high-grade assay results of vein and stockwork mineralization.
Samples obtained from fault breccias (with less than 10 % vein quartz fragments) returned 4.41 g/t Au in linear chip sample B-11 over 1.3 m width and 41.4 g/t Au in selected chip sample B-5 over 0.4 m width. Linear chip sample B-19 collected over 3.6 m width from granodiorite and gneiss (without quartz veining) returned 1.79 g/t Au.
Analytical Methods
For preparation and geochemical analysis, samples were put in labeled plastic bags, sealed with a plastic ziplock bag, and sent to American Assay Laboratories (AAL) in Sparks, Nevada, USA. AAL is a laboratory certified to ISO 17025. A 300 g subsample is ground to a size of >85 % - 75 microns after the samples are crushed.
After 5-acid digestion (HNO3, HF, HClO4, HCl, and H3BO3), a 0.5 g subsample of each sample was analyzed using ICP-OES for 11 elements, including silver. Nearly all digestion is achieved with a 5-acid treatment (resistant stages, such as rutile, corundum, and ilmenite, are not digested). A 30 g subsample was subjected to fire assay and ICPOES analysis for the analysis of gold.
Results for gold concentrations of more than 10 g/t were reexamined using gravimetric determination and fire assay on a 30 g subsample. AAL performed regular internal standards and inspections while conducting the analysis.
Source: http://www.globexmining.com/