S. Strashimirov et al., TEMPERATURES OF THE ORE-FORMING PROCESSES IN THE BUCHIM PORPHYRY COPPER-DEPOSIT (MACEDONIA) - DATA FROM FLUID INCLUSION STUDIES, Geology of ore deposits, 38(4), 1996, pp. 333-337
This recent study is the first attempt to establish the temperature of
the ore-forming processes on the basis of fluid inclusion studies in
the Buchim porphyry copper deposit, the largest deposit of this type i
n the territory of Macedonia. The observations are made on samples fro
m quartz in association with ore minerals from the central part of the
deposit (Tzetralni del). Typization of the inclusions studied establi
shed a large presence of three phases of inclusions, containing very o
ften more than one solid phase as a ''daughter'' mineral. These inclus
ions are significant by their relatively large sizes (10-30 pm) and ve
ry high temperatures of homogenization (500-580 degrees C). They are t
ypical for an association with magnetite, hematite, and rutile. The te
mperatures of homogenization for the two-phase inclusions show four ma
ximum ranges (490-460 degrees C, 430-400 degrees C, 370-320 degrees C,
and 200-180 degrees C). These maximums probably mark the temperature
ranges of the deposition of the main mineral assemblage in the deposit
. The largest part of the copper mineralization was formed in the firs
t and in the second temperature interval. Compared with similar copper
deposits from the SE part of the Carpatho-Balkan region, the Buchim d
eposit is much closer to the Elatzite porphyry copper deposit (Panagiu
rishte ore region, Bulgaria) and the Maijdanpek porphyry copper deposi
t (Bor ore district, Yugoslavia).