«Belgorkhimprom» JSC (Minsk, Republic of Belarus):

Dvoskin B. E., Chief Design Engineer, phone: +375 (17) 334-79-37

Kutyrlo V. E., Head of Department, Candidate of Geological and Mineralogical Sciences

Razvodovskiy A. A., Junior Researcher, phone: +375 (17) 334-86-01

Belorusian State University (Minsk, Republic of Belarus):

Kurlovich D. M., Leading Researcher, Candidate of Geographic Sciences, тел.: +375 (17) 209-54-79

Samodurov V. P., Leading Researcher, Candidate of Geological and Mineralogical Sciences, phone: +375 (17) 262-24-95

Within the collaboration with Petroquimica de Venezuela company, «Belgorkhimprom» JSC carries out the scientific-technical accompaniment of geological prospecting works at Navay phosphate deposit in north-western part of Venezuela. Nowadays, La-Linda site is preliminary explored and Los-Monos site is detaily explored at the deposit. Radiometric areal study – gamma-survey – were carried out for estimation of reserves and forecast resources for the purpose of increasing of raw materials base of future mining-concentration complex at the areas, where the drilling operations were not carried out. Anomalies of rate of exposure photon emission dose and their nature were defined at the Rancho Chiri site (Navay deposit), according to materials of radiometric researches. Thick productive phosphate layer (3.5 m) with considerable content of P2O5 was opened by wells' drilling at the chosen areas. This opening proved the efficiency of carrying out of radiometric operations for the purpose of mapping of spreading of phosphate rocks. Continuing of drilling operations allows to make an estimation of reserves of phosphate rocks, according to the system “Regional Commission for Mineral Reserves/State Commission for Mineral Reserves”. Results of researches can be used for the purpose of confirmation of forecast resources (according to R1 and R2 categories) and reserves (according to C2 category) in the areas, directly joint to drilled Los-Monos and La-Linda sites.