Tanzanian Royalty Announces Potential Tungsten (W) Occurrences In North- West Tanzania From Licence Held by North West Base Metals (NWBM), A Subsidiary of TRX
Tanzanian Royalty Exploration Corporation is pleased to announce that assay results from 23 grab samples from trenches and rock outcrops in a recent reconnaissance visit to licence held by North West Base Metals (NWBM), a subsidiary of TRX, confirms the area to be potential for base-metal mineralization of tin, tungsten, wolframite and lithium minerals.
-- J.3301: Weighted average 0.40% WO3 from quartz vein lode
-- J.3308: Weighted average 0.24% WO3 from mica granite
-- J.3309: Weighted average 0.11% WO3 from quartz vein lode
-- J.3313: Weighted average 0.06% WO3 from quartz vein in trench
-- J.3318: Weighted average 0.08% WO3 from meta-sediments on granite contact
-- J.3322: Weighted average 0.06% WO3 from quartz vein lode
-- J.3323: Weighted average 0.16% WO3 from quartz vein lode
The mineralization is found in the Kyerwa Tin fields of Northwest Tanzania in the Karagwe-Ankolean Precambrian Belt around mica rich intrusive granites. The Kyerwa Tin fields are approximately 8 km wide and 48 km long within the Karagwe-Ankolean, phyllite-sericite schist-quartzite, metasediments belt.
The sedimentary features of Karagwe - Ankolean rocks reflect shallow-water deposition; low-grade metamorphism has converted many of these units to sericite schists and quartzites. Mica rich granite complexes intrude rocks of this system, and host tin and tungsten mineralization in veins within alteration haloes which surround the intrusive.
Cassiterite (tin oxide) veins are associated with the granites, but occur mostly in the surrounding country rocks. The deposits are both hydrothermal and pegmatitic; hydrothermal deposits contain most of the tin, and pegmatitic deposits contain some columbite-tantalite (coltan) and beryl.
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