Petrographic Characterization of Hydrothermal Gold Deposits in Adi Gozomo Area, Northwestern Tigray, Ethiopia
Zelealem Haftu1, N. Rao Cheepurupalli2

1Zelealem Haftu,* Department of Geology, School of Mines, Aksum University, Shire, Tigray, Ethiopia.
2N.Rao Cheepurupalli, Department of Mineral Processing Engineering, School of Mines, Aksum University, Shire, Tigray, Ethiopia.
Manuscript received on November 25, 2019. | Revised Manuscript received on December 15, 2019. | Manuscript published on December 30, 2019. | PP: 801-807 | Volume-9 Issue-2, December, 2019. | Retrieval Number:  B3742129219/2020©BEIESP | DOI: 10.35940/ijeat.B3742.129219
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Abstract: Gold mineralization in Adi Gozomo area in northwestern Ethiopia was studied through petrographic analysis from both surface and core rock samples. Mineralization is associated with Neoproterozoic basement rocks comprised of metavolcanic, metasedimentary rocks and intrusives. Four phases of deformation and development of NE-SW foliation and shear zones were some of the common geological structures. The hydrothermal gold deposit s cramped to shear zones, 2nd generation quartz veins, 4th phase of deformation, silisifed and carbonatized alteration zone. Based on decreasing order of abundance the ore assemblage of the area includes pyrite, chalcopyrite, sphalerite, pyrrhotite, arsenopyrite and gold. The petrographic data indicates that the deposit is hydrothermal vein related type and an island arc tectonic setting. The mineralization is comparable with other known orogenic sulfide deposit types of the country in particular and Arabian-Nubian Shield in general.
Keywords: Mineralization, Petrography, Hydrothermal, Adi Gozomo, Tigray.