1- University of Tabriz
2- University of Tarbiat modares
2- University of Tarbiat modares
Abstract: (162 Views)
Abstract
The Quzlo Cu (Pb-Zn) deposit is in the Takab-Mahneshan sub-zone in the Sanandaj-Sirjan zone, NW Iran. This study investigated this deposit's geology, mineralization, alteration, and fluids. The Neoproterozoic-Early Cambrian metamorphic complex in the study area includes amphibolites, various gneisses, and marble interlayers with remnants of serpentine ultramafic rocks, and the metamorphic rocks of the area have been metamorphosed in the amphibolite facies and have progressed to the stage of partial melting and migmatite formation. The Qouzlu copper (lead-zinc) mineralization is formed in the host rock of amphibolite and marble and is often formed within the marble unit and the contact between them, and is formed in the form of masses, layers, laminae, veinlets, disseminated, brecciated, banded and replacement. Chalcopyrite, galena, sphalerite, and pyrite, along with specular hematite, are the most important hypogene minerals, and the most prominent supergene minerals include chalcocite, covellite, malachite, azurite, smithsonite, cerussite, hematite, and goethite. The majority of the host rock in the ore-bearing zones has recorded evidence of contact metamorphosed with the presence of the minerals pyroxene, garnet, amphibole, and epidote along with quartz and carbonate minerals. The most prominent host rock alteration includes silicification and epidotization, and the ore-bearing zones show iron oxide and carbonate alteration. A study of fluids involved with host quartz and sphalerite minerals from the Qozlu mine was conducted. In sphalerite fluid intercalations, the homogenization temperature varied from 145 to 344 degrees and salinity varied from 3 to 7 weight percent NaCl. In quartz fluid intercalations, the homogenization temperature varied from 125 to 570 degrees and salinity varied from 2.5 to 44.5 weight percent NaCl. Accordingly, and by combining field observations, microscopic evidence, and mineral paragenesis with fluid intercalation data, it is inferred that the twin mineralization with the host rock is of the VMS type and was skarned by magmatic fluids.
The Quzlo Cu (Pb-Zn) deposit is in the Takab-Mahneshan sub-zone in the Sanandaj-Sirjan zone, NW Iran. This study investigated this deposit's geology, mineralization, alteration, and fluids. The Neoproterozoic-Early Cambrian metamorphic complex in the study area includes amphibolites, various gneisses, and marble interlayers with remnants of serpentine ultramafic rocks, and the metamorphic rocks of the area have been metamorphosed in the amphibolite facies and have progressed to the stage of partial melting and migmatite formation. The Qouzlu copper (lead-zinc) mineralization is formed in the host rock of amphibolite and marble and is often formed within the marble unit and the contact between them, and is formed in the form of masses, layers, laminae, veinlets, disseminated, brecciated, banded and replacement. Chalcopyrite, galena, sphalerite, and pyrite, along with specular hematite, are the most important hypogene minerals, and the most prominent supergene minerals include chalcocite, covellite, malachite, azurite, smithsonite, cerussite, hematite, and goethite. The majority of the host rock in the ore-bearing zones has recorded evidence of contact metamorphosed with the presence of the minerals pyroxene, garnet, amphibole, and epidote along with quartz and carbonate minerals. The most prominent host rock alteration includes silicification and epidotization, and the ore-bearing zones show iron oxide and carbonate alteration. A study of fluids involved with host quartz and sphalerite minerals from the Qozlu mine was conducted. In sphalerite fluid intercalations, the homogenization temperature varied from 145 to 344 degrees and salinity varied from 3 to 7 weight percent NaCl. In quartz fluid intercalations, the homogenization temperature varied from 125 to 570 degrees and salinity varied from 2.5 to 44.5 weight percent NaCl. Accordingly, and by combining field observations, microscopic evidence, and mineral paragenesis with fluid intercalation data, it is inferred that the twin mineralization with the host rock is of the VMS type and was skarned by magmatic fluids.
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