MINERALOGY, GEOCHEMISTRY AND GENESIS OF THE CU-BEARING VEINS OF THE NESEN FORMATION, SOUTHWEST OF AMOL, CENTRAL ALBORZ ZONE

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ALAEIBAKHSH NAHID; SHAMANIAN GHOLAM HOSSEIN

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Journal: GEOCHEMISTRY Year:2015 | Volume:4 | Issue:2 Page(s): 107-118

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Title

MINERALOGY, GEOCHEMISTRY AND GENESIS OF THE CU-BEARING VEINS OF THE NESEN FORMATION, SOUTHWEST OF AMOL, CENTRAL ALBORZ ZONE

Author(s)

ALAEIBAKHSH NAHID | SHAMANIAN GHOLAM HOSSEIN | Issue Writer Certificate

Keywords

ALTERATIONQ2

MINERALOGICAL ASSEMBLAGESQ2

CU-BEARING VEINSQ2

CENTRAL ALBORZQ2

NESEN FORMATIONQ2

Abstract

The CU-BEARING VEINS of the NESEN FORMATION are part of the CENTRAL ALBORZ Zone, located 100 km southwest of Amol city. The veins hosted by a sequence of dolomitic limestone of the Elika Formation. Mineralization mostly occurs as open space fillings, taking place as veins and hydrothermal breccias. Chalcopyrite, pyrite, tetrahedrite, quartz, calcite and barite are the main ore minerals which occur during three main stages. The first stage is characterized by the presence of calcite, dolomite, quartz and chalcopyrite. Wall rock dolomitization and silicification occurred in this stage. The second stage, the main mineralization stage in the study area, contains the most intense of sulfide mineralization. The third stage is characterized by the presence of quartz veins and veinlets that cross cut the MINERALOGICAL ASSEMBLAGES of the first and second stages. Colloform chalcedony and barite are the gangue minerals in this stage. Chalcocite, azurite, malachite, goethite and cuprite are the supergene products in the study area. Dolomitization and silicification are the main hydrothermal ALTERATIONs which increased in the vicinity of the veins. Evaluation of the geochemical data set using different multivariate statistical methods has led to make useful prediction of the high grade regions. The geochemical investigations indicate the same distribution pattern of Cu, Zn, Sb, Ba and Sr which have most concentration in the hydrothermal ALTERATION zones. Combinations of geology, mineralogy and geochemical results show the rule of basinal saline hydrothermal solutions in the formation of the Nesen veins. These results suggest that boiling, cooling and dilution were the main ore deposition processes in the area.

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APA: Copy

ALAEIBAKHSH, NAHID, & SHAMANIAN, GHOLAM HOSSEIN. (2015). MINERALOGY, GEOCHEMISTRY AND GENESIS OF THE CU-BEARING VEINS OF THE NESEN FORMATION, SOUTHWEST OF AMOL, CENTRAL ALBORZ ZONE. GEOCHEMISTRY, 4(2), 107-118. SID. https://sid.ir/paper/230844/en

Vancouver: Copy

ALAEIBAKHSH NAHID, SHAMANIAN GHOLAM HOSSEIN. MINERALOGY, GEOCHEMISTRY AND GENESIS OF THE CU-BEARING VEINS OF THE NESEN FORMATION, SOUTHWEST OF AMOL, CENTRAL ALBORZ ZONE. GEOCHEMISTRY[Internet]. 2015;4(2):107-118. Available from: https://sid.ir/paper/230844/en

IEEE: Copy

NAHID ALAEIBAKHSH, and GHOLAM HOSSEIN SHAMANIAN, “MINERALOGY, GEOCHEMISTRY AND GENESIS OF THE CU-BEARING VEINS OF THE NESEN FORMATION, SOUTHWEST OF AMOL, CENTRAL ALBORZ ZONE,” GEOCHEMISTRY, vol. 4, no. 2, pp. 107–118, 2015, [Online]. Available: https://sid.ir/paper/230844/en

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