A Contribution to the Geochemical Atlas of the Kingdom of Saudi Arabia: Geochemical Survey of the Yanbu al Bahr Quadrangle 24C

SGS-TR-2011-1 Ibrahim Abdalla, Ahmed Al-Johani, Yaser Al-Ghanmi, Mohammed Al-Nashri, Abdullah Al-Eissa, and Mazen Balkheyour
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ABSTRACT


The -2 mm/+0.177 mm fraction of 664 stream-sediment samples (including 4 percent site duplicates), collected in Yanbu al Bahr from both Late Proterozoic granitic and supracrustal basement terrain and Tertiary sedimentary and lava plateau terrain, was subjected to analysis for 10 major and 57 trace elements by ICP-OES and AAS after HF/ HClO4/ HCl/ HNO3 digestion. The analytical data were used to identify 25 anomalous and elevated multielement targets that are potentially favorable for base-metal and rare element mineralization. The anomalies were identified from detailed examination of individual element distributions and associations.  Of the 25 identified anomalies, seven are rated as Priority 1, nine as Priority 2, and nine as Priority 3, based on the consistency of their elemental associations and their similarities with known ore-deposit types. The Priority 1 anomalies include those that indicate sulfide/gold mineralization (2 targets), sulfide mineralization (1 target), gold mineralization (2 targets), barite/sulphide deposits (1 target), and REE mineralization (1 target). The Priority 2 and Priority 3 anomalies show a variety of elemental associations, including chalcophile elements, gold, Fe-Ti, and REE.  This survey is oriented primarily toward mineral exploration, but its data set can also be used to provide an overview of the environmental problems, geological mapping, and land-use decision making.

 

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Abdalla, I.O., Al-Johani, A.H., Al-Ghanmi, Y.S., Al-Nashri, Mo.O., Sabbahi, A.A., Al-Eisa, a.M.,I., and Balkheyour, M.B., 2011, A contribution to the Geochemical Atlas of the Kingdom of Saudi Arabia: Geochemical Survey of the Yanbu al Bahr quadrangle 24C: Saudi Geological Survey Technical Report SGS-TR-2011-1, 107 p., 103 figs., 3 tables 4 apps