1. APPLICATION OF IP/RESISTIVITY “REAL SECTION”
TECHNIQUE IN SEARCH FOR SULPHIDE MINERALIZATION
IN SERBO – MACEDONIAN MASSIF, KOSOVO
POLYTECHNIC UNIVERSITY OF TIRANA
Faculty of Geology and Mines, Department of Earth Sciences
Prof.Dr. Përparim Alikaj
Dr. Altin Karriqi
Dipl. Eng. Erjon Collaku
2. GEOLOGICAL SETTING OF THE STUDIED AREA
The Orllan property is located in the south-western part of the Lece
Magmatic Complex (LMC) in Eastern Kosovo. The LMC is part of the
Serbo-Macedonian-Rhodope province of the Tethyan Metallogenic Belt.
Beginning in the Cretaceous, the region has been a part of the convergent
margin of the Eurasian plate, experiencing a series of Late Cretaceous to
Miocene subduction and collision events interspersed with syn- and post-
orogenic extension.
The main known mineralization occurrence in LMC is porphyry copper
with presence of gold and other associated elements. Only about 3 km
southeast of the exploration grid of Orllan license is located the Tulare
Porphyry Orefield (in Serbia), which used to belong to Avala Resources Ltd
and Dunav Resources Ltd (Fig.1). Kiseljak and Yellowcreek are the main
gold-copper porphyry deposits in this region. The Kiseljak deposit is a
typical calc-alkaline gold-copper porphyry deposit, forming a north
plunging (~70°) pipe intruded into amphibolite and biotite schist country
rock (Arnold & Malhotra 2014). The alteration zones at Kiseljak appear to
be restricted in extent, in contrast to well-developed concentric zonations
more typical of high level porphyries.
3. Regional geology map
with ore fields
around Exploration License 1403
(Courtesy of Dunav Resources ltd.)
5. WHAT IS IP/RESISTIVITY “REAL SECTION”?
“Real Section” is an Electrical Tomography of Induced Polarization and
Resistivity parameters obtained according to an original technique
innovated by myself in Albania in 1978 and successfully implemented in
Canada in 1991.
“Real Section”, markedly improved recently through terrain correction and
the shape of current lines distribution in section can be considered as an
“Physical Inversion” of geoelectrical parameters which accurately
determines the spatial attitude of underground targets.
“Real Section”, used with Gradient array and Schlumberger Soundings has
detected copper sulphide mineralization down to depth 550 m in Perlat,
Mirdita district, Albania and down to 900 m in Potter mine, Ontario,
Canada.
The most important discovery with “Real Section” technique belongs to
San Nicolas giant polymetallic ore deposit in Zacatecas state, Mexico in
1997, consisted of over 100 million ton, at depth 200 m.
14. The borehole BER-1 intersected an interesting geological
section, with similarities to the one of Tulare Cu-Au porphyry
deposit, although with low grades of Cu and Au but important
for Zn and Ag.
The geological formations include gneiss of various
alterations, including brecciation and kaolinization, andesite
of different rate of alteration, as well as quartz veins
(stockwork) of thickness from millimeters to half a meter.
Sulphides (mostly pyrite) with grade from trace to several
percent, and texture from disseminated to thin veins were also
intersected, especially below the depth 250 m.
The hole has remained in mineralization, so deeper holes
would be needed in future.
