The Yellow Mountain porphyry copper project is located within the Bulgan Province of Northern Mongolia, approximately 230km northwest of Ulaanbaatar. The project consists of a cluster of porphyry related lithocaps occuring within a 15km northwest oriented corridor of porphyry-related alteration and mineralization. This is at the north-western extremity of the Selenge Porphyry belt which hosts the Erdenet copper-molybdenum deposit.
The Yellow Mountain is characterised by the erosional remnants of an advanced argillic lithocap. Several prominent siliceous ledges occur within massive chalcedonic silicification, residual silica, quartz-alunite-diaspore and quartz-pyrophyllite. The lithocap is underlain by sodic illite-pyrite, and laterally enclosed by green andesitic volcanic rock (chlorite-epidote). All alteration types are stained by jarocite and clearly have appreciable pyrite contents at shallow depths. Alteration and field relationships suggest a high level of formation above a deeper porphyry intrusion.
Yellow Mountain target map
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