منطقهبندی کانسنن ، زمینشنییی و للویی خددل کانهزلیی آهن خ تیللی آتشنششنانی- خسنیبی همم،، ج،یمه لاخک، جنیب بندخعباس.

Ore Zoning, Geochemistry and Genesis of Iron Mineralization in Hormuz Volcano-Sedimentary Sequence, Larak Island, South of Bandar Abbas.

Iron mineralization has occurred in Larak Island, located 30 km south of Bandar Abbas, within the Persian Gulf, in the Zagros structural zone. Stratigraphically, Larak Island dominantly consists of the Late Proterozoic Hormuz volcanic-sedimentary series, including rhyolitic lava and tuff, shale, and evaporative sediments. Iron mineralization has occurred in a specific stratigraphic horizon within the volcanicsedimentary sequence. The orebodies involve four ore facies from bottom to top: vein-veinlets, brecciated, massive, and banded. The ore minerals are dominated by magnetite, oligiste, and secondary hematite, goethite and limonite, associated with gangue minerals such as apatite, calcite, quartz, and anhydrite. Wall rock alterations in this area include silicic-sericitic, carbonatic, chloritic, and secondary argillic. The samples obtained from iron ores in the geochemical diagrams including the Fe/Ti versus Al/(Al+Fe+Mn+Na+K+Ca) diagram and Mg versus V/Ti diagram, were plotted in the range of Banded Iron Formation (BIF) deposits. Due to the volcanic-sedimentary nature of the host sequence, lack of observation of glacial sediments, ore facies, ore textures, structures and mineralogy, alteration and geochemical features, the iron mineralization in Larak Island shows the most similarities with the Algoma-type BIF deposits. [ABSTRACT FROM AUTHOR]

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