Alabuga and Koshdube

Alabuga and Koshdube licensed areas are located in western part of Naryn depression near zone of Fergansky Regional fault and have common boundaries, similar history of geological development, the same prospecting criteria and uranium deposits search parameters.

Naryn depression, in the western part of which Alabuga and Koshdube licensed areas are located, is the largest depression of middle Tyan-Shan. The structures of that fold system are located between Northern and Southern Tyan-Shan in the central part of Kyrgyzstan which is divided by Talas-Fergansky fault to Naryn (Eastern) and Talas-Chankal (Western) parts.

The depression is formed by tertiary and quaternary sediments forming large synclinal fold, axis of which coincides with general near-latitudinal direction of the bend. Tertiary deposits of Naryn Depression are formed by thick mass of fragmental calcareous-clayey and sandy-clayey saline-ferrous sediments with some sporadic organic content.

The cross-section of sediments of the depression western part speckled strata shows high radioactivity layers of greenish-gray sandy-argillaceous material embedded in clayey saline-ferrous sediments. In addition, intersections with higher organic content were detected which could be favorable geo-chemical host for accumulation of minable uranium concentrations.

Preliminary analysis of morph-structural elements showed that the Western part of Naryn Depression adjacent to the zone of Fergansky depth fault is characterized by extreme irregularity of the earth surface relief. Thick network of ravines, canyons, breakthroughs, dry beds, along-meridian strike crevices in the up to 40 km wide area overlaps with abyssal meridian zone of orthogonal system.

Besides, there are number of additional indirect signs of uranium potential of this part of depression: sufficiently wide distribution of local anticline structures; intrusions of strongly metamorphosed bituminous substance along fractures in carbon limestone in pre-Mesozoic foundation of Naryn Depression; presence of uranium manifestations and radioactive anomalies in mountain shed of depression and others.

Therefore, above mentioned testifies that the given territory with obvious signs of stretching in later stages of tectonic activity is extremely favorable for intrusion of ore forming solutions into Neozoic sediments and formation of uranium deposits. At present the described area includes three known uranium-coal occurrences (Aksai, Turuk and Turugart) hosted in the Jurassic coal-bearing rocks and uranium showings confined to the Paleogene-Neogene rock unit (Karabulun, Orto-Nura and Makmal). The highest uranium grades were detected in uranium-coal ore manifestation Aksai returning on average 0.35% (maximum 2.15%). Uranium grades in mineralizations associated with sandy-clay stratums of Neogene are averaging 0.019-0.033% grades.

In 2007 and 2008, reconnaissance/prospecting traverses with radiometric surveys and ground geophysical surveys (DD-IP, gamma ray spectrometry) were carried out to prepare this prospect for drilling program.

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